Brother HL 1240 - B/W Laser Printer Service Manual page 90

CHAPTER 4 DISASSEMBLY AND RE-ASSEMBLY
3.11 Main PCB ASSY
(1) Remove the two M3x8 screws from the I/F plate to release the main PCB.
(2) Lift the insulation sheet and remove the main PCB ASSY.
(3) Disconnect the three connectors for the low-voltage power supply, engine PCB and LD.
3.12 Lower Tray Relay PCB ASSY (For HL-1250 only)
(1) Remove the M3x6 Taptite screw and remove the lower tray relay PCB ASSY.
Insulation sheet
Screw M3x8
Main PCB
LD connector
Engine PCB connector
I/F plate
Fig. 4-46
Main frame
Lower tray relay PCB ASSY
Fig. 4-47
4-26
Low-voltage power supply connector
Taptite, cup M3x6
Lower tray relay
PCB ASSY