EPSON IMAGE SCANNER GT-5000 Action Scanner II SERVICE MANUAL EPSON 4005296
- ii -
NOTICE All rights reserved. Reproduction of any part of this manual in any form whatsoever without SEIKO EPSON’s express written permission is forbidden. The contents of this manual are subjects 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.
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 DANGER Headings. WARNING Signals a precaution which, if ignored, could result in damage to equipment.
PREFACE This manual describes functions, theory of electrical and mechanical operations, maintenance, and repair of GT-5000 / Action Scanner II. The instructions and procedures included herein are intended for the experience repair technician, and attention should be given to the precautions on the preceding page. The chapters are organized as follows: CHAPTER 1. GENERAL DESCRIPTION Provides a general product overview, lists specifications, and illustrates the main components of the printer. CHAPTER 2.
REVISION SHEET Revision Issue Date Revision Page Rev.
TABLE OF CONTENTS CHAPTER 1. CHAPTER 2. CHAPTER 3. CHAPTER 4. CHAPTER 5. CHAPTER 6.
Chapter 1 Product Description Table of Contents 1.1 FEATURES 1-1 1.2 SPECIFICATIONS 1.2.1 Basic Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2.2 Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2.3 Resistance to Electric Noise. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2.4 Environmental Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.9 MAIN COMPONENTS 1.9.1 B034 MAIN/ B034 MAIN-B Control Board. . . . . . . . . . . . . . . . . . . . . . . . 1.9.2 B034 PSB/PSE Power Supply Board . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.9.3 Carriage Assembly (Scanner Head) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.9.4 Lower Case with Scanner Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . 1.9.5 Upper Case . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GT-5000 / Action Scanner II Service Manual Product Description 1.1 FEATURES The GT-5000 and ActionScanner II are low-cost, high-resolution (300 dpi) color image scanners for A4 or letter-size sheets. These scanners have two types of interface: one is the bidirectional parallel interface model, the other is the SCSI model.
Product Description GT-5000 / Action Scanner II Service Manual Table 1-1.
GT-5000 / Action Scanner II Service Manual Product Description 1.2 SPECIFICATIONS This section provides specifications for the GT-5000 and ActionScanner II. 1.2.1 Basic Specifications Product type: Flatbed color image scanner Sub-scanning method:Reading head movement Photoelectric device: CCD (charge coupled device) line sensor Size of original: A4 or letter size — 216 × 297 mm (8.5 × 11.
Product Description GT-5000 / Action Scanner II Service Manual 1.2.3 Resistance to Electric Noise Static electricity: Panel - 10 KV Metal - 7 KV 1.2.4 Environmental Conditions Temperature Operating: Storage: 5 to 35° C (41 to 95° F) –20 to 60° C (–13 to 140° F) Humidity Operating: Storage: 10 to 80 %, no condensation 20 to 85 %, no condensation 1.2.5 Reliability Main unit: MCBF 100,000 cycles 1.2.6 Operating Conditions Dust: Ordinary office or home conditions.
GT-5000 / Action Scanner II Service Manual Product Description 1.3 INTERFACE SPECIFICATIONS This scanner has two models, one is Bi-directional interface models, one is SCSI models. 1.3.
Product Description GT-5000 / Action Scanner II Service Manual Table 1-2. Pin Assignments for the Bidirectional Parallel Interface Pin No. Signal Name I/O Description 1 STROBE I The STROBE pulse used to read in or send out data. Pulse width at the receiving terminal must exceed 0.5 µs. 2-9 DATA0-7 I/O These signals convey the 1st to 8th bits of data. A HIGH level indicates a logical 1; a LOW level indicates a logical 0. 10 ACKNLG O A pulse of approx. 12 µs.
GT-5000 / Action Scanner II Service Manual Product Description 1.3.2 SCSI This section describes the SCSI interface. 1.3.2.1 Basic Specifications Any items not included in this service manual are in conformance with ANSI standard X3.131-1986. Interface type: ANSI X3.131-1986 Functions: The following functions are included 1. Bus-free phase 2. Arbitration phase 3. Selection/reselection phase 4. Command phase Note: The LUN (Logical Unit Number) is fixed to 0 in this device.
Product Description GT-5000 / Action Scanner II Service Manual 1.3.2.2 SCSI Commands This device uses the following group “0" processor commands: Table 1-3. Commands for SCSI Interface Command Code Description Test Unit Ready 00H Confirm for operation Request Sense 03H Requires sense data (See Note 1) Receive 08H Data transmission from target to initiator Send 0AH Data transmission from initiator to target Inquiry 12H Requires information of SCSI device (See Note 2) Notes: 1.
