Canon GP605 Service Manual page 698

CHAPTER 13 TROUBLESHOOTING
66 The lifter fails to move up.
Cause Step
Gear lever
Spring lever
Deck open/
closed sensor
Deck limit
sensor
Lifter motor
DC controller
PCB
13-106
COPYRIGHT © 1999 CANON INC.
1 Remove the deck, and move up the lifter
by hand. Does it move smoothly?
2 Push up the pickup roller releasing lever
with your finger. Doe the pickup roller
move down?
3 Is the voltage of the following connectors
on the DC controller PCB about 5 V when
the deck is inserted?
right deck (PS23): J511-B5
left deck (PS33): J518-B2
4 Is the voltage of the following connectors
on the DC controller PCB about 0 V ?
right deck (PS24): J511-B8
left deck (PS34): J518-B5
5 Turn on the main power switch and the
control paper switch, and set the meter
range to 30 VDC.
Connect the - probe to the ground and the
+ probe to the connectors on the DC
controller PCB. Does the voltage change
from about 0 to 24 V?
right deck (M13): J514-A4
left deck (M14):
Checks
J514-B1
CANON GP605/605V REV.0 JAN. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
Yes/No Action
NO Remove the pickup
assembly, and check
the gear and the lever.
NO Remove the pickup
assembly, and check
the spring and the
lever.
NO Check the sensor flag
and the wiring; if
normal, replace the
sensor.
NO Check the sensor flag
and the wiring; if
normal, replace the
sensor.
YES Replace the deck lifter
motor.
NO Replace the DC
controller PCB.