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ManualsBrandsApple ManualsComputer equipmentColor LaserWriter 12/600 PS ation

Steve Rancourt 5/95

Color LaserWriter 12/600 PS and 12/660 PS

Service Technical Documentation

This document was created with FrameMaker 4.0.4

Summary of content (376 pages)

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Color LaserWriter 12/600 PS and 12/660 PS Service Technical Documentation 5 t 5/9 cour an ve R Ste This document was created with FrameMaker 4.0.
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Thumbnails About Graphics: Using the magnifier tool enables you to zoom into graphics and see greater detail. Bookmarks About Printing: Always use these numbers when printing pages out of Acrobat. Page numbers that appear on the paper do not reflect their true order within the document. Could not open the specified file... If you get this message when trying to launch a QuickTime movie, you may not have enough memory to run MoviePlayer. Try quitting out of other applications.
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K Service Source Color LaserWriter Color LaserWriter 12/600 PS Color LaserWriter 12/660 PS
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Color LaserWriter 12/660 PS 96.11.13.15.
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Color LaserWriter 12/660 PS 3–2 Overview The Color LaserWriter 12/660 PS is an enhanced version of the original Color LaserWriter 12/600 PS. The 12/660 engine and plastics are identical to the original in every respect, and all finished goods and service part numbers apply equally to both printers. The sole differences between the two versions are in the packaging and setup, the ROM and RAM on the I/O controller board, and the driver software.
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Color LaserWriter 12/660 PS 3–3 3 Place the shims under the printer’s feet (as needed) to level the printer. Shim The oil absorption sheets have been installed to eliminate migration of silicon oil during shipping. After leveling the printer, remove the shipping spacers and absorption sheets as described below. 1 Open the fuser access door and remove the two orange spacers and the oil absorption sheet from inside. 96.11.13.15.
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Color LaserWriter 12/660 PS 3–4 2 Open the fuser assembly and remove the oil absorption sheet from the inside of the fuser assembly. I/O Controller Board Changes The Color LaserWriter 12/660 PS comes standard with 16 MB of DRAM and version 2.0 of ROM. All other characteristics of the board remain the same. Note: Version 2.0 of ROM contains fixes for variety of system and networking bugs that have been reported since the release of the original printer. (I/O controllers with 2.
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Color LaserWriter 12/660 PS 3–5 Upgrade Path You can upgrade a Color LaserWriter 12/600 PS to a Color LaserWriter 12/660 PS by installing version 2.0 ROMs onto the customer’s I/O controller board. The version 2.0 ROM upgrade kit is available as P/N 076-0621. The contains eight ROM ICs, a user manual addendum, a software installation CD, and upgrade labels. Note: Install new ROM only if the customer’s printer is exhibiting one of the problems described below.
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Color LaserWriter 12/660 PS 3–6 problem is likely in the application and the ROM upgrade will not help. If possible, try printing the problem file to a printer with version 2.0 ROMs. If there is no improvement, then the problem is elsewhere. • NetWare port number not set properly When setting the NetWare port number through the Apple Printer Utility, the number did not stick. • Changing AppleTalk type fails Changing the AppleTalk “type” on version 1.
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Color LaserWriter 12/660 PS 3–7 the default protocol for the parallel port (TBCP) was changed to Normal and not returned back to TBCP, regardless of configuration switch position. In this scenario text documents would print, but documents with images (binary data) would not. The printer’s ready light would flash for a while, stop, and then nothing would print. Networking bugs fixes in ROM v1.
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Color LaserWriter 12/660 PS 3–8 Installation Reimbursement Program Beginning October 21, 1996, Authorized Apple Resellers and institutions are entitled to receive a $150 reimbursement on the installation(s) of the Color Laserwriter 12/660 PS. Customers who purchase the printer beginning October 21, 1996 are entitled to have the printer set up and installed in the location of their choice at their site.
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1 Basics and Theory 95.08.23.11.
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Color LaserWriter 12/600 PS Basics & Theory 1–2 Chapter Contents I General Information Features ......................................................................................................... 1–5 Specifications .................................................................................................. 1– 6 Safety Information .......................................................................................... 1–10 Laser Safety .......................................................
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Color LaserWriter 12/600 PS Basics & Theory 1–3 V Pickup/Feed System Outline ............................................................................................................ 1–89 Paper Pickup .................................................................................................. 1–90 Overhead Transparency Detection ................................................................ 1–96 Cassette Pickup Board .............................................................................
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Color LaserWriter 12/600 PS I. Basics & Theory 1–4 General Information 95.08.23.11.
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Color LaserWriter 12/600 PS Basics & Theory 1–5 Features Some of the main features of the Color LaserWriter 12/600 PS are as follows: Print Quality The printer has a resolution of 600x600 dots per inch, with color PhotoGrade. Speed The printer prints up to 12 pages per minute in black, cyan, magenta, or yellow; 3 pages per minute in two or more colors; and 1 transparency per minute. Multiplatform Support You can connect the printer to Macintosh, Windows, DOS, and UNIX computers.
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Color LaserWriter 12/600 PS Basics & Theory 1–6 Specifications Marking Engine Canon HX LBP print engine • 3 ppm in color; 12 ppm in black, cyan, magenta, or yellow; 1 ppm for transparencies • 600x600 dpi with Color PhotoGrade • Enhanced 600 dpi grayscale imaging (effective 200-line screen halftone, 122 gray levels) Laser Semiconductor laser GaAlAs • Wavelength: 780 nm • Output power: 1 mW Controller The specifications for the I/O controller board are as follows: • AMD Am29030 30-MHz microprocessor •
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Color LaserWriter 12/600 PS Printer Fonts Basics & Theory 1–7 The following fonts are resident in the printer ROM: • AvantGarde Book, AvantGarde BookOblique, AvantGarde Demi, AvantGarde DemiOblique • Bookman Demi, Bookman DemiItalic, Bookman Light, Bookman LightItalic • Courier, Courier Bold, Courier BoldOblique, Courier Oblique • Helvetica, Helvetica Bold, Helvetica BoldOblique, Helvetica Narrow, Helvetica Narrow Bold, Helvetica Narrow BoldOblique, Helvetica Narrow Oblique, Helvetica Oblique • Helvetic
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Color LaserWriter 12/600 PS Basics & Theory 1–8 Speed Prints 12 pages per minute in monochrome; 3 pages per minute maximum in color; and 1 page per minute for transparencies. Actual speed depends on the images printed and paper size. Printing Materials Uses 16- to 28-pound laser-quality bond (60 to 90 g/m2). Most textured and colored stock is accepted but discouraged, as it will adversely affect color print quality.
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Color LaserWriter 12/600 PS Dimensions Basics & Theory 1–9 Height: 18 in. (46 cm) Width: 21 in. (54 cm) Depth: 23 in. (58 cm) Weight Approximately 110 lb.
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Color LaserWriter 12/600 PS Basics & Theory 1–10 Safety Information Laser Safety The invisible laser beam irradiated within the laser/scanner assembly can be harmful if it comes into contact with your eyes. Consequently, never disassemble the laser/scanner assembly. A cautionary label has been affixed to the top of the laser/scanner assembly. Note: The laser/scanner assembly cannot be adjusted in the field, nor are any of its components available from Apple.
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Color LaserWriter 12/600 PS Basics & Theory 1–11 Status Panel Outline Movie The Color LaserWriter 12/600 PS status panel consists of 4 primary and 17 secondary lights. The primary lights, arranged horizontally along the bottom of the panel, are similar to those on the LED panels on many of Apple’s previous printers. During normal operation, primary lights report general readiness states for consumables, paper supply, and paper feed.
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Color LaserWriter 12/600 PS Basics & Theory 1–12 Status Panel Lights = Flashing These are the possible arrays that customers can see during normal printer operation.
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Color LaserWriter 12/600 PS Basics & Theory 1–13 Density Control Panel The density control panel on the rear of the printer can be used to generate a service test page and to set three distinct types of adjustments. Some adjustment settings are persistent (i.e., they will remain in effect after a printer restart), and some are nonpersistent (i.e., they will default to factory setting after a printer restart).
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Color LaserWriter 12/600 PS Density Adjustments Basics & Theory 1–14 This feature is offered for customers who have multiple Color LaserWriter 12/600 PS printers in a single location and need to adjust one printer to match the output of another. Important: The range of settings is limited. Use this feature only if you have prior experience in four-color density adjustments. The printer needs to be switched on and in a ready state to make density adjustments. Density adjustments are persistent.
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Color LaserWriter 12/600 PS Test Page Pattern Selection Basics & Theory 1–15 This feature allows you to select one of six test page patterns based upon which one would best confirm a print quality issue. Test pattern selection is nonpersistent. After restart, the test page reverts to the vertical line pattern. To select a pattern, 1 Hold down the COLOR SELECT button and press the ENTER button eight times. The four toner lights will flash to indicate that you are in the test pattern selection mode.
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Color LaserWriter 12/600 PS Separation Voltage Designation Basics & Theory 1–16 This feature allows you to override the printer sensing system and force the separation discharge assembly on or off. Forcing-on is intended as a fail-safe in low temperature/low humidity conditions where paper is not properly separating from the transfer drum, and as a countermeasure in some image-offset problems. Forcing-off is a countermeasure against toner displacement.
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Color LaserWriter 12/600 PS Registration Adjustments Basics & Theory 1–17 This feature allows you to adjust the placement of the image area on the page. Registration adjustments require that the printer be placed into a service adjustment mode. Consequently, these adjustments are not designed to be available to end users. Registration adjustments are persistent. To adjust the registration, 1 Turn off the printer. Press and hold the TEST PRINT button and switch the printer back on.
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Color LaserWriter 12/600 PS II. Basics & Theory 1–18 Basic Operation 95.08.23.11.
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Color LaserWriter 12/600 PS Basics & Theory 1–19 Paper Path Animation Animation The icon to the left appears at key points throughout this manual. Clicking it launches a QuickTime animation called “CLW Paper Path.” This animation shows one complete print cycle through the Color LaserWriter 12/600 PS, starting at the point where the final sheet of paper is picked up from the cassette, and ending with the delivery of the paper at the top of the printer.
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Color LaserWriter 12/600 PS Basics & Theory 1–20 Functions Printer functions can be divided into four systems: the overall control system, the image formation system, the laser/scanner system, and the paper pickup/feed system.
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Color LaserWriter 12/600 PS Basics & Theory 1–21 Outline of Electrical System The operation sequence for the printer is controlled by the microcomputers on the DC controller and the mechanical controller boards. When the printer is turned on and enters the standby state, the microcomputer on the DC controller sends signals for driving the laser diode, fuser heaters, and other loads in response to the print signal entered from the I/O controller board.
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Color LaserWriter 12/600 PS Basics & Theory 1–22 Outline of Major Circuit Boards This section describes the functions of the DC controller board and the mechanical controller board. See “Circuit Boards” in the Parts chapter for additional information. DC Controller Board This board controls the printer. When the /PRNT signal is received from the I/O controller, the DC controller sends the print sequence command to the mechanical controller, which then starts controlling various loads.
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Color LaserWriter 12/600 PS Basics & Theory 1–23 DC Controller Input/Output Signals Laser/Scanner Assembly DC Controller Board J111-23 -22 -17 -9 -1,-3,-4,-5, -6,-7,-13,15 -11 Laser Control Board J110-7 -5 -11,-13,-15,-17, -19,-21,-23,-25 Laser Diode -9 J451-1 J102-4 -2 -3 -3 -2 J701-1,-2 -6 -4 -3 -5,-7 J102-10,-11 -6 -8 -9 -5,-7 Beam-Detect Board /VDOENB /LSON NHD SCK1 "L" when video data can be written. "L" to switch ON the laser diode forcibly.
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Color LaserWriter 12/600 PS Basics & Theory 1–24 DC Controller Board Power Supply Power Switch SW1 J101-6 Power Supply Control IC Door Switch SW2 Mechanical Controller Board Fuser Abnormality Detection Circuit Safety Circuit +5V +24V +5V Relay "L" when the power switch is ON. POFF -5 PCONT "L" to turn ON the printer. -7 DOPN "H" when the front door, pickup door, or fuser access door is open.
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Color LaserWriter 12/600 PS Basics & Theory 1–25 DC Controller Board Temperature/ Humidity Sensor J73-1 J2005-5 -2 -4 -4 -2 -3,-5 -1,-3 J2007-6 -7 -9 -8,-10 +5V J112-6 -7 HUMSNS Humidity sensor signal -9 TMPSNS Temperature sensor signal -8,-10 Mechanical Controller Board Density Sensing Board +24V J103-14 +5V -1 Density sensor signal -2 DSNS "H" to enter the color toner -3 /DSEL density sensing mode. "L" to enter the black toner density sensing mode.
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Color LaserWriter 12/600 PS Basics & Theory 1–26 Mechanical Controller Board Input/Output Signals Mechanical Controller Board High-Voltage Power Supply J2008 Serial Communications Cassette Pickup Board J2002 Serial Communications Toner Carousel Sensors Toner Carousel Position Sensor PS4 Toner Cartridge Position Sensor PS3 5VSAVE J2006-4 -6 -5 CL2 Toner Carousel Drive Clutch CL1 Toner Carousel Brake Clutch DEVHP "H" when a flag is detected. See "Carousel Rotational Detection" in this chapter.
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Color LaserWriter 12/600 PS Transfer Drum PS6 Attraction Sensor Basics & Theory DC Controller Board J105 -3 Mechanical Controller Board J112 J2007 -12 -20 ATTSNS "H" when print paper is rolled over the transfer drum. TOPREG "L" switched to "H" when the transfer drum reaches the registration position. "H" switched to "L" when the transfer drum reaches the TOP position. SEPSNS "H" when print paper separates from the transfer drum.
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Color LaserWriter 12/600 PS Basics & Theory 1–28 Outline of Drive System The printer has six motors: the pickup motor, main motor, drum motor, toner carousel motor, cleaning brush motor, and scanner motor. See “Motors/Fans/Heaters” in the Parts chapter for additional information. Pickup Motor (M1) The pickup motor is a two-phase stepping motor in the paper pickup block and is controlled by the cassette pickup board.
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Color LaserWriter 12/600 PS Main Motor (M2) Basics & Theory 1–29 The main motor is a DC brushless motor.
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Color LaserWriter 12/600 PS Basics & Theory 1–30 Basic Sequence of Operation Outline The following table describes the five periods of printer operation. . Period & Duration Purpose Remarks WAIT (Wait) From power-on until the fuser roller temperature reaches the target value. This period finishes in about three minutes at normal room temperature. To warm up the fuser roller to put the printer in the standby state.
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Color LaserWriter 12/600 PS Basics & Theory 1–31 III. Laser/Scanner System 95.08.23.11.
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Color LaserWriter 12/600 PS Basics & Theory 1–32 Laser System Outline When the /PRNT signal is sent from the I/O controller, the DC controller performs Automatic Photoemission Control (APC) to stabilize the intensity of the laser beam. Upon completion of APC, the DC controller generates 8-bit video data signals (DV2-DV9) in accordance with the video signals (VDO0-VDO7) sent by the I/O controller and then sends them to the PWM-IC in the laser/scanner assembly.
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Color LaserWriter 12/600 PS Video Data Processing Basics & Theory 1–33 The video data supplied by the I/O controller is composed of 8-bit video signals (VDO0-VDO7) for each of four colors, M (Magenta), C (Cyan), Y (Yellow), and K (Black), and the Image Mode Select signal (IMCHR) which is used to set either the text mode (binary mode) or the image mode (halftone mode).
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Color LaserWriter 12/600 PS Basics & Theory 1–34 Laser Control Circuit Laser Emission The DC controller generates 8-bit video data signals (DV2-DV9) and mode setting signals (M1-M8) in the gate array (IC109) in accordance with the video signals (VDO0-VDO7) and image mode select signal (IMCHR) sent by the I/O controller. It sends those signals to the PWMIC in the laser driver board.
