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COPYRIGHT © 2001 CANON INC. CANON CLC1000/1000S/3100 REV.2 MAY 2001 PRINTED IN JAPAN (IMPRIME AU JAPON)
7. TROUBLESHOOTING IMAGE FAULTS/MALFUNCTIONS
D. Troubleshooting Image Faults
1
2
3
4
5
6
Too light (all colors)
Too light (specific color)
Uneven density (vertical)
Uneven density (horizontal)
Fogging
Vertical lines/ horizontal lines
7
8
9
10
11
12
White lines/white lines (vertical)
Horizontal lines/horizontal fogging
White spots (horizontal)
White spots
White spots (trailing center)
White spots (wavy lines)
13
14
15
16
17
18
Soiled image/soiled back
Fixing fault
Toner smear (fixing)
Blank
Solid black
Color displacement
1
The image is too light
(all colors).
2
The image is too light
(specific color).
Cont'd
Cause
Moire
Scanner
Step
1
2
3
4
5
6
Checks
Clean the primary charging assem-
bly, dust-proofing glass, reflecting
mirror, and lens. Is the problem
corrected?
Is the output image of the halftone
test print (PGTYPE=5) normal?
Is the image uneven because of
moire*?
* Pattern interference that can occur
when copying originals printed in
dots.
Clean the standard white plate,
scanning lamp, and reflecting lamp
cover. Is the problem corrected?
Is there a gap under the standard
white plate or the copyboard glass?
Is the scanning lamp blackened?
Yes/No
YES
NO
YES
YES
YES
YES
Action
End.
Go to step 9.
Decrease ‘Photo Sharp-
ness’, and store the
setting in standard mode.
• If excessively
decreased, copies of
photos will have little
contrast.
End.
Install them so that the
part will be in even
contact.
Replace it.
Perform the Image Adjustment Basic Procedure.
3
The copy has uneven density
(vertical).
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