Sharp AR-F15 Service Manual page 250

CHAPTER 7 TROUBLESHOOTING
19. Faulty second feed motor (related to PI5)
Cause
Second feed motor
(M8)
Shutter mechanism
Shutter open detection
sensor (PI5)
Finisher controller PCB
20. Faulty second feed motor (related to MS4)
Cause
Second feed motor
(M8)
Shutter mechanism
Shutter closed detection
switch (MS4)
Finisher controller PCB
7-36
Step Checks
1 Does the second feed motor
in reverse at a specific
timing?
2 Are the shutter and the
shutter upper/lower bar
engaged correctly?
3 Turn the feed roller 2 in
reverse by hand. Does the
shutter upper/lower bar
move up/down?
4 Is the shutter open detection
sensor normal?
Step Checks
1 Does the second feed motor
rotate in reverse at a specific
timing?
2 Are the shutter and the
shutter upper/lower bar
engaged correctly?
3 Turn the feed roller 2 in
reverse by hand. Does the
shutter upper/lower bar
move up/down?
4 Is the shutter closed
detection switch normal?
Yes/No Action
No Replace the second
feed motor or the
finisher controller
PCB.
No Engage them
correctly.
No Correct mechanism
from the shutter upper/
lower bar to the gear of
the feed roller 2.
No Replace the sensor.
Yes Replace the finisher
controller PCB.
Yes/No Action
No Replace the second
feed motor or the
finisher controller
PCB.
No Engage them
correctly.
No Correct the
mechanism from the
shutter upper/lower
bar to the gear of the
feed roller 2.
No Replace the switch.
Yes Replace the finisher
controller PCB.