JVC MX-J270V Service Manual page 32

MX-J270V
BH3854 (IC306) : E.Volume
1.Terminal layout
2.Block diagram
32 31 30
Vcc
20K
20K
1 2 3
Volume, bass treble and surround can be also controlled externally by giving DC voltage
through VC (volume control) terminal, BC (bass control) terminal, TC (treble control)
terminal and SC (surround control) terminal.
Impedance of VC, TC and BC terminals is 10 K
Impedance of SC terminal is 200K
1-32
32
1
29 28 27 26 25
2K
( BASS ) (TREBLE)
TONE CONTROL
20K
47K
47K
20K
TONE CONTROL
( BASS )
(TREBLE)
20K
4 5 6 7 8
(Typ.).
17
16
24 23 22 21 20
10K 10K 10K
CONTROL
Vcc
200K
9 10 11 12 13
(Typ.).
19 18 17
3.8V
14 15 16