GT-5000 / Action Scanner II Service Manual Product Description 1.3.2.4 SCSI Messages Table 1-5. Messages for SCSI Interface Message Code Direction Completion of ATN Command Complete 00H In — Disconnect 04H In — Bus Device Reset 06H Out Yes Message Reject 07H In/Out Yes 80H-FFH In/Out No Identify 1.3.2.5 SCSI Pin Assignments Table 1-6. Pin Assignments for the SCSI Pin No. 25 pin 7, 9, 14, 16, 18, 1-12, 14-25, 24 35-37, 39, 40, 42 Rev.
Product Description GT-5000 / Action Scanner II Service Manual 1.4 BUTTONS AND INDICATORS This scanner has two push buttons and three LED indicators for easy operation. Buttons OPERATE Turns the scanner on and off. When power is turned on, the scanner is reset. RESET Initializes the scanner. Every value is reset to the default value. Indicators OPERATE (green LED) Comes on when power is turned on. READY (green LED) Comes on when the scanner is ready to receive data.
GT-5000 / Action Scanner II Service Manual Product Description 1.6 ERRORS When an error occurs, the scanner displays the corresponding error message using the LEDs. Command Errors Cause: An unidentified command is detected. Scanner Response: The scanner ignores the command or parameter. (The current settings or the default values remain in effect.) The scanner sends a NACK and waits for the next command or parameter.
Product Description GT-5000 / Action Scanner II Service Manual 1.7 DATA TRANSMISSION PROTOCOL This section describes the data transmission protocol used by the scanner and host computer. 1.7.1 Handshaking Control Codes This section describes the control codes for the handshaking procedure. Control Codes without Parameters Step 1 The host computer sends a control code. Step 2 The scanner responds: ACK (06H): Legal control code received. (The scanner accepts the control code.
GT-5000 / Action Scanner II Service Manual Product Description 1.7.2 Data Block Handshaking Procedure Scanner Data Request Step 1 The host computer sends a control code. Step 2 The scanner sends a data block. Sc anner 1 2 H os t Figure 1-7. Scanner Data Request Monochrome Reading in Block Data Transfer Mode The following handshaking procedure is required to send the control code that requests the scanner send back data. Step 1 The host computer sends a control code.
Product Description GT-5000 / Action Scanner II Service Manual Color Line Sequence Mode Reading (Line Transfer) Step 1 The host computer sends a control code. Step 2 The scanner sends a data block (green). Step 3 The scanner sends another data block (red). Step 4 The scanner sends a third data block (blue). Step 5 The host computer responds: ACK (06H): Continue, send more data. CAN (18H): Abort. Step 6 The scanner sends a final data block.
GT-5000 / Action Scanner II Service Manual Product Description Byte Sequence Mode Reading Step 1 The host computer sends a control code. Step 2 The scanner sends 1 data line. Step 3 The host computer responds: ACK (06H): Continue, send more data. CAN (18H): Abort. Step 3 The scanner sends the final data line. SCANNER 1 2 3 2 3 4 HOST Figure 1-12. Color Byte Sequence Mode Rev.
Product Description GT-5000 / Action Scanner II Service Manual 1.7.3 Data Block Formats This section describes two data block formats. Line data format Consists of a 4-byte information block, or a 1-line image data block. Information Block Header Status STX ST 1 byte 1 byte Byte Counter DATA BC DATA 2 bytes Figure 1-13. Line Data Format Block data format Consists of a 6-byte information block and n lines of image data.
GT-5000 / Action Scanner II Service Manual Product Description 1.7.3.2 Block Data Format Information Block Header STX code (02H) The header indicates the beginning of a data block. Status Refer to Section 1.6.4. Byte counter/line The byte counter/line indicates the number of bytes of image data per line in the main scanning direction. Line counter The line counter indicates the number of lines of image data per color. Notes: 1.
Product Description GT-5000 / Action Scanner II Service Manual The Meaning of Each Status Bit Bit 7: Fatal error flag. Set when a system error occurs. Bit 6: Reserved. Bit 5: Area end flag. For color reading, set to 1 for the last data block of a color page. For monochrome reading, set to 1 for the last data block of the page. Bit 4: Option flag. When optional equipment is installed, set this to 1. Bit 3: Color attribute 1. See Table 1-7. Bit 2: Color attribute 2. See Table 1-7.
GT-5000 / Action Scanner II Service Manual Product Description 1.8 SCANNER FUNCTIONS Table 1-8 summarizes the scanner’s functions and settings. These functions, which are explained on the following pages, are all controlled by software commands. Table 1-8. Scanner Functions Function Command Available Settings Data format ESC D 1 to 8 bits per pixel for each color. Output resolution ESC R 50 to 1200 dpi, in 1 dpi steps (main scan and sub scan resolutions can be set independently).
