Technical information

COPYRIGHT © 2001 CANON INC. 2000 2000 2000 2000 CANON CLC5000 REV.0 JAN. 2001
CHAPTER 5 TROUBLESHOOTING IMAGE FAULTS/MALFUNCTIONS
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3.4.5 The copy has fogging.
Perform the Image Adjustment Basic Procedure.
If fogging occurs in K at the 100th to 5000th copy after the replacement of developer in a
low humidity environment, perform any of the following:
1. Decrease the setting of the following: ‘ADJUST>ADJ-MISC>K-DOFST’
Make five copies of the Test Print (type 5, DENS-K=255, COLOR-K=1, COLOR-Y/M/
C=0; copy count=1).
Then, check to make sure that the setting of PASCAL is ‘1’, and execute auto gradation
correction.
2. Check the following: ‘DISPLAY>ANALOG>BODY’
If it is ‘500 g’ or lower, replace the K developer, and execute the following:
‘FUNCTION>INSTALL>NLSET-K’ (about 2 min 30 sec)
Then, check to make sure that the setting of ‘PASCAL’ is ‘1’, and execute auto grada-
tion correction.
3.4.6 The copy has vertical streaks/vertical lines (the main scanning direction).
1) Generate a halftone test print (PGTYPE=5). Are vertical streaks/
vertical lines noted?
If the problem is noted in all colors, go to step 12.
If the problem is noted in a specific color, go to the next step.
NO: Go to step 16.
Primary charging assembly cleaner
2) Does the cleaner of the primary charging assembly stop in the
middle?
NO: Check the motor of the cleaner.
Primary charging wire, Pre-primary charging wire
3) Clean the primary charging wire and the pre-primary charging
wire. Is the problem corrected?
YES: End.
Grid plate
4) Are there scratches or dirt on the grid plate?
YES: Replace the grid plate.
Photosensitive drum
5) Are there scratches in the peripheral direction of the photosensitive
drum?
YES: Replace the photosensitive drum. If scratches are found, remove
the cause. Further, keep in mind that scratches on the photosensi-
tive drum can damage the cleaning blade; if such is the case, re-
place the cleaning blade also.