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COPYRIGHT
©
1999 CANON INC. CANON imageRUNNER 600 REV.1 JAN. 2000 PRINTED IN U.S.A.
13-79
CHAPTER 13 TROUBLESHOOTING
19 The copy is foggy (horizontal).
20 The copy has poor sharpness.
Checks
Does the problem occur at the same
position on all copies made in Direct?
Does the scanning lamp flicker while the
scanner is moving forward?
Make reduced copies, and compare them
against copies made in Direct. Are the
positions of the problem different?
Step
1
2
3
Yes/No
YES
YES
NO
YES
Cause
Scanning lamp,
Lamp regulator
Scanner
Feeding system
Action
Go to step 3.
Check the scanning
lamp and the lamp
regulator.
Check the scanner
system.
Check the feeding
system.
Cause
Copyboard glass
Mirror position
Scanner (dirt)
Photosensitive
drum
Lens drive
assembly
Step
1
2
3
4
Action
Clean the copyboard
glass.
Adjust the distance
between No. 1 mirror
and the No. 2 mirror.
End.
End.
Check the operation of
the lens drive assembly.
Checks
Is the copyboard glass soiled with oil?
Is the horizontal reproduction ratio in
Direct within the specified range?
Clean the scanning lamp, reflecting plate,
mirror, lens, and dust-proofing glass. Is
the problem corrected?
Replace the photosensitive drum. Is the
problem corrected?
Yes/No
YES
NO
YES
YES
NO