Product Description GT-5000 / Action Scanner II Service Manual 1.8.2 Output Resolution The output resolution determines how many pixels, or dots, are used for reproducing an image. Resolution is measured in units of dpi (dots per inch). The output resolution can be set independently for the main scan and sub scan. Normally, you should choose the setting that matches the resolution of the output device you use. To find a matching resolution, follow the guidelines below.
GT-5000 / Action Scanner II Service Manual Product Description 1.8.4 Reading Area This function allows you to limit the scan to a specified portion of the document. Set the reading area by specifying the reading lengths, in units of dots, for both the main scan and the sub scan. The maximum selectable reading area is determined by the resolution and zoom settings. To specify a smaller reading area, indicate the rectangular area and offset from the origin.
Product Description GT-5000 / Action Scanner II Service Manual 1.8.6 Digital Halftoning Generally speaking, 1 bit/pixel and 2 bits/pixel formats cannot express continuous image tones. The halftoning mode processes the scanned image data so that the data output in these formats simulates continuous tones when displayed or printed.
GT-5000 / Action Scanner II Service Manual Product Description 1.8.7 Color Correction The color correction function can operate only when the scanner is in color line sequence mode, under which pixel color is determined immediately upon scanning. Four color-correction settings are provided. To disable color correction, select either color page sequence reading or monochrome reading.
Product Description GT-5000 / Action Scanner II Service Manual 1.8.10 Gamma Correction This function adjusts the image input/output light-intensity ratio, so that tones can be preserved when the image is output to different types of devices. This ratio is called “gamma” (γ). See Figure 1-17 for a graphical representation of the five gamma correction settings. Gamma correction is set independently of other scanner functions. This section provides an overview of the five gamma correction settings.
GT-5000 / Action Scanner II Service Manual Product Description 1.9 MAIN COMPONENTS To simplify maintenance and repair, the main components of the GT-5000/ActionScanner II have been designed for easy removal and replacement.
Product Description GT-5000 / Action Scanner II Service Manual 1.9.1 B034 MAIN/ B034 MAIN-B Contol Board The B034 MAIN/B034 MAIN-B boards are the main circuit board in the scanner, containing a logic circuit and scanner engine driver circuit.
GT-5000 / Action Scanner II Service Manual Product Description 1.9.2 B034 PSB/PSE Power Supply Board The power supply unit consists of a switching regulator circuit, which converts the AC line voltage to the DC voltages (for example, +24 VDC, +5 VDC, and +12 VDC) used by the scanner. The B034 PSB board uses a 120 V input type, and the B034 PSE board uses a 220/240 V input type. Figure 1-23. B034 PSB/PSE Board 1.9.
Product Description GT-5000 / Action Scanner II Service Manual 1.9.4 Lower Case with Scanner Mechanism The lower case includes the scanner mechanism components. Among these components are the carriage motor, the carriage mechanism, the home position sensor, and the scanner head. Figure 1-25. Lower Case with Scanner Mechanism 1.9.5 Upper Case The upper case includes the document glass. Figure 1-26. Upper Case 1-28 Rev.
Chapter 2 Operating Principles Table of Contents 2.1 ENGINE OPERATIONS 2-1 2.1.1 Scanner Head Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 2.1.2 Carriage Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4 2.2 POWER SUPPLY OPERATIONS 2-5 2.2.1 Power Supply Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5 2.2.2 Supply Circuit Operations. . . . . . . . . . . . . . . . . . . .
GT-5000 / Action Scanner II Service Manual Operating Principles 2.1 ENGINE OPERATIONS This section describes the functions and operating principles of the GT-5000/ActionScanner II engine. The engine contains a CCD image sensor with a reading resolution of 300 dpi. The engine consists of two main sections: the sensor head and the carriage-movement mechanism. 2.1.1 Scanner Head Operations The scanner head (carriage assembly) is comprised of the CCD image sensor and the light source used to enable reading.
Operating Principles GT-5000 / Action Scanner II Service Manual Photosensitive Section The photosensitive section converts the light energy into electrical signals and accumulates the resulting signal charge over a short term. The description below explains the process of photoelectrical conversion to change the incoming light energy into an accumulated signal charge.
GT-5000 / Action Scanner II Service Manual Operating Principles Transmission Section This section receives the signal charge from the photosensitive section and transfers it to the output section. The transmission section contains two capacitors for each photodiode in the photosensitive section. There is only one output section, which means that the signal charge for each pixel must be sent separately to the output section. This operation is illustrated in the diagram and explained below.
