Lexmark T656dne User Manual page 28

Additional printer setup
8
Lower the ISP toward the plastic tee until the ISP is seated between the guides of the plastic tee.
9
Insert the long thumbscrew and turn it clockwise enough to hold the ISP in place, but do not tighten the thumbscrew
at this time.
10
Attach the two provided screws to secure the ISP mounting bracket to the system board cage.
11
Tighten the long thumbscrew.
Note: Do not overtighten the thumbscrew.
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