The Multifeeder Fails To Pick Up Paper; The Registration Roller Fails To Rotate - Canon 1000 Service Manual

42

The multifeeder fails to pick up paper.

Cause Step
Multifeeder pick-
up clutch (CL6)
Multifeeder pick-
up roller
Lifter plate
Paper thickness
roller clutch
(CL7)
Multifeeder pick-
up solenoid
(SL5)
DC controller
PCB
43

The registration roller fails to rotate.

Cause Step
Gear
Registration
roller clutch
(CL8)
Registration
roller clutch
(CL8)
DC controller
PCB
COPYRIGHT © 2001 CANON INC.
Checks
1 Select multifeeder pick-up, and
press the Start key. Does the
multifeeder pick-up roller rotate?
2 Is paper fed properly by the pick-up
roller?
3 Press the Start key. Does the lifter
plate move up?
4 Press the Start key. Does the roller
rotate?
5 Connect the + probe of the meter to
J2207A-3 on the DC controller PCB
and press the Start key. Does the
voltage change from about 24 V to
about 0 V?
Checks
1 Is the drive from the pick-up motor
(M10) transmitted through gears?
2 Turn OFF the power switch, and
disconnect J2951 on the multifeeder
relay PCB. Set the meter to the
×100Ω range, and measure the
resistance between J2951-7 and -8
on the harness side. Is it about
120Ω?
3 Connect J2951, and turn ON the
power switch. Set the meter to the
30VDC range, and measure the
voltage between J2207A-4 and -6
on the DC controller PCB. Does it
change from about 0 V to about 24
V after pick-up?
CANON CLC1000/1000S/3100 REV.2 MAY 2001 PRINTED IN JAPAN (IMPRIME AU JAPON)
7. TROUBLESHOOTING IMAGE FAULTS/MALFUNCTIONS
Yes/No
NO
YES
NO
NO
YES
NO
Yes/No
NO
NO
YES
NO
Action
Check the wiring; if
normal, replace CL6.
Replace the pick-up roller.
Check the lifter plate drive
system. As necessary,
adjust or replace it.
Check the wiring; if
normal, replace the
clutch.
Check the wiring; if
normal, replace SL5.
Replace the DC controller
PCB.
Action
Check the gears.
Check the wiring from
J2951 to CL9; if normal,
replace CL8.
Replace the clutch.
Replace the DC controller
PCB.
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