EPSON TERMINAL PRINTER SQ - 870/1170 4001225 REV.
o NOTICE “ All rights reserved. Reproduction of any part of this manual in any from whatsoever without SEIKO EPSON’s express written permission is forbidden. “ The contents of this manual are subject to change without notice. “ All efforts have been made to ensure the accuracy of the contents of this manual. However, should any errors be detected, SEIKO EPSON would greatly appreciate being informed of them.
REV.-A PRECAUTIONS Precautionary notations throughout the text are categorized relative to 1 ) personal injury, and 2) damage to equipment: DANGER Signals a precaution which, if ignored, could result in serious or fatal personal injury. Great caution should be exercised in performing procedures preceded by a DANGER headings. WARNING Signals a precaution which, if ignored, could result in damage to equipment.
REV.-A PREFACE This manual describes functions, theory of electrical and mechanical operations, maintenance, and repair of the SQ-870/l 170. The instructions and procedures included herein are intended for the experienced repair technician, and attention should be given to the precautions on the preceding page. The chapters are organized as follows: Chapter 1 - Provides a general product overview, lists specifications, and illustrates the main components of the printer.
@ REVISION SHEET REVISON DATE ISSUED CHANGE DOCUMENT A Feb. 21, 1992 1st issue L e,:.;-.,.
REV.-A TABLE OF CONTENTS CHAPTER 1. CHAPTER 2. CHAPTER 3. CHAPTER 4. CHAPTER 5. CHAPTER 6.
REV CHAPTER 1 GENERAL DESCRIPTION 1.1 FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 1.2 SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 . 1.2.1 Hardware Specifications . . . . . . . . . . . . . . . . . . . . . .
REV.-A LIST OF FIGURES Figure 1-1. .. Exterior View of the SQ-1 170 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2 Figure 1-2. Nozzle Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. ......1-3 .... Figure 1-3. ... Release Lever Positions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 .... Figure 14. Label Size . . . . . . . . . . .
REV.-A 1.1 FEATURES The SQ-870/l 170 is a high speed 48-nozzle ink jet printer which provides advanced paper handling that is upper compatible with the TSQ-4800.
REV.-A Table 1-2. Optional Units 1 Descriptions Model I C80647 / Single-bin cut-sheet feeder (80 columns] C80648 Single-bin cut-sheet feeder (136 columns) C80637 Second bin hopper (80 columns) IC80640 I S e c o n d binhopper(136 c o l u m n s ) C80023 Tractor unit (80 columns) C80024 Tractor unit (136 columns) SO2OO1O Ink cartridge I I I J Figure 1-1. Exterior View of the S(2-870/1 170 0 .,,?5 e.
REV.-A 1.2 SPECIFICATIONS This section provides specifications for the SQ-870/l 170 printer. 1.2.1 Hardware Specifications Printing method On-demand type ink jet system Nozzle configuration 48 nozzles (48 X 1 diagonal) 1 ‘o a m ~ h *i ‘g s Al \- ~1 A2 ‘2 A 3 ~ (7.125°) 3 * 1/45” 47/45” ● h Figure 1-2.
REV.-A 3. Push-pull tractor feed (release lever in REAR PUSH POSITION or FRONT PUSH POSITION). ● The paper must be loaded from the front or rear entrance. ● Release the friction-feed mechanism. ● Attach the pull tractor unit. O Ensure that there is no slack in the paper between the platen and the pull tractor. ● Precisely adjust the horizontal position of the pull tractor and push tractor. ● Paper for multiple copies must be spot pasted on both side of the perforation betvveen the tractor holes.
REV.-A Table 1-5. EnveIo~es Size Thickness [ Weight Quality No. 6 166 mm X 92 mm (6.5 in. X 3.625 in.) No. 10240 mm X 104 mm (9.5 in. X 4.125 in.) 0.16 mm to 0.52 mm (0.0063 in. to 0.0197 in.) Differences in thickness within the printing area must be less than 0.25 mm (0.0098 in.) 12 lb to 24 lb (45 g/m2 to 91 g/m2) Bond paper, standard paper, airmail NOTES: ● Printing on envelopes is available only at normal temperatures and only using top insertion.
REV.-A Printable area See figures 1-5 and 1-6 182-257mm ~.2-10.lind?) : 60cdm = k~ 13.5rnm (0.53-inti) or more 0 q. ● 1: 80 columns: 3.0 mm (0.12 in.) or more when the width of paper is less than 229 mm (9 in.). ~~• 13 mm (0.51 in.) or more when the width of paper is 257 mm (10.1 in.). 136 columns: 3.0 mm (O. 12 in.) or more when the width of paper is less than 364 mm (1 4.3 in.) 25 mm (0.98 in.) or more when the width of paper is 420 mm (16.5 in.).
REV.
REV.-A 1 0 0 0 VAC rms 1 minute or 1200 Dielectric strength VAC rms 1 second (between AC line and chassis) 220 to 240 VAC Rated voltage 220/240 version Input voltage range 198 to 264 VAC Rated frequency range 50 to 60 Hz Input frequency range 49.5 to 60.5 Hz Rated current 0.4 A Power consumption Approx. 30 W (SQ-870) Approx. 30 W (SQ-1 170) (during a self-test in draft mode, 10 cpi) Insulation resistance 10 Megohms minimum (at 500 VDC between AC line and chassis).
REV.-A 1.2.
REV.-A Printing speed See Tables 1-8 and 1-9. Printing columns See Table 1-8. Character matrix See Table 1-10. Character size See Table 1-10. Table 1-8. Printing (Text Mode) Print Con- Empha- Pitch densed sized Printable Columns Double width 80 10 12 15 COi. 136 Col. Charactar Pitch (cpi) Printing Speed (Cps) Draft LQ 0 0 0 80 136 10 550 200 0 0 1 40 68 5 275 100 0 1 0 80 136 10 400 200 , 0 1 1 40 68 5 200 100 1 x o 137 233 17.
REV.-A Table 1-9.
REV.-A Table 1-10. Character Matrix and Character Size Printing Mode , Face Matrix HOD Character Size Unit ESC sp ;Draft, 10 pitch 15 x 44 180 2.1 x 3.1 120 Draft, 12 pitch 13 x 44 180 1.s 3.1 120 Draft, 15 pitch 11 X 32 180 1.6 X 2.3 120 Draft, 17 pitch 15 x 44 360 1.1 x 3.1 120 Draft, 20 pitch 13 x 44 360 0.9 x 3.1 120 LQ, 10 pitch 31 x 22 360 2.2 x 3.1 180 LQ, 12 pitch 27 X 22 360 1.9 x 3.1 180 LQ, 15 pitch 22 X 16 360 1.6 X 2.
REV.-A (Normal character) 1~ 2 Ascender area 3 17 18 4 5 1: . . . 6 7 R k F . k /y/ // s / T / /s/ . . : c E 39 . . . 45 46 47 48 : c E 40 41 . . (a2) (aO) 46 Descender area (Super-script character) From dot No. 33 to 48 are not used while superscript printing. — 47 L 48 L (Sub-script character) From dot No. 1 to 16 are not I while subscri~t ,.txinting. — ; 3 4 . . L Character width (CW) 4 . . 29 30 31 32 Figure 1-8.
REV.-A 1.3 INTERFACE OVERVIEW The printer has a parallel interface with the specifications described below. 1.3.1 Parallel Interface Specifications for the 8-bit parallel interface are as follows: Data format 8-bit parallel Synchronization STROBE signal Handshaking BUSY and ACKNLG signal Signal level ITL-compatible Adaptable 57-30360 (Amphenol) connector Data transmission timing or equivalent See Figure 1-9. BUSY It ,/ 4 [ // ACKNLG DATA STROBE o.5#s o.5/.ls o.5/ls 511s 5ps min.
Table 1-11. Connector Pin Assignments and Signal Functions (Cont.) Pin No. Signal Name 14 AUTOFEED-XT Return Pin No. Dir. -- IN Functional Description If LOW when the printer is initialized, the printer automatically performs a line feed upon input of the CR code (Auto LF). Not used. 15 16 GND 17 Chassis GND .. .- Ground for twisted-pair grounding. -- Chassis ground level of printer. Not used. 18 19 to 30 GND 31 I NIT Ground for twisted-pair grounding. 16 IN Pulse (width: 50ws, min.
REV.-A 1.4 CONTROL PANEL On the control panel are: 10 non-lock type buttons, and 24 indicators. k —— I Lom I -!. I 0 111— Figure 1-10. Control Panel BUTTONS (1) PAUSE Button This button controls printer action. Pressing the button toggles the printer between PAUSE condition (no printing, no paper feeding, or no data acception) and RUNNING. (2) FORM FEED Button Advances the paper to the next top of from position. This switch is also used for the micro feed function.
