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COPYRIGHT © 1998 CANON INC. CANON PC400/420/430,FC200/220 REV.0 JAN.1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
10-28
CHAPTER 10 TROUBLESHOOTING
9. The main motor fails to rotate.
10. The copyboard fails to move.
Cause
Step
Checks
YES/NO
Remedies
Main motor (M1)
1
Set the meter to the ‘30VDC’
range. Does the voltage
between J903-1 (+) and J903-2
change from about 0 V to about
20 V according to the operation
of the main motor?
YES
Replace the main motor.
DC controller/DC
power supply PCB
NO
Check the wiring from the
motor to the DC controller/
DC power supply PCB; if
normal, replace the DC
controller/DC power
supply PCB.
Cause
Step
Checks
YES/NO
Remedies
Main motor (M1)
1
Is the main motor rotating?
NO
See “The main motor fails
to rotate.”
Copyboard,
Copyboard drive
assembly
2
Push the copyboard by hand.
Does it move smoothly?
NO
Check the copyboard and
copyboard drive assembly.
DC controller/DC
power supply PCB
3
Set the meter to the ‘200
Ω
’
range. Disconnect J902 from
the copyboard drive solenoid,
and measure the resistance
between terminals of SL2.
Is it about 120
Ω
?
YES
Check the wiring from the
solenoid to the DC con-
troller/DC power supply
PCB; if normal, replace
the DC controller/DC
power supply PCB.
Copyboard drive
solenoid (SL2)
NO
Check the solenoid (SL2).