Canon 1000 Service Manual page 536

7. TROUBLESHOOTING IMAGE FAULTS/MALFUNCTIONS
b. E020=XX60, XX70
Cause Step
Photosensitive
drum
SALT sensor
c. E020=XX80, XX81, XX82, XX85, XX86, XX87, XX8F, XXC0, XXC1, XXC2, XXC5, XXC6, XXC7
Cause Step
Backup data
DC controller
PCB
d. E020=XX90, XX91
Cause Step
SALT sensor
(dirt)
SALT sensor
shutter
Shutter
open/close
solenoid
7-100
COPYRIGHT © 2001 CANON INC.
Checks
1 Is the photosensitive drum soiled?
2 Clean the window of the SALT
sensor. Is the problem corrected?
Checks
1 Of 'INSTALL' under 'FUNC' in
service mode, is the value on the
3rd, 4th page the same as that
indicated on the service label?
2 Replace the DC controller PCB. Is
the problem corrected?
Checks
1 Is the window of the SALT sensor
soiled with toner?
2 Is the opening/closing operation of
the SALT sensor shutter normal?
Yes/No
Yes/No
Yes/No
CANON CLC1000/1000S/3100 REV.2 MAY 2001 PRINTED IN JAPAN (IMPRIME AU JAPON)
Action
YES Replace the cleaning
blade.
Be sure to clean the SALT
sensor as well.
YES End.
NO Check the wiring from the
DC controller PCB to the
SALT sensor; if normal,
replace the SALT sensor.
Action
NO Enter the value of 'DC-
CON' under 'FUNC' in
service mode.
YES End.
Perform the steps indi-
cated for replacing the DC
controller PCB.
Action
YES Clean it.
NO 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."
YES Check the wiring from the
DC controller 2 to the
solenoid; if normal,
replace the solenoid.