Operating Principles GT-5000 / Action Scanner II Service Manual 2.1.2 Carriage Operations Because photosensor elements are aligned and have a one-to-one correspondence with a horizontal row of pixels, no mechanical operation is required for the main scan (one horizontal reading of the original document). To read more than a single line, however, vertical movement (sub-scanning) is also necessary. This requires mechanical movement of the scanner head.
GT-5000 / Action Scanner II Service Manual Operating Principles 2.2 POWER SUPPLY OPERATIONS The scanner can be powered by either of two power supply boards: the 120 V B034 PSB board or the 220/240 V B034 PSE board. The only difference in the way these boards operate is in the primary circuitry. These power boards output the DC voltage necessary to drive the scanner control circuits and carriage drive mechanism. Table 2-1 shows the input voltages and fuse ratings for these boards. Table 2-1.
Operating Principles GT-5000 / Action Scanner II Service Manual The +12 VDC line contains a voltage overload protection circuit. The +12 V voltage overload protection circuit cuts the supply if the voltage reaches or exceeds +16 VDC. It stops the switching circuit operation, which stops the output of the +24 VDC line. The +24 VDC line has a voltage overload protection circuit and a voltage drop protection circuit.
GT-5000 / Action Scanner II Service Manual Operating Principles 2.3 CONTROL CIRCUITS This section describes the control circuit. 2.3.1 Control Circuit Outline The scanner CPU is a 16-bit, single-chip H8/3003. To simplify the circuitry, the circuits for correcting the image data signals are collected into a gate array. Figure 2-9 is a block diagram of the control circuitry.
Operating Principles GT-5000 / Action Scanner II Service Manual Original Document CCD AMP. A/D Converter 8 bits/ pixel Scanner Head Shading Correction Gamma Correction Color Correction Zoom Halftoning Data Output Figure 2-10. Sequence of Operations Figure 2-10 shows the sequence of operations, starting from the point where image data is input into the GT-5000/ActionScanner II, and ending with the output of image data to a computer. 1.
GT-5000 / Action Scanner II Service Manual Operating Principles Table 2-3 lists the functions of the scanner’s main elements. Table 2-3. Functions of Main Elements Element Location Function H8/3003 CPU IC5 The CPU, which operates at 8 MHz, controls scanner operations.
Operating Principles GT-5000 / Action Scanner II Service Manual 2.3.2 Reset Circuit Figure 2-11 shows the reset circuit used to reset the controls. Immediately after power on and power off, the +5 VDC line voltage drops, and the reset IC (IC4, M51953AFP) outputs the reset signal from pin 6 (OUT port). +5 V 7 IN OUT 6 RESET Reset IC M51953AFP (IC 4) Figure 2-11. Block Diagram for Reset Circuit 2.3.
GT-5000 / Action Scanner II Service Manual Operating Principles 2.3.4 Carriage Motor Drive Circuit A constant current drives the carriage motor, a stepping motor that requires changes in the excitation status to generate rotation. Table 2-4 indicates the relationship between the input and output excitation phase data of the M54670P motor driver. Table 2-5 indicates the excitation sequence required to rotate the motor, and Figure 2-14 shows the motor’s internal wiring.
Operating Principles GT-5000 / Action Scanner II Service Manual 2.3.5 Image Sensor Drive Circuit Figure 2-15 is a block diagram of the image sensor drive circuit. Gate array E02A14 controls image sensor operations. The sensor receives the following control signals: the SH signal, which drives the main sensor’s shift electrode; transmission pulses F1 and F2 , which transmit the signal charges (described as φ1 and φ2, in Section 2.1.
GT-5000 / Action Scanner II Service Manual Operating Principles INT (Photo-signal accumulation period) SH F1 RS OS Dummy signals Effective pixel signals Dummy signals Single-line output period Figure 2-16. Image Sensor Control Process Connector CN3 Scanner Head Fluorescent Lamps LMP1-3 GA E02A14 IC6 Figure 2-17. Lamp Control Circuit Block Diagram Rev.
Chapter 3 Disassembly and Assembly Table of Contents 3.1 BEFORE BEGINNING DISASSEMBLY OR ASSEMBLY 3.1.1 Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.1.2 Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.1.3 Small Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.1.4 Service Shipping Checklist. . . . . . . . . . . . . . .
GT-5000 / Action Scanner II Service Manual Disassembly and Assembly 3.1 BEFORE BEGINNING DISASSEMBLY OR ASSEMBLY This section describes the precautions to take during disassembly or assembly, the tools required, and the small parts used in the scanner. 3.1.1 Precautions WARNING Before disassembling or assembling the scanner, disconnect the power supply cable from the external AC power socket. Failure to do so risks personal injury.
