Epson GT-12000 Service Manual

EPSONEPSONEPSON France S.A.SERVICE MANUAL GT-1200PRODUIT

PRODUCT DESCRIPTIONSCHAPTER1

ADF Operating PrinciplesRev. A2-152.1.2.6 Sensor CircuitsThe timing sensor and the paper eject/reverse sensor are reflex typesensors, and each of the

ADF Operating PrinciplesRev. A2-162.1.2.7 Switch CircuitsEach of the ADF, feeding cover and ejection cover is equipped with aopen/close sensor to det

ADF Operating PrinciplesRev. A2-172.1.2.9 Paper Feed Motor Driver CircuitThis ADF is equipped with 3 motors, and a DC motor is used for the paperfee

ADF Operating PrinciplesRev. A2-182.1.2.10 Transportation/Paper Eject/Reverse Motor Driver CircuitsStepping motors are used for the transportati

ADF Operating PrinciplesRev. A2-192.1.2.11 Feeding Solenoid/Reverse Solenoid Sensor CircuitsThis ADF is equipped with 2 solenoids; one is a feeding

ADF Operating PrinciplesRev. A2-202.1.2.13 EEPROM Transmission/Write CircuitFollowing values can be written into the EEPROM of this ADF:q Reference

TROUBLESHOOTINGCHAPTER3

ADF TroubleshootingRev. A3-13.1 OVERVIEWThis chapter describes the troubleshooting required when this ADFfunctions abnormally. Generally, defective pa

ADF TroubleshootingRev. A3-23.1.1.1 Single Feeding Test ModeWith this test mode, you can detect the defective part by setting thedocument (including

ADF TroubleshootingRev. A3-33.1.1.3 Single Feeding Without Paper Aging Test ModeWith this test mode, you can detect the defective part by putting the

GT-12000 Product DescriptionsRev. A1-11.1 OVERVIEWThe GT-12000 is an A3 size flat-bed type color image scanner. The mainfeatures of the scanner are:q

ADF TroubleshootingRev. A3-43.1.1.5 Motor Line Output Test ModeWith this test mode, you can detect the defective part by driving 3 motorsconsecutivel

ADF TroubleshootingRev. A3-53.1.2 Motor/Solenoid Internal Coil ResistanceThis section provides the check points for the motors which are founddefecti

ADF TroubleshootingRev. A3-63.1.2.2 Paper Eject/Reverse Motor Check PointA 4-phase stepping motor is also used for the paper eject/reverse motor,and

DISASSEMBLY AND ASSEMBLYCHAPTER4

ADF Disassembly and AssemblyRev. A4-14.1 OVERVIEWThis chapter describes how to dissemble the auto document feeder (ADF).If no instruction is given, as

ADF Disassembly and AssemblyRev. A4-24.2 DISASSEMBLY PROCEDUREDisassembly/Removal procedures for the major units in the ADF aredescribed in the follow

ADF Disassembly and AssemblyRev. A4-34.2.2 Control Board Unit Removal1. Turn the ADF over and remove 3 screws, then remove the shield cover.2. Disc

ADF Disassembly and AssemblyRev. A4-44.2.3 Transportation Belt Unit Removal1. Turn the ADF over.2. Fold 2 areas of the belt (indicated areas in Fig

ADF Disassembly and AssemblyRev. A4-54.2.4 Paper Feed Unit Removal1. Turn the ADF over.2. Remove 4 screws securing the paper feed unit and 1 screw

ADF Disassembly and AssemblyRev. A4-64.2.5 Paper Eject/Reverse Unit Removal1. Turn the ADF over.2. Remove 4 screws securing the paper eject/reverse

GT-12000 Product DescriptionsRev. A1-2IMAGING FUNCTIONSGradation: Input/internal process = 12bit/pixelOutput = 8 or 12bit/pixelZoom: 50 to 200% (1% in

