FCX4000-UM-251-9370 7-53
7 DISASSEMBLY AND ASSEMBLY
7.5 MainBox
7.5.1 Main Board
How to detach the main board
(1) Detach the left top cover (Refer to the section 7.1.6.).
(2) Remove the two studs from the RS-232C I/F connector screws.
RS-232C I/F connector screw
(3) Disconnect all cables from the main board.
Main Board
M3L6 binding head screw
(4) Remove the four M3L6 binding head screws holding the main board, and then detach the main board
from the main box.
(5) Remove the studs from the main board.
Stud
How to reinstall the main board
(1) Reattach the main board in the reverse order in which it was detached.
(2) Adjust the electrical adjustment (See section 8).