Troubleshooting Image Faults - Canon GP605 Service Manual

C.

Troubleshooting Image Faults

1 The copy is too light (halftone area).
Cause Step
Scanner (dirt)
AE adjustment
Developing
assembly
COPYRIGHT © 1999 CANON INC.
1 Perform the Image Adjustment Basic
Procedure. Is the problem corrected?
2 Does the problem occur on copy images
only?
3 Make copies in AE mode. Is the density
correct?
4 Are the rolls of the developing assembly
in contact with the drum?
CANON GP605/605V REV.0 JAN. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 13 TROUBLESHOOTING
Checks Yes/No Action
YES End.
YES The cause is between
the scanner and the
CCD:
1. Check the standard
white plate for dirt.
2. Execute
COPIER>FUNCTION>
CCD>CCD-ADJ in
service mode.
YES End.
NO Check to see if the
developing assembly
pressure plate to see if
it is mounted properly.
Is the toner on the
YES developing cylinder in
an even coating?
13-67