Brother International DCP 8040 Service Manual - Page 66
Engine PCB
UPC - 012502610328
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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 • 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 registration sensor • Fixing unit cover sensor • Rear registration sensor • Multi-purpose tray paper exit sensor For the circuit diagram of the engine PCB, see APPENDIX 4.9 and 4.10 'ENGINE PCB CIRCUIT DIAGRAM' in this manual. Sensor configuration varies according to machine types. DCP-8040/MFC-8440 Upper cassette sensor Upper paper exit sensor Multi-purpose tray paper exit sensor DX sensor DX paper select sensor DCP-8045D/8045DN MFC-8840D/8840DN : Built-in : Not built-in 3-10