The Drum Heater Fails To Rotate.7-136 - Canon 1000 Service Manual

7. TROUBLESHOOTING IMAGE FAULTS/MALFUNCTIONS
47 The drum heater fails to rotate.
Cause Step
Drum heater
(H3, H4, H5,
H6)
Thermistor
(THM4, 5, 6, 7)
Connector,
Wiring
Drum heater
brush
DC controller
PCB
7-136
COPYRIGHT © 2001 CANON INC.
Checks
Set the meter to the ×100Ω range,
1
and connect the probes of the meter
to the terminals (J9-1, J9-3) of the
heater. Does the index of the meter
swing?
Set the meter to the ×1000Ω range,
2
and connect the probes of the meter
to the following terminals. Does the
index of the meter swing?
THM4 (for Y): J2216A-4 and-5
THM5 (for Bk): J2216B-9 and -10
THM6 (for M): J2216A-9 and -10
THM7 (for C): J2216B-4 and -5
3 Are the connection and wiring of the
following connectors normal?
J9, J5, J6, J61
Power-saving switch
Drum heater
4 Disconnect the power outlet, and
remove the drum heater brush
cover. Is the contact of the drum
heater brush normal?
5 Install the drum heater brush cover,
and connect the power plug. Set the
meter to the 12VDC range, and
measure the voltage between J653-
5 (+; 5 V) and J653-6 (–; DHTRD*)
on the DC controller PCB. Is it about
5 V?
Yes/No
YES
CANON CLC1000/1000S/3100 REV.2 MAY 2001 PRINTED IN JAPAN (IMPRIME AU JAPON)
Action
NO Replace the drum heater.
NO Replace the thermistor.
NO Re-connect them.
NO • Re-install the brush.
• Replace the brush.
Replace the drum heater.
NO Replace the DC controller
PCB.