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8. E064
9. E202 (keys on control panel invalidated)
COPYRIGHT
©
1997 CANON INC. CANON NP6218 REV. 0 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
10-67
CHAPTER 10 TROUBLESHOOTING
Cause
Wire
Composite
power supply
PCB
Transfer charg-
ing assembly,
Transfer
charging roller
Primary
charging roller
High-voltage
cable
Checks
Turn off and on the power switch,
and set ‘1’ as the copy count. Is
E064 indicated after copying
operation?
Set ‘1’ as the copy count, and
press the Copy Start key once
again. Is E064 indicated after
copying operation?
Is a fault noted in the transfer
charging assembly/transfer roller
or contacts?
Detach the drum cartridge, and
check the primary charging roller.
Is a fault noted in the primary
charging roller or the contacts?
Detach the rear cover, and check
the high-voltage cable. Is a
scratch or crack found in the high-
voltage cable?
Step
1
2
3
4
5
Results
YES
YES
YES
YES
YES
Action
Check the harness
between the DC
controller PCB and the
composite power supply
PCB.
Go through steps 3
through 6; then, replace
the composite power
supply PCB.
Replace the transfer
corona assembly/transfer
roller.
Replace the drum
cartridge.
Replace the high-voltage
terminal.
Checks
Is the scanner at home position
when E202 is indicated?
Is the scanner home position
sensor (PS1) normal? (See
descriptions on how to check
photointerrupters.)
Cause
Scanner home
position sensor
(PS1)
DC controller
PCB check
Step
1
Results
NO
NO
YES
Action
See “The scanner fails to
move forward/
in reverse.”
Check the wiring
between the DC
controller PCB and PS1;
if normal, replace PS1.
Replace the DC
controller PCB.