The Scanner Fails To Move Forward/In Reverse - Canon NP6330 Service Manual

30

The scanner fails to move forward/in reverse.

Cause Step
Cable 1
Foreign matter 2
DC power 3
supply
Scanner motor 4
(M2)
Motor driver 1 5
PCB
DC controller
PCB
COPYRIGHT © 1997 CANON INC.
Checks
Is the cable for the scanner routed
properly?
Is the scanner rail free of dirt, and
does the scanner move smoothly
when pushed by hand?
Set the meter to the 100VDC
range, and connect its probes to
J634-1 (+) and J634-5 (-) on the
DC power supply PCB. Is the
reader of the meter about 24 V?
Turn off the power switch, and
disconnect J205 from the motor
driver 1 PCB.
Set the meter to the x10
and measure the resistance
between the following terminals on
the connector side of the motor. Is
it normal?
J205-1 J205-2
J205-3 J205-4
J205-1 J205-5
J205-2 J205-5
J205-3 J205-6
J205-4 J205-6
Replace the motor drive 1 PCB. Is
the problem corrected?
CANON NP6330 REV.0 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 11 TROUBLESHOOTING
YES/NO
NO
NO
NO
NO
range,
Resistance ( )
9.6
9.6
4.8
4.8
4.8
4.8
YES
NO
Action
Re-route the cable.
Check the surface of the
scanner rail for dirt and
foreign matter and any-
thing which comes into
contact with the scanner.
See "DC power is
absent."
Replace the scanner
motor.
End.
Replace the DC
controller PCB.
11-93