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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
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
ter board.
(8) Disconnect the wire from the connector
board(L).
(9) Disconnect the wire from the connector
round back board.
(10) Disconnect the wire from the connector
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.
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)
Front board(R)
Tie band
CN811
on the pow-
Wire
protection
board
Card wire
CN722
on the cen-
Main
CN714
on the front
board
CN717
on the sur-
CN723
CN719
on the front
CN814
Micon board
P
Heat sink
Front board(L)
Surround board
Center board
CN881
Tie
band
CN717
M
M
L
N
N
CN719
CN831
CN813
CN714
Fig.9
Heat sink
CN704 CN702
CN701
CN703
Fig.10
Fig.11
L
CN71
CN811
Power
supply
board
Power
transformer
board 1
Tie bands
Relay
board
K
CN81
CN722
Main board
P
CN706
CN705
Q
Q
(No.MB172)1-9
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