CHAPTER 13 TROUBLESHOOTING
13-106
COPYRIGHT © 1999 CANON INC. CANON CLC1120/1130/1150 REV.0 MAR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
b.
E020=xx80, xx81 (The first two digits indicate color; e.g., xx=00 for all colors, 01 for M, 02
for C, 03 for Y, and 04 for Bk.)
Cause
Photosensitive
drum
Laser exposure
system
------------
Black toner
concentration
sensor
Y/M/C toner
concentration
sensor
Action
Replace the cleaning
blade.
Adjust the power. If
output is absent, replace
the laser unit or the laser
driver.
Go to step 7.
Clean the window.
End.
End.
Check the wiring from
the DC driver PCB to
the black toner
concentration sensor; if
normal, replace the
black toner
concentration sensor.
End.
Check the wiring from
the DC driver PCB to
the toner concentration
sensor; if normal,
replace the toner
concentration sensor.
Step
1
2
3
4
5
6
7
Yes/No
YES
NO
NO
YES
NO
NO
YES
NO
YES
Checks
Is the photosensitive drum soiled?
Is the laser power normal?
Is E020 indicated for Bk? (Is it
E020=04xx?)
Is the window of the black toner
concentration sensor soiled?
Execute
FUNCTION>INSTALL>INIT-K
in service mode. Is E020 indicated
once again?
Replace the black developer, and
execute INIT-K once again. Is
E020 still indicated?
Execute
FUNCTION>INSTALL>INIT for
the color for which E020 is
indicated in service mode. Is E020
indicated once again?
Caution:
Be sure to wait until initial rotation has ended before executing service mode. Otherwise,
malfunction can occur. (This is not limited to INIT.)
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