ADF Disassembly and AssemblyRev. A4-74.2.6 Transportation Belt Drive Motor Removal1. Remove the transportation belt unit. (See Section 4.2.3.)2. Re

ADF Disassembly and AssemblyRev. A4-84.2.7 Paper Feed Motor Unit RemovalThis section describes the procedure for removing the paper feed motor inthe

ADF Disassembly and AssemblyRev. A4-94.2.8 Registration/Timing Sensor RemovalThis section describes how to remove the registration sensor and timings

ADF Disassembly and AssemblyRev. A4-104.2.9 Paper Eject/Reverse Motor Unit RemovalThis section describes how to remove the paper eject/reverse motor

ADF Disassembly and AssemblyRev. A4-114.2.10 Paper Eject Sensor RemovalThis section describes how to remove the paper eject sensor in the papereject/

ADJUSTMENTCHAPTER5

ADF AdjustmentRev. A5-15.1 OVERVIEWThis chapter describes adjustments required after disassembling andassembling the ADF or replacing specified parts.

ADF AdjustmentRev. A5-25.1.2.1 Flapper Solenoid Installation Position AdjustmentThis adjustment is made to fix the flapper solenoid at the position w

ADF AdjustmentRev. A5-35.1.2.2 Separation Plate Gap AdjustmentTo feed paper one by one from the paper feed tray into ADF in order, thegap between the

ADF AdjustmentRev. A5-45.1.2.3 Belt Tension AdjustmentThis adjustment is made to adjust tension of the timing belt used totransmit drive sent from th

GT-12000 Product DescriptionsRev. A1-3ENVIRONMENTAL CONDITIONSTemperature: Operating = 5 to 35°CStorage = -25 to 60°CHumidity: Operating = 10 to 80% (

ADF AdjustmentRev. A5-55.1.2.5 Micro Switch Installation Position AdjustmentThis adjustment is made to adjust the micro switch installation position.

ADF AdjustmentRev. A5-65.1.2.6 Skew Correction AdjustmentYou must make this adjustment when the output image appears skewedon the PC monitor or ADF i

ADF AdjustmentRev. A5-75.1.3 Electrical AdjustmentThis section describes the electrical adjustment for ADF. It consists of 3adjustment items which mus

ADF AdjustmentRev. A5-85.1.3.1 Sensor AdjustmentThis ADF is internally equipped with the following 3 photo-interruptersensors; empty sensor, registr

ADF AdjustmentRev. A5-95.1.3.2 EEPROM Initialize and Sensor AdjustmentThis adjustment must be made after the control board unit is replaced.The EEPRO

MAINTENANCECHAPTER6

ADF MaintenanceRev. A6-16.1 OVERVIEWMaintaining of this ADF includes the following 3 items: cleaning,lubrication and adhesion. This chapter provides i

ADF MaintenanceRev. A6-26.1.1.1 Cleaning PointsPickup RollerThe pickup roller, a half-moon-shape roller with a toothed side on it, islocated in the bo

ADF MaintenanceRev. A6-3Transportation BeltWith the ADF fully open, clean the belt by turning it manually.Transportation BeltFigure 6-3. Transportatio

ADF MaintenanceRev. A6-4Paper Eject Roller2 paper eject rollers are located near the slot where document is ejected.Clean the rollers by turning them

GT-12000 Product DescriptionsRev. A1-41.3 INTERFACE SPECIFICATIONThis scanner is equipped with the following interfaces:q Bi-directional Parallel Inte

ADF MaintenanceRev. A6-5Timing SensorWith the ADF open, remove 2 screws securing the registration guide onthe left. Then clean the timing sensor.Remov

ADF MaintenanceRev. A6-6Paper Eject/Reverse SensorWith the ADF open, remove 2 screws securing the reverse guide on theright. Then clean the reverse se

ADF MaintenanceRev. A6-76.1.2 LubricationThis section gives information on where to lubricate in the ADF.WARNINGUse only the lubricant specified for t

