CF Series Scanner Maintenance Manual Firmware Rev. S27G and up Scanner Serial Number The information contained herein is the property of SCAN-GRAPHICS, Inc., and shall not be reproduced or copied, or used as the basis for the manufacture or sale of apparatus or service without the written approval of SCAN-GRAPHICS, Inc., first being obtained. Scan-Graphics, Inc. 700 Abbott Drive Broomall, Pennsylvania 19008-4373 Telephone: (610) 328-1040 FAX: (610) 543-6257 Email: support@scangraphics.
CF Series Scanner Maintenance Manual (Firmware Rev. S27G and up) © 1989-1996 Scan-Graphics, Inc. All rights reserved. Printed in the United States of America. No part of this document may be used or reproduced in any form or by any means, or stored in a database or retrieval system, without prior written permission of Scan-Graphics, Inc. The information contained herein is the property of Scan-Graphics, Inc.
Preface Purpose and Scope The purpose of this manual is to provide the information necessary to keep the CF Series Scanner in proper working order through regular preventive maintenance and provide the required information for a trained electronics technician to effect repairs. This manual takes problem isolation and solution to the subassembly or board level.
Section 6--Adjustment, Calibration, and Replacement Contained in this section are the various procedures for adjusting and calibrating the scanner components. It also covers replacement of some components. This treatment is task-oriented. The two appendices are: Appendix A--Terminal Setup This appendix discusses settings required on terminals used with the CF Series Scanner. Appendix B--Replacement Parts List This appendix lists parts that may need replacement and their ordering numbers.
Table of Contents Preface Table of Contents Warranty Revision Record 1 CF SERIES SCANNER: FEATURES AND SPECIFICATIONS 1.1 FEATURES 1.1.1 User Interface 1.1.2 Critical Calibration 1.1.3 Advanced Image Processing 1.1.4 Multiple Resolution 1.1.5 Preview Display Monitoring (option) 1.1.6 Diagnostics 1.1.7 Construction 1.2 SPECIFICATIONS 1.2.1 Functional Specifications 1.2.1.1 Scan Speed 1.2.1.2 Resolution 1.2.1.3 Accuracy/Repeatability 1.2.1.4 Imager Sensor 1.2.1.5 Transport 1.2.2 Input Characteristics 1.2.
2.3 CONNECTIONS 2.3.1 A.C. Power 2.3.2 Video (Optional) 2.3.3 Host/Local Control and Diagnostics Terminal 2.4 POWER-UP 2.4.1 Check Line Voltage 2.4.2 Check Power Supply Voltage (Recommended) 2.5 SYSTEM CHECK 2.5.1 Check Line Splice 2.5.2 Check Merge 2.6 DE-INSTALLATION 3 SYSTEM DESCRIPTION 3.1 MAJOR SYSTEMS OF SCANNER 3.1.1 Scanner Control System 3.1.2 Document Transport System 3.1.3 Document Illumination System 3.1.4 Camera System 3.1.5 Data Handling System 3.1.6 Display System (Optional) 3.1.
5 ON-BOARD DIAGNOSTIC SYSTEM 5.1 DIAGNOSTICS TESTS 5.1.1 (1) : Set Global Parameters 5.1.2 (2) : Perform System Initialization 5.1.3 (3) : Parameter Backup 5.1.4 (4) : Set Motor Speed 5.1.5 (5) : Splice Counts 5.1.6 (6) : Focus and Magnification 5.1.6.1 Focus 5.1.6.2 Magnification 5.1.7 (7) : IP LUT 5.1.8 (8) : Merge and Splice Adjustment 5.1.8.1 Line Splice Adjustment 5.1.8.1.1 Adjusting Line Splice Mechanically 5.1.8.1.2 Adjusting Line Splice Electronically 5.1.8.2 Merge Adjustment 5.1.
5.2 SAVING PARAMETER CHANGES TO NON-VOLATILE MEMORIES 5.2.1 Pixel Correction and Exposure Values 5.2.2 System Parameters 6 REPLACEMENT : COMPONENT AND SUB-ASSEMBLY 6.1 Task -- Removing Scanner Covers and Panels 6.2 Task -- Belt Replacement and Tension Adjustment 6.3 Task -- Lamp Installation and Replacement 6.4 Task -- Replacement of White Background 6.5 Task -- Camera Assembly Removal and Replacement 6.6 Task -- Camera Calibration 6.6.1 Video Board Adjustment 6.6.2 Camera Board Offset 6.6.
