Technical information

COPYRIGHT © 2001 CANON INC. 2000 2000 2000 2000 CANON CLC5000 REV.0 JAN 2001
CHAPTER 5 TROUBLESHOOTING IMAGE FAULTS/MALFUNCTIONS
5-81
3.4 Troubleshooting Image Faults
1 Too light (all colors) 7 White lines/white lines (vertical) 13 Soiled image/soiled back
2 Too light (specific color) 8 Horizontal lines/horizontal fogging 14 Fixing fault
3 Uneven density (vertical) 9 White spots (horizontal) 15 Toner smear (fixing)
4 Uneven density (horizontal) 10 White spots 16 Blank
5 Fogging 11 White spots (trailing center) 17 Solid black
6 Vertical lines/ horizontal lines 12 White spots (wavy lines) 18 Color displacement
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-
ing mirror, and lens. Is the problem corrected?
YES: End.
2) Is the output image of the halftone test print (PGTYPE=5) normal?
NO: Go to step 12.
Moire
3) Is the image uneven because of moire*?
* Pattern interference that can occur when copying originals
printed in dots.
YES: Decrease ‘Photo Sharpness’, and store the setting in standard
mode.
• If excessively decreased, copies of photos will have little contrast.
Scanner
4) Clean the standard white plate, scanning lamp, and reflecting lamp
cover. Is the problem corrected?
YES: End.
5) Is there a gap under the standard white plate or the copyboard
glass?
YES: Install them so that the part will be in even contact.
6) Is the scanning lamp blackened?
YES: Replace it.