JVC RX-D301S Service Manual page 18

3.1.25 Removing the regulator board
(See Fig.21)
• Remove the top cover, tuner, front video board, DCDC control
board, PWM modulation 1 board, PWM modulation 2 board,
volume board, OSD connect 1 board, master clock board and
main amplifier board.
(1) From the forward side of the main amplifier board, discon-
nect the wire from the connector CN105.
(2) Remove the two screws AB attaching the regulator board.
(3) Remove the regulator board and disconnect the parallel
wire from the connector
board.
3.1.26 Removing the heat sink
(See Fig.22)
• Remove the top cover, tuner, front video board, DCDC control
board, PWM modulation 1 board, PWM modulation 2 board,
volume board, OSD connect 1 board, master clock board,
main amplifier board and regulator board.
(1) From the forward side of the main amplifier board, remove
the screw AC and remove the wire holder board with the
wires.
(2) Remove the five screws AD to remove the heat sink.
1-18 (No.MB479)
CN104 on the main amplifier
Main amplifier board
Regulator board
CN105
AB
Fig.21
Wire holder board
Heat sink
AD
Main amplifier board
Fig.22
CN104
AC
AD