Scangraphics warrants its Scanner Products against defective workmanship and materials for a period of ONE (1) YEAR from date of shipment. Software and MK35 Products are warranted for a period of Ninety (90) days from date of shipment. Scangraphics must be advised in writing, during the warranty period, of any defect or non-conformity within thirty (30) days after discovery of defect.
Revision Record Rev. No. Date Action 0 1 12-10-95 05-24-96 Original draft. Added sections 1-4 and Appendices A & B 1 SYSTEM OVERVIEW The CF Series Scanner is a highly versatile data capture device, providing choices in speed and resolution and producing high quality data. It also allows a choice between using a fixed threshold or an adaptive threshold.
1 CF Series Scanner: Features and Specifications This chapter provides a brief overview of the features available and the specifications that apply to the various CF Series Scanner models. 1.1 Features The CF Series Scanners offer a wide range of features that permit the user to set up an ideal configuration for today's needs as well as providing the capability to adapt to new needs in the future.
Echo Scan, you can fine tune the scan parameters for the best possible image quality in all areas of the document. Diagnostics • • Self-diagnostic tests are performed at power-up and on rebooting, unless manually overridden. More powerful, menu-driven, internal diagnostic software is available for use by factorytrained technicians.
1.2 Specifications The scanner is designed to operate in a typical office environment, with options available for different user needs. Functional Specifications • Scan Speed Speed can range from 3.9 to 138.5 inches per minute, depending on the selected scan resolution. Refer to Table 1-A for a comparison of nominal speed to resolution. Interpolated resolutions are available through Scangraphics ScanServ ver 3.0.0 or above.
• • • Accuracy/ Repeatability .04% lateral Note: Measured over 40 inches for CF Series 44 scanners, and over 35 inches for CF400/36 scanner. .04% longitudinal Note: Measured over 20 inches for all CF Series scanners. Imager Sensor Multiple CCD arrays Transport Continuous feed Input Characteristics • • • • • Document Width 44 inches (111.8 centimeters) Active Scan Width 41 inches (104.1 centimeters) for models CF1000/44 and CF500/44 43 inches (109.2 centimeters) for model CF300/44 36 inches (91.
• • • Voltage 115 15% volts (a.c.) 220/240 15% volts (a.c.) (optional) Current 5.5 amps maximum (115 volts) 3.0 amps maximum (220/240 volts) Frequency 50/60 Hz ±5% Environmental Specifications • • • • • Operating Ambient Temperature 18 to 30C (64 to 86F) Non-Operating Temperature 5 to 40C (41 to 104F) Humidity The scanner can operate at any humidity level, short of condensation.
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2 INSTALLATION 2.1 Unpacking The CF Series Scanner comes in a corrugated paper crate mounted to a wooden pallet with four "air-ball" cushions on the bottom. On the inside are packing materials which prevent the unit from shifting around. Immediately upon receipt, check for shipping damage and report any found to the shipper and SCAN-GRAPHICS.
2.2 Setup 2.2.1 Document Catch Installation The document catch has three keyhole type slots. Insert the studs on the rear of the scanner (about an inch above the fan) into the three keyhole slots and push down firmly to seat them in the slots. 2.2.2 Environmental Concerns The following conditions must be met to ensure acceptable working conditions for the scanner: 2.2.2.1 Site The site has to be relatively dust free. The environment should also generate a low degree of static electricity. 2.2.2.
See Figure xx for an illustration of the connector panel on the back of the scanner showing the various points of connection for the following items. The appearance of the back panel may vary, depending on the type of interface ordered. 2.3.1 A.C. Power Check the line voltage to ensure that it is the proper level for the unit (either 110 or 220, as ordered). Then connect the enclosed A.C. power cord to the scanner and to the wall outlet.
2.5.1 Check Line Splice See Section 5.1.8.1 for details. A specific test document must be used for doing this check. 2.5.2 Check Merge See Section 5.1.8.2 for details. A specific test document must also be used for doing this check. 2.6 DE-INSTALLATION To de-install the CF Series Scanner, remove the cables from the rear of the scanner and lift the document catch up and away from the scanner.
