Brother MFC-8220 - Engine PCB

CHAPTER 3 THEORY OF OPERATION
3-10
1.4 Engine PCB
The gate array which transforms the serial signal from the main PCB into the parallel signal is
mounted on the engine PCB.
The engine PCB controls the following parts by using the transferred signal data;
• Main motor
• Solenoid
• Fan motor
• Upper cassette sensor
• Thermistor
• Lower cassette sensor
• Polygon motor • Upper paper exist sensor
• High-voltage power supply • Lower paper exist sensor
• Toner sensor • Lower cassette exist sensor
• Cover sensor • Paper eject sensor
• Front regist sensor • Fixing unit cover sensor
• Rear regist sensor
For the circuit diagram of the engine PCB, see APPENDIX 4.7 and 4.8 ‘ENGINE PCB
CIRCUIT DIAGRAM’ in this manual.
Sensor configuration varies according to machine types.
MFC-8220
Upper cassette sensor
Upper paper exit sensor
: Built-in : Not built-in