REV.-A (8) PITCH Button Pushing this switch once selects the character pitch. And holding this button down selects the following ones in sequence. PITCH indicators indicate the currently selected character pitch. (9) RESET Button Holding this button down more than 0.45 second, the input data buffer is cleared and the printer initialized by software as ESC Cl?. (10) CLEANING Button Holding this button down more than 0.5 second, the print head cleaning is performed.
REV.-A 1.5 DIP SWITCHES AND JUMPER SETTING This section describes the DIP switch selections and jumper setting for the SQ-870/l 170 printer. 1.5.1 DIP Switch Settings The two DIP switch banks for the printer, located on the control panel, are used to set various print conditions as shown in tables 1-12 through 1-15. (Note that the status of the DIP switches is read only at power on or upon receipt of the INIT signal.) Table 1.12. Settings for DIP Switch 1 (SW1) Description No.
REV.-A Table 1-14. international Character Set Selection 1-1 1-2 1-3 Pc ON ON ON ON OFF OFF OFF OFF ON ON OFF OFF ON ON OFF ON OFF ON OFF ON OFF ON Us. France Germany U.K. Denmark 1 Sweden Italy 437 850 860 863 865 (437) (437) OFF OFF Spain 1 (437) Country L When SW 1-4 is ON, ~ If italic table was selected by ESC t O, country setting becomes U.S. When SW 1-4 is OFF, if graphic table was selected by ESC t 1, PC becomes 437. Table 1-15.
REV.-A 1.6 OPERATING INSTRUCTIONS * This section describes the self-test and hexadecimal dump functions as well as the error states, printer initialization, and buzzer operation. 1.6.1 Self-Test To run the self-test using draft mode, turn the printer on while pressing the LINE FEED button. To run the self-test using the letter quality (LO) mode, turn the printer on while pressing the FORM FEED button. You can stop or start self-test printing by pressing the PAUSE button.
REV.-A ● Cover open The printer lid is opened. ● Fatal errors In the following cases, the printer recognizes them as fatal errors and enters the fatal error mode. The fatal error condition cannot be recovered until turning the power off. ● Carriage does not move correctly ● Control circuit cannot work correctly When the error condition is detected, the printer automatically enters ‘PAUSE’ mode and outputs appropriate interface signal.
REV.-A (2) Software initialization Input of the ESC C2 command also initialize the printer. Printer initialization by ESC C? code does not perform functions (d) or(e) above. The settings changed by the last SelecType operation are maintained. (3) Panel initialization This printer can be initialized by pressing the RESET button on the front panel. When the printer is initialized in this method, the functions (b), (d) and (e) above are not performed.
REV.-A When the paper is at the top-of-form position, the loading position is adjustable by using the ‘MICRO FEED’ function. In the ‘MICRO FEED’ function, pushing the LINE FEED button pushes the paper forward, and pushing the FORM FEED button pulls the paper backward. The adjusted loading position is stored into the memory and remains to be effective until the power is turned off.
REV.-A 1.6.11 Printhead Protection To keep the print quality, several kinds of printhead cleaning functions are performed automatically. (1) Power on cleaning Performed at power on when ‘(4) Cleaning’ as defined below is not required. It takes about several seconds. (2) Capping In the following cases the printhead is capped. It takes about a second. ● Printing is stopped about 3 seconds. ● Entering the PAUSE condition. (3) Refresh nozzles Performed about every 15 seconds during printing.
REV.-A 1.7 MAIN COMPONENTS The main components of the SQ-870/l 170 printer are designed for easy removal and replacement to facilitate maintenance and repair of the printer. The main components are: 1) C076 MAIN board: the main control board; the CPU on this board controls all main functions. 2) Control panel unit 3) C076 PSB/PSE 4) M-47 10/4760: board: the power supply board. the printer mechanism. C076 PSB/PSE Board C076 MAIN Board \ - Printer Mechanism M-4760 [ n )4 1 , Figure 1-12.
REV.-A 1.7.1 C076 MAIN Board (Main Control Circuit Board) The C076 MAIN board is the main board in the printer, and contains a logic circuit and printer mechanism driver circuit. The KPD70325 (location: IC5) is used, and the following memories and gate arrays are assigned in the 1 M byte memory space. Memories 5 12K\l M bits program ROM :Ic14 1 M bits PS-RAM :IC 1 9 / 2 2 / 2 3 8M\4M\2M/l M bits mask ROM (C.
REV.-A 1.7.2 Control Panel The Control Panel is, which includes the indicator LEDs, switches, and DIP switches. Figure 1-14. Control Panal 1.7.3 C076 PSB/PSE Board (Power Supply Circuit Board) The power supply unit consists of a switching regulator circuit, which converts the AC line voltage to the DC voltages (for example, + 35V and + 5V) used by the printer. The C076 PSB board is 120V input type, and the C076 PSE board is 220/240V input type. ❑ o PI 0 Figure 1-15.
REV.-A 1.7.4 Printer Mechanism (M-4710/4760) The M-47 10/4760 printer mechanism was developed specifically for SQ-870/l 170 printer. Included the components are a carriage motor, carriage mechanism, paper-feed motor, paper-feed mechanism, TE motor, top edge holding mechanism, pump motor, pump mechanism, printhead, and sensors. This printer mechanism allows three ways of paper insertion. o+:., . -. ,’ Figure 1-16. Model-4710/4760 Printer Mechanism 1.7.
REV.-A CHAPTER 2 OPERATION PRINCIPLES 2.1 OPERATING PRINCIPLES OF PRINTER MECHANISM..............2-1 2.1.1. Printhead Mechanism .............................................................2.2 2.1.2. Carriage Mechanism ...............................................................2.4 2.1.3. Paper Feed Mechanism ..........................................................2.6 2.1.3.1 Paper Feeding Mechanism.....................................2-6 2.1.3.2 Release Lever Operation............................
REV.-A LIST OF FIGURES Figure 2-1. Block Diagram of Printer Mechanism -Model .... -47 10/4760 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1 Figure 2-2. Internal Structure of Printhead ..........................................2-2 Figure 2-3. ... Structure of a Nozzle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
REV.-A Figure 2-35. Operational Sequence of Ink Mechanism and Carriage Position .....................................................................2.22 Figure 2-36. Interlock Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. ..2-26 Figure 2-37. Power Supply Circuit Block Diagram .................,.............2-28 Figure 2-38. Control Circuitry Block Diagram ........................................2.
REV.-A 2.1 OPERATING PRINCIPLES OF PRINTER MECHANISM This section describes functions and operations of the printer mechanism - Model-47 10/4760. Modei-47 10/4760 is a serial type printer mechanism with a 48-nozzle printhead. This printer mechanism consists of the printhead unit, paper feed unit, ink mechanism, and sensors. Figure 2-1 shows the block diagram of the printer mechanism – Model-47 10/4760.
REV.-A 2.1.1 Printhead Mechanism The printhead of this printer employs the on-demand method, where part of the ink stored in the reservoir within the printhead is supplied into the nozzle each time ink in the nozzle chamber is injected. Figure 2-2 shows the internal structure of the printhead. The functions of the major components are explained below. ● Head damper When the carriage moves, the ink tube also moves, which results in the change of pressure within the tube.
REV.-A < Printing > This section describes how ink is injected through the nozzles. (1) Normal condition ---Piezoelectric Element is electrically charged and bent inward. Piezoelectric Element / ( ) Figure 2-4. Printing Principle (1) (2) Charging operation --When the electric charge of the piezoelectric element is gradually discharged, the element is bent outward to let ink into the pressure chamber. Pressure Chamber I 1 Figure 2-5.
REV.-A 2.1.2 Carriage Mechanism The timing belt attached to the base of the carriage is driven by the carriage motor and the pulley. This makes the carriage (printhead) move along the guide shafts. A scale made of polyester (DETECTION, PLATE, PTS) is provided along the motion range of the carriage. The optical linear encoders mounted on the carriage scan this scale and output one pulse of signal each time the carriage moves 1/1 20 inch.
REV.-A < Adjustment of Platen Gap > The platen gap must be adjusted with the head adjust lever (LEVER, GAP, ADJUST) depending on the thickness of paper. When the head adjust lever is operated, it turns the carriage guide shaft (SHAFT, CR, GUIDE, MAIN) and makes the carriage closer/farther to/from the platen. (The shaft has an eccentric cross section.) LEVER, GAP, ADJUST r \ \ L—. o Figure 2-8.
REV.-A 2.1.3 Paper Feed Mechanism The paper feeding method for this printer is divided into the friction feed method and the tractor feed method. The tractor feed method is further divided into the push tractor method and the push/pull tractor method. (This printer is provided with a standard tractor which performs “’push-type” feeding. In order to perform “push/pull-type” feeding, you must attach an optional tractor.) Also, this printer is provided with three different paper insertion.
