Troubleshooting Image Faults; The Image Is Too Light (All Colors); The Image Is Too Light (Specific Color); The Copy Has Uneven Density (Vertical) - Canon CLC5000 Service Manual

3.4 Troubleshooting Image Faults

1 Too light (all colors)
2 Too light (specific color)
3 Uneven density (vertical)
4 Uneven density (horizontal)
5 Fogging
6 Vertical lines/ horizontal lines 12 White spots (wavy lines)

3.4.1 The image is too light (all colors).

Perform the Image Adjustment Basic Procedure.

3.4.2 The image is too light (specific color).

Perform the Image Adjustment Basic Procedure.

3.4.3 The copy has uneven density (vertical).

1) Clean the primary charging assembly, dust-proofing glass, reflect-
YES: End.
2) Is the output image of the halftone test print (PGTYPE=5) normal?
NO:
Moire
3) Is the image uneven because of moire*?
YES: Decrease 'Photo Sharpness', and store the setting in standard
Scanner
4) Clean the standard white plate, scanning lamp, and reflecting lamp
YES: End.
5) Is there a gap under the standard white plate or the copyboard
YES: Install them so that the part will be in even contact.
6) Is the scanning lamp blackened?
YES: Replace it.
COPYRIGHT © 2001 CANON INC.
CHAPTER 5 TROUBLESHOOTING IMAGE FAULTS/MALFUNCTIONS
7 White lines/white lines (vertical) 13 Soiled image/soiled back
8 Horizontal lines/horizontal fogging 14 Fixing fault
9 White spots (horizontal)
10 White spots
11 White spots (trailing center)
ing mirror, and lens. Is the problem corrected?
Go to step 12.
* Pattern interference that can occur when copying originals
printed in dots.
mode.
• If excessively decreased, copies of photos will have little contrast.
cover. Is the problem corrected?
glass?
2000 2000 2000 2000 CANON CLC5000 REV.0 JAN 2001
15 Toner smear (fixing)
16 Blank
17 Solid black
18 Color displacement
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