(No.MB502)1-11
3.11 Removing the center amp. board, front amp. boards (L/R) and rear amp. boards (L/R)
(See Figs.12 and 14)
• Prior to performing the following procedure, remove the top
cover, stay bracket and main board.
(1) Remove the ten screws
Q
attaching the heat sink of the
main board. (See Fig.12)
(2) Disconnect the center amp. board from the connector
CN321
on the main board. (See Fig.14)
(3) Disconnect the front amp. board (L) from the connector
CN311
on the main board. (See Fig.14)
(4) Disconnect the front amp. board (R) from the connector
CN312
on the main board. (See Fig.14)
(5) Disconnect the rear amp. board (L) from the connector
CN331
on the main board. (See Fig.14)
(6) Disconnect the rear amp. board (R) from the connector
CN332
on the main board. (See Fig.14)
Fig.14
3.12 Removing the power transformer
(See Fig.15)
• Prior to performing the following procedure, remove the top
cover and stay bracket.
(1) From the top side of the main body, remove the solders
from the soldered section
c
on the power transformer
board 1.
(2) Remove the solders from the soldered sections
d
on the
power transformer board 2.
(3) Disconnect the wire from the connector
CN251
on the pow-
er transformer board 1.
(4) Remove the four screws
S
attaching the power transform-
er.
3.13 Removing the power/fuse board
(See Fig.15)
• Prior to performing the following procedure, remove the top
cover and stay bracket.
(1) From the back and top sides of the main body, remove the
screw
T
and screw
U
attaching the power/fuse board.
(2) Remove the solders from the soldered sections
e
attaching
the power cord.
(3) From the reverse side of the power/fuse board, remove the
solders from the soldered sections
f
attaching the wires.
Fig.15
3.14 Removing the power supply board
(See Fig.16)
• Prior to performing the following procedure, remove the top
cover and stay bracket.
(1) From the top side of the main body, disconnect the parallel
wires from the connectors
CN203
and
CN241
on the power
supply board.
(2) Disconnect the card wire from the connector
CN201
on the
power supply board.
(3) Disconnect the relay board from the connector
CN291
on
the power supply board.
(4) Disconnect the parallel wire from the connector
CN101
on
the headphone jack board.
(5) Remove the solders from the soldered section
c
on the
power transformer board 1.
Rear amp.
board (R)
Front amp.
board (R)
Center amp.
board
Rear amp.
board (L)
Front amp.
board (L)
CN332
CN331 CN312
CN311 CN321
Main board
CN251
Soldered
section
c
Soldered
sections
d
Soldered
sections
e
Soldered
sections
f
Power
transformer
Power
transformer
board 2
Power cord
S
S
U
T
S
S
Power transformer board 1
Power/Fuse
board
