JVC KD-SX950 Service Manual page 14

BD3860K (IC911) : E. volume
1. Pin layout
33
34
44
1
2. Block diagram
GND FIL VCC SEL1
6 5 9 40
POWER
SUPPLY
INPUT
GAIN
41
A1
0 to 18 dB
42
B1
43
C1
44
D1
INPUT
SELECTOR
A2 1
2
B2
INPUT
GAIN
3
C2
0 to 18 dB
D2 4
39
SEL2
3. Pin function
Pin
Symbol Function
No.
1 A2
CH2 input terminal A
2 B2
CH2 input terminal B
3 C2
CH2 input terminal C
4 D2
CH2 input terminal D
5 FIL
1/2 VCC terminal
6 GND
Ground terminal
7 SI Serial data input terminal
8 SC Serial clock input terminal
9 VCC
Power supply
10 OUTR2 CH2 rear output terminal
11 OUTF2 CH2 front output terminal
CH1 rear output terminal
12 OUTR1
13 OUTF1 CH1 front output terminal
CH1 bus filter setting terminal
14 BOUT1
CH1 bus filter setting terminal
15 BNF1
CH2 bus filter setting terminal
16 BOUT2
CH2 bus filter setting terminal
17 BNF2
CH2 treble filter setting terminal
18 TNF2
CH1 treble setting terminal
19 TNF1
CH2 treble input terminal
20 TIN2
CH2 BBE II signal output terminal
21 BBOUT2
CH2 output mix amp negative input terminal
22 MIX2
~ 23
22
12
~ 11
VIN1 LOUD1 HF1 LF1 DET1
36 35 34 33
MAIN
VOLUME
LOW(f=50Hz) 6dB
0 to -40 dB
PROCESS CONTROL +3 to 12dB
LOUDNESS
(f=10kHz)
MAIN
VOLUME
LOW(f=50Hz) 6dB
0 to -40 dB
PROCESS CONTROL +3 to 12dB
LOUDNESS
(f=10kHz)
38 37 25 24
VIN2 LOUD2 HF2 LF2
VCA1 MIX1 BBOUT1 TIN1 TNF1
28 32 31 30 29 19
TREBLE
-14 to +14dB
LOGIC
TREBLE
-14 to +14dB
26 23 22 21 20 18
DET2 VCA2 MIX2 BBOUT2 TIN2 TNF2
Pin
Symbol
No.
23 VCA2
CH2 high frequency VCA output terminal
24 LF2
CH2 low frequency filter setting terminal
25 HF2
CH2 high frequency filter setting terminal
26 DET2
CH2 high frequency attack release time setting
27 NC
Non connect
28 DET1
CH1 high frequency attack release time setting
29 TIN1 CH1 treble input terminal
30 BBOUT1 CH1 BBE II signal output terminal
31 MIX1
CH1 output mix amp. negative input terminal
32 VCA1 CH1 high frequency VCA output terminal
33 LF1 CH1 low frequency filter setting terminal
CH1 high frequency filter setting terminal
34 HF1
35 LOUD1 CH1 loudness filter setting terminal
CH1 main volume input terminal
36 VIN1
CH2 loudness filter setting terminal
37 LOUD2
CH2 main volume input terminal
38 VIN2
CH2 input gain output terminal
39 SEL2
CH1 input gain output terminal
40 SEL1
CH1 input terminal A
41 A1
CH1 input terminal B
42 B1
CH1 input terminal C
43 C1
CH1 input terminal D
44 D1
BNF1 BOUT1
15 14
FADER
CH1 FRONT
BASS
0 to -5 dB
-14 to +14dB
FADER
CH1 REAR
0 to -5 dB
FADER
CH2 REAR
0 to -5 dB
BASS
FADER
-14 to +14dB
CH2 FRONT
0 to -5 dB
17 16
BNF2 BOUT2
Function
13
OUTF1
12
OUTR1
7 SI
8 SC
10
OUTR2
11
OUTF2