The Copy Is Foggy (Horizontal); The Copy Has Poor Sharpness - Canon GP605 Service Manual

19

The copy is foggy (horizontal).

Cause Step
Scanning lamp,
Lamp regulator
Scanner
Feeding system
20

The copy has poor sharpness.

Cause Step
Copyboard glass
Mirror position
Scanner (dirt)
Photosensitive
drum
Lens drive
assembly
COPYRIGHT © 1999 CANON INC.
1 Does the problem occur at the same
position on all copies made in Direct?
2 Does the scanning lamp flicker while the
scanner is moving forward?
3 Make reduced copies, and compare them
against copies made in Direct. Are the
positions of the problem different?
1 Is the copyboard glass soiled with oil?
2 Is the horizontal reproduction ratio in
Direct within the specified range?
3 Clean the scanning lamp, reflecting plate,
mirror, lens, and dust-proofing glass. Is
the problem corrected?
4 Replace the photosensitive drum. Is the
problem corrected?
CANON GP605/605V REV.0 JAN. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 13 TROUBLESHOOTING
Checks
Checks
Yes/No Action
YES Go to step 3.
YES Check the scanning
lamp and the lamp
regulator.
NO Check the scanner
system.
YES Check the feeding
system.
Yes/No Action
YES Clean the copyboard
glass.
NO Adjust the distance
between No. 1 mirror
and the No. 2 mirror.
YES End.
YES End.
NO Check the operation of
the lens drive assembly.
13-79