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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Service mode
7) Are the settings of ‘CCD’ in service mode as indicated on the ser-
vice label?
NO: Enter the correct settings.
8) Execute ‘FUNC > CCD > AUTO-ADJ’. Is the problem corrected?
NO: Try replacing the image processor and the analog processor.
Developing assembly
9) Is uneven density noted in all colors?
NO: Check the developing assembly and the developing cylinder for
which uneven density is noted; if a fault is found, clean or replace
it.
Grid wire (primary charging assembly)
10) Is the grid plate of the primary charging wire normal?
NO: Replace the grid plate.
Pre-exposure lamp
11) Does the pre-exposure lamp turn ON during copying operation?
NO: Check the contact of J2239 on the DC controller PCB and the wir-
ing from J2239 to connector on the pre-exposure lamp PCB; if nor-
mal, replace the pre-exposure lamp PCB.
Transfer/static eliminating system
12) • Is the transfer blade locking mechanism of the transfer unit nor-
mal?
• Are there scratches or a fault on the transfer blade?
• Operate the transfer blade using ‘BLADE’ under ‘FUNC’ in ser-
vice mode to check the locking of the transfer blade. At this time, is
the transfer blade subject to warping or other fault?
YES: Check the transfer blade locking mechanism; if normal, replace the
transfer blade.
Fixing unit
13) Are there scratches or dents in the peripheral direction of the fixing
roller (upper, lower)?
YES: Replace the fixing roller.
14) Is there a fault in the fixing oil applying roller, oil applying blade,
toner removing blade, oil hose, oil tank, fixing oil pump drive sole-
noid (SL2), or oil removing blade?
YES: Remove the cause of the fault, and replace the part.