Dc Motor (Cutter Motor) Drive Circuit - Brother PT-9200DX Service Manual

3.2.5

DC Motor (Cutter Motor) Drive Circuit

Figs. 3.2-5 and 3.2-6 show the DC motor drive circuit and the cutter sensor circuit,
respectively.
The DC motor performs the full or half cutting of the tape. With full cutting, drive
pulses are transmitted from DCR1 and DCF1 of the CPU (#1) to BA6919FP (#7) to
drive the motor. With half cutting, drive pulses are transmitted from DCR2 and
DCF2 of the CPU (#1) to BA6919FP (#8) to drive the motor.
Table 3.2-1 shows the logic of DCR1, DCF1, DCR2, and DCF2.
Fig. 3.2-5 DC Motor Drive Circuit
Fig. 3.2-6 Cutter Sensor Circuit
State
OFF
Clockwise
Counterclockwise
Brake
Table 3.2-1 Logic of the DC Motor Control
DCF1 DCR1
0 0
1 0
0 1
1 1
III - 8
DCF2 DCR2
0 0
1 0
0 1
1 1