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CHAPTER 10 TROUBLESHOOTING
10–58
COPYRIGHT
©
1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
28.Pick-up fails. (cassette)
1
2
3
4
5
6
NO
NO
YES
YES
NO
NO
YES
Actions
ChecksStep
Cause
Yes/No
Copy paper
Right door
Pick-up roller
Registration clutch
(CL1), Feeding
clutch (CL2)
Pick-up solenoid
(SL1)
DC controller PCB
Are the size of the copy paper in the cassette
and the size indicated by the cassette size
indicator identical?
Is the right door closed securely?
Is the leading edge of copy paper as far as
the registration roller?
Is the pick-up roller soiled or worn?
Open the right door, and press the Copy
Start key while holding paper over the right
door open/closed sensor. Does the feeding
roller or the pull-out roller rotate?
Set the meter range to 30 VDC, and connect
the meter probes to J107-B8(+) and J107-
B9(-). Does the voltage reading change from
0 to 24 V when the Start key is pressed?
Set the cassette size indicator
once again.
Close the right door securely.
See "The registration roller
fails to rotate."
If the pick-up roller is soiled,
clean it with alcohol. If it is
deformed by wear, replace it.
Check the drive gear for
damage. Check the wiring
from the DC controller PCB
to each clutch; if normal
replace the clutch.
Check the wiring from the DC
controller PCB to SL1; if
normal, replace SL1.
Replace the DC controller
PCB.