Epson ActionScanner II Servisní příručka

EPSON IMAGE SCANNERGT-5000Action Scanner IISERVICE MANUALEPSON4005296

1.1 FEATURESThe GT-5000 and ActionScanner II are low-cost, high-resolution (300 dpi) color image scanners for A4 orletter-size sheets. These scanners

Table 1-1. Optional UnitsModel DescriptionB80801* Bidirectional parallel interface board, PC-compatible (for Bi-D model)B860081 SCSI system cable, 25-

1.2 SPECIFICATIONSThis section provides specifications for the GT-5000 and ActionScanner II.1.2.1 Basic SpecificationsProduct type: Flatbed color imag

1.2.3 Resistance to Electric NoiseStatic electricity: Panel - 10 KVMetal - 7 KV1.2.4 Environmental ConditionsTemperatureOperating: 5 to 35° C (41 to 9

1.3 INTERFACE SPECIFICATIONSThis scanner has two models, one is Bi-directional interface models, one is SCSI models.1.3.1 Bidirectional Parallel Inter

Table 1-2. Pin Assignments for the Bidirectional Parallel InterfacePin No. Signal Name I/O Description1STROBE ITheSTROBEpulseusedtoreadinorsendoutdata

1.3.2 SCSIThis section describes the SCSI interface.1.3.2.1 Basic SpecificationsAny items not included in this service manual are in conformance with

1.3.2.2 SCSI CommandsThis device uses the following group “0" processor commands:Table 1-3. Commands for SCSI InterfaceCommand Code DescriptionTe

1.3.2.4 SCSI MessagesTable 1-5. Messages for SCSI InterfaceMessage Code Direction Completion of ATNCommand Complete 00H In —Disconnect 04H In —Bus Dev

1.4 BUTTONS AND INDICATORSThis scanner has two push buttons and three LED indicators for easy operation.ButtonsOPERATETurns the scanner on and off. Wh

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1.6 ERRORSWhen an error occurs, the scanner displays the corresponding error message using the LEDs.Command ErrorsCause: An unidentified command is de

1.7 DATA TRANSMISSION PROTOCOLThis section describes the data transmission protocol used by the scanner and host computer.1.7.1 Handshaking Control Co

1.7.2 Data Block Handshaking ProcedureScanner Data RequestStep 1 The host computer sends a control code.Step 2 The scanner sends a data block.Monochro

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

Byte Sequence Mode ReadingStep 1 The host computer sends a control code.Step 2 The scanner sends 1 data line.Step 3 The host computer responds:ACK (06

1.7.3 Data Block FormatsThis section describes two data block formats.Line data format Consists of a 4-byte information block, or a 1-line image data

1.7.3.2 Block Data FormatInformation BlockHeader STX code (02H)The header indicates the beginning of a data block.Status Refer to Section 1.6.4.Byte c

The Meaning of Each Status BitBit 7: Fatal error flag. Set when a system error occurs.Bit 6: Reserved.Bit 5: Area end flag.For color reading, set to 1

1.8 SCANNER FUNCTIONSTable 1-8 summarizes the scanner’s functions and settings. These functions, which are explained on thefollowing pages, are all co

1.8.2 Output ResolutionThe output resolution determines how many pixels, or dots, are used for reproducing an image. Resolution ismeasured in units of

NOTICEAll rights reserved. Reproduction of any part of this manual in any form whatsoever without SEIKOEPSON’s express written permission is forbidden

1.8.4 Reading AreaThis function allows you to limit the scan to a specified portion of the document. Set the reading area byspecifying the reading len

1.8.6 Digital HalftoningGenerally speaking, 1 bit/pixel and 2 bits/pixel formats cannot express continuous image tones. Thehalftoning mode processes t

1.8.7 Color CorrectionThe color correction function can operate only when the scanner is in color line sequence mode, under whichpixel color is determ

1.8.10 Gamma CorrectionThis function adjusts the image input/output light-intensity ratio, so that tones can be preserved when theimage is output to d

