The Output Is Blank - Canon SmartBase PC1200s Service Manual

CHAPTER 7 TROUBLESHOOTING

3.1.19 The output is blank.

General conditions
1) Execute 'PRINT test'. Is the output image normal? (See 3.21.5 of
YES: Go through steps 11) to 14).
NO:
General condition
2) Turn off the power while an image is being printed on the photo-
YES: Go through steps 8) to 10).
NO:
High-voltage contact (between cartridge and high-voltage spring)
3) Is the high-voltage spring used to supply high voltage to the car-
YES: Clean it.
High-voltage contact (between high-voltage spring and DC controller PCB; J205, J207)
4) Is the connection between the high-voltage spring and the connec-
NO:
Connectors
5) Is the connection of the following connectors on the DC controller
NO:
Cartridge
6) Try replacing the cartridge. Is the problem corrected?
YES: End.
Laser scanner unit, DC controller PCB
7) Try replacing the laser scanner unit. Is the problem corrected?
YES: End.
NO:
Transfer guide
8) Measure the transfer guide and other metal areas. Is the resistance
YES: Check the area around the transfer guide for pieces of metal (e.g.,
High-voltage contact (between transfer charging roller and high-voltage spring)
9) Is the high-voltage spring used to supply high voltage to the trans-
YES: Clean it.
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COPYRIGHT © 2001 CANON INC.
Chapter 2.)
Go to step 2).
sensitive drum. Is the toner image developed on the drum surface?
Go through steps 3) to 7).
tridge soiled? (Remove the cartridge to check.)
tors (J205, J207) on the DC controller normal?
Correct it. If the problem cannot be corrected, replace the faulty
part.
PCB normal: J201 and J204 on the DC controller PCB; J303, J304,
J312, and J316 on the image processor PCB; J3122, and J801 of the
laser scanner unit?
Connect them firmly. If the flexible cable has a scratch, replace it.
Replace the DC controller PCB.
0 Ω. Ω. Ω. Ω. Ω.
screw).
fer charging roller soiled?
2000 2000 2000 2000 CANON SmartBase PC1200s/iR1200s REV. 0 DEC. 2001