3 SYSTEM DESCRIPTION The CF Series Scanner is a highly versatile data capture device, providing choices in speed and resolution and producing high quality data. It also allows a choice between using a fixed threshold or an adaptive threshold. An adaptive threshold takes into account variations in the shading of the media to yield consistently good results, even from less than optimal documents.
3.1 MAJOR SYSTEMS OF SCANNER To provide a general overview of how the CF Series Scanner works, the remainder of this section will discuss the various systems that comprise the scanner. 3.1.1 Scanner Control System The CF Series Scanner may be controlled by the host computer, by the optional keypad on the scanner itself, or a combination of the two. Another option is the use of a separate "local terminal." Used primarily for diagnostic purposes, this ANSI-type terminal takes the place of the host computer.
6. Two pulley-driven drive rollers, one on each side of the scan window, are located on the bed of the scanner. Applying pressure against these two drive rollers are two free-turning rollers mounted in the lid of the scanner. 7. Three light sensitive sensors determine the position of the document. 3.1.3 Document Illumination System The Document Illumination System employs one green florescent imaging lamp along with a ballast. The Video Board controls these.
In detecting data, the system simply distinguishes between black and white or dark and light. The number of data samples taken per inch determines the resolution of the scan. The data handling system also includes several data formats as an option. For example, RLE (Run-Length Encoded), Group 4, and Greensheet. The standard output format of scanned data is 8-bit gray scale or thresholded binary bit stream. 1.
3. The scanner has a switching power supply which provides an output of +5 V.D.C. for both the front-end video camera system and the Multibus card cage. 4. The scanner has three linear power supplies which provide outputs of +12 V and -12 V for both the front-end video camera system and the Multibus card cage; +46 V for the stepper motor driver; and +120 V for the illumination system. 3.1.9 Ventilation System The logic boards, 100 Watt lamps, and power supplies produce significant amounts of heat. 1.
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4 PREVENTATIVE MAINTENANCE 4.1 DAILY As a start-up check each day, inspect the scan window daily (or more often if conditions warrant it). If dirty, clean it using a clean soft lint-free cloth and glass cleaner. When cleaning the scan window, great care should be taken to not use so much glass cleaner that it could seep down the edge of the scan window glass.
4.3.2 Check Power Supply Voltages Open the front of the scanner cabinet, refer to the Figure of the Power Supply Assembly found in this manual and Section 6.7, and check the voltages at the test points on the power supply. 4.3.3 Replace Lamps To assure adequate and consistent illumination of the document, replacement of the lamp annually is recommended. Depending on the amount of usage, however, replacement may not be necessary that often.
5 DIAGNOSTIC SOFTWARE 5.1 On-Board Diagnostic System The Main Menu shown in Figure 5-7 is typical for a CF Series 1000 scanner. The Main Menus for the other CF Series Scanners are similar. The functions on the Main Menu are the same as those on the keypad and the scanner can be operated from either device.
Menus pop up in response to most choices on the Diagnostic Tests menu. Simply enter the desired value or parameter and the function will be performed or its menu will be accessed.
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5.1.1 Set Global Parameters (1) The Global Paramerters affect all scanner operations and will affect your entries in other menus. When you press <1> for “Set Global Parameters,” a menu display similar to that in Figure 5-9 appears. The values shown in this example are typical for a CF Series 1000 scanner.
turned off since the splice has been adjusted to the sub-pixel level at the factory. Note that the host scan software can override this scanner setting. <3> PIXEL SOURCE: The two choices are the cameras and a bar generator. The bar generator is located on the CALS Board and produces a set test pattern for diagnostic purposes. The host scan software can change this setting.
5.1.2 Perform System Initialization (2) When you press <2> to select this option, all parameters and register values are reset to those stored in the NVRAM Boot Parameter File on the CALS Board. The Main Menu then returns. 5.1.3 Parameter Backup (3) This option, <3>, provides a safe storage location in NVRAM on the CALS Board for the factory-set or permanent parameter file values. It is accessible only through the local control terminal.
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5.1.4 Set Motor Speed (4) Press option <4> to set the motor speeds to be used for each resolution. The Resolution Index is a common index which combines a set of parameters -- resolution (samples taken per inch), motor speed, and the splice count. Lower resolutions run at a faster speed than high resolutions. The motor speed is inversely proportional to the value in the speed table. When you select this option, the menu illustrated in Figure 5-11 will appear.