1.9 MAIN COMPONENTSTo simplify maintenance and repair, the main components of the GT-5000/ActionScanner II have beendesigned for easy removal and repl

1.9.1 B034 MAIN/ B034 MAIN-B Contol BoardThe B034 MAIN/B034 MAIN-B boards are the main circuit board in the scanner, containing a logic circuitand sca

1.9.2 B034 PSB/PSE Power Supply BoardThe power supply unit consists of a switching regulator circuit, which converts the AC line voltage to the DCvolt

1.9.4 Lower Case with Scanner MechanismThe lower case includes the scanner mechanism components. Among these components are the carriagemotor, the car

Chapter 2 Operating PrinciplesTable of Contents2.1 ENGINE OPERATIONS 2-12.1.1 ScannerHeadOperations...2-12.1.2 Carri

2.1 ENGINE OPERATIONSThis section describes the functions and operating principles of the GT-5000/ActionScanner II engine. Theengine contains a CCD im

PRECAUTIONSPrecautionary notations throughout the text are categorized relative to 1) personal injury and 2) damage toequipment.DANGERSignals a precau

Photosensitive SectionThe photosensitive section converts the light energy into electrical signals and accumulates the resultingsignal charge over a s

Transmission SectionThis section receives the signal charge from the photosensitive section and transfers it to the output section.The transmission se

2.1.2 Carriage OperationsBecause photosensor elements are aligned and have a one-to-one correspondence with a horizontal row ofpixels, no mechanical o

2.2 POWER SUPPLY OPERATIONSThe scanner can be powered by either of two power supply boards: the 120 V B034 PSB board or the220/240 V B034 PSE board. T

The +12 VDC line contains a voltage overload protection circuit. The +12 V voltage overload protectioncircuit cuts the supply if the voltage reaches o

2.3 CONTROL CIRCUITSThis section describes the control circuit.2.3.1 Control Circuit OutlineThe scanner CPU is a 16-bit, single-chip H8/3003. To simpl

Figure 2-10 shows the sequence of operations, starting from the point where image data is input into theGT-5000/ActionScanner II, and ending with the

Table 2-3 lists the functions of the scanner’s main elements.Table 2-3. Functions of Main ElementsElementLocation FunctionH8/3003CPUIC5 The CPU, which

2.3.2 Reset CircuitFigure 2-11 shows the reset circuit used to reset the controls. Immediately after power on and power off, the+5 VDC line voltage dr

2.3.4 Carriage Motor Drive CircuitA constant current drives the carriage motor, a stepping motor that requires changes in the excitation status togene

PREFACEThis manual describes functions, theory of electrical and mechanical operations, maintenance, and repair ofGT-5000 / Action Scanner II.The inst

2.3.5 Image Sensor Drive CircuitFigure 2-15 is a block diagram of the image sensor drive circuit. Gate array E02A14 controls image sensoroperations. T

INT (Photo-signal accumulation period)SHF1RSOSDummy signalsDummysignalsEffective pixel signalsSingle-line output periodFigure 2-16. Image Sensor Contr

Chapter 3 Disassembly and AssemblyTable of Contents3.1 BEFORE BEGINNING DISASSEMBLY OR ASSEMBLY 3-13.1.1 Precautions...

3.1 BEFORE BEGINNING DISASSEMBLY OR ASSEMBLYThis section describes the precautions to take during disassembly or assembly, the tools required, and the

3.1.3 Small PartsIn the following sections, abbreviations are used for small parts, such as screws and washers. Tables 3-2 and3-3 list these abbreviat

3.1.4 Service Shipping ChecklistBefore returning the scanner to the customer, use the checklist below to ensure that it is ready for return.Table 3-4.

