The Output Is Solid Black - Canon SmartBase PC1200s Service Manual

CHAPTER 7 TROUBLESHOOTING

3.1.20 The output is solid black.

General conditions
1) Execute 'PRINT test'. Is the output image normal? (See 3.21.5 of
YES: Go through steps 5) to 8).
NO:
High voltage contact (between primary charging roller and high-voltage spring)
2) Is the high-voltage spring used to supply power to the cartridge
YES: Clean it.
High-voltage contact (high-voltage spring and DC controller PCB; J205)
3) Is the connection between the high-voltage spring and the DC con-
NO:
Cartridge, DC controller PCB
4) Try replacing the cartridge. Is the problem corrected?
YES: End.
NO:
Contact sensor LED intensity auto adjustment adjustment
5) Execute contact sensor LED intensity auto adjustment adjustment.
YES: End.
Connector
6) Is the connection of the following controller normal: J501 and J503
NO:
Contact sensor
7) Try replacing the contact sensor. Is the problem corrected?
YES: End.
Analog processor PCB, Image processor PCB
8) Try replacing the analog processor PCB. Is the problem corrected?
YES: End.
NO:
7-36
COPYRIGHT © 2001 CANON INC.
Chapter 2.)
Go through steps 2) to 4).
soiled? (Remove the cartridge to check.)
troller PCB (J205) normal?
Correct it. If the problem cannot be corrected, replace the faulty part.
Replace the DC controller PCB.
Is the problem corrected? (See 1.2.4.1 of Chapter 7.)
on the analog processor PCB; J317 on the image processor PCB;
J504 of the contact sensor?
Connect them firmly. If the flexible cable has a scratch, replace it.
Replace the image processor PCB.
2000 2000 2000 2000 CANON SmartBase PC1200s/iR1200s REV. 0 DEC. 2001