Lexmark 10G1664 - T 634dtnf B/W Laser Printer Service Manual page 213

4.
Remove the five system board mounting screws (A).
5.
Remove the USB screw (B)
B
6.
Remove the system board.
7.
Remove the communications board mounting screw (C).
D(201)
8.
Remove the communications board shield mounting screw (D).
9.
The communications board is held in place by a ground clip (E) that attaches the
communications board shield to the side frame. Pull the board up to unclip the shield.
10.
For the non-network system board, remove the two screws that hold the shield to the
communications board.
Note: Retain the shield and any screws to install on the new board.
A(232)
E
C(232)
A(102)
Repair information
4060-xxx
4-59