Engine Pcb - Brother mfc8440 Service Manual

CHAPTER 3 THEORY OF OPERATION
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
• Fan motor
• Thermistor
• Polygon motor
• High-voltage power supply
• Toner sensor
Cover sensor
•
• Front registration sensor
Rear registration sensor
•
For the circuit diagram of the engine PCB, see
CIRCUIT DIAGRAM'
Sensor configuration varies according to machine types.
Upper cassette sensor
Upper paper exit sensor
Multi-purpose tray paper exit sensor
DX sensor
DX paper select sensor
• Solenoid
• Upper cassette sensor
• Lower cassette sensor
• Upper paper exist sensor
• Lower paper exist sensor
• Lower cassette exist sensor
Paper eject sensor
•
• Fixing unit cover sensor
Multi-purpose tray paper exit sensor
•
in this manual.
DCP-8040/MFC-8440
3-10
APPENDIX 4.9 and 4.10 'ENGINE PCB
DCP-8045D/8045DN
MFC-8840D/8840DN
: Built-in : Not built-in