Canon GP405 Service Manual page 510

CHAPTER 14 TROUBLESHOOTING
40 Pick-up operation fails (from the cassette).
Cause
Cassette
Pick-up roller
Harness,
Connector
Fuse (FU1601;
pick-up PCB)
SL1
Pick-up motor
Pick-up PCB
DC controller
PCB, Image
processor PCB
14-92
Step Check
1 Does the Add Paper message fail to
turn off?
2 Correct the setting of the cassette.
Is the problem corrected?
3 Has the pick-up roller reached the
end of its life?
4 Check the wiring. Is there a fault?
5 Is there continuity in the fuse
(FU1601) on the pick-up PCB?
6 Is there continuity in the pick-up
roller down solenoid (SL1)?
7 Replace the pick-up motor. Is the
problem corrected?
8 Replace the pick-up PCB. Is the
problem corrected?
COPYRIGHT © 1999 CANON INC. CANON 405/335 REV.0 JAN. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
Yes/No Action
YES See "The Add Paper
message fails to turn off."
YES End.
YES Replace the pick-up
roller.
YES Correct the wiring.
NO Replace the fuse
(replace the pick-up
PCB as necessary).
NO Replace the solenoid.
YES End.
YES End.
NO Check the harness
(continuity) between the
image processor PCB
and the DC controller
PCB; if normal, replace
the DC controller PCB
and the image processor
PCB.