Canon CP660 Service Manual page 323

20 E806
Cause Step
Connectors 1
(heat discharge
fan 2 drive
assembly)
Connectors (24 2
V for heat dis-
charge 2 drive)
Heat discharge 3
fan 2
Developing 4
rotary motor
PCB
Main relay 5
PCB
DC power sup- 6
ply (printer
unit)
COPYRIGHT © 1999 CANON INC.
Download free service manual at http://printer1.blogspot.com
Checks
Are the connectors J703 and J706
on the developing rotary motor PCB
and the connector J220 on the DC
controller PCB connected?
Is the connector J701 on the devel-
oping rotary motor PCB, connectors
J648 and J641 on the main relay
PCB, and connector J102 on the DC
power supply connected securely?
Does the voltage between the con-
nector J703-3 (FAN2ON) and J703-
1 (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-
nector J701-1 (+24 VB) on the
developing rotary motor PCB and
J701-2 (GND) on the developing
rotary motor PCB change to 24 V
immediately after the printer unit is
turned on?
Does the voltage between the con-
nectors J641-1 (+24 VB) on the
main relay PCB and J641-4 (GND)
change to 24 V immediately after
the printer unit is turned on?
Is DC power present in the printer
unit?
CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 10 TROUBLESHOOTING
Yes/No Action
NO Connect the connec-
tors.
NO Connect them securely.
YES Replace the heat dis-
charge fan 2.
YES Replace the developing
rotary motor PCB.
YES Replace the main relay
PCB.
NO See B.2. "DC power is
absent in the printer
unit."
YES Replace the DC con-
troller PCB.
10-41