Canon CLC5000 Service Manual page 483

CHAPTER 5 TROUBLESHOOTING IMAGE FAULTS/MALFUNCTIONS
Primary charging assembly
6) Is the primary charging assembly inserted properly?
NO:
7) Are the charging wires of the primary charging assembly and the
YES: Re-install the charging wire.
8) Are the charging wires of the primary charging assembly and the
YES: Clean them or re-install them.
9) Is there electrical continuity between charging wire, grid, and
NO:
10) Is the grid broken, slack, or soiled?
NO:
HVT2 PCB
11) Is the high-voltage output from the HVT2 PCB normal?
YES: Check the connectors on the HVT2 PCB and the high-voltage
Pre-exposure lamp
12) Is the pre-exposure lamp normal?
NO:
Photosensitive drum
13) Is the photosensitive drum grounded?
NO:
YES: Replace the photosensitive drum.
Potential sensor
14) Clean the potential sensor. Is the problem corrected?
YES: End.
Environment sensor
15) Check the temperature and humidity using 'DISPLAY > ANALOG'
NO:
YES: Replace the DC controller PCB.
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Re-install it.
pre-primary charging assembly broken?
pre-primary charging assembly soiled?
shielding plate?
Further, is there a trace of leakage on the primary charging assem-
bly or the pre-primary charging assembly?
Replace the primary charging assembly.
Replace the grid.
Is the connection of each connector on the HVT2 PCB normal?
cable; if normal, replace the HVT2 PCB.
Turn on the pre-exposure lamp using 'FUNC > F-MISCp > I/O' in
service mode. Is it normal?
Check the wiring from the DC controller PCB to the pre-exposure
lamp; if normal, replace the pre-exposure lamp.
Ground it.
Check the wiring from the DC controller PCB to the potential sen-
sor; if normal, replace the potential sensor unit.
in service mode. Is the environment sensor normal?
Check the wiring from the DC controller PCB to the environment
sensor; if normal, replace the environment sensor.
COPYRIGHT © 2001 CANON INC. 2000 2000 2000 2000 CANON CLC5000 REV.0 JAN. 2001