REV.-A Push Tractor Method In this method, continuous paper is engaged to the tractor by mating the holes of paper to the pins of tractor. When the paper feed motor (STEPPING MOTOR, PF) is driven, the gears connected to the motor are rotated in the direction of the black arrows and rotate the platen, paper tension roller, and push tractor. The paper is thus driven in the direction of the white arrow as pushed by the push tractor pins and pulled by the paper tension roller.
REV.-A Push-Pull Tractor Method This method is a combination of the above-mentioned push tractor method and the pull tractor method. The push tractor pushes the paper toward the printhead, while the pull tractor pulls the paper from the printhead. This provides more accuracy in paper feeding operation. Figure 2-11 shows the push-pull tractor method from the rear feeding slot. w ,’ / Pull Tractor ,,fi .“ / \\ \~ Rear Push Tractor /,/ / t} Paper Feed ~ “?or w Figure 2-11.
REV.-A When the release lever is shifted as described above, the arrangement of the gears is changed accordingly to enable various types of paper feeding operation (such as front push tractor feeding or rear push tractor feeding) or to disable either. Therefore, you can set continuous paper to each push tractor (front and rear) and switch between the two only by shifting the lever. Platen Gear (Platen Drive) Roller Pinion Gear o Front GEAR, 34.5 Figure 2-13.
REV.-A 2.1.3.3 Paper Insertion entrance The foIlowing few pages describe the paper feeding method in relation to the paper feeding insertion. Top Entrance The top entrance is used in the friction feed method. The paper inserted through this entrance is detected by the rear PE sensor (DETECTOR ASSY., REAR). ear PE Sensor Rollers u “ Figure 2-16. Top Entrance - Friction Feed Method Rear Entrance The rear entrance is used in the tractor feed method (Push tractor method or Push-pull tractor method).
REV.-A Paper Paper Tension Roller Printhead Rear PE Sensor Figure 2-18. Rear Entrance - Push-Pull Tractor Method Front Entrance The front entrance is used in the friction feed method or the tractor feed method (Push tractor method or Push-pull tractor method). The paper inserted through this entrance is detected by the front PE sensor (DETECTOR, PE, FRONT). Paper Paper Tension Roller Printhead Roller Paper Feed Roller Figure 2-19.
REV.-A Paper Paper Tension Roller \ /- Printhead Front PE Sensor Figure 2-20. Front Entrance - Push Tractor Method Paper, Pull Tractor Paper Tesion Roller \ A x - i / 1 ‘7 I Pnnthead 4 Front PE Sensor / ~Front Push Tractor Figure 2-21. Front Entrance - Push-Pull Tractor Method 2-12 c .,. .
REV.-A 2.1.3.4 Top Edge Holder Mechanism Operation This mechanism is provided to minimize unprintable area at the top edge of paper. The top edge of paper fed around the platen is held by the top edge holder plate until the top edge is delivered to the position where the paper tension roller comes down to hold the paper. In detail, the top edge holder plate catches the top edge of the paper when the paper is initially fed around the platen, and then rotates along with the platen while holding the paper.
REV.-A c~. :. 2.1.4 Ink Mechanism ,’.,, ,..., The ink mechanism consists of the following parts. Ink cartridge (Ink cartridge holder, Ink end sensor, Ink cartridge sensor) Pump unit Pump mechanism (Pump motor) Cap mechanism Printhead cleaning mechanism (Cleaner blade, Rubbing blade) Carriage lock mechanism Wasted ink drain tank Figure 2-23 shows the system outline of the ink mechanism. , CR Valve (--) -. ., Pnnthead (iiP u Wasted Ink Drain Tank I / 1 Pump Motor / Ink Tank Figure 2-23.
REV.-A 2.1.4.1 Pump Motor The pump motor drives the pump, cleaner blade, rubbing blade, and carriage lock lever (set/reset) through several gears. Pump Motor r Cleaning Blade Drive Gear 1 . Gear I Cleaner Lever Rubbing Cleaner Blade CR Stopper Figure 2-24. Pump Motor Table 2-2. Rotational Direction and Operation of Each Part Rotational Direction Ccw Operation of Each Part Resets the carriage lock. Pumps ink into the wasted ink drain tank. Reset the cleaner blade. Resets the rubbing blade.
REV.-A 2.1.4.2 Pump Mechanism The pump draws ink from the nozzles of the printhead and sends it to the wasted ink drain tank. This operation is performed to eliminate dust./bubbles within the nozzles. Figure 2-25 illustrates the operation of the pump. When the pump motor rotates CCW, the pulley pumps in the wheel pump unit rotate in the direction of the arrow while compressing the ink tube. This makes the ink in the tube move toward the used ink pack.
REV.-A 2.1.4.3 Cap Mechanism This mechanism is provided to prevent the nozzles from drying or forming bubbles while they are not used. In this mode, when the pump is driven with the cap closely contacted to the nozzles, the internal pressure of the capped section becomes lower than that of the printhead section. This causes the ink in the printhead to flow toward the pump through the cap. The capping is automatically performed when the carriage hits the left stroke end.
REV.-A 2.1.4.4 Cleaning Mechanism and Carriage Lock Mechanism The cleaning operation consists of rubbing operation and cleaner blade operation. (The rubbing operation is performed to remove head preserving liquid, ink, or dust which is heavily adhered to the surface of the printhead, while the cleaner blade operation is performed to remove ink or dust lightly stuck to the surface of the printhead.) In the rubbing operation, the ink, etc.
REV.-A The pad and blade is attached to the cleaner lever. When the pump motor rotates clockwise, the spur gear (20) is rotated and thus sets the lever forward. When the pump motor rotates counter-clockwise, the cleaner lever is reset. The spur gear will be disengaged from the cleaner lever as soon as the lever is either set or reset. Cleaner Lever Printhead Figure 2-30. Set/Reset of Cleaner Lever The cleaner lever is also used as a carriage lock lever.
REV.-A 2.1.4.5 ink Cartridge and Ink End Sensor Mechanism The structure of the ink cartridge is shown in Figure 2-32. The ink cartridge contains an ink pack and an ink end detection plate. The detection pIate gradually sticks out as the ink inside the cartridge runs short. The ink end sensor (DETECTOR ASSY., INK) is designed to detect this plate. Ink End Detection Plate \ c Ink Pack / / [: Figure 2-32. Internal Structure of Ink Cartridge Figure 2-33 shows the structure of the ink cartridge holder.
REV.-A 2.1.4.6 Wasted Ink Drain Tank Used ink is collected into the wasted ink drain tank. The wasted ink drain tank has the absorber to collect used ink through the tube, and the opening which lets out the vapor from ink. This tank is provided with a sufficient capacity to collect the waste ink that is used during the whole printer life. From Pump Wasted Ink II I 1 11 1 Absorber J Figure 2-34.
REV.-A 2.1.4.7 Operational Sequence of Ink Mechanism Ink Mechanism comprises of various steps of operation. The following are some of the basic steps of operation. ● Ink flushing operation In this operation, the printhead is moved to the position where the cap covers the nozzles (the refresh position) and then ink is injected from all the nozzles toward the cap.
REV.-A The basic steps of operation described above are combined in many ways to meet various conditions of the printer as described below. (1) Power ON operation At time of power on, four different ways of operation are possible depending on the carriage position and timer value. They are described in a), b), c), d) below.
REV.-A a) CL1 (Normal cleaning) This operation consists of the cleaner blade operation-1, negative pressure release operation, and cleaner blade operation-2. b) CL2 (Intensive cleaning) This operation is performed when the cleaning switch is pressed before 200 lines are printed after the last cleaning operation. In other words, the intensive cleaning is performed when the normal cleaning fails to correct abnormalities.
REV.-A a) Initial charge operation-1 This operation is performed when the printhead is not capped at the time the user operates the initial charge operation. It consists of the cleaner blade operation-1, ink charge operation for 60 seconds, negative pressure release operation, rubbing operation for 5 times, ink charge operation for 5 seconds, and negative pressure release operation.
REV.-A (6) Wasted ink drain tank replacement operation In normal use condition, this tank has a sufficient capacity to collect all the ink to be wasted during the whole printer life. However, if an unexpectedly large amount of ink is wasted in excessive cleaning operations or power on operations, the tank may be fulfilled. In this case, the wasted ink drain tank replacement message will be displayed to urge the user to replace the tank.
REV.-A 2.2 OPERATING PRINCIPLES OF POWER SUPPLY CIRCUITRY The power supply circuitry of this printer is provided with either C076PSB board (120V) or C076PSE board (220/240 V). Both boards operate in the same way although the elements in the primary circuit are partly different. The power supply unit supplies DC voltage which is used for controlling the printer of driving the printer mechanism. Table 2-4 shows the ratings of the power supply board. Table 2-4.