The number of resolutions entered in the Global Parameters will determine the functionality of this table. For example, the CF 300 with three resolutions will use motor speed values entered in A through C when different resolutions are selected from the Main Menu. If you press to tune the speed for Resolution Index A, you will receive the prompt, "Actual [*]," where "*" is the value entered the last time this option was used. Enter the actual measured size of a target you have scanned.
5.1.5 Splice Counts (5) The Splice Counts option provides a method to list and modify line splice settings. The counts are usually set interactively through choice 8, "Merge & Splice Adjustment," on the Diagnostic Tests menu ( see 5.1.8 ) . When you press <5>, a display similar to Figure 5-12 will appear. This particular figure is from a CF 1000/44. The number of entries under Resolution Index depends on the value entered in Global Parameters.
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5.1.6 Focus and Magnification (6) When you press <6> to select the "Focus and Magnification" option, the sub-menu shown in Figure 5-14 will appear. From here, you may press to select "Focus", to select "Magnification," or F : Focus M : Magnification X : Exit Choice : X Figure 5-14 Focus and Magnification Menu you may press to exit this submenu and return to the Diagnostic Tests menu. NOTE: Focus, magnification, merge, and splice functions are intertwined.
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5.1.6.1 Focus When adjusting the focus, the local control terminal acts as a digital oscilloscope, graphically representing the voltage level output by the CCD. When you press for Focus, a display similar to that in Figure 5-15 will appear.
Press
to specify the pixel from which you wish to begin your display, and then enter a four-digit decimal value where the cursor appears. The ampersand (&) at the top of the screen will represent this pixel. Press to choose between the three data sampling methods. The choices are "Single," which will take a sample when the space bar is pressed; "Auto," which will sample continuously; and "Lock," which will lock on to a drifting object and keep it on the screen.
1. Open the scanner top cover and remove the rollers and document plate. 2. Place the Standard Target Document upside down on top of the scan window. The center line of the target (barbell shape) should be directly above the center of the camera being tested. 3. Place the white background strip on top of the Standard Target Document. 4. Place the weight on top of the white background strip. 5. Enter the focus software by pressing . 6. Use the command to select the appropriate camera. 7.
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5.1.6.2 Magnification The magnification (maximum physical resolution) is set by the distance of the camera from the window. The closer the camera is to the window, the high the resolution. The farther the camera is from the window, the lower the resolution. Adjusting the magnification is a tedious and lengthy process; however, it is only necessary when you replace a camera board. The camera board is a simple and very reliable circuit that will rarely need replacement.
Procedure for Adjusting Camera Magnification: The first four steps of this procedure -- as well as the required equipment, tools, and materials - are the same as for adjusting the focus of the camera. NOTE: In practice, both the focus and magnification of a given camera should be set before moving on to the next camera because of the need for precise placement of the Standard Test Document.
NOTE: On CF 300/44 models, the multiple should be 60, rather than fifty. If you have this model, please use the following table to find the values. Magnification Values for CF300 3540 3600 3660 3720 3780 3840 3900 3960 4020 4080 4140 4200 4260 4320 4380 4440 4500 4560 4620 4680 4740 4800 4860 4920 4980 5040 5100 5160 5220 5280 For example, the magnification is correct if the distance reported is 5150, 5200, or 5250.
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5.1.7 IP LUT For the Image Processor Board (7) When you select option <7>, a display similar to Figure 5-16 will appear. This display is the Look-Up Table (LUT) for the image processor board. The values in the LUT table are used to scale incoming pixels before they undergo image processing operations. The first entry is in Address 00 (top left corner) and the last entry is in Address FF (bottom right corner). The incoming pixel value serves as the address to the LUT.
LUT customization is useful for scanning low contrast documents. It allows the small dynamic range of a low contrast document to be expanded to full size.
5.1.8 MERGE AND SPLICE ADJUSTMENT (8) This feature lets you precisely adjust the effective camera position to eliminate discontinuities across camera boundaries. Merging is adjustment along the scan line. Splicing is adjustment perpendicular to the scan line. ______________________________________________________________________ NOTE: Focus, magnification, merge, and splice functions are intertwined. If you adjust one, you must test and, if necessary, adjust the other functions.
