JVC RX-F31S Service Manual page 12

3.1.20 Removing the main amplifier board
(See Figs.15 and 16)
• Remove the top cover, tuner, DSP board, master clock board,
gate drive-2 board, S.S. setup board, gate drive-1 board and
vol IC board.
(1) Remove the tie bands bundling the wires. (See Fig.15.)
Reference:
• After reassembling, bundle the wires with the new tie
bands as before. (See Fig.15.)
• After reassembling, fix the support board with the new
tie bands as before. (See Fig.15.)
(2) Disconnect the parallel wires from the connectors (CN701,
CN801) on the speaker terminal board. (See Fig.15.)
(3) Disconnect the parallel wire from the connector
the speaker relay board. (See Fig.15.)
(4) Disconnect the parallel wire from the connector
the input mother board. (See Fig.15.)
(5) Disconnect the wires from the connectors (CN530, CN540)
on the input mother board. (See Fig.15.)
(6) Disconnect the wire from the connector
mary board. (See Fig.15.)
(7) Disconnect the parallel wire from the connector
the regulator connect board. (See Fig.16.)
(8) Disconnect the parallel wire from the connector
the headphone board. (See Fig.16.)
(9) Disconnect the wires from the connectors (CN201, CN702)
on the main amplifier board. (See Fig.16.)
(10) Remove the four screws Q and three screws R and take
out the main amplifier board with the regulator and regula-
tor connect boards from the main body. (See Fig.16.)
1-12 (No.MB449)
Primary board
CN301 on
CN509 on
CN218
CN218 on the pri-
CN540
CN412 on
CN216 on
Support board
Tie bands
Tie bands
CN530
CN509
Input mother board
Speaker terminal board
Speaker relay board
Fig.15
Regulator connect board
R R
CN201
CN412
Q
Main amplifier board
Fig.16
Tie bands
Tie bands
CN801
CN301
CN701
CN216
Headphone board
CN702
R
Q