Canon FINISHER - D1 Service Manual page 172

CHAPTER 5 TROUBLESHOOTING
11. E542 (tray B upper position sensor PI20; at power-on)
Cause
Tray position
Tray B upper position
sensor (PI20)
12. E542 (tray B lift motor M12; during operation)
Cause
36 VDC power supply
Tray lifter mechanism
Tray B lifter motor (M12)
Tray B lock sensor (PI23)
Tray B upper position
sensor (PI20), Tray B
lower position sensor
(PI21)
5-36
COPYRIGHT © 1999 CANON INC.
Step Checks
1 Is tray B above the tray B
paper sensor PCB (S4)?
2 Is the tray B upper position
sensor (PI20) normal?
Step Checks
1 Is 36 VDC supplied to J114-
1 on the finisher controller
PCB?
2 Is there a fault or an obstacle
in the tray lifter mechanism?
3 Does the tray lifter motor
rotate at the correct timing?
4 Is the tray B lock sensor
normal?
5 Is the tray B upper position
sensor and the lower position
sensor normal?
CANON FINISHER - D1 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
Yes/No Action
Yes Lower the tray under the
sensor.
No Check the wiring from the
finisher controller PCB to
the sensor; if normal,
replace the sensor.
Yes Replace the finisher
controller PCB.
Yes/No Action
No Check the supply path of
the 36 VDC; if faulty,
correct it.
Yes Remove the fault or the
obstacle.
No Replace the tray B lifter
motor driver PCB.
No Replace the sensor.
Yes Replace the appropriate
sensor.
No Replace the finisher
controller PCB.