[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

Motor rotation

Remarks

 

 

 

 

H

L

Normal

Operates the stapler.

 

 

 

 

L

H

Reverse

Recovery operation

 

 

 

 

H

H

Stop

 

 

 

 

 

L

L

Stop

 

 

 

 

 

Finisher control PC board

 

 

 

 

 

 

5VPA

VM

 

 

 

DM3-CNT0

 

 

 

DM3-F

 

 

 

 

 

 

DM3-CNT1

Motor drive circuit

CN19

 

Stapler motor

IC21

 

 

DM3-R

(M13)

 

 

 

 

 

CPU

 

 

 

 

 

 

Overcurrent

 

 

 

 

protection circuit

 

 

 

 

 

Fig. 3-39

 

 

 

[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.

5VPA

2

5

SG

IC22

1

RESET

 

Fig. 3-40

MJ-1103/1104

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DESCRIPTION OF OPERATIONS

 

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Toshiba MJ-1104, MJ-1103 service manual Stapler motor drive circuit, Reset circuit, Recovery operation, IC22