Toshiba MJ-1104 Service Manual page 62

[L] Stapler motor drive circuit
The stapler motor drive circuit controls the rotation and stoppage, rotational direction and motor current
of the stapler motor.
The stapler motor is a DC motor which is driven by rotation control signals (DM3-CNT1 and DM3-
CNT0) from the CPU of the finisher control PC board, and thus this motor performs a stapling opera-
tion. For the case when an overcurrent status is detected, a protection circuit is mounted to turn the sta-
pler motor off.
DM3-CNT0 DM3-CNT1
H L
L H
H H
L L
Finisher control PC board
DM3-CNT0
DM3-CNT1
IC21
CPU
[M] Reset circuit
The reset circuit generates a reset signal when the power is turned ON and when the power supply
voltage is lowered. When 5VPA voltage is 4.25V or lower, the reset IC (IC22) resets the CPU (IC21)
and Flash ROM (IC4) by determining that the output of pin 1 is at a low level.
MJ-1103/1104
DESCRIPTION OF OPERATIONS
Motor rotation
Normal Operates the stapler.
Reverse Recovery operation
Stop
Stop
5VPA VM
Motor drive circuit
Overcurrent
protection circuit
Fig. 3-39
5VPA
2
1
IC22
5
SG
Fig. 3-40
3 - 34
Remarks
DM3-F
DM3-R
RESET
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Stapler motor
(M13)