Sharp AR-F15 Service Manual page 244

CHAPTER 7 TROUBLESHOOTING
5. Faulty height sensor (adjustment)
Cause
Adjustment
Wiring
Power supply
Height sensor (PS1)
6. Faulty back-up RAM
Cause
Finisher controller
PCB, punch drive PCB
7. Faulty delivery motor
Cause
Deliver roller
Delivery motor clock
sensor (PI10)
Finisher controller PCB
7-30
Step Checks
1 Try making adjustments using
the DIP switch once again. Is
the problem corrected?
2 Is the wiring between the
finisher controller PCB and
sensors normal?
3 Measure the voltage
between J6-2 (+) and J6-4
(−) on the finisher controller
PCB. Is it 5 VDC?
Step Checks
1 Turn the host machine OFF
then ON. Is the problem
corrected?
2 Replace the finisher controller
PCB and punch driver PCB. Is
the problem corrected?
Step Checks
1 Turn the delivery roller by hand.
Does it turn smoothly?
2 Check the delivery motor clock
sensor. Is the sensor normal?
3 Does the voltage between J11-4
and J11-5 on the finisher
controller PCB change to 24
VDC as soon as the delivery
motor starts to rotate?
Yes/No Action
Yes End.
No Correct the wiring.
No Replace the finisher
controller PCB.
Yes Replace the height
sensor.
Yes/No Action
Yes End.
Yes End.
Yes/No Action
No Correct mechanical
operation.
No Replace the sensor.
No Replace the finisher
controller PCB.
Yes Check the wiring
from the motor to the
controller PCB. If
normal, replace the
motor.