Toshiba MJ-1104 Service Manual page 65

[C] Front / Rear saddle stapler motor drive circuit
The front / rear saddle stapler motor drive circuit controls the rotation and stoppage, rotational direction
and motor current of the front / rear saddle stapler motor.
The front saddle stapler motor is a DC motor which is driven by rotation control signals (DM2-CNT1 and
DM2-CNT0) from the CPU of the saddle control PC board, and thus this motor performs a stapling
operation of the front saddle stapler.
DM2-CNT1 DM2-CNT0
L H
H L
H H
L L
The rear saddle stapler motor is a DC motor which is driven by rotation control signals (DM3-CNT1 and
DM3-CNT0) from the CPU of the saddle control PC board, and thus this motor performs a stapling
operation of the rear saddle stapler.
DM3-CNT1 DM3-CNT0
L H
H L
H H
L L
For the case when an overcurrent status is detected, a protection circuit is mounted to turn the front /
rear saddle stapler motor off.
Saddle control PC board
DM2/3-CNT0
DM2/3-CNT1
IC31
CPU
© 2008, 2009 TOSHIBA TEC CORPORATION All rights reserved
Motor rotation
Normal Operates the stapler.
Reverse Initial operation
(Only when the stapler operates abnormally.)
Stop
Stop
Motor rotation
Normal Operates the stapler.
Reverse Initial operation
(Only when the stapler operates abnormally.)
Stop
Stop
5VPA VM
Motor drive circuit
Overcurrent
protection circuit
Fig. 3-43
3 - 37
Remarks
Remarks
DM2/3-F
Front saddle
stapler motor
(M18)
Rear saddle
DM2/3-R
stapler motor
(M19)
DESCRIPTION OF OPERATIONS
3
MJ-1103/1104