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COPYRIGHT
©
1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 10 TROUBLESHOOTING
10–59
YES
YES
NO
YES
NO
Yes/No
29.Pick-up operation fails. (multifeeder)
Multifeeder solenoid
(SL2)
DC controller PCB
Multifeeder roller
clutch (CL3)
DC controller PCB
1
2
3
Is the leading edge of copy paper as far as the
registration roller?
Set the meter range to 30 VDC, and connect
the probes to J107-B3 (+) and J107-B4 (-) on
the DC controller PCB. Does the voltage
change from 0 to 24 V when the Start key is
pressed?
Set the meter range to 30 VDC, and connect
the probes to J107-B1 (+) and J107-B2 (-).
Does the voltage change from 0 to 24 V
when the Start key is pressed?
Actions
ChecksStep
Cause
See “The registration roller
fails to rotate.”
Check the wiring from the DC
controller PCB to the
multifeeder solenoid; if
normal, replace the solenoid.
Replace the DC controller
PCB.
Check the wiring from the DC
controller PCB to multifeeder
roller clutch; if normal,
replace the clutch.
Replace the DC controller
PCB.
30.The registration roller fails to rotate.
Registration paper
sensor (PS5)
Registration roller
clutch (CL1)
DC controller PCB
1
2
Is the registration paper sensor normal?
(See the instructions on how to check
photointerrupters.)
Set the meter to the 30 VDC, and connect
the probes to J211-7 (+) and J211-6 (-).
Does the voltage change from 0 to 24 V
when the Start key is pressed?
Check the wiring from the DC
controller PCB to the
registration paper sensor; if
normal, replace the sensor.
Check the drive gear for
damage. Check the wiring
from the DC controller PCB
to registration roller clutch; if
normal, replace the clutch.
Replace the DC controller
PCB.
Actions
ChecksStep
Cause
NO
YES
NO
Yes/No