Disassembly and Assembly GT-5000 / Action Scanner II Service Manual 3.1.3 Small Parts In the following sections, abbreviations are used for small parts, such as screws and washers. Tables 3-2 and 3-3 list these abbreviations. Table 3-2.
GT-5000 / Action Scanner II Service Manual Disassembly and Assembly 3.1.4 Service Shipping Checklist Before returning the scanner to the customer, use the checklist below to ensure that it is ready for return. Table 3-4. Service Shipping Checklist Category Component Do all 3 fluorescent lights switch on normally? Checked, Not necessary Carriage mechanism Is movement smooth? Checked, Not necessary Checked, Not necessary Self-test Cleaning Return shipping condition Separate items Rev.
Disassembly and Assembly GT-5000 / Action Scanner II Service Manual 3.2 DISASSEMBLY AND ASSEMBLY This section describes how to disassemble and assemble the main components of the scanner. When the procedure for installing a component in the scanner is simply the reverse of the procedure for removing that component from the printer, no installation description is given. 3.2.1 Removing the Upper Case 1. Open the document cover, and remove the document cover. 2.
GT-5000 / Action Scanner II Service Manual Disassembly and Assembly 3.2.3 Removing the Carriage Assembly 1. Remove the document cover and upper case. (Refer to Section 3.2.1.) 2. Disconnect FFCs from connectors CN2 and CN3 on the B034 MAIN/MAIN-B board. 3. Remove the FFCs along with ferrite core from the lower case. 4. Remove the CPS-tite (PS) (M3 × 6) screw and remove the spring from the driven pulley holder. 5. Remove the timing belt from the pulleys. 6. Lift up the carriage assembly.
Disassembly and Assembly GT-5000 / Action Scanner II Service Manual 3.2.4 Removing the B034 PSB/PSE Power Supply Board 1. Remove the bottom plate. (Refer to Section 3.2.2.) 2. Remove 3 CBP-tite (M3 × 12) screws. 3. Disconnect the 2 cables on the board, and then remove the board. CAUTION Turn the main unit over onto a soft cloth so that the glass will not be damaged.
GT-5000 / Action Scanner II Service Manual Disassembly and Assembly 3.2.5 Removing the B034 MAIN/MAIN-B Board 1. Remove the bottom plate. (Refer to Section 3.2.2.) 2. Remove the upper case. (Refer to Section 3.2.1.) 3. Disconnect FFCs from connectors CN2 and CN3 on the B034 MAIN/MAIN-B board. 4. Disconnect connectors CN6, 7, 4, and 1 on the B034 MAIN/MAIN-B board. 5. Remove 2 CBB-tite (M3 × 12) screws. 6. Remove a CBS-tite (M3 × 8) screw, a CBS-tite (M2.
Disassembly and Assembly GT-5000 / Action Scanner II Service Manual 3.2.6 Removing the CR Motor 1. Remove the upper case. (Refer to Section 3.2.1) 2. Loosen the CPS-tite (PS) (M3 × 6) screw of driven pulley holder fixed. 3. Remove the timing belt from the pulleys. 4. Remove the bottom plate. (Refer to Section 3.2.3.) 5. Disconnect connectors CN1 on the B034 MAIN/MAIN-B board. 6. Remove a CBP-tite (M3 × 12) screw and 2 CBS-tite (M3 × 6) screws from the motor frame. 7. Remove the motor frame.
GT-5000 / Action Scanner II Service Manual Disassembly and Assembly 3.2.7 Removing the HP Sensor 1. Remove the bottom plate. (Refer to Section 3.2.2.) 2. Remove the upper case. (Refer to Section 3.2.1.) 3. Disconnect connector CN6 on the B034 MAIN/MAIN-B board. 4. Remove the tab holding the HP sensor. HP Sensor Figure 3-9. Remove the HP Sensor Rev.
Disassembly and Assembly GT-5000 / Action Scanner II Service Manual 3.2.8 Disassembling the Carriage Assembly 1. Remove the document cover and the upper case. (Refer to Section 3.2.1.) 2. Remove the carriage assembly. (Refer to Section 3.2.3.) 3. Remove the 4 CPS-tite (O) screws and then remove the CR cover. 4. Remove the inverter board with lamp. 5. Disconnect connectors FFC and lamp connectors. CAUTION Do not touch lamp glass surface.
Chapter 4 Adjustments No Adjustment is required in this product.