REV.-A 2) +35 VDC over voltage protection circuit When the voltage of the +35 VDC line exceeds a certain value (+36V), the switching circuit is turned off to stop the generation of +35 VDC voltage. 3) + 35VDC under voltage protection circuit When the voltage of the +35VDC line goes lower than a certain value, the switching circuit is turned off to stop the generation of +35 VDC voltage.
REV.-A 2.3 OPERATING PRINCIPLES OF CONTROL CIRCUITRY This section describes the operating principles of the control circuitry of this printer - C076 MAIN board. 2.3.1 Control Circuitry Overview The C076 MAIN board is provided with wPD70325 (V25 +) (9.5 MHz) – a 16-bit one-chip microprocessor, E05A65 - a gate array with memory management function, and E05A48 – a gate array to control DC motors. Figure 2-38 shows the control circuitry block diagram.
REV.-A Table 2-6 lists the functions of major elements on the C076 MAIN board. Table 2-6. Major Elements on C076 MAIN Board and Their Functions Element r Location ~ wPD70325 (V25 +) IC5 E05A65 Ic12 Function The CPU of this board. It receives data from the host and stores (V25 +) ‘ it in the input buffer in PS-RAM by interrupting. The stored data is then converted to image data and stored in the image buffer in PS-RAM.
REV.-A 2.3.2 Reset Circuit When the power in turned on, the reset IC(MB3771 ), which monitors the + 5 VDC line, keeps outputting RESET signals until +5 VDC is stable. This controller can also reset itself by setting RSTRG signal(160 pin of E05A65 gate array) to LOW. The block diagram of this circuit is shown in Figure 2-39. GA E05A65 IC12 RSTRG +5V A 160 MB3771 IC21 6 8 RESET Figure 2-39. Reset Circuit Block Diagram 2.3.
REV.-A 2.3.4 Paper Feed Motor Drive Circuit A stepping motor is used in the paper feed motor drive circuit of this printer. The motor is driven by 2-2 phase excitation and constant-current arrangement. For a single pulse, paper is fed 1/360 inch (minimum value). The acceleration/deceleration control is not applied to the paper feed rate less than 3 steps. The feeding speed is varied depending on the type of paper, etc.
REV.-A 2.3.5 Carriage Motor Drive Circuit This printer uses a DC motor for the carriage drive. To drive the DC motor at a constant speed, the gate array E05A48 monitors the encoder signals and then supplies proper voltage to the motor by turning the motor power on/off. The gate array can recognize rotational direction of the motor (i.e. moving direction of the carriage) because there are two encoders attached on the carriage with 90-degree phase difference.
REV.-A 2.3.6 Printhead Drive Circuit Figure 2-43 shows the printhead drive circuit. The print data developed by CPU is transferred to the head control gate array - E05A65 (ICI 2) via data bus. The data for 48 nozzles stored in E05A65 is serially transmitted from HDDAT port to the head driver - ~PD 1632 (IC8,9). HDCLK is a clock for this serial transmission. The E05A65 transmits HDSTB signal as soon as the data transmission for 48 nozzles is completed. The head is controlled by CHG and DSCHG pulses.
REV.-A (1) Charge/discharge circuit Figure 2-44 shows the chargeidischarge circuit, VH A CHG o R35 AAA ~Mnchage DCH Q3 yPDl 6322 (IC8, 9) Rs G ALDCHG o HI-48 o- DSCHG 0 - - 1 GH Figure 2-44. Charge/Discharge Circuit < Charge pulse > When the gate array (E05A65) outputs HIGH pulse from CHG port, the transistors (Q3,9) go ON and thus the Vh voltage charges the piezoelectric elements (PZD) through the diode (DCH) and resistor (RCH). Figure 2-45 shows the head condition at this time.
REV.-A Figure 2-47 shows the timing for discharge/charge pulse. Figure 247. Timing for Discharge/Charge Pulse (2) Printhead Voltage Supply Circuit The viscosity of ink is subject to change due to the temperature. If the viscosity is too high, ink injection becomes difficult. To eliminate this difficulty, the head drive voltage (Vh: the +35 VDC voltage boosted to 83 -123.7 VDC in this circuit) is controlled based on the ink temperature detected by the thermistor. c’< ., \ .
REV.-A 2.3.8 TE Motor Drive Circuit A stepping motor is used to drive the TE motor. The phase data for the stepping motor is transmitted from the port on E05A65 to the driver - PU 1501, and controls the stepping motor by constant-voltage method. The TE motor is supplied with + 5 VDC in hold mode, and +35 VDC in drive mode. This switching is controlled through the port PD3 on E05A65.
REV.-A 2.3.10 EEPROM Control Circuit This printer is provided with an EEPROM to store the data such as panel settings, paper position data (Paper cut position/Current printed line), wasted ink drain tank replacement counter, etc. when the main power is OFF. When the main power is ON, the data is stored in the RAM. But the data in the RAM will be erased as soon as the main power is turned off.
REV.-A CHAPTER 3 DISASSEMBLY AND ASSEMBLY ..... 3 . 1 O V E R V I E W . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 3.1.1 Precautions for Disassembling the Printer . . . . . . . . . . . . . . . . . . . . . . 3-1 . 3 . 1 . 2 T o o l s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
REV.-A LIST OF FIGURES Figure 3-1. How to Make a False Ink Cartridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2 Figure 3-2. .. Releasing Carriage Lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3 Figure 3-3. . -5 Setting Shockproof Attachments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Figure 3-4. Fastening Tube Set Screw . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
REV.-A Figure 3-36. Disassembly of Frame Assembly, RIGHT . . . . . . . . . . . . . . . . . . . . . . 3-33 ... Figure 3-37. Setting Release Lever . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-34 Figure 3-38. Disassembly of Tractor Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-35 ..... Figure 3-39. Tractor Set Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
REV.-A 3.1 OVERVIEW This section describes the various points to note when disassembling, assembling and transporting the printer. 3.1.1 Precautions for Disassembling the Printer Follow the precautions below when disassembling the printer. WARNING ● Disconnect the power cable before disassembling/assembling/adjusting the printer. ● Wear glasses to protect your eyes against ink. If your eyes or any injured part of body get ink, wash it away with fresh water and see the doctor immediately.
REV.-A Since this printer employs the ink mechanism, it requires special handling as follows. (1) Ink handling before/after repair The ink path of the ink-jet printer is filled with ink for the whole operating period. Because of this, it is necessary to take the following steps before/after repair. Table 3-1. Ink Handling Steps Trouble expected Condition Countermeasures When replacing printer mechanism, head, or pump. Ink leakage Cap the printhead. Discharge all the ink.
REV.-A < Filling preservation liquid> If it seems to take more than a week before the user receives the printer, fill the printhead with preservation liquid. You can fill the liquid in the following procedure: [Step 1] Set the false ink cartridge on the ink cartridge holder. [Step 2] Insert the preservation liquid charge identity ROM module (TRANSPORTATION LIQUID FILL UP PROGRAM CARTRIDGE #F588) into the ROM cartridge slot. ISteo 3] Power ON.
REV.-A (2) Wasted Ink Drain Tank This printer is provided with the wasted ink drain tank, which is designed to have a sufficient capacity @ to collect the waste ink that is used during the whole printer life. However, it must be replaced in the following conditions. ● The “OVERFLOW” message is displayed. (All the LEDs on the panel turn blinking and no print data will be accepted.
REV.-A (3) Transportation Make sure the following preparations are properly made before delivering the printer. ● Capping ● Removing ink cartridge ● Setting shockproof attachments ● Packaging St b Packing Material Protective Sheet Packing Material Figure 3-3.
REV.-A The procedures (1) (2) (3) described above are listed in Table 3-2. (Also refer to Table 3-7) Table 3-2.
REV.-A 3.1.2 TOOIS Table 3-3 and 3-4 list the recommended tools and instruments used for disassembling/assembling, adjusting, or measuring purposes. Be sure to use a proper tool for each step or operation, especially when servicing the ink tube in the pump unit. As shown in Figure 3-4, you must use a specified torque wrench to tighten the tube set screw. If tightened to an excessive degree, the O-ring may break or crack to cause ink leakage.
REV.-A < Screw designation> Ail small parts, such as screws and washers, are indicated by abbreviations. Table 3-5. Abbreviations List of Small Parts I Part Name Abbreviation C.P.S. Screw Cross-recessed Pan-head S-tight screw C.B. B. Screw Cross-recessed Bind-head B-tight screw C.C.U. Screw Cross-recessed Cup-head Uska screw C. B. S-tite Screw Cross-recessed Bind-head S-tight screw Cross-recessed Bind-head screw C.B. Screw C. P. B-tite Screw Cross-recessed Pan-head B-tight screw C.B.S.
REV.-A 3.1.3 Service Check List After servicing, be sure to check the printer for any abnormality using the following list. Table 3-7.
