Read Sharp AR-F12 (serv.man8) Service Manual online
8-37
CHAPTER 8 TROUBLESHOOTING
14. Faulty swing motor (related to PI20)
15. Faulty tray 1 lift motor (related to PI8)
16. Faulty tray 2 lift motor (related to PI25)
Checks
Check the swing motor clock
sensor. Is the sensor normal?
sensor. Is the sensor normal?
Does the voltage of the
swing motor between J11-6
and -7 on the finisher
controller PCB reach 24 V at
a specific rotation timing?
swing motor between J11-6
and -7 on the finisher
controller PCB reach 24 V at
a specific rotation timing?
Cause
Swing motor clock
sensor (PI20)
sensor (PI20)
Finisher controller PCB
Step
1
2
Yes/No
No
No
Yes
Action
Replace the sensor.
Replace the finisher
controller PCB.
controller PCB.
Check the wiring
from the motor to the
finisher controller
PCB. If normal,
replace the motor.
from the motor to the
finisher controller
PCB. If normal,
replace the motor.
Checks
Check the tray 1 home
position sensor. Is it normal?
position sensor. Is it normal?
Check the tray 1 lift
mechanism. Is the
mechanism normal?
mechanism. Is the
mechanism normal?
Is the tray 1 lift motor supplied
with 24 VDC by the finisher
controller PCB as soon as the
tray is driven?
with 24 VDC by the finisher
controller PCB as soon as the
tray is driven?
Check the wiring from the
finisher controller PCB to
the tray 1 lift motor. Is the
wiring normal?
finisher controller PCB to
the tray 1 lift motor. Is the
wiring normal?
Cause
Tray 1 home position
sensor (PI8)
sensor (PI8)
Tray 1 lift mechanism
Finisher controller PCB
Wiring
Tray 1 lift motor (M5)
Step
1
2
3
4
Yes/No
No
No
No
No
Yes
Action
Replace the sensor.
Correct the
mechanism.
mechanism.
Replace the finisher
controller PCB.
controller PCB.
Correct the wiring.
Replace the tray 1 lift
motor.
motor.
Checks
Check the tray 2 lift
mechanism. Is the
mechanism normal?
mechanism. Is the
mechanism normal?
Is the tray 2 lift motor supplied
with 24 VDC by the finisher
controller PCB as soon as the
tray is driven?
with 24 VDC by the finisher
controller PCB as soon as the
tray is driven?
Check the wiring from the
finisher controller PCB to
the tray 2 lift motor. Is the
wiring normal?
finisher controller PCB to
the tray 2 lift motor. Is the
wiring normal?
Cause
Tray 2 lift mechanism
(PI25)
(PI25)
Finisher controller PCB
Wiring
Tray 2 lift motor (M10)
Step
1
2
3
Yes/No
No
No
No
Yes
Action
Correct the
mechanism.
mechanism.
Replace the finisher
controller PCB.
controller PCB.
Correct the wiring.
Replace the tray 2 lift
motor.
motor.
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