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Color LaserWriter 12/600 PS Basics & Theory 1–35 Laser Intensity Control The CPU in the DC controller controls the intensity of the laser beam by using the APCUP signal for rough control and the APCLW signal for fine control. The APC-IC (IC103) adds the APCUP and APCLW signals to produce the laser beam intensity control signal (LLCNT), which is then output to the laser driver circuit in the laser/scanner assembly.
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Color LaserWriter 12/600 PS BetweenPages APC Basics & Theory 1–36 Immediately after the initial APC, the printer performs the betweenpages APC for pages and colors. The CPU sets the /VDOENB signal to “H” during the unblanking period. Note: In order to detect the /BDI signal, the laser diode is turned on even during the period that it does not scan the laser beam across the drum. This is referred to as the “unblanking period.
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Color LaserWriter 12/600 PS 1–37 The laser driver circuit turns the laser diode on or off in accordance with the laser drive signal received from the PWM-IC when the videoenable signal (/VDOENB) is “L” and the forcible laser-on signal (/LSON) supplied by the DC controller is “H.
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Color LaserWriter 12/600 PS Basics & Theory 1–38 Scanner System Outline The scanning mirror is a critical part in the scanner unit. It is mounted on the scanner motor shaft and rotates with the scanner motor. The rotation of the scanner motor is controlled by the scanner driver, so that the laser beam reflected by the scanning mirror scans across the photosensitive drum at a constant speed.
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Color LaserWriter 12/600 PS 1–39 /PRNT The scanner motor is a three-phase, 8-pole DC brushless motor with a hall element. It is incorporated in a single unit with the scanner driver which controls it so that the motor rotates at a constant speed. When the printer is turned on, the oscillation frequency of the crystal oscillator (X103) is divided by the gate array (IC109) and the resulting signal is sent as the SCNCLK signal to the scanner driver.
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Color LaserWriter 12/600 PS Basics & Theory 1–40 IV. Image Formation System 95.08.23.11.
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Color LaserWriter 12/600 PS Basics & Theory 1–41 Outline The image formation system is the nucleus of the printer. Its major components are the photoconductor cartridge, transfer drum, toner carousel with toner cartridges, and fuser assembly.
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Color LaserWriter 12/600 PS Basics & Theory 1–42 The transfer drum is also cleaned periodically to remove toner. However, its surface is discharged to eliminate remaining charges. See “Imaging Stage 4: Transfer Drum Cleaning and Discharge” later in this chapter.
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Color LaserWriter 12/600 PS Basics & Theory 1–43 Photoconductor Cartridge Outline The photoconductor cartridge comprises the primary charging roller, photosensitive drum, and cleaner unit. Cleaner Primary Charging Roller Photosensitive Drum The external surface of the photosensitive drum is a photoconductive layer using an organic photoconductor (OPC), and the inner side is an aluminum substrate.
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Color LaserWriter 12/600 PS Basics & Theory 1–44 Toner Cartridge Outline The toner cartridge includes a toner container with stirring plate, a toner feed roller, rubber blade, and developing cylinder. The developing cylinder, toner feed roller, and stirring plate receive rotational drive through the white toner cartridge drive gear on the photoconductor drive shaft. Toner carousel motor M3 supplies this drive in sync with the drive supplied to the photosensitive drum by drum motor M4.
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Color LaserWriter 12/600 PS CartridgePresence Detection Basics & Theory 1–45 The printer has cartridge-presence and toner-level detecting functions. Both these functions are served by toner sensor PS11. Cartridge presence is sensed when the cartridge is in the “stop” position. When a toner cartridge is in the “stop” position, the LED of toner sensor PS11 emits lights through a light pipe in the toner carousel. Each cartridge bay has its own light pipe.
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Color LaserWriter 12/600 PS Toner-Level Detection Basics & Theory 1–46 When it presses against the photosensitive drum, the cartridge shifts just enough so that the light from PS11 aligns with a window in the bottom of the cartridge. In a totally empty cartridge, the light beam would shoot through this window, out a second window in the top of the cartridge, and strike the receiving diode of PS11.
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Color LaserWriter 12/600 PS Basics & Theory 1–47 Stages of Imaging The print process is roughly divided into the six stages shown below.
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Color LaserWriter 12/600 PS Basics & Theory 1–48 Stage 1: Electrostatic Latent Image Formation This stage consists of two steps, primary charging and scanning exposure. Upon completion of this stage, the points on the drum that are struck by a laser beam have their charge neutralized, while those points not struck remain negatively charged. The image that is irradiated onto the drum in this manner is invisible and is therefore referred to as a “latent” image.
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Color LaserWriter 12/600 PS Step 1: Primary Charging Basics & Theory 1–49 As a preliminary step in forming the latent image, the surface of the photosensitive drum is uniformly charged with negative potential. The primary charging is done by directly imparting charges onto the photosensitive drum. In order to keep uniform the surface potential charged on the surface of the photosensitive drum, AC bias is superimposed on the primary charging roller in addition to the DC bias.
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Color LaserWriter 12/600 PS Basics & Theory 1–50 Stage 2: Developing In this stage, the toner is placed on the electrostatic latent image on the photosensitive drum, making the image visible. Step 3: Developing The toner used for the printer is a single-component nonmagnetic toner composed of resin. This toner is unique for its insulating property, and is charged with negative potential by friction between the rotating cylinder and blade surface.
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Color LaserWriter 12/600 PS Basics & Theory 1–51 Stage 3: Photosensitive Drum Cleaning Step 4: Photosensitive Drum Cleaning During the transfer stage, a small amount of toner does not transfer onto the paper. To prepare for the next imaging cycle, the toner remaining on the photosensitive drum surface is scraped by the cleaner blade and the drum is cleaned.
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Color LaserWriter 12/600 PS Basics & Theory 1–52 When the photosensitive drum door opens, the shutter lever is released, and the waste toner shutter of the photoconductor closes so that the waste toner is no longer exhausted. Shutter Lever Toner Disposal Box Opening the disposal box cover releases the shutter lever and closes the waste toner outlet. Waste Toner Outlet Waste Toner Outlet Shutter Lever Closing the disposal box cover presses the shutter lever and opens the waste toner outlet.
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Color LaserWriter 12/600 PS Basics & Theory 1–53 Stage 4: Transfer This stage consists of four steps: grip, attraction, transfer, and separation. This stage is where the toner image is mapped from the photosensitive drum onto the paper. Step 5: Grip When the paper reaches the transfer drum, its leading edge is retained by the gripper so that the paper is retained on the transfer drum surface.
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Color LaserWriter 12/600 PS Step 6: Attraction Basics & Theory 1–54 The attraction roller imparts negative charges onto the paper and helps hold the paper to the transfer drum surface by means of electrostatic force. The attraction roller presses only for the first color and separates from the transfer drum upon completion of the transfer operation for the first color. Note: If you select “Best” as the print quality mode, the entire sheet receives the attraction charge prior to any imaging.
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Color LaserWriter 12/600 PS Step 7: Toner Transfer Basics & Theory 1–55 The paper attracted to the transfer drum is transported in correspondence with the rotation of the transfer drum. At this time, positive charges are applied to the reverse side of the transfer sheet to transfer the toner from the photosensitive drum to the paper. This process repeats sequentially for each color (M, C, Y, K).
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Color LaserWriter 12/600 PS Step 8: Separation Basics & Theory 1–56 Paper is separated from the transfer drum by the gripper and separation claw. After passing through the separation discharge assembly, the leading edge of the paper is pushed up by the gripper and the paper is separated from the transfer drum surface by the separation claw.
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Color LaserWriter 12/600 PS Basics & Theory 1–57 Stage 5: Transfer Drum Cleaning and Discharge After the page has left the transfer drum, the printer must return the drum to a clean and electrically neutral state. Step 9: Transfer Drum Cleaning During density calibration and after some paper jams, unfused toner may find its way onto the surface of the transfer drum. The transfer drum cleaning brush is designed to scrape this residual toner off the transfer drum.
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Color LaserWriter 12/600 PS Step 10: Discharge Basics & Theory 1–58 AC bias is applied by the discharge roller to eliminate charges remaining on the transfer drum surface after the separation of the paper. The value of the AC bias varies in line with the temperature/humidity sensing system. Transfer Drum Discharge Roller (Rotates by Friction) AC Bias Note: For more information, see “Discharge Roller” in the “Pickup/Feed System” section of this chapter.
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Color LaserWriter 12/600 PS Basics & Theory 1–59 Stage 6: Fusing Step 11: Fusing In the transfer stage, the toner image transferred onto the paper adheres to it only by means of static electricity, and is susceptible to distortion when touched by hand. To avoid this problem, the fuser assembly fuses and mixes the paper and the four toners to create a permanent image. Note: For more information, see “Transfer Drum Cleaning Assembly” in the “Pickup/Feed System” section of this chapter.
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Color LaserWriter 12/600 PS Basics & Theory 1–60 High-Voltage Control: Outline The high-voltage power supply of the printer is controlled by the highvoltage control IC (IC1003). In serial communication with the mechanical controller, IC1003 applies voltages to the primary charging roller, developing cylinder, transfer drum, attraction roller, discharge roller, separation discharge assembly, and upper fuser roller in response to the instructions from the mechanical controller.
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Color LaserWriter 12/600 PS Basics & Theory 1–61 High-Voltage Control: Operation When the /PRNT signal sent from the I/O controller goes “L,” and the print sequence command is entered from the DC controller to the mechanical controller, the mechanical controller rotates the drum motor and controls the high-voltage control IC (IC1003) on the high-voltage power supply board as follows.
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Color LaserWriter 12/600 PS Basics & Theory 1–62 For the initial rotations, IC1003 sets the /HV1DC1 signal to “L” and the /HV1DC0 signal to “L” to apply between-colors bias/between-pages bias to the primary charging roller. Then, the /HV1DC1 signal goes “L” and the /HV1AC1 signal goes “H” so that the primary charging roller is charged with the print bias with the primary charging voltage AC bias and DC bias being superimposed.
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Color LaserWriter 12/600 PS Developing Bias Basics & Theory 1–63 When the print sequence starts, the primary charging voltage (AC/DC) is applied and the toner cartridge is pressed against the photosensitive drum to rotate the developing cylinder.
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Color LaserWriter 12/600 PS Basics & Theory 1–64 As the density adjustment signal (for the developing bias) (/DEVPWM) adjusts image density according to density instructions from the mechanical controller, IC1003 changes the amplitude value of the developing DC bias and the developing AC bias. The /DEVPWM signal varies according to image density correction control and the setting of the density control panel.
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Color LaserWriter 12/600 PS Voltage to Transfer Drum Basics & Theory 1–65 The transfer drum is charged with print bias and between-colors bias according to each print sequence. For print bias, positive voltage is applied to the transfer drum in order to transfer the toner on the photosensitive drum surface onto the paper.
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Color LaserWriter 12/600 PS Basics & Theory 1–66 For full-color transfer, the transfer force weakens as the number of negatively charged toner particles on the paper increases as the transfer step proceeds with the first color, second color and so on. To counteract this effect, the transfer bias is gradually increased for the second and subsequent colors.
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Color LaserWriter 12/600 PS Voltage to Separation Discharge Assembly Basics & Theory 1–67 Separation AC voltage is applied to the separation discharge assembly to aid in paper separation when a low temperature and low humidity environment is detected by the temperature/humidity sensing system. Separation DC voltage usually is applied to the upper fuser roller and the separation discharge assembly in print period.
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Color LaserWriter 12/600 PS Basics & Theory 1–68 Photosensitive Drum Life Detection Outline The printer determines the life of the photosensitive drum mathematically by tracking page count. When a new photoconductor cartridge is installed, the EEPROM on the DC controller board logs the current page count of the printer. This value becomes the starting page count for that photoconductor.
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Color LaserWriter 12/600 PS Basics & Theory 1–69 After charging for a specified period of time, the /HV1DC1 signal is set to “H,” the application of the primary DC voltage is stopped, and the discharging current value is measured by the photosensitive drum thickness detection circuit on the high-voltage power supply board. The measured current value is sent from the high-voltage control IC to the mechanical controller as the drum thickness sense signals (SENSE0 and SENSE1).
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Color LaserWriter 12/600 PS Basics & Theory 1–70 Transfer Drum Transfer Drum Shaft Roller Separation Cam 2 Separation Cam 1 When you lower the transfer drum lever, drum separation cam 2 moves the transfer drum away from the photosensitive drum in a manner identical to the solenoid-controlled operation described above. Transfer Drum Separation Cam 2 Roller Transfer Drum Lever 95.08.23.11.
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Color LaserWriter 12/600 PS Basics & Theory 1–71 Toner Carousel Control: Outline The toner carousel consists of four cylindrical bays clustered around a central press assembly. Each bay is occupied by a single cartridge. Fetch When you load a cartridge into the printer, that color is said to be in a “fetch” position. As the cartridge clicks into place, nine separate pins engage. These pins assure a solid coupling that is critical to the mechanical functionality of the printer.
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Color LaserWriter 12/600 PS Basics & Theory 1–72 Mechanical drive is delivered to the toner carousel in three phases: the rotation of the toner carousel itself, the press and separation of the toner cartridge, and the rotation of the developing cylinder. This sequencing is accomplished by varying the rotational direction of the toner carousel motor and the switching of the toner carousel drive clutch (CL2). The three phases are delivered from three separate points on the printer drive assembly.
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Color LaserWriter 12/600 PS Basics & Theory 1–73 Toner Cartridge Installation Pins 1, 2, 3 The front face of the toner cartridge has three triangular projections on which positioning pins are mounted. Pins 1 and 3 on the sides mate into the hard plastic of the carousel. Pin 2 on the top mates into a white nylon bushing. These pins help fix the cartridge housing to the carousel in a rotational axis, while still allowing for the slight lateral press that occurs during development.
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Color LaserWriter 12/600 PS Pins 7, 8 Basics & Theory 1–74 The 3/8" (95 mm) wide pin 7 at the center-point of the cartridge mates into a slot in a spring-loaded bushing in the carousel end panel. This pin functions similarly to pin 2. Pin 8 is the flex-type pin on the rear face of the cartridge. It mates into a slot in the same bushing as pin 7 described above, but its function is entirely different.
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Color LaserWriter 12/600 PS Basics & Theory 1–75 Carousel Rotation The carousel rotates to advance the next toner cartridge to the photosensitive drum. Internal workings of the toner cartridge rotate independently of the housing. Internal workings remain level throughout carousel rotation. Photosensitive Drum Toner carousel motor M3 delivers rotational drive at this point.
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Color LaserWriter 12/600 PS Carousel Rotational Position Detection Basics & Theory 1–76 The rotational position of the toner carousel is detected by the toner carousel position sensor (PS4) by monitoring the number of passing rotational position flags. The eight rotational position flags include the home position flag (which also serves as magenta cartridge fetch position flag) and the fetch and stop position flags for each of three other colors. The home, fetch, and stop flags are of different widths.
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Color LaserWriter 12/600 PS Toner Cartridge Position Detection Basics & Theory 1–77 The press/separation of the toner cartridge is detected by the toner cartridge position sensor (PS3) by monitoring the position detection flag. When the cartridge is separated from the drum, the flag interrupts PS3 and the toner cartridge position sensor signal (/DEVCAM) is set to “L.” When the cartridge is pressed against the drum, the flag leaves PS3 and /DEVCAM is set to “H.
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Color LaserWriter 12/600 PS Carousel Rotation Failure Basics & Theory 1–78 When the following phenomena are detected by the toner carousel position sensor (PS4), the DC controller is notified by the mechanical controller and judges them as carousel rotation failures. The DC controller notifies the I/O controller of the faults and stops the printer. • PS4 does not detect the rotational position flag even though the toner carousel motor rotates.
