Engine Control Board Pu - Brother MFC-9420CN Service Manual

5.1.46 Engine Control Board PU

Before disassembling the engine control board PU, read out the information in the NVRAM and
record it.
After replacing the engine control board PU, write the value which has been recorded into the
NVRAM.
(Refer to "6.2 IF YOU REPLACE THE ENGINE CONTROL BOARD
(1) Remove the setscrew (ST3x6, 3 pieces) of the shield cover (A).
(2) Remove the shield cover (A).
Shield cover (A)
(3) Disconnect all the connectors connecting to the engine controller board PU.
(4) Remove the setscrew (ST3x6, 5 pieces) of the engine controller board PU.
(5) Remove the engine control board PU from the frame.
ST3x6
Engine controller board PU
ST3x6
Frame
Fig. 5-92
Fig. 5-93
5 -5 7
PU".)
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