Canon SmartBase 1270D, Руководство по обслуживанию

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COPYRIGHT © 2002 CANON INC. 2000 2000 2000 2000 CANON SmartBase PC1210D/1230D/1270D REV. 1 MAR. 2002
CHAPTER 7 TROUBLESHOOTING
7-34
3.1.19 The output is blank.
General conditions
1) Execute ‘PRINT test’. Is the output image normal? (See 3.21.5 of
Chapter 2.)
YES: Go through steps 11) to 14).
NO:
Go to step 2).
General condition
2) Turn off the power while an image is being printed on the photo-
sensitive drum. Is the toner image developed on the drum surface?
YES: Go through steps 8) to 10).
NO:
Go through steps 3) to 7).
High-voltage contact (between cartridge and high-voltage spring)
3) Is the high-voltage spring used to supply high voltage to the car-
tridge soiled? (Remove the cartridge to check.)
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-
tors (J205, J207) on the DC controller normal?
NO: Correct it. If the problem cannot be corrected, replace the faulty
part.
Connectors
5) Is the connection of the following connectors on the DC controller
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?
NO: Connect them firmly. If the flexible cable has a scratch, replace it.
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:
Replace the DC controller PCB.
Transfer guide
8) Measure the transfer guide and other metal areas. Is the resistance
0
Ω. Ω.
Ω. Ω. Ω.
YES: Check the area around the transfer guide for pieces of metal (e.g.,
screw).
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-
fer charging roller soiled?
YES: Clean it.