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Color LaserWriter 12/600 PS Toner Cartridge Stop Basics & Theory 1–79 The carousel stops when the next toner cartridge is facing the photosensitive drum. Photosensitive Drum 2 4 1 3 1. Cartridge Press Drive Gear (Behind Chassis Wall) 2. Shaft 3. Cartridge Press Cam (1 of 4) 4. Cartridge Press Actuator (1 of 2) When the mechanical controller detects that the carousel has rotated to a stop position, the controller turns off the toner carousel motor.
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Color LaserWriter 12/600 PS Toner Cartridge Press Basics & Theory 1–80 The toner cartridge is pressed against the photosensitive drum. Photosensitive Drum Press Drive Gear Toner carousel motor M3 delivers cartridge press drive through this gear. Press Cam Actuator (1 of 2). After the toner cartridge comes to a stop facing the photosensitive drum, the mechanical controller reverses the toner carousel motor. The cartridge press cams are driven by the toner carousel motor via the press drive gear.
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Color LaserWriter 12/600 PS Developing Cylinder Drive Basics & Theory 1–81 The toner carousel motor rotates the developing cylinder. Photosensitive Drum Stirring Plate Developing Cylinder Toner Feed Roller Photosensitive drum receives rotational drive through the coupling at the center of this gear. Toner carousel motor M3 delivers developing cylinder drive at this point. Developing Cylinder This mockup does not show toner carousel and photosensitive drum.
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Color LaserWriter 12/600 PS Toner Cartridge Separation Basics & Theory 1–82 The toner cartridge separates from the photosensitive drum after the development process. Photosensitive Drum Actuator (1 of 2) Gear Actuators and Gear During Press Actuator (1 of 2) Gear Actuators and Gear After Separation After the developing cylinder ceases to rotate, the mechanical controller reverses the toner carousel motor.
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Color LaserWriter 12/600 PS Carousel Motor Drive Circuit Basics & Theory 1–83 The toner carousel motor (M3) is a two-phase stepping motor. The toner carousel motor is controlled by the toner carousel motor driver (Q2003) on the mechanical controller. This motor transmits the driving force to the toner carousel and the toner cartridge press cam.
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Color LaserWriter 12/600 PS Basics & Theory 1–84 Image Quality Stability Control Outline The printer is protected by an image quality control system that minimizes image density fluctuations caused by environmental changes, photosensitive drum wear, and degradation of toner.
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Color LaserWriter 12/600 PS Basics & Theory 1–85 Temperature/Humidity Sensing System The printer has a temperature/humidity sensor board installed under the far end of the toner release assembly. Temperature/Humidity Sensor Board Toner Release Assembly The DC controller monitors this sensor and adjusts the following highvoltage values if a change in temperature or humidity is sensed.
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Color LaserWriter 12/600 PS Basics & Theory 1–86 Density Calibration System Density Control Maximum density control is performed to stabilize the maximum density for each color. This determines an optimum developing bias. Halftone Correction Control The gate array (IC109) in the DC controller contains the halftone correction table (see below) used to correct the laser output in order to obtain an ideal halftone image.
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Color LaserWriter 12/600 PS Basics & Theory 1–87 At each of the five intervals specified previously, the DC controller prints a series of patches directly onto the transfer drum. The light emitted by the PS14 LED is reflected off these patches and back into the photodiode of PS14. The reflective characteristics of colored toner and black toner differ.
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Color LaserWriter 12/600 PS V. Basics & Theory 1–88 Pickup/Feed System 95.08.23.11.
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Color LaserWriter 12/600 PS Basics & Theory 1–89 Outline When the /PRNT signal is sent to the DC controller by the I/O controller and the scanner motor is put in the ready state, the DC controller issues the print sequence command to the mechanical controller, which then starts printing. After a sheet of paper is picked up by either the cassette or the manual feed pickup rollers, the feed rollers advance it to the registration roller, which corrects any skew.
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Color LaserWriter 12/600 PS Basics & Theory 1–90 Paper Pickup When the print sequence command is received, the mechanical controller drives the main motor (M2) and, 0.2 second later, also drives the drum motor (M4) and the pickup motor (M1). Simultaneously, the pickup solenoid (SL1) is turned on and the drive of the pickup motor is transferred to the pickup roller, feed rollers, and separation roller.
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Color LaserWriter 12/600 PS Basics & Theory 1–91 Animation The three sensors described below govern paper feed from the cassette. PS302 and PS303 are also active in print cycles originating from the multipurpose tray or optional sheet feeder. Each of these sensors is contained on the cassette pickup board (P/N 922-1311). Two are reflector type sensors and one is a conventional photo-interrupter sensor.
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Color LaserWriter 12/600 PS Multifeed Prevention Mechanism Basics & Theory 1–92 For cassette feeding, the printer uses the separation roller to prevent multifeeding. Normally, the separation roller is given rotational force reverse that of the feed roller. However, since the separation roller is equipped with a torque limiter, it rotates with the feed roller by transmission of its rotational force via the transported paper.
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Color LaserWriter 12/600 PS Manual Feeding Basics & Theory 1–93 The presence of paper in the manual feed tray is detected by the manual feed paper-present sensor (PS1). Upon receiving the print sequence command, the mechanical controller drives the main motor (M2) and 0.2 second later also drives the drum motor (M4) and the pickup motor (M1). After 0.5 second, the manual feed solenoid (SL2) is turned on to transmit the rotational force of the pickup motor to the manual feed pickup roller.
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Color LaserWriter 12/600 PS Paper Size Basics & Theory 1–94 The paper size in the cassette is detected by the cassette size-sensing switches (CSW1, 2, and 3) on the cassette size-sensing board. Loading the cassette will turn the switches on or off as applicable. The CPU on the DC controller detects the presence of the cassette and its size by this switch combination.
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Color LaserWriter 12/600 PS Basics & Theory 1–95 For the universal cassette, the actuators that press the cassette sizesensing switches are linked with the paper guide in the cassette. When the paper guide is set to the paper size, the positioning of projections changes accordingly. Actuator Projection Paper Guide Note: If the toner release handle is pulled out, the ejection sensing switch (SW1601) is turned on.
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Color LaserWriter 12/600 PS Basics & Theory 1–96 Overhead Transparency Detection When you use overhead transparency material for this printer, you must use the type with a white band at its leading edge.
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Color LaserWriter 12/600 PS Basics & Theory 1–97 Cassette Pickup Board The cassette pickup board carries out serial communication with the mechanical controller to control the pickup operation. IC301 Controls communications with the mechanical controller and the operation of the cassette pickup board. IC302 Controls the operation of the pickup motor. PS301 Cassette paper sensor. When there is no paper in the cassette, the cassette paper sensor signal (CPSNS) goes “H.
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Color LaserWriter 12/600 PS Basics & Theory 1–98 Cassette Pickup Board IC301 8 9 10 11 IC302 5 6 16 17 J304-6 -5 -4 -3 -2 -1 /AO AO /BO BO CA CB 1 8 11 18 6 M1 Pickup Motor +5V +24V /CPFED 19 J303-2 -1 SL1 Cassette Feed Solenoid +5V Mechanical Controller Board DC Controller Board 21 +24V /MPFED J302-6 -7 SL2 Manual Feed Solenoid +24V /REGFED J302-9 -10 CL3 Registration Roller Clutch +5V 20 7 +5V 16 MPSSNS J302-1 -3 PS2 17 J302-4 -6 MPPSNS PS1 Manual Feed Paper Width Sensor
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Color LaserWriter 12/600 PS Pickup Motor Drive Circuit Basics & Theory 1–99 The pickup motor is a two-phase stepping motor located in the pickup block. This motor drives the cassette pickup roller, the manual feed pickup roller, the separation roller, the registration roller, feed rollers 1 and 2, and the paper lifting plate press cam. The pickup motor is controlled by the pickup motor driver (IC302) on the cassette pickup board. IC302 sets the pickup motor drive signal to “L” to drive the main motor 0.
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Color LaserWriter 12/600 PS Basics & Theory 1–100 Transfer Drum and Peripherals The transfer drum is the mechanism that enables multiple-pass printing. It clamps the leading edge of the paper by means of a solenoid-actuated gripper, attracts and holds the paper to its surface, and then carries the paper past the photosensitive drum where toner transfer occurs. In fullcolor mode, toner transfer occurs four times per page, while in the monochrome mode transfer occurs once.
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Color LaserWriter 12/600 PS Basics & Theory 1–101 When the paper cued at the paper leading-edge sensor (PS303) begins feeding, the gripper drive signal (GRIPON) goes “H” and the gripper drive solenoid (SL4) is turned on to open the gripper on the transfer drum. The paper is then fed 1.3 times faster than the transfer drum speed so that its leading edge will be pushed into the opened gripper.
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Color LaserWriter 12/600 PS Gripper Control Basics & Theory 1–102 The opening and closing of the gripper are controlled by the gripper drive signal (GRIPON) sent from the mechanical controller. When the GRIPON signal turns “H,” the gripper solenoid (SL4) is turned on, and the gripper drive cam is pressed. Meanwhile, the gripper drive arm in the transfer drum rotates around the transfer drum shaft along with the transfer drum rotation.
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Color LaserWriter 12/600 PS Attraction Roller Basics & Theory 1–103 The attraction roller is normally separated from the transfer drum, and it is pressed against it as necessary. After the gripper solenoid (SL4) is turned on and the paper top is clamped by the gripper, the attraction roller press solenoid (SL6) is turned on. The rotation of the main motor actuates the attraction roller press cam to press the attraction roller against the transfer drum.
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Color LaserWriter 12/600 PS Basics & Theory 1–104 The attraction roller is not driven by any motor, but rotates along with the transfer drum. When the paper reaches the attraction roller, the attraction voltage corresponding to one cycle of the transfer drum is applied to the attraction roller. Thus, the paper is electrostatically attracted by the transfer drum. In the full-color mode, the attraction roller rotates for the first color only.
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Color LaserWriter 12/600 PS Separation Basics & Theory 1–105 Upon completion of the transfer, the gripper solenoid (SL4) is turned on and the gripper opens to raise the leading edge of the paper. The separation claw solenoid (SL5) is also turned on to actuate the separation claw, which then scoops up the leading edge of the paper to separate the paper from the transfer drum. The separation of the paper is detected by the separation sensor (PS7).
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Color LaserWriter 12/600 PS Transfer Drum Cleaning Assembly Basics & Theory 1–106 The transfer drum cleaning assembly is operated following every 100 prints, upon power-on, door-open/close or cleaning of the density detection pattern after image quality stability control. The transfer drum cleaner is normally separated from the transfer drum.
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Color LaserWriter 12/600 PS Discharge Roller Basics & Theory 1–107 The discharge roller is normally pushed up by the discharge roller press cam so that it is separated from the transfer roller. After the paper is separated from the transfer drum, the discharge roller press solenoid (SL9) is turned on to release the cam and thus press the discharge roller against the transfer drum.
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Color LaserWriter 12/600 PS Drum Motor Drive Circuit Basics & Theory 1–108 The drum motor is a two-phase stepping motor controlled by the drum motor driver (Q2002) on the mechanical controller. It drives the photosensitive drum and the transfer drum.
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Color LaserWriter 12/600 PS Cleaning Brush Motor Drive Circuit Basics & Theory 1–109 The cleaning brush motor is a DC brushless motor. Controlled by the CPU on the mechanical controller, it is used to drive the cleaning brush.
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Color LaserWriter 12/600 PS Basics & Theory 1–110 Fuser Assembly The paper separated from the transfer drum is fed into the fuser assembly and then delivered from it after passing through the upper and lower fuser rollers and the fuser assembly delivery roller. This delivery from the fuser assembly is detected by the delivery paper sensor (PS9).
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Color LaserWriter 12/600 PS Basics & Theory 1–111 When the registration position for the fourth color in the full-color mode or the first registration position in the monochrome mode is detected on the transfer drum, the mechanical controller turns on the fuser assembly drive clutch (CL4). This transmits the rotation of the main motor to the upper and lower fuser rollers, the fuser delivery roller, the oil applying roller, and the oil pump.
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Color LaserWriter 12/600 PS Transparency Mode Basics & Theory 1–112 The fusing characteristics of overhead transparencies are poorer than that of normal paper. To improve the fusibility, the feed speed for a transparency is slowed down to half that of normal paper while the transparency is passing through the fuser assembly. The distance between the transfer drum and the fuser assembly is short.
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Color LaserWriter 12/600 PS Fuser Temperature Control Basics & Theory 1–113 The fuser temperature is detected by the thermistor (TH) on the lower fuser roller surface. As the surface temperature of the lower fuser roller rises, the resistance value of TH lowers and the voltage of the fuser temperature detect signal (THI) sent to the IC102 in the DC controller and the safety circuit in the power supply unit decreases.
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Color LaserWriter 12/600 PS Basics & Theory 1–114 The printer starts to raise the fuser temperature while it is in the wait period, and when the temperature reaches the target value the printer enters the standby state. Note: If the fuser temperature reaches the target value while image quality stability control and toner cartridge detection are still in progress, the printer will not enter the standby state.
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Color LaserWriter 12/600 PS Fuser Assembly Errors Basics & Theory 1–115 In order to prevent the fuser heater from malfunctioning, the printer provides the following three error detection functions. Full description of these functions are on the following pages. Error Type A The CPU monitors the voltage of the fuser temperature detect signal (THI). If it detects any abnormal value, it will notify the I/O controller as a fuser heater error and then shut off the power supplied to the heater.
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Color LaserWriter 12/600 PS Fuser Error A: DC Controller Detects a Fuser Heater Error Basics & Theory 1–116 If the fuser assembly is abnormally heated or if the fuser assembly does not reach the specified temperature for some reason, the DC controller will store a fuser heater error and then shut off the power supplied to the heater. The DC controller notifies the I/O controller of this fuser heater error.
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Color LaserWriter 12/600 PS Basics & Theory 1–117 • When the THI signals are compared after changing the sensitivity of the thermistor (see note 3 below) from the high range to the low range, there is almost no difference recognized (the wiring for the thermistor is broken). Notes: 1 If a failure occurs in the fuser heater, do not turn on the printer power switch for about 30 minutes.
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Color LaserWriter 12/600 PS Fuser Error B: Fuser Safety Circuit Detects Error Basics & Theory 1–118 The fuser heater safety circuit in the power supply unit will shut off the power supplied to the fuser heater if the fuser temperature rises abnormally.
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Color LaserWriter 12/600 PS Basics & Theory 1–119 The safety circuit IC (Z4) in the power supply unit monitors the fuser temperature detect signal (THI) sent to pin 14. If the voltage output from the thermistor becomes about 1.6 V with an increase in the fuser temperature, the safety circuit IC will set the output of pin 5 to “L” and turn off the relay (RL) to shut off the power supplied to the fuser heater.
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Color LaserWriter 12/600 PS Fuser Error C: Abnormality Detection Circuit Error Basics & Theory 1–120 Located in the power supply unit, the fuser abnormality detection circuit monitors the fuser assembly for voltage compatibility and fuser heater continuity: • Voltage compatibility. The fuser assembly abnormality detection circuit checks that the rated voltage of the power supply unit matches that of the fuser assembly.
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Color LaserWriter 12/600 PS Basics & Theory 1–121 Notes: 1 When starting the temperature control, the printer individually turns on the upper and lower fuser heaters and monitors them for breakage with the FXSTS signal.
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Color LaserWriter 12/600 PS Oil Circulation System Basics & Theory 1–122 In order to prevent the tracking of toner onto the fuser rollers, the printer uses an oil circulation system to lubricate the rollers. Note: Laser printer engines typically have fuser lubrication, but usually in the form of oil-impregnated rollers. Due to the high fusing temperature and the characteristics of the mono-component toner used in this printer, additional lubrication is required.
