Brother LX-300 Service Manual page 124

S
X-cutter Motor Drive Circuit
This circuit drives the DC motor with the +24V DC stabilized constant voltage.
The X-cutter comprises a DC motor and two switches. The DC motor is controlled
by the main CPU ports P64 to P67 and is driven by the DC motor control circuit.
The two switches are detected by ports P22 and P23. The operation of the DC
motor for each control port status is listed in Table 5.5-1.
P67
High
Low
High
Low
Table 5.5-1 DC Motor Control
P66 P65
Low Low
High High
Low High
Low Low
Fig. 5.5-5 X-cutter Motor Drive Circuit
5-18
P64 DC Motor Drive
High TURN LEFT
Low TURN RIGHT
Low BRAKE
Low OFF