Main Pcb Assy - Brother DCP-L8400CDN Service Manual

9.46 Main PCB ASSY

Note: Backup of machine information
Before starting disassembly work, back up the machine information and user setting
information.
(Refer to "1.3.13 Backup of machine information (Function code 41)" in Chapter
After replacing the PCB, restore the backup data to a new PCB.
(1) Disconnect the twenty five Connectors (CN2, CN3, CN4, CN5, CN6, CN8, CN9, CN10,
CN12, CN13, CN14, CN15, CN16, CN17, CN18, CN19, CN21, CN30, CN40, CN42,
CN43, CN44, CN46, CN47 and CN49) and three Flat cables (CN7, CN31 and CN45) from
the Main PCB ASSY.
Note:
- 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.
Main PCB ASSY
CN33
CN38 CN37
CN32
CN41
CN39
CN42
CN43
CN44
CN46
CN47
CN40
CN45
Fig. 3-187
3-137
CN28 CN20
CN27
CN2
CN3
CN5 CN4
CN6
CN49
CN7
CN21
CN8
CN10
CN12
CN11
CN9
CN22 CN13
CN14
CN15
CN16
CN26
CN17
CN18
CN19
CN30 CN31
5.)
Confidential