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Color LaserWriter 12/600 PS Basics & Theory 1–123 If the CPU on the DC controller detects that oil is low, it issues an oillow notice to the I/O controller. Approximately 50 sheets of paper can be printed before the CPU determines that oil has run out and stops the printer. The oil catch tray is equipped with an oil overflow sensor (PS10).
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Color LaserWriter 12/600 PS Fuser Cleaner Assembly Basics & Theory 1–124 The printer uses a cleaning assembly to clean the upper fuser roller. This assembly comprises a cleaning belt winding roller, a cleaning belt roller, and a rolled cleaning belt. After every seven prints, the cleaning belt winding roller rotates and the contact surface of the cleaning belt moves to clean the upper fuser roller.
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Color LaserWriter 12/600 PS Basics & Theory 1–125 Main Motor Drive Circuit Outline The main motor is a DC brushless motor controlled by the CPU on the mechanical controller and used to drive the loads peripheral to the transfer drum and the fuser/delivery unit.
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Color LaserWriter 12/600 PS Basics & Theory 1–126 Paper Jam Detection Outline The following paper sensors are provided to detect whether paper is present and whether the paper is fed normally: • PS301: Cassette paper-present sensor, located on the cassette pickup assembly board. • PS302: Paper registration sensor, located on the cassette pickup assembly board. • PS303: Paper leading-edge sensor, located on the cassette pickup assembly board.
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Color LaserWriter 12/600 PS Pickup Delay Jam Basics & Theory 1–127 The CPU determines that a pickup delay jam has occurred if the paper does not reach the registration paper sensor (PS302) within a specified period of time after the feed solenoid is engaged. (Unit: Second) (Unit: Second) PRINT PRINT Feed Solenoid (SL1, SL2, SL351) Jam Check Paper Leading Edge Sensor (PS303) T1 T2 T1 Normal T2 Abnormal Pickup Motor (M1) T1=0.83 (Cassette feed, Manual feed), 1.17 (Paper feeder) T2=2.
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Color LaserWriter 12/600 PS Paper Top Position Delay Jam Basics & Theory 1–128 The CPU determines that a paper top position delay jam has occurred if the paper does not reach the paper leading-edge sensor (PS303) within a specified period of time after the registration paper sensor (PS302) detects the leading edge of the paper. (Unit: Second) PRINT (Unit: Second) PRINT Paper Registration Sensor (PS302) Jam Check Paper Leading Edge Sensor (PS303) Approx. 0.53 Normal Approx. 0.
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Color LaserWriter 12/600 PS Grip Jam Basics & Theory 1–129 The CPU determines that a grip jam has occurred if the attraction sensor (PS6) does not detect the paper a specified period of time after transfer drum registration position detection (in the full-color mode, the registration position for the fourth color is detected). (Unit: Second) (Unit: Second) PRINT PRINT Registration Position Registration Position Transfer Drum Top Sensor (PS8) Jam Check Attraction Sensor (PS6) Approx. 1.48 Approx.
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Color LaserWriter 12/600 PS Separation Delay Jam Basics & Theory 1–130 The CPU determines that a separation delay jam has occurred if the paper does not reach the separation sensor (PS7) a specified period of time after transfer drum registration position detection (in the full-color mode, the registration position for the fourth color is detected).
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Color LaserWriter 12/600 PS Separation Stationary Jam Basics & Theory 1–131 The CPU determines that a separation stationary jam has occurred if the paper is detected by the separation sensor (PS7) a specified period of time after transfer drum registration position detection (in the full-color mode, the registration position for the fourth color is detected).
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Color LaserWriter 12/600 PS Delivery Delay Jam Basics & Theory 1–132 The CPU determines that a delivery delay jam has occurred if the paper does not reach the delivery paper sensor (PS9) a specified period of time after transfer drum registration position detection (in the full-color mode, the registration position for the fourth color is detected).
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Color LaserWriter 12/600 PS Delivery Stationary Jam Basics & Theory 1–133 The CPU determines that a delivery stationary jam has occurred if the paper does not pass through the delivery paper sensor (PS9) a specified period of time after transfer drum registration position detection (in the full-color mode, the registration position for the fourth color is detected).
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Color LaserWriter 12/600 PS Multifed Paper Stationary Jam Basics & Theory 1–134 The CPU determines that a multifed paper stationary jam has occurred if the delivery paper sensor (PS9) detects paper a specified period of time after transfer drum registration position detection (in the full-color mode, the registration position for the fourth color is detected).
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Color LaserWriter 12/600 PS Nondedicated Transparency Jam Basics & Theory 1–135 The CPU determines that a nondedicated transparency jam has occurred if one of the following is sensed: • The white band on the leading edge of the transparency is not detected by the paper leading-edge sensor (PS303) a specified period of time after it is detected at the transfer drum registration position. • The white band is detected after a specified time subsequent to that.
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Color LaserWriter 12/600 PS Wrong Paper Length Feed Jam Basics & Theory 1–136 The CPU detects the paper size with the paper leading-edge sensor (PS303). It determines that a wrong paper size feed jam has occurred if it detects paper shorter than 9.05" (230 mm) or longer than 14.96" (380 mm). 95.08.23.11.
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Color LaserWriter 12/600 PS Initial Residual Jam Basics & Theory 1–137 The CPU determines that an initial residual jam has occurred under the following two conditions: • If any of the following sensors detects the paper a specified period of time (0.5 or 2.
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Color LaserWriter 12/600 PS Basics & Theory 1–138 VI. System Interface 95.08.23.11.
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Color LaserWriter 12/600 PS Basics & Theory 1–139 Outline The I/O controller in the printer converts the print data sent by external devices, including the host computer, into dot data, which is then output from the I/O controller to the DC controller. The types of interface signals transmitted between the I/O controller and the DC controller, as well as an outline of the operation of the printer using the interface signals, are described below. External Device (Host Computer, etc.
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Color LaserWriter 12/600 PS Basics & Theory 1–140 Video Interface I/O Interface Signals The I/O interface signals are as illustrated below. I/O Controller Board /LSYNC /PPRDY /RDY /TOP /SBSY /STS /CBSY /PRNT /CPRDY VCLK /IMCHR /VDO7 /VDO6 /VDO5 /VDO4 /VDO3 /VDO2 /VDO1 /VDO0 /CMD /CCLK DC Controller Board Description of Operation When power is turned on, the printer enters the wait state.
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Color LaserWriter 12/600 PS Basics & Theory 1–141 The DC controller generates 8-bit video data signals (DV2-DV9) in accordance with the video signals (VDO0-VDO7) sent by the I/O controller, and then sends them to the PWM-IC in the laser/scanner assembly. The laser drive circuit turns the laser diode on and off in accordance with the laser drive signal (internal signal in the laser/scanner assembly) output from the PWM-IC, to generate the modulated laser beam.
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Color LaserWriter 12/600 PS Basics & Theory 1–142 VII. Power Supply 95.08.23.11.
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Color LaserWriter 12/600 PS Basics & Theory 1–143 Outline The power switch uses a remote switch method. When the power switch (SW1) is turned on, the DC controller is informed of this by the power supply circuit. The DC controller turns on the control IC in the power supply circuit, and the AC power supply is sent to the power supply circuit via the circuit breaker, the noise filter, etc.
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Color LaserWriter 12/600 PS Basics & Theory 1–144 When the front door, the fuser access cover, and the pickup cover are closed, the door switch (SW2) is automatically turned on and the power supply is sent to the driving loads. This circuit also supplies +24 VDC and +5 VDC, which are required for the printer itself. The +24 VDC is supplied for the motors, the exhaust fans, the clutches and other driving components, as well as for the cassette pickup board and the high-voltage power supply board.
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Color LaserWriter 12/600 PS Basics & Theory 1–145 Remote Switch When the power switch on the printer is turned off, the power supply circuit sets the power off signal (POFF) sent to the DC controller to “H.” When the printer is subsequently ready to be turned off, the DC controller sets the power off control signal (PCONT) to “L.” This stops the switching regulator for the power supply circuit and turns off the printer.
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Color LaserWriter 12/600 PS Basics & Theory 1–146 VIII. Sheet Feeder 95.08.23.11.
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Color LaserWriter 12/600 PS Basics & Theory 1–147 Outline of Electrical Circuit The sheet feeder is electrically controlled by the sheet feeder controller board in the sheet feeder. This board provides serial communications with the mechanical controller in the printer and outputs signals to drive the loads of the motors and the solenoids. The power supply for the sheet feeder consists of +24 VDC generated by the internal power source and +5 VDC supplied by the printer.
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Color LaserWriter 12/600 PS Basics & Theory 1–148 Sheet Feeder Controller Board Input/Output 5V J352-3 OPFEDSNS -2 PS352 Pickup Sensor PS351 Cassette Paper Present Sensor P S SL351 5V J352-6 OPSNS -5 Cassette Feed Solenoid J354-1 Sheet Feeder Motor J353-2 -3 -4 -5 -6 M6 Sheet Feeder Controller Board "H" when paper is available. "H" when no paper is available. +24V OPFED CA CB AO /AO BO /BO "L," the SL351 is turned on to rotate the pickup roller.
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Color LaserWriter 12/600 PS Basics & Theory 1–149 Pickup/Feed System Outline The sheet feeder pickup roller is driven by the sheet feeder motor (M6). The sheet feeder motor is controlled by the sheet feeder motor driver IC on the sheet feeder controller board. The cassette pickup solenoid is controlled by the sheet feeder driver IC on the sheet feeder controller board. Pickup Operation When the print sequence command is received, the mechanical controller in the printer rotates the main motor (M2).
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Color LaserWriter 12/600 PS Basics & Theory 1–150 Power Supply The power supply for the sheet feeder consists of +24 VDC generated by the internal power source and +5 VDC supplied by the printer. The power source in the printer uses a remote switch. The CPU in the sheet feeder controller board outputs the REMOTE signal to the power source in accordance with a command from the printer and turns the power supply on or off.
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2 Troubleshooting 98.05.08.09.
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Color LaserWriter 12/600 PS Troubleshooting 2–2 Using This Chapter This chapter is divided into four sections. I Preparation and Tips This section contains troubleshooting checklists, list of recommended tools, circuit diagrams, and tips. If you are working on a Color LaserWriter 12/600 PS for the first time, please take time to read the topic “Verifying Printer Operation.” This topic discusses how to place the printer in an open operational state.
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Color LaserWriter 12/600 PS I. Troubleshooting 2–3 Preparation and Tips 98.05.08.09.
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Color LaserWriter 12/600 PS Troubleshooting 2–4 Troubleshooting Checklist Before troubleshooting the printer, make sure that you have checked the following items in the order in which they are listed. 1 Make sure that the printer is on a flat, sturdy surface and that it is isolated from vibrations, direct sunlight, or environmental conditions that do not meet specification. Caution: It is extremely important that the printer be on a perfectly level surface.
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Color LaserWriter 12/600 PS Troubleshooting 2–5 Tools Required The following tools are required for servicing the Color LaserWriter 12/600 PS printer: • PowerBook computer with AppleTalk connectors • Color LaserWriter Service Utility with diagnostic interface cable • Digital multimeter • Phillips screwdriver (various sizes) • Medium size flat-blade screwdriver • Precision flat-blade screwdriver set • Needle-nose pliers • Cotton gloves (for use with transfer drum) • Extraction syringe (for use with the f
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Color LaserWriter 12/600 PS Troubleshooting 2–6 Verifying Printer Operation To observe an operational engine, place the printer into the validation state described below. (Refer to the Take Apart chapter for instructions on performing the “First” procedures). The validation state is also the point in reassembly where you should verify printer operation. First Remove the top cover, left cover, rear cover, rear shield plate and fuser access cover.
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Color LaserWriter 12/600 PS Troubleshooting 2–7 The printer in validation state is its own best instructional and training aid. When you first have an operational printer in this state, observe as much as you can, paying special attention to the following. Door Switch Before you turn on power, open and close the doors and observe how the door switch cam assembly works. Only when all three doors are closed will the door switch be pressed.
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TH TP2 H2 H1 2 1 J28M J28F J22 3 2 1 J29 3 2 1 SW1 1 2 3 4 5 6 J21M J21F 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 10 10 11 11 12 12 13 13 14 14 15 15 16 16 J63F 2 1 RMT CMN 3 2 1 J6F 5VSAVE GND POUT 5VSAVE GND OILFUL 6 5 4 3 2 1 1 2 J6M 3 THI GND /FXSNS GND FXTYP FXRET 6 5 4 3 2 1 1 2 3 J64M /WEBSLON 24VA J622 3 TNSNS 2 GND 1 RET FFC 15P(1.
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J360 J362 Power Supply J361 J355 SW302 Right-Door Switch SL SW301 Side Registration Adjustment Switch J354 Cassette Feed Solenoid SL351 M Sheet Feeder Controller Board J353 1 2 J359 J312 J356 J352 Cassette Paper Sensor PS351 J358 Pickup Sensor PS352 Cassette SizeSensing Switch 1 2 3 Paper Feeder Motor M6 6 5 4 3 2 1 /BO BO /AO AO CB CA 4 3 1 2 3 4 6 5 4 3 2 1 OPSNS GND5 LED2 OPFEDSNS GND5 LED1 2 1 +24VA /OPFED +24V-BS +24V-GND REMOTE-GND REMOTE 1 2 3 4 4 3 2 1 GND /CSIZE301 /CSIZE3
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Color LaserWriter 12/600 PS Troubleshooting 2–10 Roller Diameters General Horizontal print defects that occur repetitively over a single page are almost always caused by dirty or damaged rollers. By measuring the tracks on the page and noting the side of the page that the tracks are on, you can isolate horizontal defects to a specific roller within the printer. The following chart shows the major rollers within the printer and the kinds of defects caused by them.
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Color LaserWriter 12/600 PS II. Troubleshooting 2–11 Startup Tests and Diagnostics 98.05.08.09.
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Color LaserWriter 12/600 PS Troubleshooting 2–12 Startup Tests When you switch on power, all the status panel lights illuminate briefly. This confirms that power is getting to the status panel and that all LEDs are operational. The lights then extinguish and the four primary lights come back on. This marks the start of the Power-On Self-Test (POST). POST is a set of diagnostic procedures that are written into firmware on the I/O controller board. POST occurs during normal printer startup.
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Color LaserWriter 12/600 PS Extended POST (EPOST) Troubleshooting 2–13 Some error conditions that stop printer operation cannot be detected within the short period of time that POST runs. When this occurs, the status panel flashes all four primary lights. POST/Undetected Error To identify the specific error condition that is causing the “all flashing” array, you must restart the printer under Extended POST (EPOST).
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Color LaserWriter 12/600 PS Troubleshooting 2–14 POST Codes Matrix = Flashing POST error arrays can occur during normal printer operation. Therefore, customers can observe an array and describe it to you, even though they will not know its significance. Important: An error designation does not necessarily mean that the named module is defective—it means that something along the functional path is defective. Please refer to "POST Codes Notes" later in this topic for more information.
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Color LaserWriter 12/600 PS Troubleshooting 2–15 ! EPOST Codes Matrix (1 of 2) = Flashing (With Test Plug) Extended POST (EPOST) reports the errors shown in "POST Codes Matrix" plus all the errors shown below and on the next page. Note that EPOST consumable and jam errors do not necessarily correspond to status panel readouts during normal operation.
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Color LaserWriter 12/600 PS Troubleshooting 2–16 ! EPOST Codes Matrix (2 of 2) = Flashing (With Test Plug) Toner Lights ! Access Lights Maintenance Lights Error Designation + (none) + 6 + (none) Pickup Block Door Jam + (none) + 7 + (none) Front Door Jam + (none) + 2 + (none) Fuser Door Jam + (none) + 1 + (none) Top Access Door Jam + (none) + 6, 8, 9 + (none) Pre-Registration Jam + (none) + 6, 8, 9 + (none) Leading Edge Jam + (none) + 1, 6, 7 + (none
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Color LaserWriter 12/600 PS POST Codes Notes Troubleshooting 2–17 The notes below correspond to the “POST Codes Matrix” earlier in this topic. “Over the phone” denotes actions that you can ask a customer to take to help you isolate faults remotely. “On site” denotes actions you take after you have arrived. Important: DC controller or mechanical controller boards are the intelligence centers of the printer. POST errors in some cases can be caused by a fault in one of these boards.
