Canon CP660 Service Manual page 316

CHAPTER 10 TROUBLESHOOTING
9 E021
Cause Step
Toner cartridge 1
Developing 2
rotary motor
drive assembly
Connector 3
(developing
rotary drive
assembly)
5V supply line 4
(developing
rotary position
sensor)
Developing 5
rotary position
sensor
Developing 6
rotary stopper
Developing 7
rotary motor
PCB
Fuse (develop- 8
ing rotary
motor PCB)
10-34
COPYRIGHT © 1999 CANON INC.
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Checks
Does the shutter of each toner car-
tridge open properly (as it is set in
the printer unit)?
Close the toner cartridge cover, and
turn off then on the power. Is the
developing rotary stopper arm still
holding the developing rotary
assembly in place?
Are the connectors J704 and J706
on the developing rotary motor PCB
and the connector J220 on the DC
controller PCB connected securely?
Are the connector J43 of the devel-
oping rotary position sensor, relay
connector J42, and connector J207
on the DC controller PCB connected
securely?
Replace the developing rotary posi-
tion sensor. Is the problem correct-
ed?
Is the operation of the developing
rotary stopper arm normal?
Disconnect the connector J705 of
the developing rotary stop solenoid
(SL5); then, measure the resistance
between connectors J605-10 and
J605-12 on the harness side and
between J705-11 and J705-12. Is it
about 30 Ω to 60 Ω?
Does the voltage between the con-
nectors J220-A6 (RLSROT) and
J220-B5 (GND) on the DC controller
PCB change from about 0 to about
3.5 V immediately after the printer
unit is turned on?
Is the fuse (FU701, FU702) on the
developing rotary motor PCB blown?
Yes/No
NO
YES
NO
NO
NO
YES
NO
YES
YES
NO
CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
Action
Replace the toner car-
tridge whose shutter is
not open.
Go to step 6.
Go to step 3.
Connect the connec-
tors securely.
Connect the connec-
tors securely.
End.
Replace the developing
rotary stopper solenoid.
Replace the developing
rotary motor PCB.
Replace the fuse.
Replace the developing
rotary motor. If the
problem cannot be cor-
rected, replace the DC
controller PCB.