The Output Is Too Light - Canon imageCLASS D600s Service Manual

CHAPTER 7 TROUBLESHOOTING
3.1.1

The output is too light.

Image density
1) Is the image density setting correct?
NO:
Paper
2) Try paper fresh out of package (newly opened). Is the problem cor-
rected?
YES: 1. The paper may be moist. Advise the user on the correct method
General conditions
3) Execute 'PRINT test'. Is the output image normal? (See 3.19.5
"PRINT TEST" in Chapter 2.)
YES: Go through steps 14) to 18).
NO:
General conditions
4) Turn off the machine while an image is printing on the photosensi-
tive drum. Is the toner on the drum surface developed?
YES: Go through steps 11) to 13).
NO:
Cartridge
5) Take out the cartridge, and rock it lightly 5 to 6 times. Is the prob-
lem corrected?
YES: End.
High-voltage contact (between cartridge and high-voltage spring)
6) 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)
7) Is the connection between the high-voltage spring and the DC con-
troller PCB (J205, J207) normal?
NO:
Connector
8) Is the connection of the following connectors normal: J210 and
J204 on the DC controller PCB; J303, J304, J312, and J316 on the
image processor PCB; J322 and J801 in the laser scanner unit?
NO:
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COPYRIGHT © 2001 CANON INC.
Chapter7B.p65
Correct the image density setting.
of storing paper.
2. Advise the user that the use of non-recommended paper may
not bring about the best results.
Go to step 4.
Go through steps 5) to 10).
Correct it. If it cannot be corrected, replace the faulty part.
Connect them firmly. If a scratch is found in the flexible cable, re-
place it.
CANON imageCLASS D600s/PC1060s/PC1200s/iR1200s REV. 0 SEPT. 2001
20 8/26/01, 3:48 PM