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Color LaserWriter 12/600 PS Troubleshooting 2–18 If the connectors are secure, remove the fuser assembly and measure continuity between pins 1 and 2 and then between pins 3 and 4 on the fuser assembly. J21-1 J21-2 Receptacle connector on back of fuser assembly (removed from printer) J21-3 J21-4 A lack of continuity at either point indicates that the fuser heater circuitry is broken, in which case you should replace the fuser assembly. If continuity is confirmed, replace the power supply.
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Color LaserWriter 12/600 PS Movie Troubleshooting 2–19 If you do not have a mirror, you can remove the two screws and the black trim piece above the fuser roller opening to get a partial direct view of the actuator. The movie to the left is taken from this view, and shows an actuator in the up position being pressed with the tip of a jeweller’s screwdriver. If the flag is up, then oil is filling the pan. Replace the fuser assembly.
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Color LaserWriter 12/600 PS Note 10 Troubleshooting 2–20 The DC controller has detected incorrect timing at carousel position sensor PS4. This is consistent with a jammed carousel. Over the phone, ask if the printer has been on-line yet. If it has not, the problem is likely in initial setup, most likely in the handling of the toner cartridges. Make sure that the customer has removed the sealing tape from each cartridge and that the cartridges are correctly installed.
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Color LaserWriter 12/600 PS Troubleshooting 2–21 Note 14 The DC controller has detected an I/O controller fan error. On site, remove J2010 from the mechanical controller board and reconnect it. Test the printer. If the problem persists, replace the I/O controller fan Note 15 The DC controller has detected a fuser fan error. On site, remove J2012 from the mechanical controller board and reconnect it. Test the printer. If the problem persists, replace the fuser fan.
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Color LaserWriter 12/600 PS Troubleshooting 2–22 Diagnostic Utility Outline The Color LaserWriter Service Utility is a stand-alone application for the Macintosh that lets you upload and download printer parameters from the DC controller board. You connect your Macintosh to the printer’s I/O Test (IOT) connector by means of the utility interface cable (P/N 922-1703). The IOT connector is J109 on the DC controller board.
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Color LaserWriter 12/600 PS Troubleshooting 2–23 III. Flowchart Troubleshooting 98.05.08.09.
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Color LaserWriter 12/600 PS Troubleshooting 2–24 Flowchart A START Switch on the printer. Do any fans/motors/LEDs come on indicating that power is getting into the printer? NO Go to Flowchart B YES Does the ready light illuminate steadily after 3-4 minutes? NO NO YES Are any of the secondary lights illuminating or flashing? YES Are the paper-out and paperjam lights flashing? YES See "POST" in this chapter.
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Color LaserWriter 12/600 PS Troubleshooting 2–25 Flowchart B No power is getting into the printer. Make sure that the line voltage is present and that the printer is plugged in. Did the problem first appear following take apart and reassembly of the printer? NO YES Check the following connectors and make sure they are securely attached. • The connector on each side of the transit coupling behind the power supply. • Connector J4 and J6 at the power supply.
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Color LaserWriter 12/600 PS Troubleshooting 2–26 Flowchart C Power is getting into the printer but the printer isn't coming ready. Is there a very loud grinding sound coming from the carousel? YES See "Symptom-Driven Troubleshooting" in this chapter. NO Do all 21 status panel lights come on and stay on? YES This indicates that the I/O controller board is not installed or is failing.
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Color LaserWriter 12/600 PS Troubleshooting 2–27 Flowchart D The printer comes ready but secondary lights are illuminating. YES Is the fuser assembly light or the fuser oil light illuminating? These lights come on to alert the user to order a replacement part. The fuser assembly light comes on when cleaning belt sensor (PS5) is tripped. At that point the DC controller allows 500 more prints to occur before stopping printer operation, at which time you must replace the fuser assembly.
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Color LaserWriter 12/600 PS Troubleshooting 2–28 Flowchart E The printer came ready but did not print the startup page(s). The startup page and/or the demo page might be disabled through the Apple Printer Utility (under the "Printer Preferences heading).. Enable the startup page and restart the printer. Does the printer deliver the startup page? YES Go to E on Flowchart A. NO Go to E on Flowchart C. 98.05.08.09.
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Color LaserWriter 12/600 PS Troubleshooting 2–29 Flowchart F The printer comes ready and prints the startup page(s) okay, but there is a problem printing from the host computer. YES Is the size and type of paper the same as what the startup page printed on? If you have a PowerBook, connect it to the printer and issue a Print Window command from the Finder (the last item in the File menu). If this prints, then the problem is external to the printer, in either networking connections or host software.
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Color LaserWriter 12/600 PS Troubleshooting 2–30 IV. Symptom-Driven Troubleshooting 98.05.08.09.
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Color LaserWriter 12/600 PS Troubleshooting 2–31 Miscellaneous Issues 1 The front door opens too easily. When you open and close the front door with the power on, the DC controller assumes that you have opened the door to clear a jam, and drives the cleaning brush to remove scattered toner. This causes a delay. If you want to tighten the door so that you do not open it inadvertently, perform the “Front Door Latch Adjustment” procedure in the Take Apart chapter. 2 High-voltage power plays an extra role.
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Color LaserWriter 12/600 PS Troubleshooting 2–32 6 Printer empties paper tray of paper. Output is blank. Restart the printer and check the calibration patches (as they are printed on the drum, see Troubleshooting/Verifying Operation/Imaging) by opening the top of the printer. If the patches are bands of toner extending across the drum, replace the Laser/Scanner unit. 98.05.08.09.
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Color LaserWriter 12/600 PS Troubleshooting 2–33 Print Quality Issues This topic addresses general print quality defects that can occur in the Color LaserWriter 12/600 PS. Since color quality is largely subjective and some nuances are nearly impossible to describe, we encourage you to familiarize yourself with all the general issues covered in this topic. To learn general principles of color theory, go to the “Interactive Color 1.6” folder that is bundled on Service Source CD.
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Color LaserWriter 12/600 PS Troubleshooting 2–34 To minimize this effect, try to avoid large flat areas of color, as they will most readily reveal this type of banding, and keep the printer away from machinery that might cause excessive vibration. In addition, take care in maintaining the printer and in keeping it clean and level. Banding caused by mechanical processes can be remedied. See the print quality issue below. 4 There is a repetitive horizontal defect on my pages.
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3 Take Apart 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–2 List of Procedures General The following pages describe take-apart procedures for the Color LaserWriter 12/600 PS. Listed below are the procedures in the order in which they appear in this chapter. This list is primarily for the benefit of those who have printed this documentation. If you are viewing this in Acrobat format from a computer screen, you may navigate by bookmarks.
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Color LaserWriter 12/600 PS Take Apart 3–3 About Solenoids .............................................................................................. 3–91 Cleaning Belt Drive Solenoid ..................................................................... 3–92 Solenoid Assembly..................................................................................... 3–93 Delivery Drive Assembly ................................................................................
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Color LaserWriter 12/600 PS Take Apart 3–4 Toner Disposal Box (page 1 of 3) First No first steps are required. Note: This part is available as P/N 922-1546. Two toner disposal boxes are also included in Photoconductor Replacement Kit (Finished Goods P/N M3761G/A). 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–5 Toner Disposal Box (page 2 of 3) Now 1 Open the front door. Lower the transfer drum lever and raise the disposal box cover. Disposal Box Cover Transfer Drum Lever 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–6 Toner Disposal Box (page 3 of 3) 2 Pull the toner disposal box from the printer. Remove the black plastic cap in the side of the disposal box and use it to seal the box. Toner Disposal Box Important: There is a small safety that drops when you remove the disposal box. Lift this safety before closing the disposal box cover. Do not force the cover shut when the box is absent. 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–7 Photoconductor Cartridge (page 1 of 2) First Remove the toner disposal box and toner cartridges. WARNING: When you install a new photoconductor, the DC controller board automatically zeros the parameter that tracks photoconductor life. Pulling out a new cartridge and reinstalling the old one may result in an old cartridge being treated as new.
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Color LaserWriter 12/600 PS Take Apart 3–8 Photoconductor Cartridge (page 2 of 2) Now Place the end of the photoconductor tray on the V-shaped entrance to the photoconductor compartment. Release the green tab on the right edge of the cartridge. Slide the cartridge into the tray, making sure that the tabs on the cartridge track snugly along the top edges of the tray. Photoconductor Cartridge Photoconductor Tray Green Tab 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–9 Fuser Access Cover (page 1 of 2) First Now No first steps are required. 1 Open the front door and the door to the paper pickup area. Open the fuser access cover, and remove the tab that connects the fuser door strap to the chassis. 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–10 Fuser Access Cover (page 2 of 2) 2 Slide the fuser access cover leftward out of its hinge connector and remove the cover from the printer. 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–11 Fuser Oil Bottle (page 1 of 2) First No first steps are required. Now Open the front door and lower the clamp that covers the fuser oil compartment. Lift the fuser oil bottle from the printer. Fuser Oil Bottle Oil Bottle Clamp 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–12 Fuser Oil Bottle (page 2 of 2) Note: There is a mechanism in the lid of the bottle that automatically cuts off flow of oil when the bottle is removed from the printer. However, some oil might still drip. Be sure to keep the bottle upright and protected by a paper towel as you continue servicing the printer. If any fuser oil spills on the floor, clean it up immediately. The oil is very slippery on hard surfaces. 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–13 Fuser Assembly (page 1 of 3) First Now Remove the fuser access cover and fuser oil bottle. Open the pickup block door if it is not already open. 1 Loosen the two large locking screws at the base of the fuser assembly. These screws do not come off. 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–14 Fuser Assembly (page 2 of 3) 2 Grasp the two knobs and slide the fuser assembly outward. Knobs 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–15 Fuser Assembly (page 3 of 3) 3 Grasp the two green handles and remove the fuser assembly from the printer. Important: If you are replacing the fuser assembly, perform the “Fuser Oil Extraction” procedure that follows this topic. 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–16 Fuser Oil Extraction (page 1 of 5) First Remove the fuser access cover, fuser oil bottle, and fuser assembly. General Description: Residual oil remains in the fuser assembly after removal of the assembly from the printer. If you are replacing the fuser assembly, you must extract this oil with a syringe and then seal the oil reservoir before returning the assembly to Apple. Note: One syringe and a sealing block come with the replacement fuser assembly.
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Color LaserWriter 12/600 PS Take Apart 3–17 Fuser Oil Extraction (page 2 of 5) Under normal conditions, you need only extract the oil from the reservoir itself. Step 1 describes the process of extracting oil from the reservoir. When the control panel lights indicate an oil pump error (see “PowerOn Self Test” in Chapter 2), an oil-overflow condition is deemed to exist. In this case, you must also extract oil from the well leading to the oil overflow pan. Steps 2 and 3 describe this procedure.
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Color LaserWriter 12/600 PS Take Apart 3–18 Fuser Oil Extraction (page 3 of 5) Now Extraction from the oil reservoir: 1 Place the tip of the syringe into the oil at the bottom of the reservoir and draw the oil into the syringe. Inject the oil into the reservoir of the replacement fuser assembly. Repeat this step until there is no residual oil left in the bottom of the reservoir. Stopper the reservoir on the old assembly with the sealing block that is provided. Oil Reservoir 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–19 Fuser Oil Extraction (page 4 of 5) Extraction from the overflow pan: An oil overflow condition is sensed when a float-type actuator in the overflow pan breaks the photo-interrupter of sensor PS10. The oil that is buoying the actuator can be extracted from the overflow pan though a well located on the delivery side of the fuser assembly. 2 Elevate the gear end of the fuser assembly so that oil flows toward the well. Remove the well cover and well cap.
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Color LaserWriter 12/600 PS Take Apart 3–20 Fuser Oil Extraction (page 5 of 5) 3 Insert the syringe into the center ring of the well and draw the oil into the syringe. Repeat this step until there is no residual oil left in the overflow pan. Replace the well cap and well cover. 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–21 Paper Pickup Block Removal (page 1 of 2) First No first steps are required. This procedure covers the removal of the pickup block from the printer. The “Paper Pickup Block Disassembly” topic that follows this topic describes the breakdown of the pickup block into its subassemblies. Now 1 Open the front door and pickup block cover. Release the green lock levers at each side of the pickup block and slide the block out. Lock Lever Lock Lever 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–22 Paper Pickup Block Removal (page 2 of 2) 2 Remove the two silver-colored screws and metal stoppers and remove the pickup block from the printer. Left Stopper and Screw Right Stopper and Screw 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–23 Paper Pickup Block Disassembly (page 1 of 11) First Remove the paper pickup block. The paper pickup block consists of about a dozen parts, the two major ones being the cassette pickup assembly and multipurpose pickup assembly. Perform this procedure if you need to break down the pickup block into these two assemblies. 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–24 Paper Pickup Block Disassembly (page 2 of 11) Grounding Spring Multipurpose Pickup Assembly Motor Cover Pickup Block Cover Cassette Pickup Assembly Paper Pickup Block Door-Closing Spring 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–25 Paper Pickup Block Disassembly (page 3 of 11) Now 1 Remove the door-closing spring and the grounding spring from the paper pickup block. Note: These two tension springs are not a part of either of the two pickup assemblies, but are available as part of the paper pickup block kit (P/N 076-0500). Grounding Spring Door-Closing Spring 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–26 Paper Pickup Block Disassembly (page 4 of 11) 2 Open the manual feed tray and remove the three black screws that secure the pickup block cover to the pickup block. 1 2 3 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–27 Paper Pickup Block Disassembly (page 5 of 11) 3 The pickup block cover is held in place by two posts at the bottom of the pickup block and four positioning pins along the top edge of the block. Shift the pickup block cover upward to clear the positioning pins, thread the door lever though the opening, and remove the cover from the pickup block. Positioning Pins Door Lever Pickup Block Cover Note: The pickup block cover is available as P/N 922-1305.
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Color LaserWriter 12/600 PS Take Apart 3–28 Paper Pickup Block Disassembly (page 6 of 11) 4 Separate the width guide from the multipurpose tray by flexing the guides and releasing the two pins. Deflect the multipurpose tray to release its hinge pin and remove the tray from the pickup block. Lower the width guide to its maximum and slide it off the pickup block. Width Guide Multipurpose Tray 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–29 Paper Pickup Block Disassembly (page 7 of 11) 5 Remove the two brass-colored screws that secure the trim cover to the pickup block. There are three slider tabs on the trim cover that mate into the bottom edge of the pickup block frame. Pull the trim cover out and down to clear the tabs and remove the cover from the pickup block. 1 2 Pickup Trim Cover 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–30 Paper Pickup Block Disassembly (page 8 of 11) 6 Remove the E-ring that secures the hinge arm to the multipurpose pickup assembly. Unpin the hinge arm from the multipurpose pickup assembly. E-Ring 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–31 Paper Pickup Block Disassembly (page 9 of 11) 7 Remove the two brass-colored screws and remove the motor cover from the cassette pickup assembly. Motor Cover 1 2 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–32 Paper Pickup Block Disassembly (page 10 of 11) 8 Disconnect the two connectors from the transit couplings and free the cables from the two clamps. Transit Couplings Cable Clamps 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–33 Paper Pickup Block Disassembly (page 11 of 11) 9 Remove the silver-colored screw that secures the small pivot mount to the front left edge of the pickup block. Slide the mount off the block. While carefully holding the pivot mount spring in place, separate the cassette pickup assembly from the multipurpose pickup assembly.