ADF MaintenanceRev. A6-8Lubricating Point (2)Points:qqqq Sliding part for the bushing and the pulley roller holderqqqq Sliding part for the slide shaf

ADF MaintenanceRev. A6-9Lubricating Point (4)Points:Sliding parts in the leaf spring for the holding roller (Colored areas in Figure 6-13)Amount:5 mg

ADF MaintenanceRev. A6-10Lubricating Point (6)Points:Sliding parts for the belt holders and belt holding roller K-S (Colored areas in Figure 6-15)Amou

ADF MaintenanceRev. A6-11Lubricating Point (8)Points:Tension shaft surface around which the right tension roller turnsAmount:5 mgNote: Do not lubrica

ADF MaintenanceRev. A6-12Lubricating Point (10)Points:Sliding part of the reverse roller shaft(Colored area in Figure 6-19)Amount: 5 mg eachNote: Do

ADF MaintenanceRev. A6-13Lubricating Point (12)Points:qqqq Sliding parts for the flapper shaft and front and rear reverse side plates. (Colored a

ADF MaintenanceRev. A6-14Lubricating Point (14)Points: Sliding parts for the bushings (MF) and the registration pinch roller (Colored areas in Figure

GT-12000 Product DescriptionsRev. A1-51.4 CONTROL CODEThe command level for this scanner is ESC/I-B8. The commandssupported are shown in the table bel

ADF MaintenanceRev. A6-156.1.3 AdhesionThis section provides adhering points in the ADF.WARNINGUse only the adhesive specified for this ADF,since use

ADF MaintenanceRev. A6-16Adhering Point (3)q Occasion:Discharging brush installationq Amount:5 mg eachq Method:Apply lock-tight to the half of the scr

APPENDIXCHAPTER7

ADF AppendixRev. A7-17.1 CONNECTOR SUMMARYThis section describes all connectors on the control board for the ADF andtheir corresponding signals and fu

ADF AppendixRev. A7-2Table 7-4. Connector Pin Assignment (CN4)PinNo.Signal nameI/OdestinationSignallevelFunction1 FD+24VEjection coveropen/close+24VOu

ADF AppendixRev. A7-37.2 EXPLODED DIAGRAMSFigure 7-1. Exploded Diagram (1)

ADF AppendixRev. A7-4Figure 7-2. Exploded Diagram (2)

ADF AppendixRev. A7-5Figure 7-3. Exploded Diagram (3)

GT-12000 Product DescriptionsRev. A1-61.5 OPERATION SPECIFICATIONS1.5.1 Switch SpecificationThis scanner is equipped with 4 switches. Their functions

GT-12000 Product DescriptionsRev. A1-71.5.3 Switch SettingAmong the switches equipped with this scanner, SCSI switch and theterminator switch, which a

GT-12000 Product DescriptionsRev. A1-81.5.5 Readable AreaThe origin point for this scanner is marked at the rear left corner of thedocument table view

OPERATING PRINCIPLESCHAPTER2

SERVICE MANUALColor Image ScannerEPSON GT-120004008511®

GT-12000 Operating PrinciplesRev. A2-12.1 GENERAL DESCRIPTIONThe EPSON GT-12000 is mainly composed of the following units:q Scanner mechanism(Lamp/Mir

GT-12000 Operating PrinciplesRev. A2-22.2 MECHANISM OPERATING PRINCIPLESCompared with other EPSON scanners, the main feature of this scannerlies in i

GT-12000 Operating PrinciplesRev. A2-32.3 ELECTRICAL CIRCUIT OPERATIONSThis section describes the electrical circuit of the GT-12000.2.3.1 Control C

GT-12000 Operating PrinciplesRev. A2-4B054MAIN BOARDName Location DescriptionCPUHD6413003TFIC13 The CPU, which operates at 16 MHz,controls this board.