REV.-A 3.2 DISASSEMBLY AND ASSEMBLY e This chapter describes procedures for disassembling main components of this printer. Unless otherwise specified, the disassembled unit or components can be reassembled simply by performing the disassembly procedure in the inverted sequence. The assembly procedure is, therefore, omitted in this manual. Cautions for the assembly procedures are shown as “ASSEMBLY POINTS”. Adjustments required after assembling are shown as “REQUIRED ADJUSTMENT ITEMS”.
REV.-A 3.2.1 Housing Removal This paragraph describes the procedures for removing the HOUSINGS, FRONT and UPPER. [Step 1] Remove the SHEET GUIDE ASSY., REAR, the COVER, PRINTER, the COVER, FRONT, the SHEET GUIDE ASSY., FRONT, the tractor, and the knob. [Step 2] Unscrew C.B. B. screw (M3 X 12) attaching COVER, GEAR to the HOUSING, UPPER, to remove the COVER, GEAR. [Step 3] Unscrew C.B. screw (M4 X 16) attaching the HOUSING, UPPER and C.B.B. screw (M3 X 12) attaching the HOUSING, FRONT to the HOUSING, UPPER.
REV.-A [Step 6] Disconnect the connector that connects the interlock switch to the resistor at the rear of the printer mechanism. [Step 7] Raise the front side of the HOUSING, UPPER with the rear side held. Figure 3-8. Housing Removal (3) 3.2.2 Printhead Replacement This section describes the procedures for disassembly and assembly of the printhead. [Step 1] Discharge ink. (Refer to section 3.1. 1.) [Step 2 ] Remove the housing. (Refer to section 3.2. 1.) [Step 3] Remove C.B.S.
REV.-A ASSEMBLY POINTS When assemble the printhead, follow the procedures shown below. [Step 1] Verify that the PIN, ADJUST on the carriage is set in the direction as shown in the Figurt below. r, II PIN, ADJUST I nn l-l I I I I \ Mark Mark ~.arriw Figure 3-10. Setting PIN, ADJUST Direction [Step 2] Engage the tube set screw and O-ring onto the TUBE, SUPPLY, INK.
REV.-A REQUIRED ADJUSTMENT ITEMS If you have disassembled/assembled the printhead, make the following adjustment after repair. ● Printhead slant adjustment (Refer to section 4.5. 1.) If you have replaced the printhead, make the following adjustment in the specified sequence, (1) Platen gap adjustment (Refer to section 4.2.) (2) Printhead drive voltage adjustment (Refer to section 4.4.) 3.2.
REV.-A 3.2.4 Printer Mechanism Removal This section describes how to remove the printer mechanism. WARNING When working with the printer mechanism, take sufficient care in handling the ink. Carefully read the precautions in 3.1.1 before beginning the work. CAUTION Discharge ink from the printer before removing the printer mechanism. [Step 1] Remove the housing. (Refer to section 3.2. 1.) [Step 2 ] Discharge the ink in the ink path of the printer mechanism. (Refer to section 3.1. 1.) [Step 3] Unscrew 3 C.
REV.-A [Step7] Disconnect the following connectors, which connect the printer mechanism to the MAIN board; CN 13 (Blue/6 pins), CN 14 (White/6 pins), CN 12 (White/2 pins), CN15 (White/2 pins), CN 18 (FPC/26 pins), CN 17 (FPC/36 pins), CN 11 (White/3 pins), CN 10 (Blue/3 pins), CN9 (Yellow/2 pins), CN8 (White/2 pins). [ S t e p 8 ] Remove the 4 screws (PRINTER MECHANISM MOUNTING SCREW) fastening the printer mechanism to the HOUSING, LOWER.
REV.-A REQUIRED ADJUSTMENT ITEMS If you have replaced the printer mechanism, make the following adjustment in the specified sequence. (1) Prlnthead drive voltage adjustment (Refer to section 4.4.) (2) Print position adjustment (Refer to section 4.5.2.) F- 3.2.5 Circuit Board Removal This section describes how to remove the MAIN board and the POWER SUPPLY board. 3.2.5.1 MAIN Board Removal WARNING When working with the MAIN board, take sufficient care in handling the battery.
REV.-A ASSEMBLY POINTS ● If you have replaced the MAIN board, take the weight of the wasted ink drain ink tank and replace a it if the weight exceeds 240g. ● If you have replaced the MAIN board, reset the wasted ink tank replacement counter before making the following adjustments. REQUIRED ADJUSTMENT ITEMS If you have replaced the printer mechanism, make the following adjustment in the specified sequence. (1) Printhead drive voltage adjustment (Refer to section 4.4.
REV.-A 3.2.6 HOLDER ASSY., INK CARTRIDGE Removal [Step 1] Remove the housing. (Refer to section 3.2.1.) [Step2] Remove the printer mechanism. (Refer to section 3.2.4) [Step 3] Unscrew C.B.B. screw (M3X 12) which fastens the HOLDER ASSY., INK CARTRIDGE to the HOUSING, LOWER to remove the HOLDER ASSY., INK CARTRIDGE together with the TORSION SPRING, 3490 and the COVER, HOLDER, INK CARTRIDGE. A$’”-o 1 .+, HOLDER ASSY., INK CARTRIDGE @ ‘“ f -/ — ING, LOWER Figure 3-18. HOLDER ASSY.
REV.-A 3.2.7 Printer Mechanism Disassembly This section describes how to disassemble the printer mechanism. WARNING When working with the printer mechanism, take sufficient care in handling the ink. Carefully read the precautions in 3.1.1 before beginning the work. 3.2.7.1 Disassembly of PAPER HOLDING ASSY. [Step 1] Remove the housing. (Refer to section 3.2.1.) [Step 2] Remove the TORSION SPRING, 6750 (LEFT) from the hook on the left frame.
REV.-A 3.2.7.2 Disassembly of CAP ASSY. [Step 1] Remove the housing. (Refer to section 3.2. 1.) [Step2] Remove the printer mechanism. (Refer to section 3.2.4.) [Step 3] Unscrew the 3 screws (C.B.S. screw (M3x8)) which fasten the FRAME, STRENGTHEN LEFT, and remove the FRAME, STRENGTHEN RIGHT. [Step 4] Unscrew C.B.B. screw (M3x8)which fastens the CAP ASSY. to the FRAME, FRONT, and remove the CAP ASSY.. [Step 5] Separate the tube of the PUMP ASSY. from the CAP ASSY.. CAP ASSY. FRAME, STRENG THEN RIGHT I C.B.
REV.-A 3.2.7.3 Disassembly of PUMP ASSY. and CLEANER ASSY. [Step 1] Remove the housing. (Refer to section 3.2. 1.) [Step 2] Remove the printer mechanism. (Refer to section 3.2.4.) [Step 3] Remove the CAP ASSY.. (Refer to section 3.2.7.2.) [Step 4] Remove the TUBE, SUPPLY, INK, from the PUMP ASSY.. [Step 5] Unscrew two screws (C.B.S. screw (M3X 8)) which fasten the PUMP ASSY. to the frame, and remove the PUMP ASSY.. [Step 6] Separate the CLEANER ASSY. from the frame.
REV.-A 3.2.7.4 FRAME, FRONT Removal [Step 1] Remove the housing. (Refer to section 3.2. 1.) [Step2] Remove the printer mechanism. (Refer to section 3.2.4) [Step3] Remove the CAP ASSY.. (Referto section 3.2.7.2.) [Step4] Remove the TUBE, SUPPLY, INK from the hook on the PUMP ASSY.. [Step 5] Remove the harness of the platen gap sensor from the clamp in the rear of the printer mechanism. [Step 6] Unscrew C.B.S. screw (M3 X 8) which fastens the resistor to the rear of the printer, and remove the resistor.
REV.-A 3.2.7.5 Carriage Motor (DC MOTOR, CR) Removal [Step 1] Remove the housing. (Refer to section 3.2.1.) [Step 2] Remove the printer mechanism. (Refer to section 3.2.4.) [Step 3] Remove the CAP ASSY.. (Refer to section 3.2.7.2.) [Step 4] Remove the FRAME, FRONT. (Refer to section 3.2.7.4.) [Step 5] Unscrew the 3 screws (C.B.S. screw (M3 X 8)) which fasten the MOUNTING PLATE ASSY., PULLEY, DRIVEN to the FRAME, FRONT, and remove the timing belt from the pulley. [Step 6] Unscrew the 4 screws (C.C.
REV.-A 3.2.7.6 Disassembly of Carriage [Step 1] Remove the housing. (Refer to section 3.2. 1.) [Step 2] Remove the printer mechanism. (Refer to section 3.2.4.) [Step 3] Remove the printhead. (Refer to section 3.2.2.) [Step 4] Remove the CAP ASSY.. (Refer to section 3.2.7.2.) [Step 5] Remove the FRAME, FRONT. (Refer to section 3.2.7.4.) [Step 6] Remove the HOLDER, CABLE, PRINT HEAD which fastens FPC to the FRAME, FRONT, and release one end of the FPC. [Step 7] Unscrew the 3 screws (C.B.S.