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Color LaserWriter 12/600 PS Take Apart 3–34 Cassette Pickup Assembly Perform the “Paper Pickup Block Disassembly” procedure. After splitting the pickup block as described in that procedure, the cassette pickup assembly is one of the parts that remains. Note that the following pieces are not contained in the cassette pickup assembly: • Pickup motor cover (P/N 922-1323).
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Color LaserWriter 12/600 PS Take Apart 3–35 Multipurpose Pickup Assembly (page 1 of 2) First Remove and disassemble the paper pickup block. After splitting the pickup block as described in the “Paper Pickup Block Disassembly” topic, the only task remaining is the removal of the pickup assembly cover. This cover is not a part of the multipurpose pickup assembly, but is available separately as P/N 922-1324. It is held in place by two C-shaped claws that grip the metal shaft beneath the cover. 95.08.23.
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Color LaserWriter 12/600 PS Take Apart 3–36 Multipurpose Pickup Assembly (page 2 of 2) Now With a flat-blade screwdriver, pry the claws free of the shaft and remove the cover from the multipurpose pickup assembly. Pickup Assembly Cover C-Shaped Claw (1 of 2) 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–37 Cassette Pickup Assembly Board (page 1 of 4) First Remove the paper pickup block. The cassette pickup assembly board is a part of the cassette pickup assembly but is also available separately as P/N 922-1311. All functions of the paper pickup block route through this board. This board contains the photo-reflectors for the cassette paper-present sensor PS301 and paper leading-edge sensor PS303, and the photo-interrupter for paper registration sensor PS302.
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Color LaserWriter 12/600 PS Take Apart 3–38 Cassette Pickup Assembly Board (page 2 of 4) 2 Remove the three silver-colored screws that secure the shield to the pickup block and lift the shield from the block. 2 Shield 1 3 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–39 Cassette Pickup Assembly Board (page 3 of 4) 3 Disconnect J301 from the pickup board and remove the two silvercolored screws that secure the receptacle bracket to the pickup block. Remove the bracket and cable from the pickup block. J301 1 2 Receptacle Bracket 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–40 Cassette Pickup Assembly Board (page 4 of 4) 4 Disconnect connectors J302, J303, and J304 and remove the two silvercolored screws. Carefully remove the board from the pickup block. Note: Do not disconnect J305 from the pickup assembly board. J305 connects to a small daughterboard on which the photo-reflector for paper leading-edge sensor PS303 is mounted. This small board is a part of the cassette pickup assembly board (P/N 922-1311).
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Color LaserWriter 12/600 PS Take Apart 3–41 I/O Controller Board (page 1 of 2) First Now No first steps are required. 1 Loosen the two captive screws and slide the I/O controller board from the printer. Note: If you are removing the I/O controller board to get to a deeper part, stop here. If you are replacing the board, proceed to step 2. 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–42 I/O Controller Board (page 2 of 2) A replacement I/O controller board comes without SIMMs and without the I/O bracket. If you are replacing a board, remove the SIMMs from the old board and install them onto the new board. If the board you are replacing had v. 1.0 ROMs, copy the “LaserWriter Color 12/660” PPD into the customer’s Printer Description folder. For more information, see “Driver Software” in the “CLW 12/660” chapter.
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Color LaserWriter 12/600 PS Take Apart 3–43 Air Filter (page 1 of 2) First No first steps are required. Note: This part is available as P/N 922-1307. It also comes with the Fuser Replacement Kit (Finished Goods P/N M3867G/A for 110 V and M4234G/A for 220 V). Now 1 Press down slightly on the top of the filter cover, pull it outward, and remove it from the printer. 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–44 Air Filter (page 2 of 2) 2 Unlock and remove the air filter from the cover. 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–45 Ozone Filter (page 1 of 2) First Now No first steps are required. 1 Press down slightly on the top of the filter cover, pull it outward, and remove it from the printer. 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–46 Ozone Filter (page 2 of 2) 2 Grasp the tab on the ozone filter and slide the filter from its slot behind the fuser fan. Ozone Filter 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–47 Front Door First No first steps are required. Now Open the front door and remove the brass-colored screw that holds the support strap to the door. Lift the front door upward off its hinge plates and remove it from the printer. Screw Strap Upper Hinge Plate Lower Hinge Plate 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–48 Front Door Latch Adjustment First Open the pickup block door. After prolonged use or directly following shipment of the printer, the front door latch may get out of alignment just enough to prevent tight closure. If this has occurred, perform the following procedure: Now Locate the positioning screws on the front door latch.
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Color LaserWriter 12/600 PS Take Apart 3–49 Top Cover (page 1 of 5) First Now No first steps are required. 1 Open the front door. Open the fuser access cover and remove the two brass-colored screws that secure the top cover to the printer chassis. 1 2 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–50 Top Cover (page 2 of 5) 2 Open the top access door, release the small tab by gently pulling it upward, and slide the black arm off its pin. Top Access Door Tab Pin 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–51 Top Cover (page 3 of 5) Important: There are three hidden claws at the left end of the top cover. In the step on the next page you will unseat these claws, raise the left end of the top cover, and remove the cover from the printer. Do not attempt to raise the fuser end of the cover first—you will damage these claws if you do. Claws Claw Locator 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–52 Top Cover (page 4 of 5) Movie 3 Reach across the top cover and hold your left thumb on the upper front door hinge plate and your right thumb on the I/O controller bracket screw. Pull firmly against the edge of the top cover to release the three claws and lift the cover from the printer. Replacement Note: Apply even pressure along the left edge of the cover and make sure that the three claws are securely seated. 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–53 Top Cover (page 5 of 5) Note: The four frames below are from the movie on the previous page and are for the benefit of those who have printed out this topic. 1 2 3 4 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–54 About Inner Panels General The dark gray face of the front chassis wall is actually composed of four separate interlocking panels. Take-apart procedures for each follows this topic. The diagram below identifies each of the four. Toner Carousel Guide Panel Transfer Drum Panel Inner Panel 1 Inner Panel 2 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–55 Inner Panel 1 First Remove the top cover. Note: Inner panel 1 is the plastic molding in the upper right portion of the front chassis wall. Now Remove the brass-colored screw and remove inner panel 1 from the printer. Screw Inner Panel 1 Replacement Note: Make sure not to pinch the cables. 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–56 Inner Panel 2 First No first steps are required. Note: Inner panel 2 is the plastic molding in the lower right portion of the front chassis wall. Now Remove the brass-colored screw (the second screw up from the bottom right corner). Insert a flat-blade screwdriver near the bottom of the transfer drum lever and pull inner panel 2 from the printer. Inner Panel 2 Screw Transfer Drum Lever 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–57 Transfer Drum Panel First Remove the toner disposal box, top cover, inner panel 1, and inner panel 2. Note: The transfer drum panel is the plastic molding on the front chassis wall that covers the end of the transfer drum. Now Raise the disposal box cover and remove the four brass-colored screws. Lower the transfer drum lever and remove the transfer drum panel from the printer. Disposal Box Cover Transfer Drum Panel 1 2 3 4 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–58 Toner Carousel Guide Panel First Remove the top cover and inner panel 1. Now Remove the five brass-colored screws and the strap and remove the panel from the printer. 3 4 5 Strap Toner Carousel Guide Panel 2 1 Replacement Note: Make sure that the panel nests over the two ears of the green stopper disk and does not pinch the cables behind the panel. Important: This panel must be reinstalled before loading toner cartridges. 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–59 Left Cover First Remove the top cover. Now Remove the two silver-colored screws that secure the left cover frame to the chassis. Lift the left cover upward and remove it from the printer. 1 2 Claws Left Cover Replacement Note: Position the five claws into the cutouts in the chassis and lower the cover until it seats securely in place. 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–60 Rear Cover First Remove the top cover and left cover. Now Release the two tabs at the upper corners of the rear cover and remove the cover from the printer. Tab Rear Cover Claws Tab Replacement Note: Position the four claws into the cutouts at the bottom of the chassis before installing the cover over the shield plate. 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–61 Rear Shield Plate First Remove the top cover, left cover, and rear cover. Now Remove the nine silver-colored screws that secure the rear shield plate to the chassis. Lift the shield plate and remove it from the printer. 1 2 3 4 Rear Shield Plate 5 6 9 8 Tabs 7 Replacement Note: The two metal tabs at the bottom of the shield plate nest over the edge of the chassis frame. 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–62 Separation Discharge Assembly First Now No first steps are required. 1 Open the front door and the top cover. 2 Release the tab, press the assembly slightly to the right, and remove the assembly from the printer. 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–63 Status Panel Bottom Cover First No first steps are required. Now Open the front door. Carefully release the two tabs and slide off the status panel bottom cover. Caution: These tabs are very delicate—do not apply too much force. Status Panel Bottom Cover Tabs 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–64 Status Panel First Remove the status panel bottom cover. Now Carefully release the four flex-type tabs and disconnect the ribbon cable. Remove the status panel from the printer. Tabs Status Panel 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–65 Main Motor First Remove top cover, left cover, rear cover, and rear shield plate. Now Disconnect J2013 from the mechanical controller board. Remove the four silver-colored screws and remove the motor from the printer. Main Motor 1 2 3 J2013 4 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–66 About Fans General There are three exhaust fans in the Color LaserWriter 12/600 PS. Takeapart procedures for each immediately follow this topic. The role of each fan is as follows: 1 Fuser fan (FM1): Exhausts air from behind the fuser assembly. 2 Main fan (FM2): Exhausts air from the area around the DC controller board and laser/scanner assembly. 3 I/O controller fan (FM3): Exhausts air from the I/O board housing.
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Color LaserWriter 12/600 PS Take Apart 3–67 Fuser Fan (FM1) (page 1 of 2) First Now Remove top cover, left cover, rear cover, and rear shield plate. 1 Disconnect J2012 from the mechanical controller board. If you are simply replacing the fan, release the two flex-type tabs and remove the fan from the printer. If you are removing the fan to get to a deeper part, proceed to step 2. Fuser Fan Tab Tab J2012 Replacement Note: Install the fan with the vendor label facing out. 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–68 Fuser Fan (FM1) (page 2 of 2) 2 Disconnect J2008 and J2009 from the mechanical controller board and remove the cables from the cable guide in the fan duct. Remove the brass-colored screw, slide the fan and duct to the left to clear the hidden claw, pull the fan and duct from the printer. Screw Cables to J2008 and J2009 Cable Guide 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–69 Main Fan (FM2) (page 1 of 3) First Now Remove the top cover, left cover, rear cover, and rear shield plate. 1 If you are replacing a faulty fan, disconnect J2019 from the mechanical controller board, release the two tabs, and remove the fan. If you are removing the fan to get to a deeper part, begin at step 2. J2019 Tab Main Fan Tab Replacement Note: Install the fan with the vendor label facing out. 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–70 Main Fan (FM2) (page 2 of 3) Note: For clearance purposes, you must loosen the I/O board housing so that you can perform step 3. 2 Remove the four rearmost screws that secure the I/O board housing to the chassis. Raise the I/O board housing slightly and hold it while you performing the next step. I/O Board Housing 3 4 1 2 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–71 Main Fan (FM2) (page 3 of 3) 3 Remove the mechanical controller mount and board, remove the two brass-colored screws, and disconnect the three connectors below the duct. Grasp the fan duct, lift upward to release the two claws, and remove the fan and duct from the printer. 1 Claw Fan Duct Claw 2 Connectors 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–72 I/O Controller Fan (FM3) (page 1 of 2) First Now Remove top cover, left cover, rear cover, and rear shield plate. 1 Disconnect J2010 from the mechanical controller board. Remove the black screw and the plastic bezel. Screw Bezel I/O Controller Fan 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–73 I/O Controller Fan (FM3) (page 2 of 2) 2 Remove the brass-colored screw and the four flex-type tabs that secure the fan duct to the I/O board housing. Remove the fan and duct from the printer, then remove the fan from the grounding plate and duct. Screw Tabs Tabs Replacement Note: Install the fan with the vendor label facing out. 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–74 I/O Interconnect Shield (page 1 of 2) First Now Remove the front door, top cover, and status panel bottom cover. 1 Remove the nine silver-colored screws that secure the I/O interconnect shield to the chassis. 1 2 3 4 5 6 I/O Interconnect Shield 7 8 9 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–75 I/O Interconnect Shield (page 2 of 2) 2 Lift the shield and status panel housing and disconnect J803 on the I/O interconnect board. Remove the shield and housing from the printer. Right Slot J803 Left Slot Replacement Note: Two small claws on the I/O interconnect shield mate into slots in the chassis. If the left slot is not rectangular, you may need to flatten the left claw prior to reinstallation to assure a tight fit between shield and chassis.
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Color LaserWriter 12/600 PS Take Apart 3–76 Density Control Panel First Remove top cover, left cover, rear cover, and rear shield plate. Now Remove the black screw and the plastic bezel. Remove the two silvercolored screws, disconnect connector J1 on the back of the density control panel, and remove the panel from the printer. Screw Bezel Density Control Panel Connector Screws 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–77 I/O Interconnect Board First Remove I/O controller board, front door, top cover, status panel bottom cover, and I/O interconnect shield. Now Disconnect the connectors from the I/O interconnect board. Remove the five silver-colored screws and remove the interconnect board from the printer. 2 3 1 4 5 I/O Interconnect Board 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–78 DC Controller Board (page 1 of 5) First Remove the I/O controller board, front door, top cover, left cover, rear cover, rear shield plate, status panel bottom cover, and I/O interconnect shield. Important: The DC controller board stores important information about consumables and other customer-specific parameters.
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Color LaserWriter 12/600 PS Take Apart 3–79 DC Controller Board (page 2 of 5) Now 1 Disconnect connectors J2007 and J2010 from the mechanical controller board. Note: J2010 is the wide ribbon cable at the top of the mechanical controller board. J2010 J2007 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–80 DC Controller Board (page 3 of 5) 2 Remove the seven silver-colored screws that secure the I/O board housing to the chassis. Disconnect connectors J802 and J804 from the I/O interconnect board and remove the cable from the cable clamp. I/O Board Housing 1 4 2 5 3 Ferrite Guide 6 7 Replacement Note: When replacing the I/O board housing, make sure to thread the ribbon cable through the ferrite guide. 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–81 DC Controller Board (page 4 of 5) 3 Pull the fan cable under the density control panel bezel and lift the I/O board housing from the printer (not shown in photo). Remove the two brass-colored screws that secure the black cable guide to the chassis. Disconnect connectors J101, J102, and J103 at the cable guide and remove the cable guide from the printer.
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Color LaserWriter 12/600 PS Take Apart 3–82 DC Controller Board (page 5 of 5) 4 Remove all the remaining connectors and the four silver-colored screws, and remove the DC controller board from the printer. Note: J108 and J112 have a clampless socket-style fitting. If you are removing the board only to get to the laser scanner assembly, do not disconnect these two connectors. If you are replacing the board, grasp each edge of the cable and carefully pull straight up to remove the cable.
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Color LaserWriter 12/600 PS Take Apart 3–83 Laser/Scanner Assembly First Remove the I/O controller board, front door, top cover, left cover, rear cover, rear shield plate, status panel bottom cover, I/O interconnect shield, and DC controller board. Now Remove the two silver-colored grounding screws and four brasscolored mounting screws that secure the laser/scanner assembly to the chassis. Remove the assembly from the printer. Mounting Screws Grounding Screws 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–84 Mechanical Controller Board First Remove the top cover, left cover, rear cover, and rear shield plate. Note: Perform this procedure only if you are replacing a board. If you are disassembling the printer to get to a deeper part, see the “Mechanical Controller Mount and Board” topic. Now Remove the four black screws and all the connectors going into the board, and remove the board from the printer.
