JVC RX-8040B Service Manual page 13

3.15 Removing the power supply board
(See Fig.17)
• Prior to performing the following procedures, remove the top
cover.
(1) From the top side of the main body, disconnect the parallel
wire from the connector
board 1.
(2) Disconnect the card wire from the connector
power supply board.
(3) Disconnect the relay board from the connector
the power supply board.
(4) Remove the three screws W attaching the power supply
board.
(5) Remove the power supply board from the hook f of the
chassis base bracket in the direction of the arrow, and take
out the power supply board.
(6) Turn over the power supply board, and remove the solders
from the soldered sections g attaching the wire.
3.16 Removing the headphone jack board
(See Figs.17 and 18)
• Prior to performing the following procedures, remove the top
cover, rear panel, I/O board and front panel assembly.
(1) From the top side of the main body, disconnect the parallel
wire from the connector
Fig.17)
(2) From the front side of the main body, remove the nut h and
screw X attaching the headphone bracket to the front
bracket. (See Fig.18)
(3) Remove the three screws W attaching the power supply
board. (See Fig.17)
(4) Take out the headphone jack board from the inside of the
chassis base while lifting the power supply board.
3.17 Removing the switch board
(See Fig.19)
• Prior to performing the following procedures, remove the top
cover, rear panel, I/O board and front panel assembly.
(1) From the back side of the front panel assembly, remove the
two screws Y attaching the switch board.
(2) Take out the switch board, and disconnect the wire from
the connector CN432 on the switch board.
3.18 Removing the power switch board
(See Fig.19)
• Prior to performing the following procedures, remove the top
cover, rear panel, I/O board and front panel assembly.
(1) From the back side of the front panel assembly, remove the
two screws Z attaching the power switch board.
(2) Take out the power switch board, and disconnect the wire
from the connector CN430
CN55 on the power transformer
CN402 on the
CN71
CN881 on the main board. (See
on the power switch board.
Power supply board
on
CN881 CN402 CN71
Main board
Nut h
Headphone bracket
CN432
Y
Y
Switch board Front video board
Card wire Headphone
jack board
Tie band
W
CN55
W
Soldered
sections g
W
Power
transformer
board 1
Relay board Hook f
Fig.17
X
Headphone jack board
Front bracket
Fig.18
Front panel assembly CN430
Power switch board
Fig.19
(No.MB303)1-13
Z