1-14 (No.MB303)
3.19 Removing the front key & system control board, front video board
(See Figs.20 to 23)
• Prior to performing the following procedures, remove the top
cover, rear panel, I/O board, front panel assembly, switch
board and power switch board.
(1) From the front side of the front panel assembly, pull out the
volume and jog knobs, and remove the nut
i
attaching the
front key & system control board. (See Fig.20)
(2) From the back side of the front panel assembly, remove the
eight screws
AA
attaching the sub panel assembly. (See
Fig.21)
(3) Remove the wires of the front video board from the hook
j
of the front panel assembly in the direction of the arrow 1.
(See Fig.21)
(4) Remove the sub panel assembly while releasing the four
claws
k
in the direction of the arrow 2. (See Figs.21 and 22)
(5) From the front side of the front panel assembly, disconnect
the wire from the connector
CN412
on the front key & sys-
tem control board, and take out the front video board. (See
Fig.23)
(6) Remove the claws
m
attaching the front key & system con-
trol board in the direction of the arrow and take out the front
key & system control board. (See Fig.23)
Fig.20
Fig.21
Fig.22
Fig.23
Volume knob
Nut
i
Front panel assembly
Jog knob
AA
AA
Claw
k
Claw
k
Claw
k
Hook
j
Front panel assembly
Sub panel assembly
Front video board
2
2
1
2
2
Claw
k
Sub panel assembly
Front panel assembly
Front key & System control board
Front video board
Front panel assembly
Claw
m
Claw
m
CN412