At this point, the menu illustrated in figure 5-17 appears, although certain items on it may not appear, depending whether or not you choose splice adjustment. The top half of this menu screen displays a “boundary Indicator and provides a view of the scanner current status. The bottom half displays the currently available keyboard commands for adjusting the merge and splice. If you did choose splice adjustment, all of the items that follow will appear in the top half of the Merge and Splice Adjustment Menu.
• • F (fast) Allows you to speed up document travel to get to a specific place on the document. It toggles between “fast” and the scanning speed previously set. X (exit) Press to exit the Merge and Splice Adjustment menu and return to the Diagnostic Test Menu.
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5.1.8.1 Line Splice Adjustment Line splicing is matching or aligning the cameras so they all will encounter a line parallel to the row of the cameras at the same times. If the cameras do not encounter the data at the same times, the line will appear broken. If one camera encounters data before adjacent cameras do, that means it is tilted too far towards the front of the scanner. If it encounters data after its neighboring cameras, it is tilted too far back.
5.1.8.1.2 Adjusting Line Splice Electronically Procedure for Electronic Line Splice Adjustment: 1. Access the Diagnostic Tests Software and select “ Splice and Merge Adjustment.” Answer “yes” to the prompt, “ Use Electronic Splice.” 2. Scan a test document and adjust each boundary. 3. Save the changes to non-volatile RAM (NVRAM). Refer to Section 5.2 for details about the procedure for issuing the SAVE command. 5.1.8.
5.1.9 AUTOSIZE PARAMETERS (9) When you press <9> to select auto size parameters, a menu similar to that shown in figure 5-24 will appear. This menu allows you to tune and test the scanner’s automatic sizing function.
5.1.10 SET CCB REGISTERS (A) “Set CCB registers” allows you to view and alter the contents of the registers on the CCB (Camera Controller Board). These registers store the parameters controlling the function of the camera. When you press for “Set CCB Registers”, the prompt, “Do you want to initialize CCB Board? Type “Y” (yes), or “N” (No)-->,”appears. If you press , the registers will be cleared of their current and reset to the values stored on the Non-volatile RAM (NVRAM) on the CALS Board.
5.1.12 TEST I/O BOARD (C) If you select for “Test I/O Board”, the menu shown in figure 5-26 will be displayed. The light and motor functions are controlled by the Video Board. The document sensors are controlled by the CPU/IO board.
If you enter <7>, messages will come up showing which sensors are on (detecting something in their path). The sensors are identified as: A (before first roller) ; B (between first roller and scan window) ; and C (right after scan window). When this test is selected, a message similar to the one shown in figure 5-27 will appear.
5.1.13 PAGE OFFSETS (D) Page Offset is a delay count used to accurately position the document at the scan window after loading ( using Auto scan mode ). The count varies with scanning resolution and scanning speed. When Page Offset is adjusted accurately, there will be no significant underscan or overscan and the margin appearing on the scanned image of the document will be the same size as on the actual document. The Page Offsets can be set either manually or automatically.
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5.1.14 CAMERA SYSTEM DIAGNOSTICS (E) When you press this option, a display similar to the one shown in figure 5-29 appears. The “n” shows the number of cameras set in Global parameters. USING n CAMERAS CAMERA SIZE (PIXELS) [1510] : Figure 5-29 Camera System Statistics Enter the camera size or just press and the menu in figure 5-30 appears.
fill a specific section of memory, enter the starting and ending addresses, followed by the data value you wish to fill them, separated by a comma. You do not need to enter a . For example, “F1000, 2000,3”. If you enter , the flash memory containing the exposure values is erased. All Exposure Memory locations are set to FF. Choice runs a memory test. If no errors are found , the test indicates “OK” .
5.1.14.2 NE : Normalize Exposure Before choosing Normalize Exposure, make sure the following steps are completed: 1. Clean both sides of the scan window. 2. Load clean, white calibration document over entire scan window. 3. Scanner and lamps must be power on for at least 10 minutes. If you enter “NE” for “Normalize Exposure”, the prompt “BASE EXPOSURE TIME [3F00];” will appear. Reply with . Next, the prompt “TARGET PIXEL VALUE [C0]:” will appear. Again, reply with .
5.1.14.3 G : Gain Memory Gain control allows light response equalization for each CCD photosite in the scanner. This is required because the amount of light transmitted through the lens is greatest in the center and tapers off towards the edges. Also, the response of individual photosites varies somewhat due to limitations in the manufacturing process. Each byte in the Gain Memory holds a corrective value for a corresponding photosite.
