The Deck Lifter Fails To Move Up. (Paper Deck-A1) - Canon NP6251 Service Manual

CHAPTER 11 TROUBLESHOOTING

56. The deck lifter fails to move up. (paper deck-A1)

Cause Step
Paper deck 1
-A1
Lifter cable 2
Spring, Lever 3
Deck lifter 4
motor (M102)
DC controller 5
PCB
Deck open
detecting switch
(SW102)
Deck lifter 6
position sensor
(Q110)
DC controller
PCB
11-118
COPYRIGHT © 1997 CANON INC.
Download service manual and resetter printer at http://printer1.blogspot.com
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
CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
YES/NO Action
NO Set the deck correctly.
NO Route the cable
correctly.
NO Remove the pick-up
assembly, and check the
spring lever.
YES Go to step 6.
NO Replace the DC
controller PCB.
YES Check the wiring to the
switch; if normal, replace
the switch.
YES Check the lever and the
wiring; if normal, replace
the sensor.
NO Replace the DC
controller PCB.