Description Of Major Ics; Kd-S570/Kd-S620 - JVC KD-S620 Service Manual

Description of major ICs

TEA6320T-X(IC301) : E.volume
1.Terminal Layout
SCL
SDA 32
1
VCC
GND 31
2
OUTRR
OUTLR 30
3
OUTRF
OUTLF 29
4
TR
TL 5 28
B2R
B2L 27
6
B1R
B1L 26
7
IVR
IVL 25
8
ILR
ILL 24
9
QSR
QSL 10 23
IDR
IDL 22
11
Vref
MUTE 21
12
ICR
ICL 20
13
CD-CH
CAP
IMD 19
14
IBR
IBL 18
15
TAPE
IAR
IAL 17
16
TUNER
3.Pin Functions
Pin
Symbol I/O
No.
Serial data input/output.
1
SDA I/O
Ground.
2 GND -
3 output left rear.
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 leftchannel 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
2.Block Diagram
10 8 9
21
31 POWER
SUPPLY
2
VOLUME 1
+20 to -31 dB
19
LOUDNESS
LEFT
16
15
13
11
SOURCE
SELECTOR
14
VOLUME 1
+20 to -31 dB
22 LOUDNESS
RIGHT
20
18
17
23 25 24
Functions
5
7 6 12
MUTE
FUNCTION
ZERO CROSS
DETECTOR
BASS
TREBLE
LEFT
LEFT
+15 dB
+12 dB
LOGIC
BASS
TREBLE
RIGHT
RIGHT
+15 dB
+12 dB
26 27 28
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
23 O
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
- Supply voltage.
31
Vcc
I Serial clock input.
32
SCL

KD-S570/KD-S620

VOLUME 2
0 to 55 dB
3
BALANCE
FENDER REAR
VOLUME 2
0 to 55 dB
4
BALANCE
FENDER FRONT
32
HC BUS
REC
1
VOLUME 2
0 to -55dB
29
BALANCE
FENDER FRONT
VOLUME 2
30
0 to -55dB
BALANCE
FENDER REAR
Functions
1-13