(No.MB170)1-9
3.8
Removing the main board
(See Fig.9)
• Prior to performing the following procedures, remove the top
cover.
(1) From the top side of the main body, remove the tie bands
bundling the wires.
(2) Remove the tie band and wire protection board bundling
the card wire.
(3) Disconnect the wire from the connector
CN811
on the pow-
er transformer board 1.
(4) Disconnect the relay board from the connectors (
CN71
,
CN81
) on the power supply board and micon board.
(5) Disconnect the parallel wires from the connectors (
CN831
,
CN881
) on the main board.
(6) Disconnect the wires from the connectors (
CN723
,
CN813
,
CN814
) on the main board.
(7) Disconnect the wire from the connector
CN722
on the cen-
ter board.
(8) Disconnect the wire from the connector
CN714
on the front
board(L).
(9) Disconnect the wire from the connector
CN717
on the sur-
round back board.
(10) Disconnect the wire from the connector
CN719
on the front
board(R).
(11) Remove the screw
K
, four screws
L
, two screws
M
and two
screws
N
attaching the main board.
(12) Take out the main board.
Fig.9
3.9
Removing the heat sink
(See Figs.10 and 11)
• Prior to performing the following procedures, remove the top
cover and main board.
(1) From the reverse side of the main board, remove the two
screws
P
attaching the main board to the heat sink. (See
Fig.10)
(2) Disconnect the connectors (
CN701
-
CN706
) on the main
board, remove the main board. (See Fig.10)
(3) Remove the twelve screws
Q
attaching the heat sink. (See
Fig.11)
Fig.10
Fig.11
Tie band
Wire
protection
board
Micon board
Card wire
Tie bands
CN811
Power
transformer
board 1
CN71
CN81
Relay
board
Power
supply
board
CN831
CN881
Main
board
CN723
CN814
CN813
Center board
CN722
Front board(L)
CN714
Surround board
CN717
Front board(R)
CN719
K
N
N
L
M
L
Tie
band
M
Heat sink
P
P
Main board
CN703
CN701
CN704 CN702
CN705
CN706
Heat sink
Q
Q