REV.-A ‘ss’”6” ‘“’N’s ~ When engaging the timing belt to the carriage, make sure that 3 grooves can be seen at the end of the belt as shown in Figure 3-27. ,H I 1 1 Timing Belt : t ... e’” .’, 3 grooves Figure 3-27. Engaging Timing Belt REQUIRED ADJUSTMENT ITEMS If you have reassembled the carriage, make the following adjustment in the specified sequence. (1) Timing belt tension adjustment (Refer to section 4.3.) (2) Platen gap adjustment (Refer to section 4. 1.
REV.-A 3.2.7.7 STEPPING MOTOR, PF Removal [Step 1] Remove the housing. (Refer to section 3.2. 1.) [Step2] Remove the printer mechanism. (Refer to section 3.2.3) [Step 3] Unscrew the CUP screw (M3X8) and the C.B.S. screw (M3X8) which fasten the STEPPING MOTOR, PF to the FRAME, SUB, RIGHT, and remove the STEPPING MOTOR, PF. STEPPING MOTOR, PF \ CUP Screw (M3x8) A., ‘~ , ~ , d >.; ‘d GHT “ \ f P C.B.S. Screw (M3 X 8) Figure 3-28. STEPPING MOTOR, PF Removal 3.2.7.
REV.-A 3.2.7.9 Disassembly of PLATEN ASSY. [Step 1] Remove the housing. (Refer to section 3.2.1.) [Step 2] Remove the printer mechanism. (Refer to section 3.2.4.) [Step 3] Remove the CAP ASSY.. (Refer to section 3.2.7.2.) [Step 4] Remove the FRAME, FRONT. (Refer to section 3.2.7.4.) [Step 5] Remove the PAPER HOLDING ASSY.. (Refer to section 3.2.7.1.) [Step6] Unscrew the2screws (C. B. S.screw(M3X 8))which fasten the COVER, PLATEN tothe frame, LEFT/RIGHT, and remove the COVER, PLATEN.
REV.-A [Step 12] Rotate the HOLDER, PLATEN, RIGHT and HOLDER, PLATEN, LEFT which fasten the PLATEN ASSY. to the frame, LEFT/RIGHT, and remove the PLATEN ASSY.. HOLDER, PLATEN, LEFT/RIGHT Figure 3-31. Disassembly of PLATEN ASSY. (2) ASSEMBLY POINTS When assembling the GUIDE, PAPER EJECT be sure to hook the TORSION SPRING 700 to the GUIDE PAPER EJECT. When attaching the SENSOR SUB ASSY., PW make sure the adhesive double coated tape is completely covered by FPC.
REV.-A I REQUIRED ADJUSTMENT ITEMS If you have reassembled the carriage, make the following adjustment in the specified sequence. (1) Timing belt tension adjustment (Refer to section 4.3.) (2) Platen gap adjustment (Refer to section 4. 1.) (3) Platen gap adjustment (Refer to section 4.2.) (4) Printhead slant adjustment (Refer to section 4.5.1) (5) Print position adjustment (Refer to section 4.5.2) C2 .!. ‘.; ,. c..,.-\ .
REV.-A 3.2.7.10 Disassembly of PAPER GUIDE IStepl] Remove thehousing. (Refer to section 3.2.1.) [Step2] Remove the printer mechanism. (Refer to section 3.2.4) [Step3] Remove the CAP ASSY.. (Refer to section 3.2.7.2) [Step4] Remove the FRAME, FRONT. (Refer to section 3.2.7.4) [Step5] Remove the PAPER HOLDING ASSY.. (Refer to section 3.2.7.l) [Step6] Remove the PLATEN ASSY.. (Refer to section 3.2,7.9) [Step7] Remove the STEPPING MOTOR, TOP EDGE HOLDER. (Referto section 3.2.7.8) [Step8] Unscrew the 3screws(C.
REV.-A ASSEMBLY POINTS @ When attaching the FRAME ASSY., RIGHT to the PAPER GUIDE, make sure the SHAFT, RELEASE of the PAPER GUIDE, RIGHT is set in the proper direction as shown below. PAPER GUIDE Figure 3-35. Direction of SHAFT, RELEASE I REQUIRED ADJUSTMENT ITEMS If you have reassembled the carriage, make the following adjustment in the specified sequence. (1) Timing belt tension adjustment (Refer to section 4.3.) (2) Platen gap adjustment (Refer to section 4.1.
REV.-A 3.2.7.11 Disassembly of FRAME ASSY., RIGHT [Step 1] Remove the housing. (Refer to section 3.2. 1.) [Step 2] Remove the printer mechanism. (Refer to section 3.2.4.) [Step 3] Remove the CAP ASSY.. (Refer to section 3.2.7.2.) [Step 4] Remove the FRAME, FRONT. (Refer to section 3.2.7.4.) [Step 5] Remove the STEPPING MOTOR, PF. (Refer to section 3.2.7.7.) [Step 6] Remove the PAPER HOLDING ASSY.. (Refer to section 3.2.7. 1.) [Step 7] Remove the PLATEN ASSY.. (Refer to section 3.2.7.9.
REV.-A ASSEMBLY POINTS @ When attaching the release lever to the FRAME ASSY., RIGHT, make sure that all the teeth of the gap gear are fully engaged with the teeth of the release lever. H- I I Release Lever INTERMITTED Gear Posifien I Figure 3-37. Setting Release Lever ,: Z.,. c REQUIRED ADJUSTMENT ITEMS If you have reassembled the carriage, make the following adjustment in the specified sequence. (1) Timing belt tension adjustment (Refer to section 4.3.
3.2.7.12 Disassembly of TRACTOR ASSY. [Step 1] Remove the TRACTOR GEARS (left/right) attached on the SHAFT, TR, DRIVE, and remove the FRAME, TR, (left/right). [Step 2] Remove the E-rings (6) attached on the SHAFT, TR, DRIVE, and remove the tractors (left/right). TRACTOR GEAR FRAME, TR, LEFT \ ,,../” / <.., ....,, .,. LEVER, Th, RIGHT Figure 3-38.
REV.-A CHAPTER 4 ADJUSTMENTS 4.1 PLATEN GAP PARALLELISM ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 4.2 PLATEN GAP ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2 4.3 TIMING BELT TENSION ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4 4 . 4 P R I N T H E A D D R I V E V O L T A G E A D J U S T M E N T . . . . . . . . . . . . . . . . . . . .
REV.-A This chapter describes the various adjustments you should make after you disassemble or replace any parts or components that require adjustment. Needless to say, you should also make adjustment in any case if the printer does not function properly or print quality is not good enough. Other conditions that require adjustment are described in this chapter. WARNING Disconnect the power supply cable from the printer whenever you work with the printer. (Unless otherwise specified) 4.
REV.-A [Step 4] Adjust the LEVER, PARALLEL, ADJUST so that the long needle of the dial gauge indicates a constant value at any point on the platen with an allowance of 3 divisions (0.03 mm) when you move the carriage to the left and right. /’- Carriage SHAH, CR, MAIN LEVER, PARALLEL,ADJUST Figure 4-2. Platen Gap Parallelism Adjustment [Step 5] Remove the dial gauge and the dial gauge base. [Step 6] Install the printhead to the carriage. (Refer to section 3.2.2.
REV.-A [Step2] Insert the thickness gauge (exclusively made by EPSON) between the platen and the printhead, and rotate the SHAFT, CR, MAIN so that the head is pressed lightly against the head. When rotating the SHAFT, CR, MAIN, you can make use of the notch at the right side of the shaft. T 1.00 mm &O.05 mm (x ~ Prmthead and Carriage o Platen \ SHAFT, CR, MAIN Figure 4-4. Platen Gap Adjustment [Step 3] Set the adjust lever to the normal paper printing position and tighten the FLANGE NUT(M4).
REV.-A 4.3 TIMING BELT TENSION ADJUSTMENT This adjustment is to change the tension of the timing belt to a proper level. If this adjustment is not performed properly, bi-directional printing settings will be interfered. This adjustment is required when you loosened the timing belt for disassembling or assembling the printer or when the bi-directional print position cannot be aligned. [Step 1] Center the carriage. [Step 2] Loosen the 3 screws (C.B.S. screw (M3X8))attachin9 the MOUNTING PLATE ASSY.
REV.-A 4.4 PRINTHEAD DRIVE VOLTAGE ADJUSTMENT Printhead drive voltage of each printhead should be adjusted individually, because all printheads are not exactly of the same characteristics. If it is not adjusted properly, print quality will be degraded. This adjustment is required when the printhead or the printer mechanism is replaced. It is also required when the MAIN board is replaced.
