The No. 1 Mirror Fails To Operate - Canon ImageRunner 600 Service Manual

CHAPTER 13 TROUBLESHOOTING
71

The No. 1 mirror fails to operate.

Cause Step
Copyboard glass
Copyboard glass
sensor (PS57)
Cable
Scanner path
Relay PCB
DC controller
PCB
Scanner motor
driver PCB
Scanner motor
(M5)
13-110
COPYRIGHT © 1999 CANON INC.
1 Is the copyboard glass mounted correctly?
2 Measure the voltage of J804-2 on the
scanner motor driver PCB.
• Is it 5 V when the copyboard glass is
mounted?
• Is it 0 V when the copyboard glass is
removed?
3 Is the scanner drive cable routed
correctly?
4 Is the scanner rail free of dirt, and does
the scanner move smoothly when pushed
by hand?
5 Measure the voltage of J801 on the
scanner motor driver PCB. Is it as
indicated?
J801-1: 38 V
J801-3: 12 V
J801-5: -12 V
J801-6: 5 V
6 Measure the voltage of J506-A12 on the
DC controller PCB. Does it change from
0 to 5 V when the control panel power
switch is turned on?
7 Replace the scanner motor driver PCB. Is
the problem corrected?
Checks
CANON imageRUNNER 600 REV.1 JAN. 2000 PRINTED IN U.S.A.
Yes/No Action
NO Mount the copyboard
so that it turns on the
copyboard glass sensor
(PS57) correctly.
NO If the voltage does not
change when the
sensor is pressed by
hand and the wiring is
free of a problem,
replace the sensor.
NO Route the cable
correctly.
NO Check the rail for dirt
and foreign matter; as
necessary, clean,
lubricate, or correct.
Reference:
If the rail is soiled,
clean it with
alcohol, and apply a
small amount of
silicone oil (FY9-
6010).
NO Check the AC line up
to the relay PCB; if
normal, replace the
relay PCB.
NO Check the wiring; if
normal, replace the DC
controller PCB.
YES End.
NO Replace the scanner
motor (M5).