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EPSON EPL-C8000
Rev. B
Chapter 2
OPERATING PRINCIPLES
2-61
2.7.8.2 Second Transfer (Belt
→
Paper)
Transferring the toner image on the belt onto the paper is called 2nd
Transfer. 2nd transfer is done when the HVPS outputs the power to the
Contact Roll.
1. 2nd Transfer Current
The resistance of the 2nd BTR and Back Up Roll changes due to
time and environment. To obtain a stable transfer, it is necessary to
adjust the resistance by adjusting the transfer current. The following
is a flowchart showing how 2nd transfer current is determined.
NOTE: If the output current is not valid, including the case that the 2nd
BTR does not perform advance/retract control because of the
2nd BTR malfunction, it causes the 2nd BTR bad resistance and
a service call error is indicated on the LCD panel.
Figure 2-48. Second Transfer Current Flow
C a l c u l a t e t h e 2 n d t r a n s f e r v o l t a g e a c c o r d i n g t o t h e o u t p u t c u r r e n t
m o n i t o r e d .
N o t e : T h e 2 n d t r a n s f e r v o l t a g e d i f f e r s d e p e n d i n g o n t h e c o l o r m o d e ,
s p e e d m o d e a n d p a p e r t y p e .
A d v a n c e t h e 2 n d B T R A s s e m b l y a n d t h e B e l t C l e a n e r A s s e m b l y
O u t p u t t h e p r e d e t e r m i n e d v o l t a g e t o t h e C o n t a c t R o l l t o m o n i t o r t h e
2 n d t r a n s f e r r e s i s t a n c e .
M o n i t o r t h e o u t p u t c u r r e n t o b t a i n e d f o r m t h e p r e d e t e r m i n e d v o l t a g e
( a s a s u b s t i t u t e f o r t h e r e s i s t a n c e v a l u e ) .
A d j u s t t h e 2 n d t r a n s f e r c u r r e n t a c c o r d i n g t o t h e 1 s t t r a n s f e r v o l t a g e .
D e t e r m i n e t h e 2 n d t r a n s f e r v o l t a g e t o b e u s e d f o r p r i n t i n g .
R e t r a c t t h e 2 n d B T R A s s e m b l y a n d t h e B e l t C l e a n e r A s s e m b l y .
Содержание ColorPage EPL-C8000
Страница 1: ...EPSONColorPageEPL C8000 Color Laser Printer 4009762 SERVICE MANUAL ...
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Страница 15: ...C H A P T E R 1 PRODUCTDESCRIPTIONS ...
Страница 59: ...C H A P T E R 2 OPERATINGPRINCIPLES ...
Страница 80: ...EPSON EPL C8000 Rev B Chapter 2 OPERATING PRINCIPLES 2 19 2 3 5 Gear Layout Figure 2 23 Gear Layout ...
Страница 88: ...EPSON EPL C8000 Rev B Chapter 2 OPERATING PRINCIPLES 2 27 Figure 2 29 Paper Transportation ...
Страница 91: ...EPSON EPL C8000 Rev B Chapter 2 OPERATING PRINCIPLES 2 30 Figure 2 31 Xerographics II ...
Страница 93: ...EPSON EPL C8000 Rev B Chapter 2 OPERATING PRINCIPLES 2 32 Figure 2 32 Development ...
Страница 97: ...EPSON EPL C8000 Rev B Chapter 2 OPERATING PRINCIPLES 2 36 Figure 2 35 Fusing I ...
Страница 99: ...EPSON EPL C8000 Rev B Chapter 2 OPERATING PRINCIPLES 2 38 Figure 2 36 Fusing II ...
Страница 102: ...EPSON EPL C8000 Rev B Chapter 2 OPERATING PRINCIPLES 2 41 Figure 2 38 Drives ...
Страница 104: ...EPSON EPL C8000 Rev B Chapter 2 OPERATING PRINCIPLES 2 43 Figure 2 39 Electrical ...
Страница 138: ...EPSON EPL C8000 Rev B Chapter 2 OPERATING PRINCIPLES 2 77 Figure 2 54 C235MAIN Board Circuit Diagrams 2 5 6 ...
Страница 140: ...C H A P T E R 3 DISASSEMBLYANDASSEMBLY ADJUSTMENT ...
Страница 269: ...C H A P T E R 4 DIAGNOSTICS ...
Страница 332: ...C H A P T E R 5 TROUBLESHOOTING ...
Страница 452: ...C H A P T E R 6 MAINTENANCE ...
Страница 471: ... APPENDIX ...
Страница 479: ...EPSON EPL C8000 Rev B Chapter A APPENDIX A 7 Figure A 2 PL2 1 Paper Tray I Figure A 3 PL2 2 Paper Tray II ...
Страница 480: ...EPSON EPL C8000 Rev B Chapter A APPENDIX A 8 Figure A 4 PL3 1 Paper Feeder Figure A 5 PL4 1 Multi Sheet Insert I ...
