Power Supply; Engine Pcb - Brother MFC8440D Service Manual

7/13/2019
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
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Brother 8840D Service Manual
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
•
APPENDIX 4.9 and 4.10 'ENGINE PCB
in this manual.
DCP-8040/MFC-8440
3-10
DCP-8045D/8045DN
MFC-8840D/8840DN
: Built-in : Not built-in
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