E015 - Canon NP6251 Service Manual

CHAPTER 11 TROUBLESHOOTING

10. E015

Cause Step
Power supply 1
(motor con-
troller PCB is
integrated with
pick-up motor)
DC controller 2
PCB
3
Pick-up motor 4
(M2)
11-90
COPYRIGHT © 1997 CANON INC.
Download service manual and resetter printer at http://printer1.blogspot.com
Checks
Set the meter to the 200VDC
range, and connect the + probe to
J612-3 and the – probe to J612-4
on the DC controller PCB. Is the
voltage about 12 V?
Is the voltage between the
following pins on the DC controller
PCB as indicated?
(+) (–)
J114B-10 J114B-9 about 12 V
J114B-12 J114B-11
Connect the + probe to J114B-8
and the – probe to GND on the
DC controller PCB. Does the
voltage change to about 5 V as
soon as the motor starts to rotate?
Replace the pick-up motor (M2).
Is the problem corrected?
CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
YES/NO
NO Check the wiring from
the DC power supply
PCB to the motor
controller PCB; if normal,
replace the DC power
supply PCB.
NO Check the wiring from
the DC controller PCB to
the motor controller
PCB; if normal, replace
Voltage
the DC controller PCB.
about 5 V
NO Check the wiring from
the DC controller PCB to
the motor controller
PCB; if normal, replace
the DC controller PCB.
YES End.
Action