Table 4-1. Head Drive Voltage and Jumper Setting Head Drive Voltage (V) 122.2- 123.7 Jumper 5 Setting Jumper 6 Setting A x 120.7- 122.1 Y 118.8- 120.6 z 117.1 - 118.7 B x 115.5- 1 1 7 . 0 Y 113.8- 115.4 z 112.4- 113.7 c x 110.8- 112.3 Y 108.8- 110.7 z 106.8- 108.7 D x 105.3- 106.7 Y 103.7- 105.2 z 102.0- 103.6 E x 100.4- 101.9 Y )8.5 - 100.3 z )7.0 - 9 8 . 4 F x )5.2 - 9 6 . 9 Y )3.6 - 95.1 z )2.0 - 93.5 G x 10.4 - 91.9 Y 18.5 -90.3 z 6.8- 88.4 H x 5.
REV.-A [Step4] When only the MAIN board is replaced: Set the jumpers (5 and 6) on the MAIN board according to the settings confirmed in Step 3, and install the main board to HOUSING, LOWER. When either the printhead or the printer mechanism is replaced: Set the jumpers (5 and 6) on the MAIN board according to the settings confirmed in Step 3. MAIN Board Jumper Figure 4-7. Jumper Setting [Step5] Connect a dummy resistor (20. OKohm~ 1 %) (#F59 1) to connector CN 16 on the MAIN board.
REV.-A 4.5 PRINT ADJUSTMENT — The print adjustment can be divided into the printhead inclination adjustment and print position adjustment. These adjustments can be performed by running the special program on the personal computer (EPSON PC/EQUITY or 100% IBM PC compatible machine) connected to the printer. 4.5.1 Printhead Slant Adjustment If the printhead is not installed at the right angle to the carriage, the characters will not be printed at the right angle.
REV.-A [Step 1 1] Center the carriage and loosen the screw (fastening the printhead)on the righthand side. Then, holding the head with the hand, turn the PIN, ADJUST. The PIN, ADJUST can be turned to 5 different positions. Printhead . inthead Fixed Screw PIN, ADJUST Figure 4-9. Head Inclination Adjustment [Step 12] Turn the PIN, ADJUST to a proper position and tighten the screw loosened in Step 10. [Step 13] Press the SPACE key and print the check pattern again.
REV.-A [Step 6] When “’80 COLUMN...1, 136 COLUMN...2° is displayed, select 80 column or 136 column for your machine. ● [Step 7] When “BI-D...1, HEAD TILT...2, END...E” is displayed, select ‘“BI-D” by entering “l’”. [Step 8] When “PRINTER No.?” is displayed, enter the applicable printer number and press the return key. [Step 9] Print the odd-numbered lines at SPEEDO and even-numbered lines at SPEED1 both in uni-directional print mode.
REV.-A CHAPTER 5 TROUBLESHOOTING ..... 5 . 1 O V E R V I E W . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1 5.2 REPAIR BY UNIT REPLACEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .5-3 .. 5.3 REPAIR OF POWER SUPPLY BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-11 5.
REV.-A 5.1 OVERVIEW even a single trouble may exhibit a variety of The task of troubleshooting is not an easy job, symptoms. Figure 5-1 show a flowchart, by which you can easily determine the cause of trouble. I UnitRepla@rnent I Service Check List I I I-=7-l Figure 5-1. Troubleshooting Procedure Table 5-1 and 5-2 lists the information related to the troubleshooting operation. Table 5-1. Resistance of Motor Coil Specifications Unit Name Carriage motor Coil Resistance 7.
REV.-A In order to check the waveforms of the MAIN board, you can use the extension cable provided for this printer. You can remove the MAIN board from the lowercase and still check its waveforms by connecting the board to the printer mechanism with these cables. The following table shows extension cables and connecting points. Table 5-3. Extension Cables Connector on MAIN Board Connecting Point on Printer Mechanism Extension Cable Part No.
REV.-A 5.2 REPAIR BY UNIT REPLACEMENT When a problem occurs, you can separate a particular unit that is responsible for the particular problem by referring to the symptoms listed below. Refer to Table 5-4, identify what the problem is, and then perform the checks according to the corresponding flowchart. Table 5-4. Symptoms and Reference Pages Contents Symptom Reference Page Printer fails to operate at time of power on. “ Control panel LEDs do not light up. . Carriage and pump do not operate.
REV.-A (1) Printer fails to operate at time of power on. Use the correct input voltage. Yes Replace the fuse and pull out CN4 on the MAIN board. No Check the outpui volta e of the power boar1. “Yes No ● 7 Replace the power board. Replace the MAIN board. ND No 1 Replace the printer mechanism.
(2) Error is detected. Read the error message displayed (Refer to table 5-2) ~ Yes Check the cable connection on the control panel. Connect the cable Replace the control Panel. Turn off the power supply and try to move the carriage manually. Yes No Replace the printer mechanism. + Yes Yes No 4 A I I I Replace the MAIN board.
‘r’es Replace the HOLDER ASSY., INK CARTRIDGE. Yes Wasted ink drain tank overflow. I Y 57 Replace the MAIN board.
(3) Print failure occurs during self test. Set the adjust lever in the correct position and execute self-test. ~ No I No I connected correctly ? . . Yes dot is missing or < print density is incorrct. ) v Yes Connect each connector correctly. I No ● Excute the adjustment for printhead slant and Bi-d print. Press the CLEANING SW Yes Yes v ND Replace the printhead, I No Yes Replace the printer mechanism.
REV.-A (4) Paper is not fed normally. anfirm that there are no stray pieces of paper or anything else nothing abnormal within the paper the paper path. Remove any stray pieces or other foreign objects L I Turn of+ the power No (!) I < turn smoothly ? A Replace the printer mechanism. Yes Replace the MAIN board. < No b Was the paper feed No motor coil damaged by overheating ? * Yes Replace the printer mechanism. Replace the MAIN board. ‘ r 6 .- AI / v I ID ND * 63 :’..
REV.-A (5) Control panel does not function normally. No Yes Connect the control panel cable correctly, No 4 Replace the control panel. F7 ND No Yes Replace the MAIN board.
REV.-A (6) The printer does not function normally in on-line mode. T Execute self-test. Refer to other sedon for troubleshooting. Check the setup values between printer and host computer. .. .. . (7 .) Yes Parallel Replace option interface board. > No No < Adjust the setup vakIe$$. Replace the interface cable between printer and host computer. 4 No I Yes END * c,. ,.,> :,’ Replace the MAIN board.
REV.-A 5.3 REPAIR OF POWER SUPPLY BOARD This section describes the problems related to the power supply board. The table below provides various symptoms, likely causes, and checkpoints. The checkpoints refer to waveforms, resistance, and other values to be checked to evaluate the operation of each component. Check these values and take the appropriate action. Table 5-5.
REV.-A Table 5-5. Repair of Power Supply Board (Cont.) Symptom Conditon The printer does not opcrate at all. +5V line is dead. Cause Checkpoint Solution +35V line is dead. Check the +35V line. IC51 is dead. Check the oscillation waveform and switching waveform of IC51. Replace IC51 . + T/ 1f / ./ A /– { P +t+t 4ttt- 3 2V 20 $s * Oscillation Waveform (IC51, pin 5) I \ I - “d- !’- *++H-1-P-tttl! i+l+ $ 1 1 I mk’ * Switching Waveform (IC51, pin 8) Replace Q51 or Q52.
REV.-A 5.4 REPAIR OF MAIN BOARD This section describes the problems related to the MAIN board. The table below provides various symptoms, likely causes, and checkpoints. The checkpoints refer to waveforms, resistance, and other values to be checked to evaluate the operation of each component. Check these values and take the appropriate action. Table 5-6.
REV.-A Tmhln Rcmair nf-.M. a n. . .i . ..-~-.. . ““. ” K-G - -. S y m p t o m I Conditon The printer does not oPcrate at ail. The CPU does not operate. B o a r d (Cont.) . . —-—- — . — ——. -—. Solution Checkpoint Cause Replace CG or RAM. Either CG or RAM is defective. CPU is defective. Check the oscillator signal at either pin 53 or 54 of the CPU. If signal is detected, replace CPU. Otherwise replace CR2. ii-i-t -l-t-i+ -m-t -l-H+ -tttt+tu-l-l-l+-Hi+ * -t & I t 20ms I c:.,.
Table 5-6. Repair of the Main Board (Cont.) Symptom Conditon The carriage does not operate normally. The carriage does not operate at all. Checkpoint Cause Solution IC 10 is defective. Check the oscillator waveform at pins 27, 25, 32 and 31 of ICIO. Replace ICI 7 is defective. At IC 17, compare the waveform at pin 2 with that at pin 4. Replace 5-15 Ic 10. Ic17.
REV.-A T=hlta Ransir nf the M..a ----i n B—o--a r d- (Cont.) , -— ...., , ““. RR w w. .. -~.-.. -. . . . .
