GRAPHTEC FC 4500 Series Service Manual page 67

6 REPLACEMENT PROCEDURES
(6) Open the bottom chassis full.
M3L6 binding head screw
Main board
(7) Remove the six M3L6 binding head screws holding the main board.
(8) Detach the main board from bottom chassis.
How to install the Main Board
(1) Reattach the Main Board in the reverse order in which it was detached.
(2) Perform the adjustment item (See section 7.2.).
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