Canon CLC 1120 Service Manual page 627

CHAPTER 13 TROUBLESHOOTING
4 E010
Cause
------------
Overload
Main motor (M4)
DC fuse PCB
DC driver PCB,
CPU PCB
Main motor (M4)
13-100
COPYRIGHT © 1999 CANON INC.
Step Checks
1 Does the main motor rotate during
initial rotation?
2 Does the main motor start to but
fail to rotate during initial rotation?
3 Set the meter range to 5 VDC, and
measure the voltage between
J1026-A3 (+; MNMON) and
J1026-A4 (-; 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 main motor starts to rotate?
4 Is 38 V present between J370-1 and
-2 of the main motor?
5 Set the meter range to 5 VDC, and
measure the voltage between
J1026-A2 (+; MNMRDY) and
J1026-A4 (-; GND) on the DC
driver PCB.
Does it change from about 0 V to
about 5 V when the power switch
is turned off and then on and the
main motor starts to rotate?
Yes/No
YES
YES
YES
NO
YES
NO
CANON CLC1120/1130/1150 REV.0 MAR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
Action
Go to step 5.
Check the main motor
drive system for an
overload (e.g.,
photosensitive drum
cleaner).
Check the wiring from
J1026 to the main
motor; if normal, replace
the main motor.
Check the voltage
between J937-4 and -1
on the DC fuse PCB; if
not 38V, replace the DC
fuse PCB.
Replace the driver PCB
or the CPU PCB.
Check the wiring from
J1026 to the main
motor; if normal, replace
the main motor.