The Print Is Foggy (Overall) - Canon iR5000 Service Manual

CHAPTER 4 TROUBLESHOOTING IMAGE FAULTS/MALFUNCTIONS

3.6 The print is foggy (overall)

Potential control system
1) Set '0' to the following in service mode to turn off potential control:
COPIER>OPTION>BODY>PC-CNT> Is the problem corrected?
YES: The cause is in the potential control mechanisms. Make checks ac-
Photosensitive drum cleaner unit
2) Is the cleaning blade mounted correctly?
NO:
Pre-exposure lamp/DC controller PCB
3) Is the pre-exposure lamp on during printing?
NO:
1.
2.
Developing assembly
4) Are the developing rolls worn?
YES: Replace the developing rolls.
Photosensitive drum
5) Is the photosensitive drum soiled?
YES: Clean the photosensitive drum.
NO:
4-8 T
cording to the instructions for the potential control mechanism in
Chapter 3 "Standards and Adjustments."
Mount the cleaning blade correctly.
Replace the pre-exposure lamp.
Replace the DC controller PCB.
Replace the photosensitive drum.
CANON iR5000/iR6000 REV.0 JULY 2000 2000 2000 2000 2000COPYRIGHT © 2000 CANON INC.