Toshiba e-STUDIO520 Service Manual page 9
Multifunctional digital systems
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Also See for e-STUDIO520:
- Service handbook (650 pages) ,
- User functions manual (202 pages) ,
- Network administration manual (124 pages)
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10.3.2 Configuration .......................................................................................................... 10-3
10.4 High-voltage Transformer Control Circuit .......................................................................... 10-4
10.4.1 General description ................................................................................................ 10-4
10.4.2 Description of operation ......................................................................................... 10-5
10.5 Drum Surface Potential Sensor Control Circuit ................................................................. 10-6
10.5.1 General description ................................................................................................ 10-6
10.5.2 Configuration .......................................................................................................... 10-6
10.5.3 Description of operation ......................................................................................... 10-7
10.6 Temperature/humidity detection circuit.............................................................................. 10-8
10.6.1 Outline .................................................................................................................... 10-8
10.6.2 Construction ........................................................................................................... 10-8
10.7 Disassembly and Replacement ......................................................................................... 10-9
11. DRUM/CLEANER UNIT .............................................................................................. 11-1
11.1 Construction....................................................................................................................... 11-1
11.2 Functions ........................................................................................................................... 11-2
11.3 Drum Temperature Detection Circuit ................................................................................. 11-3
11.4 Image Quality Control ........................................................................................................ 11-4
11.4.1 Outline .................................................................................................................... 11-4
11.4.2 Construction ........................................................................................................... 11-4
11.4.3 Principle of Image Quality Sensor .......................................................................... 11-5
11.4.4 Flow of control ........................................................................................................ 11-5
11.5 Drum motor control circuit.................................................................................................. 11-6
11.6 Disassembly and Replacement ......................................................................................... 11-7
12. DEVELOPER UNIT ..................................................................................................... 12-1
12.1 Construction....................................................................................................................... 12-1
12.2 Functions ........................................................................................................................... 12-2
12.3 Developer Unit Drive.......................................................................................................... 12-7
12.4 Motor Control Circuit.......................................................................................................... 12-8
12.4.1 New toner supply motor control circuit ................................................................... 12-8
12.4.2 Developer unit motor control circuit ........................................................................ 12-9
12.5 Auto-toner Circuit............................................................................................................. 12-11
12.5.1 General description .............................................................................................. 12-11
12.5.2 Operation of auto-toner sensor ............................................................................ 12-13
12.6 Disassembly and Replacement ....................................................................................... 12-15
13. TRANSFER/TRANSPORT UNIT ................................................................................ 13-1
13.1 General Description ........................................................................................................... 13-1
13.2 Functions ........................................................................................................................... 13-2
13.3 General Description of Transfer Belt Unit Operation ......................................................... 13-4
13.4 Transfer belt motor control circuit ...................................................................................... 13-5
13.5 Disassembly and Replacement ......................................................................................... 13-6
14. FUSER UNIT ............................................................................................................... 14-1
14.1 Outline ............................................................................................................................... 14-1
14.2 Operation ........................................................................................................................... 14-2
14.3 Functions ........................................................................................................................... 14-3
14.4 Fuser Control Circuit.......................................................................................................... 14-5
14.4.1 Configuration .......................................................................................................... 14-5
14.4.2 Heating principle of IH coil...................................................................................... 14-6
14.4.3 IH control circuit interface ....................................................................................... 14-7
14.4.4 Abnormality in the IH control circuit ........................................................................ 14-7
14.4.5 Temperature detection section ............................................................................... 14-9
14.5 Fuser Motor Control Circuit.............................................................................................. 14-15
14.6 Disassembly and Replacement ....................................................................................... 14-17
March 2005 © TOSHIBA TEC
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e-STUDIO520/600/720/850 CONTENTS
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