Страница 483: ...EPSON EPL C8000 Rev B Chapter A APPENDIX A 11 Figure A 10 PL6 1 Xerographics Figure A 11 PL7 1 Development I ...
Страница 484: ...EPSON EPL C8000 Rev B Chapter A APPENDIX A 12 Figure A 12 PL7 2 Development II Figure A 13 PL8 1 IBT I ...
Страница 485: ...EPSON EPL C8000 Rev B Chapter A APPENDIX A 13 Figure A 14 PL8 2 IBT II Figure A 15 PL8 3 IBT III ...
Страница 486: ...EPSON EPL C8000 Rev B Chapter A APPENDIX A 14 Figure A 16 PL8 4 IBT IV Figure A 17 PL9 1 Fusing I ...
Страница 487: ...EPSON EPL C8000 Rev B Chapter A APPENDIX A 15 Figure A 18 PL9 2 Fusing II Figure A 19 PL9 3 Fusing III ...
Страница 488: ...EPSON EPL C8000 Rev B Chapter A APPENDIX A 16 Figure A 20 PL9 4 Fusing IV Figure A 21 PL10 1 Paper Exit I ...
Страница 489: ...EPSON EPL C8000 Rev B Chapter A APPENDIX A 17 Figure A 22 PL10 2 Paper Exit II Figure A 23 PL11 1 Drive ...
Страница 490: ...EPSON EPL C8000 Rev B Chapter A APPENDIX A 18 Figure A 24 PL12 1 Frame Figure A 25 PL 13 1 Electrical I ...
Страница 491: ...EPSON EPL C8000 Rev B Chapter A APPENDIX A 19 Figure A 26 PL13 2 Electrical II Figure A 27 PL14 1 Controller ...
Страница 493: ...EPSON EPL C8000 Rev B Chapter A APPENDIX A 21 Figure A 29 P J Location 2 Figure A 30 P J Location 3 ...
Страница 494: ...EPSON EPL C8000 Rev B Chapter A APPENDIX A 22 Figure A 31 P J Location 4 Figure A 32 P J Location 5 ...
Страница 495: ...EPSON EPL C8000 Rev B Chapter A APPENDIX A 23 Figure A 33 P J Location 6 Figure A 34 P J Location 7 ...
Страница 501: ...EPSON EPL C8000 Rev B Chapter A APPENDIX A 29 Figure 1 36 Master Wiring Diagram ...
Страница 506: ...EPSON EPL C8000 Rev B Chapter A APPENDIX A 34 Figure 1 37 Wiring Diagram 1 ...
Страница 508: ...EPSON EPL C8000 Rev B Chapter A APPENDIX A 36 Figure 1 38 Wiring Diagram 2 ...
Страница 510: ...EPSON EPL C8000 Rev B Chapter A APPENDIX A 38 Figure 1 39 Wiring Diagram 3 ...
Страница 512: ...EPSON EPL C8000 Rev B Chapter A APPENDIX A 40 Figure 1 40 Wiring Diagram 4 ...
Страница 514: ...EPSON EPL C8000 Rev B Chapter A APPENDIX A 42 Figure 1 41 Wiring Diagram 5 ...
Страница 516: ...EPSON EPL C8000 Rev B Chapter A APPENDIX A 44 Figure 1 42 Wiring Diagram 6 ...
Страница 518: ...EPSON EPL C8000 Rev B Chapter A APPENDIX A 46 Figure 1 43 Wiring Diagram 7 ...
Страница 520: ...EPSON EPL C8000 Rev B Chapter A APPENDIX A 48 Figure 1 44 Wiring Diagram 8 ...
Страница 522: ...EPSON EPL C8000 Rev B Chapter A APPENDIX A 50 Figure 1 45 Wiring Diagram 9 ...
Страница 524: ...EPSON EPL C8000 Rev B Chapter A APPENDIX A 52 Figure 1 46 Wiring Diagram 10 ...
Страница 526: ...EPSON EPL C8000 Rev B Chapter A APPENDIX A 54 Figure 1 47 Wiring Diagram 11 ...
Страница 528: ...EPSON EPL C8000 Rev B Chapter A APPENDIX A 56 Figure 1 48 Wiring Diagram 12 ...
Страница 530: ...EPSON EPL C8000 Rev B Chapter A APPENDIX A 58 Figure 1 49 Wiring Diagram 13 ...
Страница 531: ...EPSON EPL C8000 Rev B Chapter A APPENDIX A 59 A 4 Component Layout Figure 1 50 C235MAIN 1 ...
Страница 532: ...EPSON EPL C8000 Rev B Chapter A APPENDIX A 60 Figure 1 51 C235MAIN 2 ...
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Страница 544: ...EPSON EPL C8000 Rev B Chapter A APPENDIX A 72 Figure A 54 PL22 1 Feeder 3 Figure A 55 PL22 2 Feeder 4 ...
Страница 545: ...EPSON EPL C8000 Rev B Chapter A APPENDIX A 73 A 6 5 Wiring Diagrams Figure 1 56 Master Wiring Diagram ...