Table 5-6. Repair of the Main Board (Cont.) Symptom The top edge holding mechanism does not operate normally. Conditon Checkpoint Cause Solution Replace Ic12. TE motor ICI 2 is Check the output signal at pin 21, 22, 23 and does not rotate at all. defective. 24 of IC 12. ICI 8 is defective. Check the output signal of IC 18. Replace IC 18. The pump does not opcrate normally The pump motor does not rotate at all. IC12 or IC16 is defective.
REV.-A 5.5 REPAIR OF THE PRINTER MECHANISM Troubles related to the printer mechanism should be repaired according to the troubleshooting procedures in Table 5-7. Table 5-7. Repair of Printer Mechanism Symptom The pump motor does not rotate. Ink is not absorbed or poorly absorbed. rhe carriage motor Aoes not rotate. Condition The pump motor fails to rotate at time of power on. Used ink does not go through the used ink tube during the cleaning operation.
REV.-A Table 5-7. ReDair .– Symptom The carriage does not operate normalIy at time of power on. (after the carriage has been manually centered prior to power on). Condition The carrige motor rotates, but the carriage does not move. The carriage moves to the left slightly and then stops. Printing is not performed. of Printer ––Mechanism — —– –-–-- .— --- . —[Cont.} —..... Cause Checkpoint Solution The pulley is defective. Check for broken or worn pulley. Replace the driven pullely.
REV.-A Table 5-7. Re~air of Printer Mechanism (Cont.) Symptom Abnormal printing. Condition A particular dot is not printed. A dot is not printed occasionally. Printed characters are not aligned. Cause Checkpoint Front of the printhead is not clean. Perform the cleaning operation. Clean. The head cable is disconnected. Check the head cable for disconnection. Replace the cable. The printhead is defective. Replace the printhead. Replace the printhead. Front of the printhead is not clean.
Table 5-7. Repair of Printer Mechanism (Cont.) Symptom Paper is not fed normally. Condition Cause Checkpoint Solution Top edge holding mechanism does not function properly. The TE motor is defective. Measure the coil resistance of the TE motor. Replace the TE motor. Paper-feeding method cannot be changed. Release mechanism is defective. Check the release mechanism. Replace the defective parts. Paper is not fed. Foreign substance are lodged in the paper path. Visually check the paper path.
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REV.-A CHAPTER 6 MAINTENANCE 6.1 PREVENTIVE MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1 6.2 LUBRICATION AND ADHESIVE APPLICATION . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1 LIST OF FIGURES Figure 6-1. How to Apply Adhesive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..6-1 .. Figure 6-2. Lubrication Points (l).. . . . . . . . . . . . . . . . . .
REV.-A 6.1 PREVENTIVE MAINTENANCE Preventive maintenance includes regular cleaning of the case exterior (using denatured alcohol), as well as occasional vacuuming of the mechanism’s interior to remove dust and paper debris. After cleaning the unit, check that it is adequately lubricated (as described in Section 6.2, below). Before returning the printer to the customer, check that the printer operates normally.
REV.-A Table 6-2. Lubrication Points (Refer to Figure 6-2 to Figure 6-3) Ref. No. r I Lubrication Points Lubricant (1) Sliding surface of the LEVER, RELEASE, SUB. G-1 4 (2) The left shaft of the ROLLER ASSY., DRIVER and the inner side of the FRAME ASSY., LEFT. G-14 (3) HOLDER, PLATEN, RIGHT G-1 4 (4) HOLDER, PLATEN, LEFT G-1 4 (5) Carriage pad and CARRIAGE, SUB o-5 Table 6-3. Adhesive Application Points (Refer to Figure 6-2 to Figure 6-3.) Ref. No. Adhesive Application Point I No.
REV.-A Figure 6-2.
REV.-A (-, . “L..] Figure 6-3.
REV.-A APPENDIX A.1 A-1 C O N N E C T O R SUMMARY................................................................., A.2 CIRCUIT DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . A-7 A.3 CIRCUIT BOARD COMPONENT LAYOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1 4 A-1 8 A.4 EXPLODED DlAGRAM......................................................................., A.
REV.-A LIST OF TABLES Table A-1. CNBoard Connector Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2 Table A-2. CN2 {C076 Main).......... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3 Table A-3. CN3 (C076 Main).......... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3 Table A-4. .. CN4 (C076 MAIN) . . . . . . . . . . . . . . . . .
REV.-A A.1 CONNECTOR SUMMARY Figure A-1 illustrates the interconnection of the primary components. Table A-1 summarizes the functions and sizes of the connectors.
REV.-A Table A-1.
REV.-A Table A-3. CN3(C076 MAIN) (Cont.) Table A-2. CN2 (C076 M A I N ) No.
REV.-A Table A-1 1. CN11 (C076 MAIN) Table A-4. CN4(C076 MAIN) Signal Name No. +5 +5 GND GND GND GP GP GP +35 +35 NC 1 2 3 4 5 6 7 8 9 10 11 Function +5 VDC +5 VDC Signal ground Signal ground Signal ground Power ground Power ground Power ground +35 VDC +35 VDC Not connect No. 1/0 1 - 2 3 I - Signal Name LED PE GND Function I @ +5 VDC Paper-end sensor (R) Signal ground Table A-12. CN12 (C076 MAIN) I No. !/0 1 2 0 0 Signal Name PM+ PM- Function Pump motor + Pump motor - Table A-13.
REV.-A Table A-18. CN18 (C076 M A I N ) Table A-17. CN17 (C076 M A I N ) No.
53 co -— Re~tifier Figure A-4.
4 4 .4 IJ 1 I 4 + v 5 (s w - 0 v + b + b . 4 4 * !s” —— : Figure A-5.
1 1 L u I I I 7 =r-J’ 1 > .1 z 44 —- Filter u ~! R e c t i f i e r I u L Ill, Figure A-6.
1 1 1 , * N 1. a r, . . ,. c1 I I L k. + Figure A-7.
. —-----+11I L 1 — 1 II \ Figure A-8.
REV.-A A.3 CIRCUIT BOARD COMPONENT LAYOUT la .. -— ., ‘– .-J , —... .,”, m u ? : s la 1 u —J Ei . :. Kx Figure A-9. C076 MAIN Board Component Layout (Surface) A-1 4 ~c’. . .
REV.-A C301-J n CIW c1 clo3 Rl a R70 n . . C7 am E u d“ Figure A-10.
REV.-A II II +- – - L-J w (n CM +, I ‘1 .s2.- Nil 1==-r’:=’os’ II l’% L2 *: “ ‘ lu~ JSI * .P5ZI / c A ii Lu *n *– I I . m. .“. .?.. * .,. A.’iu bmn-wa I 8“; , , , , ● , , , , , Figure A-1 1. C076 PSB Board Component Layout A-1 6 10 I I m- 1 .
REV.-A II I I - - L R16 w CN I I I I CN3 21 r! II I ++ I Assy. 2004225 E “ 0 0 #CHK-S4Xl k-’&-,,E ich Figure A-1 2. C076 PSE Board Component Layout A-1 7 ,S.
REV.-A Table A-21. Part No. Reference Table Ref. No. Ref. No. Description 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 HOUSING ASSY., LOWER SHIELD PLATE HOUSING, UPPER HOUSING, FRONT COVER, FRONT COVER ASSY., PRINTER SHEET GUIDE ASSY.
REV.-A Table A-21. Part No. Reference Table (Cent) Description Ref. No. 572 573 574 575 576 577 581 582 585 586 587 588 589 590 591 592 593 594 595 596 597 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 Ref. No. HOLDER, P. GUIDE, SUPPORT, LEFT HOLDER, P. GUIDE, SUPPORT, RIGHT ROLLER ASSY.
REV.-A A.5 CASE OUTLINE DRAWING — — , II h r-= 1 I r H I I w I ! J 325 mm I Figure A-19. SQ-870 Case Outline Drawing A-26 T ,..
REV.-A & 1( 1, 1 I 1“ I -----1 I 1----1 II ! , (yK$ I ( ,- 1 1 1 1 “. .. J / ’ 325 mm Figure A-20.
EPSON SEIKO EPSON CORPORATION PRINTER DIVISION EPSON OVERSEAS MARKETING LOCATIONS EPSON AMERICA, INC. 20770 Madrona Avenue Torrance CA 90503, U . S . A . Phone: (2 13) 782-0770 Fax: (21 3) 782-5248 EPSON DEUTSCHLAND GmbH Zulpicher Stra13e 6, 4000 Dusseldorf 11 F.R. Germany Phone: (02 1 1) 56030 Fax: (21 1) 504-7787 EPSON UK LTD. Campus 100, Maylands Ave, Hemel Hempstead, Hertfordshire, HP2 7EZ, U.K. Phone: 0422-61144 Fax: 0422-227227 EPSON FRANCE S. A.
EPSON Printed in Japan 92.02 -.
