Canon Vizcam 1000, Service Manual

Page: 572 / 840

7-136
COPYRIGHT © 2001 CANON INC. CANON CLC1000/1000S/3100 REV.2 MAY 2001 PRINTED IN JAPAN (IMPRIME AU JAPON)
7. TROUBLESHOOTING IMAGE FAULTS/MALFUNCTIONS
47 The drum heater fails to rotate.
Cause
Drum heater
(H3, H4, H5,
H6)
Thermistor
(THM4, 5, 6, 7)
Connector,
Wiring
Drum heater
brush
DC controller
PCB
Step
1
2
3
4
5
Checks
Set the meter to the
×
100
Ω
range,
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
×
1000
Ω
range,
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
Are the connection and wiring of the
following connectors normal?
J9, J5, J6, J61
Power-saving switch
Drum heater
Disconnect the power outlet, and
remove the drum heater brush
cover. Is the contact of the drum
heater brush normal?
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
NO
NO
NO
NO
YES
NO
Action
Replace the drum heater.
Replace the thermistor.
Re-connect them.
• Re-install the brush.
• Replace the brush.
Replace the drum heater.
Replace the DC controller
PCB.