Saddle Stitcher Unit - Toshiba MJ-1027 Service Manual

CHAPTER 6 TROUBLESHOOTING
B.

Saddle Stitcher Unit

1. Faulty paper positioning plate
Cause
Paper positioning plate
home position sensor
(PI7S)
Saddle stitcher controller
PCB
Paper positioning plate
motor (M4S)
Saddle stitcher controller
PCB
2. Faulty paper folding motor
Cause
Paper folding motor
clock sensor (PI4S)
Paper folding home
position sensor (PI21S)
Saddle stitcher controller
PCB
Paper folding motor
(M2S)
Saddle stitcher controller
PCB
6-32
Step Checks
1 Check the paper positioning
plate home position sensor. Is
the sensor normal?
2 Do the paper positioning
plates operate at a specific
timing?
3 Replace the paper positioning
plate motor. Is the problem
corrected?
Step Checks
1 Check the paper folding
motor clock sensor. Is the
sensor normal?
2 Check the paper folding home
position sensor. Is the sensor
normal?
3 Does the paper folding motor
operate at a specific timing?
4 Replace the paper folding
motor. Is the problem
corrected?
Yes/No Action
No Replace the sensor.
Yes Replace the saddle
stitcher controller
PCB.
No Check the positioning
plate drive
mechanism. If a fault
is found, correct it.
Otherwise, go to step
3.
Yes End.
No Replace the saddle
stitcher controller
PCB.
Yes/No Action
No Replace the sensor.
No Replace the sensor.
Yes Replace the saddle
stitcher controller
PCB.
No Check the paper
folding roller drive
mechanism. If a fault
is found, correct it.
Otherwise, go to step
4.
Yes End.
No Replace the saddle
stitcher controller
PCB.