Engine Pcb - Brother DCP 8040 - B/W Laser - All-in-One 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