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OPTIONAL ACCESSORIES
15-2
MFC 4550/6550MC/7550MC
OP-US-5.0
Maintenance
4. To install the serial interface board
onto the main controller board, plug
the board serial interface board into
the upper left connectors on the
main controller board.
5. Secure the serial interface board
with the two screws.
Warning
• Hold the edge of the serial interface board. Do not touch the surface of the board.
• Make sure the serial interface board is securely seated on the main controller board.
3. Unscrew the two screws and remove
the option slot cover plate and keep
it in a safe place.
LINE
EXT.
Connector
Serial interface board
Main controller board
Screw
6. Reinstall the main controller board
in the MFC by sliding it into the
guide rails.
7. Secure the main controller board
with the three screws.
LINE
EXT.
Main controller boardScrew
LINE
EXT.
Screw
Option slot cover plate