12 main pcb assy -29, Low-voltage – Brother 1270N User Manual

Page 101

CHAPTER 4 DISASSEMBLY AND RE-ASSEMBLY

4-29

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.

Fig. 4-51

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.

Fig. 4-52

Taptite, cup M3x6

Lower tray relay
PCB ASSY

Lower tray relay PCB ASSY

Main frame

Screw M3x8

Insulation sheet

Main PCB

Low-voltage power supply connector

Engine PCB connector

LD connector

I/F plate

➀

➁