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20. The pick-up operation fails (from cassette).
21. The pick-up operation from the multifeeder fails.
COPYRIGHT
©
1997 CANON INC. CANON NP6218 REV. 0 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
10-73
CHAPTER 10 TROUBLESHOOTING
Checks
Is the paper inside the cassette
under the claws?
Slide out and then in the cassette.
Is the problem corrected?
Does the pick-up roller rotate after
the copy Start key is pressed?
Is the life of the pick-up roller or
the pick-up separation pad at its
limit?
Replace the DC controller PCB. Is
the problem corrected?
Cause
Paper (inside
cassette)
Cassette
Pick-up clutch
(CL2)
Pick-up roller,
pick-up
separation pad
DC controller
PCB
Step
1
2
3
4
5
Results
NO
YES
NO
YES
YES
Action
Advise the user on the
correct method of setting
paper.
End.
• Advise the user on
the correct way to set
the cassette.
Check the wiring from
the connector (J303) on
the DC controller PCB
and the pick-up clutch; if
normal, replace the
clutch.
Replace the pick-up
roller or the pick-up
separation pad.
End.
Checks
Select the multifeeder, and press
the copy Start key. Does the
multifeeder pick-up roller rotate?
Does the paper guide plate spring
up when the Copy Start key is
pressed?
Connect the (+) probe of the
meter to J306-11 on the DC
controller PCB. Does the voltage
change from about 24 V to about
0 V when the Copy Start key is
pressed?
Cause
Multifeeder
pick-up clutch
(CL3)
Paper guide
plate cam
Multifeeder
pick-up
solenoid (SL2)
DC controller
PCB
Step
1
2
3
Results
NO
YES
YES
NO
Action
Check the wiring; if
normal, replace CL3.
Check the position of the
paper guide plate cam
and separation pad; as
necessary, adjust or
replace.
Check the wiring; if
normal, replace SL2.
Replace the DC
controller.