COPYRIGHT © 1999 CANON INC. CANON CLC1120/1130/1150 REV.0 MAR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
13-131
CHAPTER 13 TROUBLESHOOTING
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
Action
See "AC power is
absent."
Replace the faulty
switch.
Replace the DC power
supply PCB.
Step
1
2
3
Yes/No
NO
NO
NO
Checks
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
Turn off the power switch, and
disconnect the power plug; then,
check each switch (SW3, SW4,
SW5) for electrical continuity. Is it
normal?
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
Pin
1
1 to 4
1
3
1
3
5
7
9
1, 2
Output
38V
24V
12V
3.3V
24V-F
8.8V
8VR
-8V
15V
5V
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