56. The deck lifter fails to move up. (paper deck-A1)
COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 11 TROUBLESHOOTING
11-118
Cause
Paper deck
-A1
Lifter cable
Spring, Lever
Deck lifter
motor (M102)
DC controller
PCB
Deck open
detecting switch
(SW102)
Deck lifter
position sensor
(Q110)
DC controller
PCB
Checks
Is the deck set correctly?
Is the lifter cable routed correctly?
Push up the pick-up roller
releasing lever with a finger. Does
the pick-up roller move down?
Does the deck lifter motor rotate?
Set the meter to the 12VDC
range. Does the voltage between
2001A-3 and GND (–) on the DC
controller PCB change from about
0 to 5 V when the deck is closed?
Set the meter to the 12VDC
range. Does the voltage between
J2001A-4 (+) and GND (–) on the
DC controller PCB change as
follows?
when the deck is closed, 0 V
when the deck is opened, 5 V
Step
1
2
3
4
5
6
YES/NO
NO
NO
NO
YES
NO
YES
YES
NO
Action
Set the deck correctly.
Route the cable
correctly.
Remove the pick-up
assembly, and check the
spring lever.
Go to step 6.
Replace the DC
controller PCB.
Check the wiring to the
switch; if normal, replace
the switch.
Check the lever and the
wiring; if normal, replace
the sensor.
Replace the DC
controller PCB.