Replacing The Main Board - GRAPHTEC midi LOGGER GL350 Service Manual

3.3 Replacing the Main Board

Disassembly
(1) Remove the input terminal unit from the GL450/400/350 (See Section 3.2.).
(2) Remove the M3L30 binding head screw and the four M3L10 self tapping screws from the bottom cover.
(3) Release the top cover hook from the bottom case, and then remove the top cover assembly (GL450/400)
or the top cover (GL350).
NOTE:
Take care with the flexible cable connecting the top cover assembly and the bottom case assembly when you are
removing the top cover assembly for the GL450/400.
(4) Disconnect the flexible cable from the main board for the GL450/400.
GL450/400
Top cover assembly
M3L30 binding
head screw
GL400-UM-251-9370
3. DISASSEMBLY AND REASSEMBLY
M3L10 self tapping screw
3-3
Hook
Bottom case assembly