Brother HL 1240 - B/W Laser Printer Service Manual page 79

3.9 Fixing Unit
(1) Place the main frame on its base so that the rear side is facing you.
(2) Press the two hooks inwards to remove gear 59.
(3) Disconnect the two connectors of the heater harness and release the harness from the
hooks on the top of the fixing unit.
(4) Remove the one M3x8 Taptite screw and two shoulder screws securing the fixing unit,
taking care not to lose the contact spring fitted to the front left hand should screw position.
Shoulder screw
Main frame
Fixing unit
NOTE:
When re-assembling the fixing unit, ensure you do not forget to assemble gear 59.
(5) Lift up the fixing unit and move it toward you and to the left to allow the drive gear to clear
the frame and then disconnect the thermistor connector from the engine PCB.
(6) Remove the fixing unit from the main frame.
Engine PCB
Thermistor connector
Heater harness
Taptite, cup M3x8
connector
Fig. 4-28
Fig. 4-29
4-17
CHAPTER 4 DISASSEMBLY AND RE-ASSEMBLY
Gear 59
Gear 59
Heater harness
Main frame
Step (2)