The No. 1 Mirror Base Fails To Move - Canon iR105 Service Manual

CHAPTER 6 TROUBLESHOOTING

4.1.79 The No. 1 mirror base fails to move

Copyboard glass
1) Is the copyboard glass mounted correctly?
NO:
Copyboard glass sensor (PS57)
2) Measure the voltage of J804-2 of the scanner motor driver. Is it as
NO:
Cable (broken, displaced)
3) Is the cable used to drive the scanner strung correctly?
NO:
Scanner path (foreign matter)
4) Is the scanner rail free of dirt and does the scanner move smoothly
NO:
Reference: If the rail is soiled, clean it with alcohol, and apply a small
Relay PCB
5) Measure the voltage of J801 on the scanner motor driver PCB.
NO:
Reader controller PCB
6) Measure the voltage of J1109-A12 on the reader controller PCB. Is
NO:
Scanner motor driver PCB, Scanner motor (M5)
7) Try replacing the scanner motor driver PCB. Is the problem cor-
YES: End.
NO:
6-134
Mount the copyboard glass so that the copyboard glass sensor
(PS57) is actuated correctly.
follows?
• with the copyboard glass mounted, 5 V
• with the copyboard glass removed, 0 V
If the voltage remains unchanged when the sensor is pushed by
hand and, in addition, the wiring is normal, replace the sensor.
String the cable correctly.
when pushed by hand?
Check the surface of the scanner rail for dirt and foreign matter and
for an object that comes into contact with the scanner; as necessary,
clean, lubricate, or repair.
amount of silicone oil (FY9-6010).
J801-1: 38 V
J801-3: 12 V
J801-5: -12 V
J801-6: 5 V
Check the AC line up to the relay PCB; if normal, replace the relay
PCB.
it as follows?
• with the control panel power switch ON, changing from 0 to 5 V
If the wiring is normal, replace the reader controller PCB.
rected?
Replace the scanner motor (M5).
COPYRIGHT© 2001 CANON INC. 2000 2000 2000 2000 CANON iR105 REV.0 JULY 2001