Canon GP335 Service Manual page 518

CHAPTER 14 TROUBLESHOOTING
54 Pick-up operation fails (from the side paper deck).
Cause
Upper right door,
Lower right door
Lifter
Deck pick-up
roller
Belt
Drive belt, Gear,
Coupling
IP PCB, Side deck
driver PCB
Deck pick-up
clutch (CL102),
Deck feeding
clutch (CL101)
14-100
Step Check
1 Are the upper right door and the
lower right door closed firmly?
2 Does the lifter move down when
the compartment is slid out of the
deck. In addition, is the lifter
movement (upward) heard when
the compartment is set?
3 Does the pick-up roller rotate?
4 Is the belt used to transmit drive to
the pick-up roller routed correctly?
5 Is the drive from the deck main
motor transmitted to the pick-up
assembly through the drive belt,
gear, and coupling?
6 Set the meter range to 30 VDC.
Does the voltage between J104-11
(pick-up)/104-6 (feeding) on the
side deck driver PCB and GND
change from 24 V to 0 V when the
Copy Start key is pressed?
COPYRIGHT © 1999 CANON INC. CANON 405/335 REV.0 JAN. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
Yes/No Action
NO Close the doors.
NO See "The lifter fails to
move up."
YES If the roller is soiled,
clean it with alcohol. If
it is deformed because
of wear, replace it.
NO Correct the routing.
NO Check the drive belt,
gear, and coupling.
NO Check the side deck
driver PCB and the IP
PCB.
YES Check the wiring to the
clutch; if normal, replace
the clutch.