5.1.14.5 D : Display Calibration Memory If you enter and a for “Display”, the contents of the Calibration Memory will be displayed, starting from address 0000. This memory contains 64k 8-bit words. They are displayed 320 at a time. To view the next 320, press and again. To view the memory starting at an address other than 0000, press followed immediately by the address. You do not need a . For example, “D20000”.
5.1.14.8 Q : Take Qualified Line This function also puts a sample line into the calibration memory.In this case the dummy pixels are discarded and only image pixels are retained. There are 5312 ( 14C0 hex ) qualified pixels per camera. The qualified sample shows exactly what is being transferred downstream to the Image Processor Board. 5.1.14.9 A : Autotake The autotake function allows you to see a continuous dump of the data a camera is recording.
be for no pixels to be reported. Each bad pixel found is reported in the display in the following format: AAAA,DD Where AAAA is its location in calibration memory, and DD is its value. If you press in response to the “CAMERA:” prompt, you will return to the Uniformity check menu. If you press while that menu is displayed, you will exit the Uniformity check function and return to the Camera System Diagnostics menu. 5.1.14.
5.1.14.15 M : Mirror Control The scanner contains circuitry which allows a scanned document to be flipped over electronically to produce a mirror image. This command allows you to enable or disable the mirror. When you press , a message will appear indicating the current state of the mirror : “ MIRROR IS CURRENTLY OFF “ or “ MIRROR IS CURRENTLY ON “ Next , the following appears : “ 0 : MIRROR OFF 1 : MIRROR ON CHOICE : “ Press 0 or 1 to set the mirror state ( no is required ).
5.1.14.17 Y : Camera Delay (Factory Use ONLY) Writes a specified value to the Camera Delay Register on the video motherboard. This command is reserved for factory use. 5.1.14.18 C : Calibration Memory Test Does a write, read, and compare on the calibration memory using four test patterns. If no errors are detected, “OK” is reported for each pattern. If errors occur, the addresses of the bad memory locations are reported. 5.1.14.
Zoom In Zoom factor increases by a factor of 2 each time this key is pressed. Maximum zoom factor is 64. Zoom Out Zoom factor decreases by a factor of 2 each time this key is pressed. No effect if zoom factor is 1. left & right arrow keys Selector Movement These keys move the selector left and right. The selector wraps around at both ends of the display. Other keys exit to the Camera System Diagnostics menu. 5.1.14.21 X : Exit Press for “Exit” to return to the Diagnostic Tests menu.
5.1.15 (F) RESOLUTION CONTROL The option is used to set scanning resolutions and their corresponding display strings. Resolutions are selected by a letter index A-H. The number of resolutions that appears is governed by the number set in the Global Parameters. When you press to select “Resolution Control”, the display on the screen will be similar to figure 5-31.
The prompt, “Pixels/Inch:”, will appear. Enter the number of pixels resolved per inch in decimal followed by a . At this point, the prompt “Display String:” will appear. Enter a four-character reference that is significant to your operators, such as “LASR” for laser printer output or “FULL” for full resolution or “500” for the actual resolution. Pad with spaces if the reference contains less than four displayable characters.
5.1.16 (G) DOCUMENT SIZES This option allows you to set the active scan area for each document size (A-H). When you choose this option, the display will be similar to figure 5-32. The actual width values depend on the particular model. The one illustrated for A through E, for example, is for a CF 500/44 scanner. The number of sizes that appears depends on the number of sizes set in Global Parameters.
5.1.17 (H) RUN SELF TESTS When you press to select self tests, the scanner will perform up to nine self tests. ( The scanner does not use tests 7, 8 and 9 if the display system is not installed.) Self Test 1 CPU RAM: This test the random access memories on the CPU Board. Self Test 2 Cals Board: This tests the random access memories on the CALS Board. Self Test 3 CCB Line Generation: This tests the End-of-Line interrupt signal generation of the CCB Board.
5.1.18 (I) RESTORE NVRAM This command returns system boot-up parameters stored in non-volatile memory to their factory default settings. This command is used in the manufacturing process when creating a new scanner. It should be used in the field only when the NVRAM contents have been destroyed by a hardware failure. NOTE: This command does not restore tuned parameters particular to a specific scanner. When you press , the prompt “ Are You Sure [Y/N] ? “ will appear.