Chapter 5 Troubleshooting Table of Contents 5.1 OVERVIEW 5-1 5.2 SELF-DIAGNOSTIC FUNCTION 5-1 5.3 TROUBLESHOOTING 5-2 5.3.1 Troubleshooting Abnormal Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2 5.4 REPAIR OF THE POWER SUPPLY BOARD 5-8 5.5 REPAIR OF THE MAIN CONTROL BOARD 5-9 List of Tables Table 5-1. Motor Coil Resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 5-2. Sensor Status. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GT-5000 / Action Scanner II Service Manual Troubleshooting 5.1 OVERVIEW The GT-5000/ActionScanner II has a sophisticated, built-in self-diagnostic function that reduces troubleshooting time by identifying failed components. The following tables show motor resistance ratings and sensor test points. Table 5-1. Motor Coil Resistance Motor Resistance Carriage motor Coil resistance 15.0 Ω ± 10% (25° C, 77° F) Table 5-2.
Troubleshooting GT-5000 / Action Scanner II Service Manual 5.3 TROUBLESHOOTING This section describes how to troubleshoot abnormal operations and repair the unit. 5.3.1 Troubleshooting Abnormal Operations The table below tells how to identify malfunctions by symptom, determine their cause, and resolve them. Each entry in the table below refers you to a more detailed troubleshooting table. Table 5-4.
GT-5000 / Action Scanner II Service Manual Troubleshooting Table 5-5. OPERATE LED Does Not Light Cause Step Checkpoint Finding Solution 1 Verify whether connector CN1 on the B034 PSB/ PSE board has been disconnected? Yes Connect CN1 on B034 PSB/PSE board. Connector CN2 on the B034 PSB/PSE board may be disconnected. 2 Check whether connector CN2 on the B034 PSB/ PSE board has been disconnected? Yes Connect CN2 on B034 PSB/PSE board. The fuse on the B034 PSB/PSE board may have blown.
Troubleshooting GT-5000 / Action Scanner II Service Manual Table 5-5. OPERATE LED Does Not Light (Continued) Cause Step Checkpoint Finding Solution 6 Disconnect connector CN3 on the B034 MAIN/ MAIN-B board and power on. Does the OPERATE LED come on? Yes Replace the inverter board in the scanner head. Scanner head may be dead. 7 Disconnect connector CN2 on the B034 MAIN/ MAIN-B board and power on. Does the OPERATE LED come on? Yes Replace the scanner head. B034 MAIN/ MAIN-B board may be dead.
GT-5000 / Action Scanner II Service Manual Troubleshooting Table 5-7. Carriage Does Not Move Cause The B034 PSB/PSE board may be dead. The carriage mechanism is defective. Step Checkpoint 1 With power on, is there an output of +24 VDC between pin 9 (+) and pin 8 (–) for CN2 on B034 PSB/PSE board? 2 Turn off the scanner and try to move the carriage manually. Does the carriage move smoothly? The B034 MAIN/ MAIN-B board may be dead. Rev. A 3 4 Solution No Replace the B034 PSB/PSE board.
Troubleshooting GT-5000 / Action Scanner II Service Manual Table 5-8. Carriage Moves and Crashes into Frame Cause Step HP sensor may be bad. 1 Checkpoint Finding — — Solution Replace the HP sensor. Table 5-9. Lamps Do Not Light Cause Step Checkpoint Finding Solution Connector CN3 on the B034 MAIN/ MAIN-B board may be disconnected. 1 Is connector CN3 on the B034 MAIN/ MAIN-B board disconnected? Yes Connect CN3 on the B034 MAIN/ MAIN-B board.
GT-5000 / Action Scanner II Service Manual Troubleshooting Table 5-11. Image Unclear Cause Step Checkpoint Finding Solution The document glass may be dirty. 1 Does the scanner work after you clean the glass inside and outside? Yes Scanner OK. The scanner head may be dead. 2 Does the scanner work after you replace the scanner head? Yes Scanner OK. The B034 MAIN/ MAIN-B board may be dead. 3 — — Replace the B034 MAIN/ MAIN-B board. Table 5-12.
Troubleshooting GT-5000 / Action Scanner II Service Manual 5.4 REPAIR OF THE POWER SUPPLY BOARD This section provides instructions for repairing a defective power supply board. Servicers who do not repair to the component level (including all servicers in the U.S.) can ignore this section. This table describes various problems, likely causes, checkpoints, and solutions.
GT-5000 / Action Scanner II Service Manual Troubleshooting 5.5 REPAIR OF THE MAIN CONTROL BOARD This section provides instructions for repairing a defective main board. Servicers who do not repair to the component level (including all servicers in the U.S.) can ignore this section. This table describes various problems, likely causes, checkpoints, and solutions.