GT-12000 Operating PrinciplesRev. A2-52.3.2 Power Supply Circuit OperationSince the power supply circuit board B054PSH for this scanner meets theuniv

TROUBLESHOOTINGCHAPTER3

GT-12000 TroubleshootingRev. A3-13.1 OVERVIEWThis chapter describes the troubleshooting which enables you to solve theproblem efficiently when the sca

GT-12000 TroubleshootingRev. A3-23.1.2 TroubleshootingThis section provides test points for each major unit and check points foreach abnormal phenome

GT-12000 TroubleshootingRev. A3-3Flowchart 3-1Phenomenon: “Operate” LED does not light.Disconnect the cables from the connectors CN2/4/5/6/7 on the B

GT-12000 TroubleshootingRev. A3-4Flowchart 3-2Phenomenon: CR (Mirror/Lamp) does not move.StartWith the scanner power On, check the connector CN5 on t

NOTICEn All rights reserved. No part of this manual may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, elect

GT-12000 TroubleshootingRev. A3-5Flowchart 3-3Phenomenon: CR moves abnormally. (Crashing into the frame)StartReplace the HP sensor (for mirror).Set t

GT-12000 TroubleshootingRev. A3-6Flowchart 3-5Phenomenon: “Communication Error” (Bi-directional I/F)” (Bi-directional I/F)” (Bi-directional I/F)” (Bi

GT-12000 TroubleshootingRev. A3-7Flowchart 3-7Phenomenon: Scanned image is abnormal.StartB054MAIN board is defective.Clean the glass.NoYesClean the m

GT-12000 TroubleshootingRev. A3-83.1.3 Troubleshooting for Electrical CircuitThis section describes the abnormal phenomenon and correspondingcheck po

GT-12000 TroubleshootingRev. A3-93.1.3.2 Control Circuit Board (B054MAIN Board)Phenomenon Check Points<No operation at all>Reset IC is defectiv

GT-12000 TroubleshootingRev. A3-10Phenomenon Check Points<”Fatal Error”>Motor (for mirror) driver circuitis defective.Check the Driver IC (IC3/4

DISASSEMBLY AND ASSEMBLYCHAPTER4

GT-12000 Disassembly and AssemblyRev. A4-14.1 OVERVIEWThis chapter describes how to disassemble this scanner. Unless otherwisespecified, assembly can

GT-12000 Disassembly and AssemblyRev. A4-24.2 DISASSEMBLY PROCEDURESThis section describes disassembling and removing procedures for eachmajor unit of

GT-12000 Disassembly and AssemblyRev. A4-34.2.1 Electrical Circuit RemovalThe major electrical circuit boards (B054MAIN and B054PSH) of thisscanner a

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

GT-12000 Disassembly and AssemblyRev. A4-44.2.1.2 MAIN/B054PSH Board RemovalB054MAIN and B054PSH boards stored in the shield compartment areremoved i

GT-12000 Disassembly and AssemblyRev. A4-54.2.2 Scanner Body DisassemblyThis section describes procedures for disassembling the major units of thesca

GT-12000 Disassembly and AssemblyRev. A4-64.2.2.2 Scanner Mechanism RemovalThe scanner mechanism can be removed from the lower housing in thefollowin

GT-12000 Disassembly and AssemblyRev. A4-74.2.3 Scanner Mechanism DisassemblyThe rest part of the chapter describes the procedures for removing thema

GT-12000 Disassembly and AssemblyRev. A4-84.2.3.2 Sub Board Assembly Removal1. Remove the scanner mechanism. (See Section 4.2.2.2.)2. Turn the mech

GT-12000 Disassembly and AssemblyRev. A4-94.2.3.3 HP Sensor (CR) RemovalThis section describes procedure for removing the HP sensor whichdetects the

GT-12000 Disassembly and AssemblyRev. A4-104.2.3.4 CR Motor Assembly RemovalThis section describes procedure for removing the motor unit which drives

GT-12000 Disassembly and AssemblyRev. A4-114.2.3.5 Glass Frame Assembly Removal and Pre-operationSince the glass frame assembly is one of the reinfo

