Engine Pcb Assy / High-Voltage Power Supply Pcb Assy - Brother HL 1240 - B/W Laser Printer Service Manual

CHAPTER 4 DISASSEMBLY AND RE-ASSEMBLY

3.14 Engine PCB ASSY / High-Voltage Power Supply PCB ASSY

(1) Remove the
(2) Remove the three
power supply PCB.
(3) Lift the engine PCB and high-voltage power supply PCB together and disconnect the
connector which connects two PCBs together to remove the high-voltage power supply
PCB ASSY.
(4) If necessary, remove the T/R electrode helical spring from the T/R plate.
Screw, bind M4x12
Engine PCB ASSY
T/R electrode
helical spring
Step (4)
T/R plate
!
CAUTION:
Be sure not to lose the T/R electrode helical spring after removing it.
NOTE:
When re-assembling the T/R electrode helical spring onto the plate, press the spring onto the
plate firmly with a flat bladed screwdriver and ensure that it is retained securely.
M4x12 Taptite screw to remove the insulation sheet.
M4x12 Taptite screws securing the engine PCB and the high-voltage
Screw, bind M4x12
Insulation sheet
Fig. 4-50
4-28
Step (3)
Screw, bind M4x12
High-voltage power
supply PCB ASSY
PR99153