Brother MFC8420 Service Manual page 177

CHAPTER 4 DISASSEMBLY AND RE-ASSEMBLY
8
Speaker
Driver PCB ASSY
Main PCB
11 Rear cover sensor
Engine PCB
9
FFC / HP sensor / Scanning motor FB
Speaker
Scanning
motor FB
Driver PCB ASSY
Main PCB
12 Main PCB
Rear cover
sensor
Main PCB
Low-voltage PS
PCB ASSY
10
FFC
HP sensor
13
ADF motor
Engine PCB
Driver PCB
ASSY
4-96
Panel PCB
Panel
Main PCB
ADF motor / ADF relay PCB ASSY
ADF relay PCB ASSY
ADF
Main PCB