Canon PC920 Service Manual page 330

8 E210
Cause Step
---------------- 1
Lens home 2
position
sensor (PS2)
DC control-
ler PCB
9 E220
Cause Step
---------------- 1
Composite 2
power
supply PCB
DC control-
ler PCB
10 E240
Cause Step
Wiring 1
Composite 2
power
supply PCB
DC control-
ler PCB
11 E261
Cause Step
Power 1
supply
frequency
Composite
power
supply PCB
COPYRIGHT © 1999 CANON INC.
Checks
Does the lens move when the power is
turned on?
Is the lens home position sensor (PS2)
normal? (For instructions on how to
check the photointerrupers, see p. 11-
47.)
Checks
Does the scanning lamp turn on when
the Copy Start key is pressed?
Replace the composite power supply
PCB. Is the problem corrected?
Checks
Is the wiring from J203 and J204 on
the composite power supply PCB and
J103 and J104, respectively, on the DC
controller PCB normal?
Replace the composite power supply
PCB. Is the problem corrected?
Checks
Turn off and then on the power switch.
Is the problem corrected?
CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 11 TROUBLESHOOTING
YES/NO
NO See "The lens fails to
move."
NO Check the wiring from
J109 on the DC
controller PCB to PS2;
if normal, replace PS2.
YES Replace the DC
controller PCB.
YES/NO
NO See "The scanning
lamp fails to turn on."
YES End.
NO Replace the DC
controller PCB.
YES/NO
NO Correct the connection
and the wiring of the
connectors.
YES End.
NO Replace the DC
controller PCB.
YES/NO
YES End. However, if
'E261' occurs fre-
quently, advise the
user to use a frequency
stabilizer.
NO Replace the composite
power supply PCB.
Action
Action
Action
Action
11-65