Canon PC400, Руководство по обслуживанию

Страница: 37 / 62

CHAPTER 4 TROUBLESHOOTING MALFUNCTIONS
4-5
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).