GT-12000 Disassembly and AssemblyRev. A4-123. Remove 9 screws and remove the glass frame assembly. The screwsto be removed and their locations are as

GT-12000 Disassembly and AssemblyRev. A4-134.2.3.5.1 Glass Frame Assembly InstallationAfter the glass frame assembly has been removed for any purpos

PREFACEThis manual describes basic functions, theory of electrical and mechanical operations, maintenance and repair procedures of GT-12000. The instr

GT-12000 Disassembly and AssemblyRev. A4-144.2.3.6 Lamp Assembly and Inverter Board Assembly RemovalThis section describes how to remove the lamp ass

GT-12000 Disassembly and AssemblyRev. A4-154. Disconnect the connector cable for the lamp from the connector CN2on the inverter board assembly. Then

GT-12000 Disassembly and AssemblyRev. A4-164.2.3.7 HP (AF) Sensor RemovalThis section describes the procedure for removing the HP sensor whichdetects

GT-12000 Disassembly and AssemblyRev. A4-174.2.3.8 AF Motor Assembly RemovalThis section describes how to remove the motor which drives AF drivemech

GT-12000 Disassembly and AssemblyRev. A4-184.2.3.9 AF Motor Assembly InstallationFollow the steps below when installing the AF motor assembly to thes

ADJUSTMENTCHAPTER5

GT-12000 AdjustmentRev. A5-15.1 OVERVIEWThis scanner requires no adjustment for any service such asdisassembling and assembling the scanner including

MAINTENANCECHAPTER6

GT-12000 MaintenanceRev. A6-16.1 OVERVIEWThis chapter provides information necessary to keep the scanner functionin optimum condition constantly and t

APPENDIXCHAPTER7

REVISION STATUSRev. Date Page(s) ContentsA 1997/10/20 All First release

GT-12000 AppendixRev. A7-17.1 OVERVIEWThis chapter provides information necessary for servicing.7.1.1 Connector Pin AssignmentCN3CN2 CN4 CN7CN5CN6CN1

GT-12000 AppendixRev. A7-2B054MAIN – CN4No. Signal Name FunctionA1 GND GNDA2 GND GNDA3 ADD2 Address (2)A4 ADD0 Address (0)A5 A/D AD clockA6 WR WR sign

GT-12000 AppendixRev. A7-3B054MAIN – CN5No. Signal Name Function1 +24V Power supply (for motor drive, lamp)2 +24V Power supply (for motor drive, lamp)

GT-12000 AppendixRev. A7-4B054SUB – CN2No. Signal Name Function1 +12 Power supply (+12V)2 GND GND3 +5 Power supply (+5V)4 GND GND5 +5 Power supply (+5

GT-12000 AppendixRev. A7-5B054SUB – CN6No. Signal Name Function1 HMM(S) Home sensor (Mirror) (Signal)2 GND GND3 HMM(P) Home sensor (Mirror) (Power sup

GT-12000 AppendixRev. A7-67.2 COMPONENT LAYOUTFigure 7-2. Component Layout - B054MAIN Board

GT-12000 AppendixRev. A7-7Figure 7-3. Component Layout - B054PSH Board

GT-12000 AppendixRev. A7-87.3 CIRCUIT DIAGRAMS12345678910TP5DIRECTI 3O1GND2SR378M 12R2081KR2094.7KR2101K 123Q2C4116C750.1UC770.1UQ32SJ191B16 BLM 121

GT-12000 AppendixRev. A7-9GND 1 2 3 4 5 6 7 8 9 10 11 12CN2+24VFGL51LP201-2R 5S D*1R53ZD55HZS6A-1LR594.75K 1%R8184.5KR6010KR58200KC59390P*1D5

GT-12000 AppendixRev. A7-107.4 EXPLODED DIAGRAMSFigure 7-6. Exploded Diagrams (1)

TABLE OF CONTENTSPRODUCT DESCRIPTIONS1.1 OVERVIEW...

