Toshiba MJ-1027 Service Manual page 203

11. Disconnected sensor connector (PI15S)
Cause
Paper pushing plate
home position top
position sensor (PI15S;
disconnected)
Wiring
Power supply
Ground
12. Faulty microswitch
Cause
Switch actuator
Inlet door switch
(MS1S)
Inlet cover sensor (PI9S)
Power supply, wiring
Step Checks
1 Are the connectors of the
paper pushing plate top
position sensor and the saddle
stitcher controller PCB
connected correctly?
2 Is the wiring between the
sensor and the saddle stitcher
broken?
3 Is 5 VDC present at J9-13 on
the saddle stitcher controller
PCB?
4 Is J9-14 on the saddle stitcher
controller PCB grounded
correctly?
Step Checks
1 Check the switch actuator of
the inlet door. Do the switch
and the sensor operate
correctly?
2 Check the inlet door switch. Is
the switch normal?
3 Measure the voltage at J10-8
on the saddle stitcher
controller PCB with the inlet
cover open. Is it 5 V?
4 Measure the voltage between
J19-1 (+) and J19-2 (−) on the
finisher controller PCB. Is it
24 V?
CHAPTER 6 TROUBLESHOOTING
Yes/No
No Connect the
connectors.
Yes Correct the wiring.
No Replace the saddle
stitcher controller
PCB.
No
Yes/No
No Correct the
mechanism.
No Replace the switch.
Yes The sensor is faulty.
Replace the sensor.
No Replace the finisher
controller PCB.
Yes Check the wiring
between J19 on the
finisher controller
PCB and J1 on the
saddle stitcher
controller PCB. If a
fault is found, correct
it. Otherwise, replace
the saddle stitcher
controller PCB.
Action
Action
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