Brother LX-200 Service Manual page 116

Specification Switching Circuit
This circuit reads the specification switching information.
The specification switching is conducted by a ROM program built into the main CPU
according to the solder point settings on the PCB.
The relationships between the solder points and specifications are shown in PART
LIST.
Detector Circuits
These circuits detect the status of the switches and buttons that operate the unit
(Power switch, Cut button, Feed button, Start button, and dial switches) and the
sensors that determine the film type, document length and width, and cover
open/closed status.
Motor Drive Circuits
These circuits convert the motor control signals output from the main CPU output
ports to 24 V drive signals and supplies these voltage signals to each motor.
Power Supply Circuits
These circuits convert the unstabilized DC power supply input from the Jack PCB
into a stabilized +5V DC power supply for the logic ICs, including the main CPU, and
into a stabilized +24V DC power supply to drive the motors.
Fig. 5.3-6 Specification Switching Circuit
5-8