The Copy Is Solid Black - Canon NP6330 Service Manual

CHAPTER 11 TROUBLESHOOTING
22

The copy is solid black.

Step
Cause
1
2
3
High-voltage
power supply
PCB
11-72
COPYRIGHT © 1997 CANON INC.
Download Service Manual And Resetter Printer at http://printer1.blogspot.com
Checks
Is the scanning lamp on during
copying operation?
Is the pre-exposure lamp on
during copying?
Replace the high-voltage power
supply PCB. Is the problem
corrected?
YES/NO
NO
NO
YES
NO
CANON NP6330 REV.0 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
Action
See "The scanning lamp
fails to turn on."
See "The pre-exposure
lamp fails to turn on."
End.
Replace the drum unit.