Dc Power Is Absent - Canon CLC 1120 Service Manual

40

DC power is absent.

Cause
AC power supply
Transfer unit lever
switch (SW3), left
front door switch
(SW4), delivery
door switch
(SW5)
DC power supply
PCB
COPYRIGHT © 1999 CANON INC.
Step
1 Is AC power present between the
following terminals?
between J701-1 and J701-3 and
between J701-2 and J701-4 on the
DC power supply PCB
2 Turn off the power switch, and
disconnect the power plug; then,
check each switch (SW3, SW4,
SW5) for electrical continuity. Is it
normal?
3 Disconnect all connectors of the
DC power supply PCB (J1702,
J1703, J1704, J1705, J1706).
Connect the power plug to the
power outlet, and turn on the power
switch. Is the DC power output of
each connector normal?
Connector
J1702
J1703
J1704
J1705
J1706
CANON CLC1120/1130/1150 REV.0 MAR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 13 TROUBLESHOOTING
Checks
Pin Output
1 38V
1 to 4 24V
1 12V
3 3.3V
1 24V-F
3 8.8V
5 8VR
7 -8V
9 15V
1, 2 5V
Yes/No Action
NO See "AC power is
absent."
NO Replace the faulty
switch.
NO Replace the DC power
supply PCB.
13-131