GT-12000 AppendixRev. A7-11Figure 7-7. Exploded Diagrams (2)

SERVICE MANUALADF (Auto Document Feeder)4008512®

NOTICEn All rights reserved. No part of this manual may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, elect

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

PREFACEThis manual describes basic functions, theory of electrical and mechanical operations, maintenance and repair procedures of ADF. The instructio

REVISION STATUSRev. Date Page(s) ContentsA 1997/10/20 All First release

TABLE OF CONTENTSPRODUCT DESCRIPTIONS1.1 FEATURES...

TROUBLESHOOTING3.1 OVERVIEW...

4.2.7 Paper Feed Motor Unit Removal...

MAINTENANCE6.1 OVERVIEW...

TROUBLESHOOTING3.1 OVERVIEW...

PRODUCT DESCRIPTIONSCHAPTER1

ADF Product DescriptionRev. A1-11.1 FEATURESThis auto document feeder (ADF) is the exclusive ADF for GT-12000, andits main features are as follows:q

ADF Product DescriptionRev. A1-2Accuracy in top position: Single feed: 0 - +2 mmDuplex feed: 0 - +2 mmCenter alignment: Single feed: +1.5 mmDuplex f

ADF Product DescriptionRev. A1-3ELECTRICAL SPECIFICATIONPower supply: Supplied through the scanner- DC24V ± 10%- DC5V ± 10%Consumption current: DC24V

ADF Product DescriptionRev. A1-4APPEARANCEWeight: 16Kg or lessDimensions (W x D x H): 601 x 529 x 122 mm / 23.6 x 20.8 x 4.8 inch(with the extension

OPERATING PRINCIPLESCHAPTER2

ADF Operating PrinciplesRev. A2-12.1 OVERVIEWThis chapter gives information on operating principles of the ADF whichcan be used with the EPSON scanne

ADF Operating PrinciplesRev. A2-2SINGLE FEEDINGIn single feeding mode, the ADF loads document from the paper feed trayand transports it to the scanni

ADF Operating PrinciplesRev. A2-35. The document is transported until the rear edge passed thedocument stopper, then the transportation motor stops

ADF Operating PrinciplesRev. A2-49. After scanned, the scanned document is ejected according to thesingle feed command from the scanner and the pre-

4.2.3.5 Glass Frame Assembly Removal and Pre-operation ...

ADF Operating PrinciplesRev. A2-513. While scanning, the document is ejected to the output tray. Rotationalspeed of the paper eject/reverse motor is

ADF Operating PrinciplesRev. A2-6REVERSE FEEDINGIn the reverse feeding mode, document is fed in the following order:The document is fed. ® The docume

ADF Operating PrinciplesRev. A2-75. When the paper eject/reverse sensor comes on, the transportationmotor stops and then the paper eject/reverse mot

ADF Operating PrinciplesRev. A2-89. According to the reverse feeding command, the transportation motorand the paper eject/reverse motor rotate forwa

ADF Operating PrinciplesRev. A2-913. The transportation motor rotates forward and then the paper feedmotor rotates backward to transport the pre-fed

ADF Operating PrinciplesRev. A2-1017. The transportation motor rotates backward and then the papereject/reverse motor rotates forward to transport t

ADF Operating PrinciplesRev. A2-1121. According to the ejection command from the scanner, the scannerstarts ejecting the scanned document. The trans

ADF Operating PrinciplesRev. A2-122.1.2 Electrical CircuitThis ADF (R-4C1070).is equipped with only one control board. Thissection describes the func

ADF Operating PrinciplesRev. A2-132.1.2.2 Paper Size Detection CircuitThe edge guides in the paper feed tray of this ADF are used to detect thepaper

ADF Operating PrinciplesRev. A2-142.1.2.4 Paper Feeding Motor Encoder Sensor CircuitThe paper feeding motor is used to manage the following operatio