Canon CLC5000 - The Copy Is Blank

COPYRIGHT © 2001 CANON INC. 2000 2000 2000 2000 CANON CLC5000 REV.0 JAN. 2001
CHAPTER 5 TROUBLESHOOTING IMAGE FAULTS/MALFUNCTIONS
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3.4.16 The copy is blank.
1) Generate a horizontal test print (PG-TYPE=10). Is the image nor-
mal?
YES: Check the wiring of the following PCBs; if normal, replace it.
• Analog processor PCB
• Video controller PCB
• Image processor PCB
• CCD unit
Potential control fault
2) Execute ‘FUNC > EPC’ in service mode. Is the copy image gener-
ated immediately after the execution normal?
YES: End.
Transfer unit
3) Is a fault noted on the transfer blade?
YES: Replace it.
Developing motor
4) Is the developing cylinder rotating during development?
NO: Check the developing motor.
Transfer high voltage
5) Turn off the power switch during development. Lower the transfer
unit, and release the transfer unit and the photosensitive drum by
hand; then, lift the hopper to remove the photosensitive drum unit.
Is the image on the drum normal?
YES: • Check the transfer high-voltage system.
• Check the high-voltage cable from the HVT PCB to the transfer
unit; if normal, replace the HVT PCB.
• Check the internal static eliminating high-voltage system.
NO: • Check the developing bias system.