Brother LX-200 Service Manual page 125

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 P14 to P17 and is driven by the DC motor control driver #4.
The two switches are detected by ports P53 and P54. The operation of the DC
motor for each control port status is listed in Table 5.5-1. The DC motor current limit
value can be switched by port P14 (DC-IL).
P17 (IN1)
High
Low
Low
Low
Table 5.5-1 DC Motor Control
P16 (IN2) P15 (ENA)
Low
High
Low
Low
Fig. 5.5-5 X-cutter Motor Drive Circuit
5-17
DC Motor Drive
High TURN RIGHT
High TURN LEFT
High BRAKE
Low OFF