Brother MFC-9420CN - C. Troubleshooting and Routine Maintenance; Error Messages

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5.1.14 Main PCB
(1) Disconnect the two connectors from the main PCB.
(2) Remove the four screws (A) from the main PCB.
Fig. 5-56
(3) Disconnect the connector of the main PCB from the engine controller board.
Fig. 5-57
Screws (A)
Screws (A)
Main PCB
Speaker harness connecto
r
NCU harness ASSY connecto
r
Main PCB
Engine controller board