Canon CP660 Service Manual page 322

CHAPTER 10 TROUBLESHOOTING
18 E677/E678/E679
Cause Step
Accessories 1
power
Accessories
19 E805
Cause Step
Connectors 1
(heat discharge
fan 1 drive
assembly)
Connectors (24 2
V for heat dis-
charge fan 1
drive)
Heat discharge 3
fan 1
Developing 4
rotary motor
PCB
Main relay 5
PCB
DC power 6
10-40
COPYRIGHT © 1999 CANON INC.
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Checks
Are the power cables of the acces-
sories and the communication cable
to the printer unit connected secure-
ly?
Checks
Are the connectors J702 and J706
on the developing rotary motor PCB
and the connector J220 on the DC
controller PCB connected securely?
Are the connector J701 on the
developing rotary motor PCB, con-
nectors J648 and J641 on the main
relay PCB, and J102 on the DC
power supply connected securely?
Does the voltage between the con-
nectors J702-3 (FAN1ON) on the
developing rotary motor PCB and
J702-1 (GND) change to about 24
V?
Does the voltage between the con-
nectors J701-1 (+24 VB) and J701-2
(GND) on the developing rotary
motor PCB change to about 24 V
immediately after the printer unit is
turned on?
Does the voltage between the con-
nectors J641-1 (+24 VB) and J641-4
(GND) on the main relay PCB
change to 24 V immediately after
the printer unit is turned on?
Is the DC power present?
Yes/No
NO
YES
Yes/No
NO
NO
YES
YES
YES
NO
YES
CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
Action
Turn off and then on
the power.
Replace the ACC con-
troller PCB.
Action
Connect the connec-
tors.
Connect the connec-
tors.
Replace the heat dis-
charge fan 1.
Replace the developing
rotary motor PCB.
Replace the main relay
PCB.
See B.4."DC power is
absent in the printer
unit."
Replace the DC con-
troller PCB.