Toshiba e-STUDIO 163 - General Precautions for Service

e-STUDIO163/203 CONTENTS © July 2006 TOSHIBA TEC
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6.5 Contact Image Sensor Unit Control Circuit..........................................................................6-8
6.5.1 Exposure LED control circuit....................................................................................6-8
6.5.2 CCD control circuit ...................................................................................................6-9
6.6 Disassembly and Replacement .........................................................................................6-12
7. IMAGE PROCESSING..................................................................................................7-1
7.1 General Description.............................................................................................................7-1
7.2 Configuration .......................................................................................................................7-2
7.3 MAIN Board .........................................................................................................................7-3
7.3.1 Features ...................................................................................................................7-3
7.3.2 Functions of image processing circuit ......................................................................7-4
8. LASER OPTICAL UNIT ................................................................................................8-1
8.1 General Description.............................................................................................................8-1
8.2 Structure ..............................................................................................................................8-2
8.3 Laser Diode Control Circuit..................................................................................................8-5
8.4 Polygonal Motor Control Circuit...........................................................................................8-6
8.5 Disassembly and Replacement ...........................................................................................8-7
9. DRIVE UNIT ..................................................................................................................9-1
9.1 General Description.............................................................................................................9-1
9.2 Configuration .......................................................................................................................9-2
9.3 Functions ............................................................................................................................9-3
9.4 Main Motor Control Circuit...................................................................................................9-4
9.5 Disassembly and Replacement ...........................................................................................9-6
10. PAPER FEEDING SYSTEM........................................................................................10-1
10.1 General Description...........................................................................................................10-1
10.2 Configuration .....................................................................................................................10-2
10.3 Functions...........................................................................................................................10-3
10.4 Operation...........................................................................................................................10-5
10.4.1 Drawer....................................................................................................................10-5
10.4.2 Bypass tray............................................................................................................. 10-7
10.4.3 General operation...................................................................................................10-9
10.5 Disassembly and Replacement .......................................................................................10-10
11. DRUM RELATED SECTION.......................................................................................11-1
11.1 General Description...........................................................................................................11-1
11.2 Configuration .....................................................................................................................11-2
11.3 Functions...........................................................................................................................11-3
11.4 High-Voltage Output Control Circuit .................................................................................. 11-5
11.4.1 General description ................................................................................................11-5
11.4.2 Description of Operation.........................................................................................11-6
11.5 Drum Temperature Detection Circuit.................................................................................11-7
11.5.1 General description ................................................................................................11-7
11.5.2 Circuit configuration................................................................................................11-7
11.6 Temperature/Humidity Detection Circuit............................................................................11-8
11.6.1 General Description................................................................................................11-8
11.6.2 Circuit configuration................................................................................................11-8
11.7 Disassembly and Replacement .........................................................................................11-9
12. DEVELOPMENT SYSTEM..........................................................................................12-1
12.1 General Description...........................................................................................................12-1
12.2 Construction.......................................................................................................................12-2
12.3 Functions...........................................................................................................................12-3
12.3.1 Function of each unit .............................................................................................. 12-3
12.3.2 Functions of the toner cartridge PC board (CTRG)................................................12-4
12.3.3 Recovered toner supply mechanism ...................................................................... 12-6