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