Main Pcb Assy; Lower Tray Relay Pcb Assy (For Hl-1250/1270N Only) - Brother 1240 Service Manual

3.12 Main PCB ASSY

NOTE: For HL-1250/1270N only
Ensure that any installed SIMM memory is removed BEFORE removing the main PCB.
(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.
Insulation sheet

3.13 Lower Tray Relay PCB ASSY (for HL-1250/1270N only)

(1) Remove the M3x6 Taptite screw and remove the lower tray relay PCB ASSY.
Main PCB
Screw M3x8
Fig. 4-51
Fig. 4-52
4-29
CHAPTER 4 DISASSEMBLY AND RE-ASSEMBLY
LD connector
Engine PCB connector
Low-voltage power supply connector
I/F plate
Main frame
Lower tray relay PCB ASSY
Taptite, cup M3x6
Lower tray relay
PCB ASSY