The Lifter Fails To Move Up; (Cassette) - Canon NP6251 Service Manual

35. The lifter fails to move up. (cassette)
Cause Step
Cassette size 1
detecting switch
Gear, 2
Lever
Latch assembly 3

(cassette)

Spring, 4
Lever
Lifter position 5
sensor
Cassette 3 lifter 6
motor (M14),
Cassette 4 lifter
motor (M15)
DC controller
PCB
COPYRIGHT © 1997 CANON INC.
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Checks
Is the size of the cassette
indicated on the message display?
Slide out the cassette, and move
up the lifter by hand. Does it move
smoothly?
Is the movement of the latch
assembly of the grip on the
cassette normal?
Push up the pick-up roller
releasing lever with a finger. Does
the pick-up roller move down?
Is the lifter sensor (PS25, PS28)
normal?
Connect the connectors, and turn
on the power switch. Set the
meter to the 30VDC range, and
connect the – probe to GND, and
the + probe to the following. Does
the voltage change from about 0
to 24 V when the cassette is slid
in?
M14:J119A-9
M15:J119A-11
CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 11 TROUBLESHOOTING
YES/NO Action
NO Check the cassette size
detecting switch.
NO Remove the pick-up
assembly, and check the
gear and the lever.
NO Install the latch
assembly correctly.
NO Remove the pick-up
assembly, and check the
spring and the lever.
NO Check the lever and the
wiring; if normal, replace
the sensor.
YES Remove the pick-up
assembly, and check the
gear; if normal, replace
the motor.
NO Replace the DC
controller PCB.
11-105