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5.1.19 (J) BINARY FILTER PARAMETERS The binary filter is used to improve image quality by either removing noise pixels ( speckle removal ) or filling small gaps. Removing means that a pixel which had been classified as foreground ( mark ) is changed to background ( media ). Filling means that a pixel which had been classified as background ( media ) is changed to foreground ( mark ). The decision to remove or fill in a pixel is made based the classifications of pixels in its neighborhood.
Commands :
Choose Parameter Set The prompt “ Parameter Set ( A,B,C,D ) : “ will appear. When you enter a letter, the corresponding set will be displayed. Set Parameter Sets one of the parameters within the currently selected set. Enter the appropriate parameter number and value when prompted. Use the neighborhood coding scheme above for the neighborhood values. Exit Returns to the Diagnostics Tests Menu.
5.1.20 (K) IP AVERAGER LUT The image processor board contains a set of lookup tables used for thresholding of image data. There are 256 tables (numbered 00-FF hex) containing 256 bytes each. Only one table is used at a time. The table used is determined by the Threshold, Filter and Tracking settings selected by the operator. The input to the table is the local area average (40 x 40 pixels) of the neighborhood of the pixel under consideration. The output from the table is a threshold value.
5.1.21 (L) AUTOCALIBRATION This function performs exposure and gain normalization automatically. Diagnostic information is displayed at each step of the process. Otherwise, it is the same as the Autocalibration available at the scanner keypad. The following prompt will appear : “Proceed With Calibration ? [Y/N] : “ Reply with ‘N’ to escape to the Diagnostics Test Menu. Reply with ‘Y’ to do the calibration. Next “Feed in Calibration Standard” will appear.
5.1.22 (M) SCSI BUFFER PARAMETERS When you press , a menu displays the current settings of the data buffer on the SCSI interface board as shown in figure 5-33 below. ----- SCSI BUFFER PARAMETERS ----UPPER THRESHOLD LOWER THRESHOLD NUMBER OF CAMERAS ADDED LINE UPDATE RATE : : : : 08 04 01 01 CURRENT SPEED : FULL HIT ANY KEY TO EXIT Figure 5-33 SCSI Buffer Parameters Menu. The values displayed have the following function and ranges.
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5.2 SAVING PARAMETER CHANGES TO NON-VOLATILE MEMORIES All the programmable system parameters and calibration values are stored in non-volatile memories. They are stored on two different modules. The pixel gain correction values and camera exposure values are stored on the Video Motherboard and are accessed directly when scanning is active. All other parameters are stored on the Calibration and Line Splice ( CALS ) Board. 5.2.
2. Locate the CALS Board which is in the left-most slot of the card cage. 3. Locate the memory write protect switch, SW1, on the CALS Board. 4. Turn the toggle switch down (memory write enable position). The toggle switch is factory set to the down position. 5. Issue the SAVE command by either method described above. 6. If desired, turn the toggle switch up (memory write protect position) 7. Close the door and cover.
6 REPLACEMENT: COMPONENT AND SUB-ASSEMBLY 6.1 TASK -- REMOVING SCANNER COVERS AND PANELS Equipment, Tools & Materials Required: • 5/32 inch Allen wrench • Standard Flat-head Screwdriver Procedure to Remove the Front Cover: 1. Use a 5/32” Allen wrench to open the two latches on front cover, then tilt the cover out - top first. 2. Disconnecting the earth-ground wire connecting the front cover and the frame. 3.
6.2 TASK - - BELT REPLACEMENT AND TENSION ADJUSTMENT Equipment, Tools & Materials Required: • • 5/32 inch Allen wrench Standard Flat-head Screwdriver Procedure for Replacing Belt and Adjusting Tension: 1. 2. 3. 4. Disconnect the power completely, remove the AC power cord. Lift up the lid of the scanner. Remove the left side panel ( Refer to 6.1 if necessary ). Loosen the three screws holding the pulley assembly. Adjust the tension by sliding the pulley assembly down and towards the back of the scanner.
6.3 TASK - - LAMP INSTALLATION AND REPLACEMENT Equipment, Tools & Materials Required: • Long 7/64 inch hex driver • 5/32 inch Allen wrench • Standard Flat-head Screwdriver Procedure for Installing and Replacing Imaging Lamp : 1. Disconnect the power completely; remove the AC power cord. 2. Remove the front cover, both side panels, and the back cover from the scanner.