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Color LaserWriter 12/600 PS Take Apart 3–85 Mechanical Controller Mount and Board (page 1 of 3) First Remove the top cover, left cover, rear cover, and rear shield plate. For better clearance you can also remove the main fan. Note: Perform this procedure only if you need to get to a part deeper in the printer. If you simply want to replace the mechanical controller board, see the “Mechanical Controller Board” topic. Now 1 Remove all the connectors going into the mechanical controller board.
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Color LaserWriter 12/600 PS Take Apart 3–86 Mechanical Controller Mount and Board (page 2 of 3) 2 Remove the two silver-colored screws at the left and right side of the board, and the one brass-colored screw below the board. Remove the cables from the cable guide at the top of the board. Disconnect the large connector going into J1004 on the high-voltage power supply. 1 Cable Guide 3 2 Cable to J1004 Replacement Note: Make sure that you install the three screws tightly in their correct locations.
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Color LaserWriter 12/600 PS Take Apart 3–87 Mechanical Controller Mount and Board (page 3 of 3) Movie 3 Using a flat-blade screwdriver, press upward on the claw that hooks into the chassis below connector J2017. Lift the mount slightly to free the tab at the upper right, and remove the mount and board from the printer, using an outward rolling motion. Tab Claw 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–88 Power Supply (page 1 of 2) First Now Remove the top cover, left cover, rear cover, and rear shield plate. Slide the paper pickup block outward as described in step 1 of the “Paper Pickup Block Removal” topic. 1 Release the tab that secures the black power switch cable cover to the pickup block side of the chassis wall, (the lower of the two cable covers in that area).
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Color LaserWriter 12/600 PS Take Apart 3–89 Power Supply (page 2 of 2) 2 Remove the five silver-colored screws and the six connectors along the edges of the power supply and remove the power supply from the printer. 1 5 2 Power Supply Tab 3 Tab 4 Replacement Note: The two metal tabs at the bottom of the power supply nest over the edge of the chassis frame. 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–90 High-Voltage Power Supply First Remove the paper cassette, top cover, left cover, rear cover, rear shield plate, and power supply. Leave the paper pickup block in its out position. Now Remove the two brass-colored screws that secure the high-voltage power supply to the chassis. Remove the silver-colored grounding screw. Disconnect the four connectors and pull the high-voltage power supply out of the printer.
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Color LaserWriter 12/600 PS Take Apart 3–91 About Solenoids General There are nine solenoids in the Color LaserWriter 12/600 PS and one in the optional sheet feeder. Five of these are available only as a part of larger assemblies (see “Solenoids/Clutches” in Chapter 4). The five solenoids listed below are available separately. Cleaning belt drive solenoid SL3 Solenoid SL3 is located in the upper rear of the printer to the right of the paper delivery assembly.
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Color LaserWriter 12/600 PS Take Apart 3–92 Cleaning Belt Drive Solenoid First Now Remove the top cover. 1 Remove the two silver-colored screws and disconnect the connector on the rear face of the transit coupling. Lift the cleaning belt drive solenoid from the printer. 2 Advance Lever Cleaning Belt Drive Solenoid Rotator Arm Connector 1 Replacement Notes: 1 Make the connection at the transit coupling before placing the solenoid.
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Color LaserWriter 12/600 PS Take Apart 3–93 Solenoid Assembly (page 1 of 2) First Now Remove the top cover, left cover, rear cover, rear shield plate, and power supply. Leave the paper pickup block in its out position. 1 Disconnect the solenoid harness cable from J2014 on the mechanical controller board. Remove the cable from the cable clamp on the printer chassis. Disconnect the transfer drum cleaner connector from the transit coupling near the left end of the assembly.
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Color LaserWriter 12/600 PS Take Apart 3–94 Solenoid Assembly (page 2 of 2) 2 If you need to replace one of the solenoids, remove the screw and lift the solenoid from the support plate. Transfer Drum Cleaner Press Solenoid SL8 Discharge Roller Press Solenoid SL9 Transfer Drum Press Solenoid SL7 Attraction Roller Press Solenoid SL6 95.08.24.14.
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Color LaserWriter 12/600 PS Take Apart 3–95 Delivery Drive Assembly First Remove the top cover. Now Remove the silver-colored screw that secures the delivery drive assembly to the printer. Swing the assembly back, unhook it from the metal shaft, and remove the assembly from the printer. Delivery Drive Assembly Screw Hook 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–96 About Transfer Drum Peripherals General The four assemblies below transfer mechanical drive to the transfer drum and its peripherals. Take-apart procedures for each directly follow this topic. Refer to Chapter 1 for full information on the functions of these four assemblies. Cleaning Drive Assembly Discharge Roller Drive Assembly Transfer Drum Drive Assembly Attraction Roller Drive Assembly 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–97 Cleaning Drive Assembly First Remove the top cover, left cover, rear cover, rear shield plate, power supply, solenoid assembly, and main motor. Leave the paper pickup block in its out position. Now Remove the two silver-colored screws and remove the cleaning drive assembly from the printer. 2 1 Cleaning Drive Assembly 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–98 Attraction Roller Drive Assembly First Remove the top cover, left cover, rear cover, rear shield plate, power supply, and solenoid assembly. Leave the paper pickup block in its out position. Now Remove the two silver-colored screws and remove the attraction roller drive assembly from the printer. 1 2 Attraction Roller Drive Assembly 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–99 Discharge Roller Drive Assembly First Remove the top cover, left cover, rear cover, rear shield plate, power supply, and solenoid assembly. Leave the paper pickup block in its out position. Now Remove the two silver-colored screws and pull the discharge roller drive assembly out of the printer. 2 Discharge Roller Drive Assembly 1 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–100 Transfer Drum Drive Assembly First Remove the top cover, left cover, rear cover, rear shield plate, power supply, and solenoid assembly. Lower the transfer drum lever. Leave the paper pickup block in its out position. Now Remove the two silver-colored screws and remove the transfer drum drive assembly from the printer.
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Color LaserWriter 12/600 PS Take Apart 3–101 Transfer Drum Cleaning Assembly (page 1 of 4) First Now No first steps are required. 1 Open the pickup block cover. Release the green lock levers at each side of the pickup block and slide the block out. Lock Lever Lock Lever 95.08.24.14.
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Color LaserWriter 12/600 PS Take Apart 3–102 Transfer Drum Cleaning Assembly (page 2 of 4) 2 Remove the connector cover at the right end of the assembly and unplug the connector. 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–103 Transfer Drum Cleaning Assembly (page 3 of 4) 3 Unlock the lock lever at the left end of the assembly. Lever 95.08.24.14.
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Color LaserWriter 12/600 PS Take Apart 3–104 Transfer Drum Cleaning Assembly (page 4 of 4) 4 Slide the assembly to the left and pull it out of the printer. 95.08.24.14.
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Color LaserWriter 12/600 PS Take Apart 3–105 High-Voltage Separation Assembly (page 1 of 3) First Remove the I/O controller board, top cover, left cover, rear cover, rear shield plate, fuser fan, and mechanical controller mount and board. Now 1 Remove the three brass-colored terminal-contact screws, the brasscolored screw that secures the assembly to the chassis, and the silvercolored grounding screw. Remove the contact cables from their guides and clamps.
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Color LaserWriter 12/600 PS Take Apart 3–106 High-Voltage Separation Assembly (page 2 of 3) Note: For clearance purposes, you must loosen the I/O board housing so that you can perform step 3. 2 Remove the four rearmost silver-colored screws that secure the I/O board housing to the chassis, raise the housing slightly, and hold it. I/O Board Housing 3 4 1 2 3 Grasp the high-voltage separation assembly and shift it firmly to the left to release the claw. Remove the assembly from the printer. 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–107 High-Voltage Separation Assembly (page 3 of 3) Replacement Note: Make sure to place all of the cabling securely into the proper cable guides. High-Voltage Separation Assembly 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–108 Transfer Drum Assembly (page 1 of 2) First Remove the toner disposal box, photoconductor cartridge, toner cartridges, inner panel 1, top cover, and pickup block. Raise the separation discharge assembly. Caution: Use cotton gloves when working with the transfer drum. Do not touch the surface of the drum with your hands. If the surface gets soiled, use only lint-free paper or cloth to clean it.
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Color LaserWriter 12/600 PS Take Apart 3–109 Transfer Drum Assembly (page 2 of 2) 2 Lower the transfer drum lever. Grasp the rounded opening in the transfer drum end panel and slide the assembly halfway out. Place your other hand underneath the assembly and finish sliding it from the printer. Do not scrape the surface of the drum against the chassis.
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Color LaserWriter 12/600 PS Take Apart 3–110 Paper Delivery Assembly (page 1 of 2) First Remove the top cover, fuser oil bottle, fuser assembly, cleaning belt drive solenoid, and delivery drive assembly. Now 1 Disconnect the connector at cleaning belt sensor PS5 at the left end of the paper delivery assembly. Paper Delivery Assembly PS5 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–111 Paper Delivery Assembly (page 2 of 2) 2 Release the flex tab and shift the assembly to the right to unhook the claws. Remove the assembly from the printer. Tab 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–112 Printer Drive Assembly (page 1 of 2) First Now Remove the toner disposal box, photoconductor cartridge, toner cartridges, I/O controller board, fuser assembly, top cover, inner panel 1, delivery drive assembly, left cover, rear cover, rear shield plate, fuser fan, mechanical controller mount and board, high-voltage separation assembly, paper pickup block, and transfer drum assembly.
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Color LaserWriter 12/600 PS Take Apart 3–113 Printer Drive Assembly (page 2 of 2) 2 For clearance purposes, remove the two silver-colored screws that secure the receptacle of the fuser interconnect cable to the chassis. 1 Fuser Interconnect Cable Receptacle 2 3 Carefully remove the printer drive assembly from the printer. Replacement Note: Press the assembly straight inward while using a slight side-to-side rocking motion.
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Color LaserWriter 12/600 PS Take Apart 3–114 Toner Sensor (Emitter) First Remove the printer drive assembly (see previous topic). The toner sensor emitter is a part of printer drive assembly P/N 9221334. The circuit board portion of the emitter is also available separately as P/N 922-1558. Now Remove the connector and the brass-colored screw and remove the toner sensor emitter from the printer drive assembly.
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Color LaserWriter 12/600 PS Take Apart 3–115 Toner Sensor (Receiver) (page 1 of 3) First Remove the toner disposal box, photoconductor cartridge, toner cartridges, inner panel 1, top cover, pickup block, and transfer drum assembly. Raise the separation discharge assembly. For this procedure, you will need a short Phillips screwdriver, no more than 4 inches (10 cm) long. Do not touch the sensor with your hands. If it gets soiled, clean it with a lint-free paper or cloth. 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–116 Toner Sensor (Receiver) (page 2 of 3) Now 1 Remove the brass-colored screw that secures the sensor holder to the chassis ceiling above the carousel. Disconnect the connector and remove the sensor and holder from the printer. Screw Connector 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–117 Toner Sensor (Receiver) (page 3 of 3) 2 Release the four tabs and separate the sensor board from the holder. Tabs Sensor Board Toner Sensor Holder Tabs Note: The sensor board is P/N 922-1559; the toner sensor holder is P/N 922-1308; and the cable going into the board is P/N 922-1328. 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–118 Oil Sensor Assembly (page 1 of 2) First Now Remove the fuser access cover and fuser assembly. 1 Remove the brass-colored screw. Oil Sensor Assembly Screw 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–119 Oil Sensor Assembly (page 2 of 2) 2 Raise the top access door and locate the black cable cover on the chassis wall just below where the green brush is mounted. Using a small flat-blade screwdriver, raise the cable cover tab and slide the cover toward the carousel to release the claws. Remove the cable cover from the chassis. Disconnect the oil sensor cable from the transit coupling and remove the oil sensor assembly from the printer.
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Color LaserWriter 12/600 PS Take Apart 3–120 Disposal Box Cover Assembly (page 1 of 2) First Now Remove the toner disposal box. 1 Release the three tabs and remove the facing panel of the disposal box cover assembly. Disposal Box Cover Assembly Tab Tab Tab 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–121 Disposal Box Cover Assembly (page 2 of 2) 2 Disconnect the three-wire connector from J631 on the sensor board. Remove the large stepped screw, free the cable from the cable clamp and cable guide, and remove the disposal box cover from the printer. J631 Stepped Screw Note: The stepped screw is a part of screw kit P/N 076-0501. 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–122 Toner Release Assembly (page 1 of 2) First Now Remove the toner cartridges, front door, inner panel 1, toner carousel guide panel, top cover, and left cover. 1 Disconnect the five-wire temperature/humidity connector from the transit coupling on the inside face of the rear chassis. Transit Coupling Toner Release Assembly 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–123 Toner Release Assembly (page 2 of 2) 2 Release the two tabs, pull the green handle to its full extension, and slide the assembly towards the rear of the printer. Remove the assembly through the left side of the printer. Tabs Stopper Posts Replacement Note: Pull the green handle to its full extension before seating the assembly into the slots in the chassis. The handle must rest outside the two stopper posts on the ejection/cassette sensor mount. 95.08.23.
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Color LaserWriter 12/600 PS Take Apart 3–124 Temperature/Humidity Sensor First Remove the toner cartridges, front door, inner panel 1, toner carousel guide panel, top cover, left cover, and toner release assembly. Now Slide the sensor board off the toner release assembly. Temperature/Humidity Sensor Board Toner Release Assembly 95.08.24.14.
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Color LaserWriter 12/600 PS Take Apart 3–125 Ejection Sensing Board (page 1 of 3) First Now Remove the paper cassette, toner cartridges, front door, inner panel 1, toner carousel guide panel, top cover, left cover, and toner release assembly. 1 Disconnect J1601 from the ejection sensing board. J1601 Ejection Sensing Board 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–126 Ejection Sensing Board (page 2 of 3) 2 Remove the brass-colored screw and pull the ejection/cassette sensor assembly from the printer. Screw Ejection/Cassette Sensor Assembly 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–127 Ejection Sensing Board (page 3 of 3) 3 Disconnect J1602 from the ejection sensing board. Remove the black screw and lift the board from the mounting. Screw Ejection Sensing Board J1602 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–128 Cassette Size Sensing Board (page 1 of 5) First Now Remove the paper cassette, toner cartridges, front door, inner panel 1, toner carousel guide panel, top cover, left cover, and toner release assembly. 1 Disconnect J1601 from the ejection sensing board. J1601 Ejection Sensing Board 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–129 Cassette Size Sensing Board (page 2 of 5) 2 Remove the brass-colored screw and pull the ejection/cassette sensor assembly from the printer. Screw Ejection/Cassette Sensor Assembly 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–130 Cassette Size Sensing Board (page 3 of 5) 3 Disconnect J1602 from the ejection sensing board and free the cable from the cable guide. Ejection Sensing Board J1602 Cable Guide 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–131 Cassette Size Sensing Board (page 4 of 5) 4 Release the tab and snap the sensor housing upward and out of the metal plate. Tab 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–132 Cassette Size Sensing Board (page 5 of 5) 5 Release the two tabs and remove the cover. Disconnect J312, release the tab, and remove the cassette size sensing board. Tabs 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–133 Position Sensor Assembly (page 1 of 2) First Remove the top cover, left cover, rear cover, rear shield plate, mechanical controller mount and board, and main fan. Now 1 Disconnect the cable from the cable clamp and remove the three silvercolored screws that secure the position sensor assembly to the chassis. Cable Clamp 1 2 3 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–134 Position Sensor Assembly (page 2 of 2) 2 Disconnect the cable from the transit coupling at the right edge of the printer drive assembly. For clearance purposes, press the coupling inward through the flange to get it out of the way of the position sensor plate. Remove the sensor plate and press drive gear from the printer. Transit Coupling Press Drive Gear Sensor Plate 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–135 Carousel Manual Rotary Assembly (page 1 of 2) First Remove the front door, toner carousel guide panel, top cover, left cover, rear cover, rear shield plate, mechanical controller mount and board, and main fan. Now 1 Remove the brass-colored screw and slide the knob, disk, and spring off the end of the shaft. Screw Knob 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–136 Carousel Manual Rotary Assembly (page 2 of 2) 2 Remove the four silver-colored screws that secure the carousel manual rotary assembly to the chassis, lift the carousel interlock to clear the gray plastic support at the knob-end of the assembly, and remove the assembly from the printer. 1 3 Carousel Interlock 2 4 Support 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–137 Toner Carousel Interlock First Remove the top cover, left cover, rear cover, rear shield plate, mechanical controller mount and board, main fan, and carousel manual rotary assembly. Now Remove the E-ring and slide the interlock off the shaft. Toner Carousel Interlock E-Ring 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–138 Toner Carousel Assembly (page 1 of 5) First Now Remove the toner disposal box, photoconductor cartridge, toner cartridges, front door, inner panel 1, toner carousel guide panel, top cover, left cover, rear cover, rear shield plate, mechanical controller mount and board, main fan, carousel manual rotary assembly, and position sensor assembly. 1 Remove the two brass-colored screws and lift the developing bias contact holder off the chassis.