Troubleshooting GT-5000 / Action Scanner II Service Manual Table 5-15. Repair of the Main Control Board (Continued) Problem Condition Cause Checkpoint Defective IC8. Check the input of pins 3 and 5 of IC8. Replace IC8. The carriage Defective IC5. does not stop at the home position. Does the input of pin 25 of IC5 go from LOW to HIGH when the carriage enters home position? If signal changes from LOW to HIGH, replace IC5. Fatal error is CR motor does displayed. not run.
Chapter 6 Maintenance Table of Contents 6.1 MAINTENANCE 6-1 6.2 LUBRICATION 6-1 List of Figures Figure 6-1. Lubrication Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2 Figure 6-2. Lubrication Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3 List of Tables Table 6-1. Recommended Lubricants . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1 Table 6-2. Lubrication Points. . . . . . . . . . . . . . . . . . . .
GT-5000 / Action Scanner II Service Manual Maintenance 6.1 MAINTENANCE This scanner requires appropriate cleaning to maintain it in optimal conditions over a long period and to prevent problems. Use a neutral cleaning agent to remove external dirt, and use a vacuum cleaner to remove dust and other debris. Be sure that the document cover glass is free of dirt. Dirt on the glass can reduce reading quality. If the glass is dirty, clean it with a dry, soft cloth.
Maintenance GT-5000 / Action Scanner II Service Manual (1) G20 Figure 6-1. Lubrication Points 6-2 Rev.
GT-5000 / Action Scanner II Service Manual Maintenance 20mm 10mm 120mm 10mm 110mm 10mm 5.5 mm Figure 6-2. Lubrication Method Rev.
APPENDIX Table of Contents A.1 CONNECTOR PIN ASSIGNMENTS A-1 A.2 CIRCUIT DIAGRAM A-5 A.3 CIRCUIT BOARD COMPONENT LAYOUT A-10 A.4 EXPLODED DIAGRAM A-13 List of Figures Figure A-1. Cable Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1 Figure A-2. B034 MAIN Circuit Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-5 Figure A-3. B034 MAIN-B Circuit Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-6 Figure A-4.
GT-5000 / Action Scanner II Service Manual Appendix A.1 CONNECTOR PIN ASSIGNMENTS Figure A-1 illustrates the interconnection of the primary components. Table A-1 summarizes the functions and sizes of the connectors. SCSI or None AC input Parallel I/F or SCSI CN1 CN9 CN8 B034 PSB/PSE board B034 MAIN/ MAIN-B board CN2 CN4 CN3 CN2 CN1 CN6 CN7 Invertor board R.G.B Lamp Scanner head CCD board CR motor HP sensor LED Figure A-1. Cable Connections Rev.
Appendix GT-5000 / Action Scanner II Service Manual Table A-1.
GT-5000 / Action Scanner II Service Manual Appendix Table A-2. CN1 Pin Assignments Pin No. 1 2 3 4 Signal Name I/O A B A B O O O O Description Carriage motor phase B Carriage motor phase B Carriage motor phase A Carriage motor phase B Table A-3. CN2 Pin Assignments Pin No.
Appendix GT-5000 / Action Scanner II Service Manual Table A-6. CN6 Pin Assignments Pin No. 1 2 3 Signal Name I/O HP GND +5 I — — Description HP signal GND +5 VDC Table A-7. CN7 Pin Assignments Pin No. 1 2 3 4 A-4 Signal Name I/O ERROR POWER READY +5 O O O — Description ERROR LED POWER LED READY LED +5 VDC Rev.
GT-5000 / Action Scanner II Service Manual Appendix A.2 CIRCUIT DIAGRAMS Figure A-2. B034 MAIN Circuit Diagram Rev.
Appendix GT-5000 / Action Scanner II Service Manual Figure A-3. B034 MAIN-B Circuit Diagram A-6 Rev.
Rev. A D B1 1 0.1U C2 4 3 4 F1 2.5A /1 25 V 3 0 0K /0 .5 W R1 2 FG 2 20 0 P C4 C5 2 20 0 P 1 2 C N1 N 3 30 U /20 0 V 10 0-1 20 V A C L 3 .9/5W R2 0.1U C1 E LF 1 8D 29 0G L1 FG 2 2 20 0 P C3 1 D 2S B A 60 3 C 11 R 12 * 1: H E A T S IN K 1 6K R 19 1.5/2 W *1 1 1 E Q S 04 D2 Q1 2 S K 1 3 51 4 70P /2 K V C 15 R21 4 .7 K C 4 40 8 Q2 IC 1 2.4K R20 T L 43 1 R 16 1K 510 R 15 3 C 13 0 .0 1U R 34 C 31 2 1 R 14 5 10 Q3 A 168 0 D1 C 12 2 2U 3 5V 4 .
