The Registration Roller Fails To Rotate - Canon NP6330 Service Manual

CHAPTER 11 TROUBLESHOOTING
31

The registration roller fails to rotate.

Cause Step
Belt, gear, 1
coupling
Pre-registration 2
sensor (PS9),
horizontal regis-
tration paper
sensor (PS14)
Registration 3
clutch (CL1),
horizontal
registration
clutch (CL8)
DC controller
PCB
11-94
COPYRIGHT © 1997 CANON INC.
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Checks
Is the drive of the main motor
transmitted to the registration
roller through the belt, gear, and
coupling?
Are the pre-registration sensor
and the horizontal registration
paper sensor normal? (See the
instructions on how to check
photointerrupters.)
Set the meter to the 100VDC
range, and connect its probes to
the following connectors on the
DC controller PCB. Does the
voltage change from 0 to about 24
V as soon as the registration roller
starts to rotate?
Clutch +
CL1 J103-A2
CL8 J103-A4
YES/NO
NO
NO
YES
NO
-
J103-A1
J103-A3
CANON NP6330 REV.0 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
Action
Re-install the belt, gear,
and coupling.
Check the wiring from
the DC controller to the
sensor; if normal,
replace the faulty sensor.
Check the wiring from
the DC controller PCB to
the clutch; then, replace
the clutch.
Replace the DC
controller PCB.