Brother HL-L9300CDW Service Manual page 196

(6) Disconnect the Key PCB flat cable from the Key PCB ASSY.
Key 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.
Key PCB flat cable
Fig. 3-59
3-55
CN1
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