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COPYRIGHT © 2001 CANON INC. CANON CLC1000/1000S/3100 REV.2 MAY 2001 PRINTED IN JAPAN (IMPRIME AU JAPON)
7. TROUBLESHOOTING IMAGE FAULTS/MALFUNCTIONS
b. E020=XX60, XX70
c. E020=XX80, XX81, XX82, XX85, XX86, XX87, XX8F, XXC0, XXC1, XXC2, XXC5, XXC6, XXC7
d. E020=XX90, XX91
Cause
Photosensitive
drum
SALT sensor
Step
1
2
Checks
Is the photosensitive drum soiled?
Clean the window of the SALT
sensor. Is the problem corrected?
Yes/No
YES
YES
NO
Action
Replace the cleaning
blade.
Be sure to clean the SALT
sensor as well.
End.
Check the wiring from the
DC controller PCB to the
SALT sensor; if normal,
replace the SALT sensor.
Action
Clean it.
Check the shutter for
deformation.
Clean the inside by
referring to 3. “Disassem-
bling and Cleaning the
Inside of the SALT Sen-
sor” under E. (SALT
Sensor” in Chapter 4
“Mechanical System.”
Check the wiring from the
DC controller 2 to the
solenoid; if normal,
replace the solenoid.
Cause
SALT sensor
(dirt)
SALT sensor
shutter
Shutter
open/close
solenoid
Step
1
2
Checks
Is the window of the SALT sensor
soiled with toner?
Is the opening/closing operation of
the SALT sensor shutter normal?
Yes/No
YES
NO
YES
Cause
Backup data
DC controller
PCB
Step
1
2
Checks
Of ‘INSTALL’ under ‘FUNC’ in
service mode, is the value on the
3rd, 4th page the same as that
indicated on the service label?
Replace the DC controller PCB. Is
the problem corrected?
Yes/No
NO
YES
Action
Enter the value of ‘DC-
CON’ under ‘FUNC’ in
service mode.
End.
Perform the steps indi-
cated for replacing the DC
controller PCB.
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