Pcb - Canon 1130 Service Manual

CHAPTER 13 TROUBLESHOOTING
7 E013
Cause
Waste toner
feedscrew
Waste toner
feedscrew lock
detecting switch
(SW7)
DC driver PCB,
CPU PCB
8 E014
Cause
------------
Fixing roller drive
assembly
Fixing oil
application system
DC fuse PCB
Fixing motor
(M5)
DC driver PCB,
CPU PCB
13-102
COPYRIGHT © 2002 CANON INC.
Step Checks
1 Is the waste toner feedscrew drive
gear pushing the waste toner
feedscrew lock detecting switch
(SW7)?
2 Is the voltage between J1012-A2
(+) and J1012-A1 (-) on the DC
driver PCB about 5 V when the
switch is pressed and about 0 V
when the switch is released?
Step Checks
1 Does the fixing motor rotate at
specific timing during copying
operation?
2 Does the fixing motor start to
rotate at specific timing during
copying operation?
3 Is the fixing roller coated with
fixing oil?
4 Is 24 V present between J374-1
and -2 of the fixing motor.
5 Set the meter range to 5 VDC, and
measure the voltage between
J1026-B9 (+; FXMON) and J1026-
B10 (-; GND) on the DC driver

PCB.

Does it change from about 0 to
about 5 V when the power switch
is turned off and then on and when
the fixing motor starts to rotate?
CANON CLC1100/1130/1150/1160/1180 REV.2 FEB. 2002 PRINTED IN JAPAN (IMPRIME AU JAPON)
Yes/No Action
YES The feedscrew inside the
waste toner pipe may be
prevented from rotating.
Remove the waste toner
pipe, and try turning the
feedscrew by and.
If it can be turned easily,
mount it back once
again, and see what
happens. If it cannot be
turned easily, replace the
waste toner pipe, and
remove the cause.
NO Replace the switch.
YES Replace the DC driver
PCB or the CPU PCB.
(After replacement,
execute the work under
II. H. 10. or II. H. 1.)
Yes/No Action
YES Go to step 5.
YES Check the fixing roller
drive system for
overload.
NO Check the fixing oil
application system (e.g.,
fixing oil pump).
NO Check the voltage
between J935-1 and -3
of the DC fuse PCB. If it
is not 24 V, replace the
DC fuse PCB.
YES Check the wiring from
J1026 to the fixing
motor; if normal, replace
the fixing motor.
NO Replace the DC driver
PCB or the CPU PCB.
(After replacement,
execute the work under
II. H. 10. or II. H. 1.)