Brother HLL3290CDW Service Manual page 263

(4) Disconnect the Speaker harness from the Main PCB, and release it from the securing
fixtures.
(5) Remove the Screw cup M3x8 (black) screw to release the Modem ground wire L from the
securing fixtures.
(6) Disconnect the LED control flat cable from the Main PCB. Remove the LED control flat
cable from the Double-sided tape on the FFC guide and then release it from the securing
fixtures.
(7) Disconnect the NFC flat cable from the Main PCB. Release each Hook to remove the Flat
core. Remove the NFC flat cable from the Double-sided tape to release it from the
securing fixtures.
Harness routing: Refer to
the machine (Modem
Main PCB
Fig. 3-55
Hooks
Main PCB
Fig. 3-56
"7. Left side of the machine (LED unit, NFC
unit), 10. Main PCB, Cartridge sensor relay
3-72
Speaker harness
Modem ground wire L
Screw cup M3x8 (black)
Flat core
NFC flat cable
LED control flat cable
PCB), 8. Left side of
PCB".
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