Canon 1000S, Service Manual

Page: 539 / 840

7-103
COPYRIGHT © 2001 CANON INC. CANON CLC1000/1000S/3100 REV.2 MAY 2001 PRINTED IN JAPAN (IMPRIME AU JAPON)
7. TROUBLESHOOTING IMAGE FAULTS/MALFUNCTIONS
12 E023
13 E030
Cause
Developing
assembly
Developing
motor drive
system
Developing
motor
for Y (M18Y)
for M (M18M)
for C (M18C)
for Bk (M18K)
DC controller
PCB
Step
1
2
3
4
Checks
Check the detail code of E023 using
‘JAM/ERR’ under ‘DISPLAY’ in
service mode.
Remove the developing assembly for
which ‘E023’ is indicated. Turn the
cylinder gear in its normal direction.
Does it turn smoothly?
Do the belt and the pulley rotate
smoothly?
Set the meter to the 12VDC range.
When the Start key is pressed, does
the voltage between the following
terminals on the DC controller PCB
change from 5 V to 0 V?
for Y J2226A-7 (+) — J2226A-8 (–)
for M J2226A-10 (+) — J2226A-11 (–)
for C J2223B-2 (+) — J2223B-3 (–)
for Bk J2223B-5 (+) — J2223B-6 (–)
Yes/No
NO
NO
YES
NO
Action
Check the inside of the
developing assembly for
foreign matter. Check the
drive system for damage
to gear.
Check the gears of the
drive system for damage
and fault.
Replace the developing
motor.
Replace the DC controller
PCB.
Cause
DC controller
PCB
Step
1
Checks
Does the total copy counter operate
normally?
Yes/No
NO
YES
Action
See “The counter fails to
operate.”
Replace the DC controller
PCB.