3.2 DISASSEMBLY AND ASSEMBLYThis section describes how to disassemble and assemble the main components of the scanner. When theprocedure for installin

3.2.3 Removing the Carriage Assembly1. Remove the document cover and upper case. (Refer to Section 3.2.1.)2. Disconnect FFCs from connectors CN2 and C

3.2.4 Removing the B034 PSB/PSE Power Supply Board1. Remove the bottom plate. (Refer to Section 3.2.2.)2.Remove 3 CBP-tite (M3 × 12) screws.3. Disconn

3.2.5 Removing the B034 MAIN/MAIN-B Board1. Remove the bottom plate. (Refer to Section 3.2.2.)2. Remove the upper case. (Refer to Section 3.2.1.)3. Di

REVISION SHEETRevision Issue Date Revision PageRev. A September 18, 1995 1st issue-v-

3.2.6 Removing the CR Motor1. 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

3.2.7 Removing the HP Sensor1. Remove the bottom plate. (Refer to Section 3.2.2.)2. Remove the upper case. (Refer to Section 3.2.1.)3. Disconnect conn

3.2.8 Disassembling the Carriage Assembly1. Remove the document cover and the upper case. (Refer to Section 3.2.1.)2. Remove the carriage assembly. (R

Chapter 4 AdjustmentsNo Adjustment is required in this product.

Chapter 5 TroubleshootingTable of Contents5.1 OVERVIEW 5-15.2 SELF-DIAGNOSTIC FUNCTION 5-15.3 TROUBLESHOOTING 5-25.3.1 Troubleshooting Abnormal Operat

5.1 OVERVIEWThe GT-5000/ActionScanner II has a sophisticated, built-in self-diagnostic function that reducestroubleshooting time by identifying failed

5.3 TROUBLESHOOTINGThis section describes how to troubleshoot abnormal operations and repair the unit.5.3.1 Troubleshooting Abnormal OperationsThe tab

Table 5-5. OPERATE LED Does Not LightCause Step Checkpoint Finding SolutionConnector CN1 on theB034 PSB/PSE board maybe disconnected.1Verify whether c

Table 5-5. OPERATE LED Does Not Light (Continued)Cause Step Checkpoint Finding SolutionInverter board in thescanner head may be dead.6Disconnect conne

Table 5-7. Carriage Does Not MoveCause Step Checkpoint Finding SolutionThe B034 PSB/PSE boardmay be dead.1With power on, is there anoutput of +24 VDC

TABLE OF CONTENTSCHAPTER 1. GENERAL DESCRIPTIONCHAPTER 2. OPERATING PRINCIPLESCHAPTER 3. DISASSEMBLY AND ASSEMBLYCHAPTER 4. ADJUSTMENTSCHAPTER 5. TROU

Table 5-8. Carriage Moves and Crashes into FrameCause Step Checkpoint Finding SolutionHP sensor may be bad. 1 — —Replace the HPsensor.Table 5-9. Lamps

Table 5-11. Image UnclearCause Step Checkpoint Finding SolutionThe document glass maybe dirty.1Does the scanner workafter you clean the glassinside an

5.4 REPAIR OF THE POWER SUPPLY BOARDThis section provides instructions for repairing a defective power supply board. Servicers who do not repairto the

5.5 REPAIR OF THE MAIN CONTROL BOARDThis section provides instructions for repairing a defective main board. Servicers who do not repair to thecompone

Table 5-15. Repair of the Main Control Board (Continued)Problem Condition Cause Checkpoint SolutionFatal error isdisplayed.CR motor doesnot run.Defect

Chapter 6 MaintenanceTable of Contents6.1 MAINTENANCE 6-16.2 LUBRICATION 6-1List of FiguresFigure6-1. LubricationPoints...

