Toshiba MJ-1103, MJ-1104

DESCRIPTION OF OPERATIONS

3 - 34

[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.

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.

Fig. 3-40

DM3-CNT0 DM3-CNT1 Motor rotation Remarks

H L Normal Operates the stapler.

L H Reverse Recovery operation

HH Stop

LLStop

IC21

CPU

DM3-CNT0 DM3-F

VM5VPA

Stapler motor

(M13)

Motor drive circuit

Finisher control PC board

Overcurrent

protection circuit

DM3-R

DM3-CNT1

CN19

5VPA

IC22 RESET