Inner Insulation Film, High-Voltage Power Supply Pcb, Engine Pcb, And 2Nd Cassette Relay Pcb - Brother MFC8500 Service Manual

1.23 Inner Insulation Film, High-voltage Power Supply PCB, Engine PCB, and 2nd Cassette Relay
PCB*
(*Provided on models available with a 2nd paper cassette)
(1) Remove screw "a" and take off the inner insulation film.
(2) Remove three screws (two "b" and one "c") from the high-voltage power supply PCB and
engine PCB.
(3) Slightly lift up the high-voltage power supply PCB and disconnect it from the engine PCB.
(4) Pull the spring up and out.
(5) Slightly hold up the engine PCB and disconnect the following harnesses:
• Toner sensor (light-receiver) harness (3-pin, P1)
• Main-LV-engine harness (2-pin, P15)
• 2nd cassette relay harness* (8-pin, P8)
• Heater thermistor harness (2-pin, P6), if the heat-fixing unit has not been removed
• Fan harness (2-pin, P7), if the fan has not been removed
• Toner sensor (LED) harness (4-pin, P10)
• Main motor harness (6-pin, P9)
• Polygon motor harness (5-pin, P12)
• Solenoid harness (2-pin, P13)
"a," "b," and "c": Taptite, bind B M4x12
IV - 56
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