D B1 D 2SB A 60 1 C3 FG 2 2 2 00 P L1 1 3 4 C2 0.1 U 4 3 E LF 1 8D 2 9 0 C C1 0 .1 U R1 1M /0 .5 W R2 2 C5 22 0 0P C4 2 2 00 P FG 1 0/5W F1 T 1.25 A H /25 0 V L N 1 0 0U /4 0 0V 1 2 CN1 2 2 0-2 4 0 V A C C 11 R 12 3 .0 /2 W R 19 1 6K * 1: H E A T S INK C 15 *1 R 28 3 00 K /0.5W 2S K1603 1 00P /2 K V Q1 D2 11E QS 0 4 R 21 4 .7K Q2 C 44 08 C31 47 0 0 P /1K V D1 C 16 1 00 P 2KV R 11 R 14 51 0 Q3 A 1 6 80 1 2 C 12 22 U 35V R 13 4.7K 11 EQS 04 1 5 0/0 .
Rev. A 0. 1u C6 1 1 1 11 1 1 8 7 6 54 3 2 NNNNNNN CCCCCCC 100 R1 C1 2. 2u 3 C2 0. 1u D F F O O O R 1 1 NNNNN S S D S B A CCCCC 1 2 3 4 5 6 7 89 1 1 0 1 2 2 2 1 2 1 0 9 S S F F S H 2 2 B A 1 2 R3 1. 2k Q1 C4 1 1 6 R2 100 10 R9 I C1 T CD1 2 5 1 UD I L - F PC- 1 2 S T - N CN1 100p 180 1 2 3 4 5 6 7 8 9 10 11 12 220p C3 220p C5 180 R1 2 180 R1 0 C4 R1 1 GT-5000 / Action Scanner II Service Manual Appendix Figure A-6.
Appendix GT-5000 / Action Scanner II Service Manual A.3 CIRCUIT BOARD COMPONENT LAYOUTS Figure A-7. B034 MAIN Component Layout (Side-A) Figure A-8. B034 MAIN Component Layout (Side-B) A-10 Rev.
GT-5000 / Action Scanner II Service Manual Appendix Figure A-9. B034 MAIN-B Component Layout (Side-A) Figure A-10. B034 MAIN-B Component Layout (Side-B) Rev.
Appendix GT-5000 / Action Scanner II Service Manual Figure A-11. B034 PSB Component Layout Figure A-12. B034 PSE Component Layout A-12 Rev.
GT-5000 / Action Scanner II Service Manual Appendix A.4 EXPLODED DIAGRAMS Figure A-13. Exploded Diagram Rev.
Appendix GT-5000 / Action Scanner II Service Manual Figure A-14. Exploded Diagram A-14 Rev.
GT-5000 / Action Scanner II Service Manual Appendix Table A-7. Part No. Reference Table Ref. No. 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 125 126 127 129 130 131 132 133 134 136 138 139 140 141 142 143 144 145 146 147 148 149 Rev.
Appendix GT-5000 / Action Scanner II Service Manual Table A-7. Part No. Reference Table (Continued) Ref. No. Description 150 151 152 153 154 155 156 157 158 159 160 162 163 164 165 168 169 CARRIAGE ASSEMBLY (Scanner Head) LAMP INVERTER BOARD CARRIAGE SLIDER CR COVER ROLLER HOLDER GROUND BRUSH INVERTER CABLE (FFC) CR SLIT HOLDER CARRIAGE ROLLER BELT CLAMP CB SCREW (M3 × 4) TIMING BELT MOUNT PLATE TIMING BELT CBS(O) SCREW (M3 × 5) LAMP COVER FERRITE CORE CARRIAGE ASSY. LAMP ASSY. BOARD ASSY.
EPSON OVERSEAS MARKETING LOCATIONS EPSON AMERICA, INC 20770 Madrona Avenue, P.O. Box 2842 Torrance, CA 90509-2842 Phone: (800) 922-8911 Fax: (310) 782-5220 EPSON DEUTCHLAND GmBH Zülipicher Straße 6, 40549 Düsseldorf Germany Phone: 0211-56030 Fax: 0211-504-7787 EPSON UK LTD. Campus 100, Maylands Avenue, Hemel Hempstead, Herts, HP2 7TJ, U.K. Phone: 1442-61144 Fax: 1442-227227 EPSON FRANCE S.A. 68 bis, rue Marjolin 92300, Levallois-Perret, France Phone: 02-262331 Fax: 02-2440750 EPSON IBERICA Avda.
EPSON
