Fault In Communication With Host Machine; Fault In Communication With Saddle Stitcher Unit; Troubleshooting; Finisher Unit - Sharp AR-FN8 Service Manual

CHAPTER 7 TROUBLESHOOTING
IV. TROUBLESHOOTING
A.

Finisher Unit

1.

Fault in communication with host machine

Cause
Finisher controller PCB,
Host machine DC
controller PCB
Wiring
Finisher controller PCB,
Host machine DC
controller PCB
2.

Fault in communication with saddle stitcher unit

Cause
Finisher controller PCB,
Saddle stitcher controller
PCB
Wiring
Power supply
Saddle stitcher controller
PCB
7-32
Step Checks
1 Turn the host machine OFF,
then ON. Is the problem
corrected?
2 Is the wiring between the
finisher controller PCB and
the host machine controller
PCB normal?
3 Replace the finisher controller
PCB and the host machine DC
controller PCB. Is the problem
corrected?
Step Checks
1 Turn the host machine OFF,
then ON. Is the problem
corrected?
2 Is the wiring between the
finisher controller PCB and
the saddle stitcher controller
PCB normal?
3 Measure the voltage between
J3-2 (+) and J3-1 (−) on the
finisher controller PCB. Is it
24 VDC?
Yes/No Action
Yes End.
No Correct it.
Yes End.
Yes/No Action
Yes End.
No Correct it.
No Replace the finisher
controller PCB.
Yes Replace the saddle
stitcher controller
PCB.