Engine Pcb - Brother FAX4759 Service Manual

3.3

Engine PCB

On the engine PCB is a gate array which converts serial signals sent from the main PCB into
parallel signals. According to those signals, the engine PCB controls the following:
- Motors--main motor, fan motor, and polygon motor
- High-voltage power supply
- Solenoid(s)
- Heater
- Heater thermistor
- Sensors--cover sensor, toner sensor, manual insertion sensor, registration sensor(s), and
cassette sensor(s)
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