Canon 1130 Service Manual page 681

CHAPTER 13 TROUBLESHOOTING
b. E020=xx80, xx81, 00A3
M, 02 for C, 03 for Y, and 04 for Bk.)
Cause
Photosensitive
drum
Laser exposure
system
------------
Gradation sensor
Black toner
concentration
sensor
Y/M/C toner
concentration
sensor
13-106
COPYRIGHT © 2002 CANON INC.
(The first two digits indicate color; e.g., xx=00 for all colors, 01 for
Step Checks
1 Is the photosensitive drum soiled?
2 Is the laser power normal?
3 Is E020 indicated for Bk? (Is it
E020=04xx?)
4 Is the window of the gradation
sensor soiled? (CLC1140/1160/
1180 only)
5 Is the window of the black toner
concentration sensor soiled?
6 Execute
FUNCTION>INSTALL>INIT-K
in service mode. Is E020 indicated
once again?
7 Replace the black developer, and
execute INIT-K once again. Is
E020 still indicated?
8 Execute
FUNCTION>INSTALL>INIT for
the color for which E020 is
indicated in service mode. Is E020
indicated once again?
CANON CLC1100/1130/1150/1160/1180 REV.1 JAN. 2002 PRINTED IN JAPAN (IMPRIME AU JAPON)
Yes/No Action
YES Replace the cleaning
blade.
NO Adjust the power. If
output is absent, replace
the laser unit or the laser
driver.
NO Go to step 7.
YES Clean. Thereafter, select
'auto gradation
correction' in user mode
(adjust/clean), and
operate as instructed on
the display.
NO Check the wiring from
the DC driver PCB to
the gradation sensor; if
normal, replace the
gradation sensor.
(After replacement,
execute the work under
II. C. 7.)
YES Clean the window.
NO End.
NO End.
YES Check the wiring from
the DC driver PCB to
the black toner
concentration sensor; if
normal, replace the
black toner
concentration sensor.
(After replacement,
execute the work under
II. C. 9.)
NO End.
YES Check the wiring from
the DC driver PCB to
the toner concentration
sensor; if normal,
replace the toner
concentration sensor.
(After replacement,
execute the work under
II. C. 9.)