JVC KS-FX725R Service Manual page 28

KS-FX725R
TEA6320T-X (IC911) : E.volume
1.Pin layout
SDA 32
1
GND 31
2
OUTLR 30
3
OUTLF 29
4
TL 28
5
B2L 27
6
B1L 26
7
IVL 25
8
ILL 24
9
QSL 23
10
IDL 22
11
MUTE 21
12
ICL 20
13
CD-CH
IMD 19
14
IBL 18
15
TAPE
IAL 17
16
TUNER
3.Pin functions
Pin
Symbol I/O
No.
Serial data input/output.
1
SDA I/O
Ground.
2
GND -
output left rear.
3 OUTLR O
output left front.
4
OUTLF O
Treble control capacitor left channel or
5
TL I
input from an external equalizer.
Bass control capacitor left channel or
6 B2L -
output to an external equalizer.
Bass control capacitor left channel.
7
B1L -
Input volume 1. left control part.
8
IVL I
Input loudness. left control part.
9 ILL I
Output source selector. left channel.
10
QSL O
Not used
11
IDL -
Not used
12 MUTE -
Input C left source.
13
ICL I
Not used
14
IMO -
Input B left source.
15 IBL I
Input A left source.
16
IAL I
1-28
2.Block diagram
10
SCL
VCC
21
OUTRR
31 POWER
OUTRF
SUPPLY
2
TR
19
B2R
B1R
IVR
16
ILR
15
QSR
13
IDR
11
SOURCE
Vref
SELECTOR
14
ICR
22
CAP
20
IBR
18
IAR
17
23
Functions
8 9 7 6
VOLUME 1
BASS
TREBLE
+20 to -31 dB
LEFT
LOUDNESS
+15 dB
+12 dB
LEFT
LOGIC
VOLUME 1
BASS
TREBLE
+20 to -31 dB
RIGHT
RIGHT
LOUDNESS
+15 dB
+12 dB
RIGHT
25 24 26 27
Pin
Symbol I/O
No.
17 I
IAR Input A right source.
18 I
IBR Input B right source.
-
19
CAP Electronic filtering for supply.
20 I
ICR Input C right source.
21 -
Vref Reference voltage (0.5Vcc)
-
22
IDR Not used
O
23
QSR Output source selector right channel.
24 I
ILR Input loudness right channel.
I
25
IVR Input volume 1. right control part.
-
26
B1R Bass control capacitor right channel
Bass control capacitor right channel or
27 O
B2R
output to an external equalizer.
Treble control capacitor right channel or
I
28
TR
input from an external equalizer.
O Output right front.
29
OUTRF
30 O Output right rear.
OUTRR
31 - Supply voltage.
Vcc
I Serial clock input.
32
SCL
5 12
VOLUME 2
MUTE
0 to 55 dB
FUNCTION
BALANCE
ZERO CROSS
FENDER REAR
DETECTOR
VOLUME 2
LEFT
0 to 55 dB
BALANCE
FENDER FRONT
HC BUS
REC
VOLUME 2
0 to -55dB
BALANCE
FENDER FRONT
VOLUME 2
0 to -55dB
BALANCE
FENDER REAR
28
Functions
3
4
32
1
29
30