Main Pcb Assy - Brother HL-1110 Service Manual

7.10 Main PCB ASSY

(1) Remove the bottom of the main PCB insulation sheet and peel it.
(2) Disconnect all harnesses and flat cables from the main PCB ASSY.
(3) Remove the three taptite cup S M3x6 SR screws to remove the ground harness, the
main PCB ASSY, and the main PCB insulation sheet from the machine.
Main PCB ASSY
Low voltage PCB harness
Polygon motor harness
Ground harness
Taptite cup S M3x6 SR
Motor encoder
PCB flat cable
Laser unit flat cable
Paper feed/paper printing position sensor PCB harness
Harness routing: Refer to
Note:
• Make sure that the main PCB ASSY is secured by screws when connecting or
disconnecting harnesses and flat cables.
• After disconnecting flat cables, check that each cable is not damaged at its end or short-
circuited. When connecting flat cables, do not insert them at an angle. After insertion,
check that the cables are not at an angle.
Assembling Note:
• Insert the main PCB insulation sheet into the gap between the USB connector and the
main shield plate.
• Attach the main PCB insulation sheet and the main PCB ASSY in the order as shown in
the figure above.
• After the assembly, refer to
to configure each setting.
USB connector
Main PCB ASSY
"1. Main PCB ASSY / low voltage power supply PCB unit / fuser
"1. IF YOU REPLACE THE MAIN PCB ASSY" in chapter 3
Main shield plate
Taptite cup S M3x6 SR
Fig. 2-18
2-20
Main PCB insulation sheet
Main PCB
insulation sheet
unit".
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