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Color LaserWriter 12/600 PS Take Apart 3–139 Toner Carousel Assembly (page 2 of 5) Replacement Note: Make sure to install the rocker pin so that the end with the rectangular tip seats in the cutout at the bottom of the developing bias contact. Developing Bias Contact Rocker Pin Note: The press drive gear actuates this rocker pin during cartridge press to complete the developing bias circuit into the toner cartridge. 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–140 Toner Carousel Assembly (page 3 of 5) 2 Remove the three silver-colored self-tapping screws and remove the rear carousel bushing from the chassis. You may have to shift the carousel slightly for the bushing to clear the printer drive assembly.
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Color LaserWriter 12/600 PS Take Apart 3–141 Toner Carousel Assembly (page 4 of 5) 3 Remove the three brass-colored screws and remove the front carousel bushing. If necessary, unclamp the cable to free the bushing. Front Carousel Bushing 1 2 3 Replacement Note: This bushing is keyed. Set it in position in the chassis and manually rotate the carousel’s central rotary mechanism until the bushing seats solidly in place.
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Color LaserWriter 12/600 PS Take Apart 3–142 Toner Carousel Assembly (page 5 of 5) 4 Slide the carousel assembly out the left side of the printer. Caution: Take care not to damage the carousel flags during this procedure. A broken flag will result in a toner carousel error and prevent the printer from operating. For more information see Chapter 1.
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Color LaserWriter 12/600 PS Take Apart 3–143 Sheet Feeder Removal (page 1 of 2) First No first steps are required. Note: The Color LaserWriter 12/600 PS is very heavy and requires two people to lift it. The right side of the printer is heavier than the left. Now 1 Unplug the sheet feeder power cord from the printer. Printer Power Cord Sheet Feeder 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–144 Sheet Feeder Removal (page 2 of 2) 2 Remove the two cotter pins that secure the printer to the feeder. Grip the two hand recesses on each side of the printer and remove the printer from the sheet feeder. Cotter Pin 1 Cotter Pin 2 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–145 Sheet Feeder Front Cover First Remove the paper cassette. Now Open the side access cover. Remove the three brass-colored screws. Lift the front cover up to release the three hidden claws along the outside edge of the feeder, and remove the cover from the feeder. Front Cover 1 2 3 Side Access Cover 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–146 Sheet Feeder Rear Cover First Remove the cassette. Now Remove the two brass-colored screws and remove the rear cover from the sheet feeder. 1 2 Rear Cover 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–147 Sheet Feeder Left Cover First Remove the cassette, front cover, and rear cover. Now Remove the two brass-colored screws and remove the left cover from the sheet feeder. 1 2 Left Cover 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–148 Sheet Feeder Right Corner Cover First Remove the cassette and front cover. Now Remove the brass-colored screw and lift the right corner cover from the sheet feeder. Screw Right Corner Cover 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–149 Sheet Feeder Side Access Cover (page 1 of 2) First Now Remove the cassette. 1 Open the side access cover. Remove the two E-rings that hold the hinge pins to the pickup block. E-Rings Side Access Cover 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–150 Sheet Feeder Side Access Cover (page 2 of 2) 2 While holding the metal bracket in place, remove the black screw that holds the metal bracket to the cover. Press the black tabs and slide the two white plastic hinge arms off the pickup block. Free the side access cover from its hinge pins and remove it from the sheet feeder. Tab Hinge Arm Tab Hinge Arm Screw and Bracket 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–151 Sheet Feeder Pickup Block (page 1 of 2) First Remove the cassette, front cover, and side access cover. The sheet feeder pickup block consists of two assemblies, the front paper pickup assembly (P/N 922-1358) and the rear paper pickup assembly (P/N 922-1359). Now 1 Remove the five silver-colored screws and lift the metal gear cover from the sheet feeder. Gear Cover 1 2 Sheet Feeder Pickup Block 3 4 5 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–152 Sheet Feeder Pickup Block (page 2 of 2) 2 Remove the seven large silver-colored screws, disconnect the three connectors, and lift the pickup block from the sheet feeder. 7 Connectors 1 6 2 5 3 4 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–153 Sheet Feeder Front Paper Pickup Assembly First Remove the cassette, front cover, side access cover, and pickup block. Now Remove the E-ring at the right hinge pin of the pickup block and separate the front assembly from the rear assembly. Front Paper Pickup Assembly Rear Paper Pickup Assembly E-Ring 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–154 Sheet Feeder Rear Paper Pickup Assembly First Remove the cassette, front cover, side access cover, and pickup block. Now Remove the E-ring at the right hinge pin of the pickup block and separate the front assembly from the rear assembly. Front Paper Pickup Assembly Rear Paper Pickup Assembly E-Ring 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–155 Oil-Overflow Sensor (PS10) (page 1 of 6) First Remove the fuser access cover, fuser oil bottle, and the fuser assembly. Set the fuser assembly down with the delivery side facing you. Note: The photo-interrupter at oil-overflow sensor is available as P/N 922-1353 Now 1 Remove the tension spring that goes between the delivery roller mechanism and the bottom plate of the fuser. Tension Spring 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–156 Oil-Overflow Sensor (PS10) (page 2 of 6) 2 Remove the two brass-colored screws, one that secures the right knob to the fuser, and the other that secures the black cover plate to the fuser. Release the two tabs at the right end of the fuser and remove the black cover plate. Tab Cover Plate Tab 1 2 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–157 Oil-Overflow Sensor (PS10) (page 3 of 6) 3 Remove the silver-colored screw that secures the metal pivot mount to the fuser and slide the mount about 3/4 inch (2 cm) to the right. Remove the delivery roller mechanism from the fuser. Pivot Mount Delivery Roller Mechanism 95.08.23.09.
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Color LaserWriter 12/600 PS Take Apart 3–158 Oil-Overflow Sensor (PS10) (page 4 of 6) 4 Remove the two black screws and lift the long black trim piece from the fuser. Remove the four brass-colored screws that secure the two filter covers to the fuser chassis and remove the covers from the fuser. Note: You need a small thin Phillips screwdriver to get at the four screws securing the filter covers Be careful not to damage the lower fuser roller when removing these screws.
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Color LaserWriter 12/600 PS Take Apart 3–159 Oil-Overflow Sensor (PS10) (page 5 of 6) Note: For the following step, you will need a short Phillips screwdriver no more than 3.5 inches (8.9 cm) in length. 5 Using the short screwdriver, remove the brass-colored screw and lift the sensor mount plate away from the fuser. Sensor Mount Plate Replacement Note: Be very careful to align the flag on the actuator with the slot in the bottom of the mount plate.
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Color LaserWriter 12/600 PS Take Apart 3–160 Oil-Overflow Sensor (PS10) (page 6 of 6) 6 Remove the connector from sensor PS10. Release the four tabs and separate the sensor from the mount plate. Actuator Flag Sensor and Mount Plate Tabs 95.08.23.09.
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Color LaserWriter 12/600 PS Illustrated Parts 4–6 Finished Goods Parts Description The parts below are available through Finished Goods. This list contains both standard and optional parts. Color LaserWriter Toner Cartridge, Cyan ...........................................M3753G/A Color LaserWriter Toner Cartridge, Magenta......................................M3760G/A Color LaserWriter Toner Cartridge, Yellow .........................................M3758G/A Color LaserWriter Toner Cartridge, Black ....
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Color LaserWriter 12/600 PS Illustrated Parts 4–9 Sheet Feeder Exploded View 922-1355 Sheet Feeder Controller Bd. 661-0932 Sheet Feeder Power Supply (Universal) 922-1356 Sheet Feeder Cassette Sensor 922-1358 Front Pickup Assembly Sheet Feeder 922-1360 Feed Roller 922-1361 Front Roller Assy 661-0908 Sheet Feeder, Whole Unit 922-1362 Rear Roller Assy 922-1359 Rear Pickup Assy Sheet Feeder 96.05.15.10.
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Color LaserWriter 12/600 PS Illustrated Parts 4–11 Switches Locations The illustrations below show switch locations for the Color LaserWriter 12/600 PS and the optional sheet feeder. SW2001 SW2 CSW3 CSW2 CSW1 SW1601 SW1 SW301 SW302 CSW303 CSW302 CSW301 96.05.15.10.
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Color LaserWriter 12/600 PS Descriptions Illustrated Parts 4–12 The table below describes the switches for the Color LaserWriter 12/600 PS and the optional sheet feeder. Designation Name Availability SW1 Power switch P/N 922-1320 SW2 Door switch P/N 922-1351 • An actuator on the front door (P/N 922-1317) strikes a transfer rod that is in contact with the door switch assembly. • An actuator on the fuser access cover (P/N 9221339) strikes a lever that is in contact with the door switch assembly.
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Color LaserWriter 12/600 PS Illustrated Parts 4–13 Sensors Locations The illustrations below show sensor locations for the Color LaserWriter 12/600 PS and the optional sheet feeder. PS4 PS3 PS11 PS14 PS11 PS8 PS7 T/H PS6 PS5 PS12 TH PS10 PS9 TP1 PS13 PS301 TP2 PS1 PS303 PS2 PS302 PS351 PS352 96.05.15.10.
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Color LaserWriter 12/600 PS Descriptions (1 of 2) Illustrated Parts 4–14 The table below describes the photo-interrrupter sensors used in the Color LaserWriter 12/600 PS and the optional sheet feeder. All of these sensors consist of two basic elements, one electrical (a U-shaped, lightemitting sensor), and one mechanical (a flag that is actuated by some other movement within the printer).
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Color LaserWriter 12/600 PS Descriptions (2 of 2) Photosensor Thermistor Thermoswitch Sensor 4–15 The table below describes the other sensors used in the Color LaserWriter 12/600 PS.
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Color LaserWriter 12/600 PS Illustrated Parts 4–16 Solenoids/Clutches Locations The illustrations below show solenoid and clutch locations for the Color LaserWriter 12/600 PS and the optional sheet feeder. SL3 SL5 CL2 CL1 CL4 SL6 SL4 SL8 SL7 SL9 CL3 SL2 SL1 SL351 96.05.15.10.
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Color LaserWriter 12/600 PS Descriptions Name/Function Availability SL1 Cassette feed solenoid Part of the cassette pickup assembly (P/N 661-0907) SL2 Manual feed solenoid Part of the multipurpose pickup assembly (P/N 922-1322) SL3 Cleaning belt drive solenoid P/N 922-1406 SL4 Gripper drive solenoid Part of the transfer drum assembly (P/N 661-0906) SL5 Separation claw solenoid Part of the transfer drum assembly (P/N 661-0906) SL6 Attraction roller press solenoid P/N 922-1403 SL7 Trans
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Color LaserWriter 12/600 PS Illustrated Parts 4–18 Motors/Fans/Heaters Locations The illustrations below show fan, motor, and fuser heater locations for the Color LaserWriter 12/600 PS and the optional sheet feeder. FM3 FM1 FM2 M4 M3 M2 H1 M5 H2 M1 M6 96.05.15.10.
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Color LaserWriter 12/600 PS Descriptions Fan Fuser Heater 4–19 The table below describes the fan, motor, and fuser heaters used in the Color LaserWriter 12/600 PS.
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Color LaserWriter 12/600 PS Illustrated Parts 4–20 Circuit Boards Locations The illustrations below show circuit board locations for the Color LaserWriter 12/600 PS and the optional sheet feeder. 1 6 2 3 4 5 5 9 8 7 2 10 8 96.05.15.10.
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Color LaserWriter 12/600 PS Descriptions No. Illustrated Parts 4–21 The table below describes the major circuit boards used in the Color LaserWriter 12/600 PS and the optional sheet feeder. Name/Function Availability 1 I/O controller board P/N 661-0133 2 I/O interconnect board Relays signals between the DC controller and the I/O controller boards.
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Color LaserWriter 12/600 PS Illustrated Parts 4–22 Connector Locations 1 of 3 J2007 J2005 J2004 J2003 J2008 J2009 J2002 J2001 J114 J802 J108 J112 J107 J106 J105 J63 J101 J104 J622 J801 J851 J15 J64 J21 J13 J5 J16 J1001 J631 J4 J632 J62 J633 J97 J3 J61 J7 J2 J1 J41 J1601 J632 J312 J6 J631 J633 J1602 J60 J59 J401 J110 J111 J402 J102 J451 J2066 J2022 J1502 J2019 J2017 J2010 J2011 J2012 J2013 J2014 J58 J701 J15 J621 J65 J56 J52 J57 J51 J55 J53 J1201 J54 96.05.15.
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Color LaserWriter 12/600 PS Illustrated Parts 4–23 2 of 3 J803 J345 J103 J501 J43 J42 J13 J44 J47 J41 J46 J35 J34 J36 J303J304 J302 J310 J33 J32 J305 J301 J31 J2016 J2015 J21 J23 J28 J1004 J22 J29 96.05.15.10.
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Color LaserWriter 12/600 PS Illustrated Parts 4–24 3 of 3 J357 J351 J352 J353 J356 J355 J354 J361 J312 J359 J358 96.05.15.10.
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Bulletins 96.09.06.09.
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Color LaserWriter 12/600PS- Leveling Instructions 3/14/96 3/15/96 Almost any non-compressible flat object can be used as a shim when leveling the Color LaserWriter. Items commonly found at customer locations which can be used include Post-It Notes™, note cards, paper, magazines, etc. Other materials that can be cut to size include wood, plastic, and metal. Post-It Notes™ work well because the shim height can be easily adjusted by tearing off or adding pieces of paper.
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Color LaserWriter 12/600PSCircuit Breaker Reset Procedures In order to access the circuit breaker the rear plastic cover must be removed so that the main power supply is exposed. The circuit breaker itself is hidden, but there is a small oval hole cut in the power supply sheet metal which can be used to view whether or not the circuit breaker needs to be reset. Once the hole has been located (see pictures below), check to see whether or not the yellow plastic indicator from the circuit breaker is visible.
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K Service Source Exploded View Color LaserWriter 12/600 12/660
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Exploded View 1 Exploded View 922-1318 Top Access Door Cover 661-0217 Hard Drive 240 MB 076-0514 I/O Bracket 922-1494 Hard Drive Bracket 661-1701 SIMM 922-1303 Top Cover 922-1307 Air Filter 661-0133 I/O Controller Bd 922-1302 Left Cover 922-1319 I/O Interconnect Bd 922-1349 Main Fan (FM2) 922-1354 Separation Discharge Assy 922-1387 Status Panel 922-1310 Density Sensor Assy 922-1715 Status Panel Cover 661-0898 DC Controller Board 922-2220 Density Sensor Link Arm 661-0902 Laser/Scanner Assy 922-1