6.1 MAINTENANCEThis scanner requires appropriate cleaning to maintain it in optimal conditions over a long period and toprevent problems. Use a neutra

(1)G20Figure 6-1. Lubrication PointsMaintenance GT-5000 / Action Scanner II Service Manual6-2 Rev. A

5.5 mm20mm10mm120mm10mm110mm10mmFigure 6-2. Lubrication MethodGT-5000 / Action Scanner II Service Manual MaintenanceRev. A 6-3

APPENDIXTable of ContentsA.1 CONNECTOR PIN ASSIGNMENTS A-1A.2 CIRCUIT DIAGRAM A-5A.3 CIRCUIT BOARD COMPONENT LAYOUT A-10A.4 EXPLODED DIAGRAM A-13List

Chapter 1 Product DescriptionTable of Contents1.1 FEATURES 1-11.2 SPECIFICATIONS 1-31.2.1 BasicSpecifications...

A.1 CONNECTOR PIN ASSIGNMENTSFigure A-1 illustrates the interconnection of the primary components. Table A-1 summarizes the functionsand sizes of the

Table A-1. Board Connector SummaryConnector Description Pins ReferenceB034 MAIN/ MAIN-B Control Circuit BoardCN1 Connector for CR motor 4 pins Table A

Table A-2. CN1 Pin AssignmentsPin No. Signal Name I/O Description1 A O Carriage motor phase B2B O Carriage motor phase B3A O Carriage motor phase A4 B

Table A-6. CN6 Pin AssignmentsPin No. Signal Name I/O Description1 HP I HP signal2 GND — GND3+5 —+5VDCTable A-7. CN7 Pin AssignmentsPin No. Signal Nam

A.2 CIRCUIT DIAGRAMSFigure A-2. B034 MAIN Circuit DiagramGT-5000 / Action Scanner II Service Manual AppendixRev. A A-5

Figure A-3. B034 MAIN-B Circuit DiagramAppendix GT-5000 / Action Scanner II Service ManualA-6 Rev. A

T1 PT-73 1 3 2 4DB1D2SBA60C11330U/200VR121.5/2WQ12SK1351C312200P/1KV2K VC15470P /2KVR3443K/2WD31ERA38-0511 1C16220P 2D51F5KQ100I 3O 1C 2IC 8178M

T1 PT-73 1 3 2 4DB1D2SBA60C11100U/400VR123.0/2WQ12SK1603C314700P/1KV2KVC15100P /2KVD31ER B 44-10R35R34100K /2W *211 1C16100P 2 3D51F5KQ100I 3O

OS1DOS2OD3RS4F1B5F1A6NC7NC8NC9NC10NC11SS22SH21F2B20F2A19NC18NC17NC16NC15NC14NC13NC12IC1TCD1251UDC4220pR11180C60.1uR10180R1 2180C3100pC5220pR910C12.2uR

A.3 CIRCUIT BOARD COMPONENT LAYOUTSFigure A-7. B034 MAIN Component Layout (Side-A)Figure A-8. B034 MAIN Component Layout (Side-B)Appendix GT-5000 / Ac

1.9 MAIN COMPONENTS 1-251.9.1 B034MAIN/B034MAIN-BControlBoard... 1-261.9.2 B034 PSB/PSE Power Supply Board . . . . . . . . . . .

Figure A-9. B034 MAIN-B Component Layout (Side-A)Figure A-10. B034 MAIN-B Component Layout (Side-B)GT-5000 / Action Scanner II Service Manual Appendix

Figure A-11. B034 PSB Component LayoutFigure A-12. B034 PSE Component LayoutAppendix GT-5000 / Action Scanner II Service ManualA-12 Rev. A

A.4 EXPLODED DIAGRAMSFigure A-13. Exploded DiagramGT-5000 / Action Scanner II Service Manual AppendixRev. A A-13

Figure A-14. Exploded DiagramAppendix GT-5000 / Action Scanner II Service ManualA-14 Rev. A

Table A-7. Part No. Reference TableRef. No. Description PPL Name100 UPPER HOUSING HOUSING ASSY., UPPER101 LOWER HOUSING HOUSING ASSY., LOWER102 BOTTOM

Table A-7. Part No. Reference Table (Continued)Ref. No. Description PPL Name150 CARRIAGE ASSEMBLY (Scanner Head) CARRIAGE ASSY.151 LAMP LAMP ASSY.152

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