Brother International HL 1240 Service Manual - Page 93

CHAPTER 4 DISASSEMBLY AND RE-ASSEMBLY (5) Disconnect the 11 (eleven) connectors for HL-1240 or 12 (twelve) connectors for HL-1250 from the engine PCB to remove the engine PCB ASSY. Toner sensor (light reception) connector Low-voltage power supply connector (for HVPS) Main PCB connector Low-voltage power supply connector Engine PCB ASSY Thermistor connector Fan motor connector Toner sensor (light emission) connector Polygon motor connector Solenoid connector Main motor connector Panel PCB Lower paper cassette connector connector (HL-1250 only) Fig. 4-51 ! CAUTION: Even if you want to remove only one of either the engine and high-voltage power supply PCBs, ensure you remove all screws securing both PCBs and disconnect the central connector while lifting both of them up. Failure to do may damage the PCBs. When re-assembling the engine PCB, ensure it is aligned with the positioning boss first. Be careful the main motor harness is not caught between the engine PCB and the frame. When re-assembling the engine PCB or high-voltage power supply PCB, ensure the central connector is connected correctly. 4-29