6.4 TASK -- REPLACEMENT OF WHITE BACKGROUND A piece of white mylar is mounted on the underside of the scanner lid to provide a uniformly bright and clean background for all documents. In time, however, this background may be damaged and will need to be replaced . It is a simple job, but for best results, it requires the efforts of two people. The goal to keep in mind while performing this task is that you want to provide a clean smooth background which presents no edges.
6.5 TASK - - CAMERA ASSEMBLY REMOVAL and REPLACEMENT Four slot-head screws secure the camera board to the camera shelf. Connection to the rest of the system are made from the camera board. The camera board is connected by a ribbon cable and by one coax cable to the Video Board. Equipment, Tools & Materials Required: • Standard Slot-head Screwdriver Procedure for Removing and Replacing Camera Assembly: 1. Disconnect the cables. 2.
6.6 TASK -- CAMERA CALIBRATION The following conditions require calibration of the scanner’s cameras: Replacement of any of the following components: CCD Camera Board Video Board Imaging Lamp Detection of image degradation Adjustment of +5 V, or +12 V Linear power supply voltages. All of the software tools for camera calibration are contained in the Camera System Diagnostics. Refer to the Diagnostics Tests software section 5.1.14 for details.
6.6.2 Camera Board Offset Offset is the adjustment for total darkness as perceived by the cameras. Equipment, Tools & Materials Required: • Small flat head screwdriver or potentiometer tweaker Camera Board Offset Adjustment Procedure: ( Repeat for Each Camera ) 1. Activate “AUTOTAKE” and enter the number of the camera to be adjusted. See section 5.1.14.9 for details. 2. You should either see all zeroes or some numbers on the screen. 3.
6.6.4 Gain Calibration Gain is the adjustment for total light or whiteness, as perceived by the cameras, compensating for variations within a camera. With the unit closed and imaging lights on (for at least 10 minutes), the signal level coming from the camera is considered as indicating uniform total brightness or white. 1. Enter clean, uniformly white, paper in the scanner, covering the entire scan window, if you have not yet done so. 2.
6.7 TASK - - CHECKING AND ADJUSTING VOLTAGES Refer to the following tables for location and adjustment points of the various power supplies in the system.
Check voltages at J2 on the Motor Driver board. From J2-1 To J2-6 Reading +44 to +45 VDC Adjust_____ R17 on PS3 +120 Volts: Remember to turn the lamp on when you do the measurement. Check voltage at J2 on the lamp power supply PS4.
6.8 TASK - - FAN REPLACEMENT Full functioning of all fans is essential to the operation of the scanner because overheating can damage the unit. Three fan AC fans are mounted in the CF series scanners to dissipate the heat produced by the lamps and the electronic hardware. One of these fans is mounted on the back cover of the scanner; one is mounted underneath the Multibus card cage; and one is mounted above the power supply.
6.9 TASK - - FILTER CLEANING AND REPLACEMENT The scanner has one reusable metal mesh air filter located on the left side of the scanner frame, near the slotted air-intake vents on the back of the left panel. This filter must be cleaned periodically to insure adequate air flow to the scanner (air cooled) ventilation system. If damaged sufficiently to allow debris to enter the scanner, it should be replaced. In either case, the filter is removed using the following procedure. 1.
*! # ") !" ! # %" )-,, "& " " ( ! $ " " ! "# " $! .(- + # " + !! & " $ " " ( " ' + + #!# & # " + ( + # I. "Terminal" Setup A. Open the "Terminal" program B. Under "Settings" 1. “Terminal Emulation" - Select DEC VT-100 (ANSI) 2. “Terminal Preferences" i.
III. Host Serial Connection A. Pin connections for the 9 pin D-subminature female connector on the rear connection panel of the CF scanner. 1. The scanner Transmits data from pin #2. 2. The scanner Receives data on pin #3. 3. The signal ground is pin #5 B. Cable requirements for using PC type serial ports with the CF scanner. 1. If the PC has a 9 pin D-subminature male connector use the following connections. a. Scanner pin #2 to PC pin #2. b. Scanner pin #3 to PC pin #3. c. Scanner pin #5 to PC pin #5. 2.
APPENDIX B: REPLACEMENT PARTS LIST Standard Scangraphics format Parts List follows.
