Canon 1130 Service Manual page 691

CHAPTER 13 TROUBLESHOOTING
Cause
HVT-DC PCB
Primary charging
grid plate
High-voltage
cable
HVT-DC PCB
Post-cleaning
charging assembly
High-voltage
cable
Laser exposure
system
Photosensitive
drum
13-114
COPYRIGHT © 2002 CANON INC.
Step Checks
9 Is the primary charging assembly
fitted properly?
10 Is the grid plate of the primary
charging assembly mounted
properly?
11 Is there electrical continuity from
the grid plate of the primary
charging assembly to the high-
voltage transformer (HVT-DC)?
12 Is the post-cleaning charging
assembly fitted properly?
13 Is the post-cleaning charging wire
broken or soiled?
14 Are there traces of leakage in the
post-cleaning charging assembly?
15 Is there electrical continuity from
the post-cleaning charging
assembly to the high-voltage
transformer (HVT-DC)?
16 Is the movement of the laser shutter
normal?
17 Is the dust-proofing glass or the
bending mirror soiled?
18 Is the laser power normal? (See the
descriptions given for how to adjust
the laser power.)
CANON CLC1100/1130/1150/1160/1180 REV.2 FEB. 2002 PRINTED IN JAPAN (IMPRIME AU JAPON)
Yes/No Action
NO Fit the assembly
properly.
NO Mount the grid plate
properly.
NO Check the grid high-
voltage cable.
YES Replace the HVT-DC
PCB. Turn off and then
on the power switch; if
the error is indicated
once again, go to step 2.
NO Fit the assembly
properly.
YES Clean or fit the charging
wire properly.
YES Replace the post-
cleaning charging
assembly.
NO Check the post-cleaning
high-voltage cable.
YES Replace the HVT-DC
PCB. Turn off and then
on the power switch; if
the error is indicated
once again, go to step 2.
NO Check the shutter
assembly.
YES Clean it.
NO Adjust the laser power.
If output is absent,
replace the laser unit or
the laser driver.
YES Check the
photosensitive drum for
grounding; if normal,
replace the
photosensitive drum.
(After replacement,
execute the work under
II. C. 2.)
Turn off and then on the
power switch; if the
error is indicated once
again, go to step 2.