The Deck Lifter Fails To Move Up - Canon NP6251 Service Manual

CHAPTER 11 TROUBLESHOOTING
33. The deck lifter fails to move up. (front paper deck + cassette)
Cause Step
Deck 1
Lifter cable 2
Spring, Lever 3
Pick-up motor 4
(M2)
DC controller 5
PCB, Deck
open/closed
sensor (PS38,
right deck;
PS40, left deck)
Lifter position
6
sensor (PS32,
right deck;
PS40, left deck)
Deck lifter drive 7
motor (M18,
right deck; M19,
left deck)
DC controller
PCB
11-102
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Checks
Is the deck set correctly?
Is the lifter cable routed correctly?
Push down the pick-up roller
releasing lever with a finger. Does
the pick-up roller move down?
Does the pick-up motor (M2)
rotate?
Set the meter to the 12VDC
range. Does the voltage between
J116B-8/J121A-2 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. Is the voltage between
J116A-7/4 (+) and GND (–) as
indicated when the deck is
opened/closed?
when closed, 0 V
when opened, 5 V
Set the meter to the 30VDC
range. Does the voltage between
J119B-9 (left)/11(right) (+) and
GND (–) on the DC controller PCB
change from 0 to 24 V when the
deck is slid into the machine?
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 and the lever.
YES Go to step 6.
NO Replace the DC
controller PCB.
YES Check the wiring up to
the sensor; if normal,
replace the sensor.
YES Check the lever and the
wiring; if normal, replace
the sensor.
YES Check the wiring up to
the deck lifer drive
motor; if normal, replace
the clutch.
NO Replace the DC
controller PCB.