JVC KS-FX725R service manual TEA6320T-X IC911 E.volume, Pin layout Block diagram

KS-FX725R

TEA6320T-X (IC911) : E.volume

1.Pin layout 2.Block diagram

SDA	1	32	SCL
GND	2	31	VCC
OUTLR	3	30	OUTRR

10

21

31 POWER

8	9	7	6	5	12
						VOLUME 2
					MUTE
						0 to 55 dB	3
					FUNCTION
					ZERO CROSS	BALANCE
						FENDER REAR
					DETECTOR

OUTLF 4 29 OUTRF

2

SUPPLY

VOLUME 1 BASS TREBLE

TL	5		28	TR
B2L	6		27	B2R
B1L	7		26	B1R
IVL	8		25	IVR
ILL	9		24	ILR
QSL 10			23	QSR
IDL 11			22	IDR
MUTE 12			21	Vref
ICL 13		CD-CH	20	ICR
IMD 14			19	CAP
IBL 15		TAPE	18	IBR
IAL 16		TUNER	17	IAR

19

16

15

13

11

14

22

20

18

17

SOURCE

SELECTOR

+20 to -31 dB		LEFT	LEFT		VOLUME 2
LOUDNESS					0 to 55 dB	4
		+15 dB	+12 dB
LEFT					BALANCE
					FENDER FRONT
						32
		LOGIC			HC BUS
					REC
						1
					VOLUME 2
VOLUME 1	BASS		TREBLE		0 to -55dB	29
+20 to -31 dB					BALANCE
	RIGHT		RIGHT
LOUDNESS				FENDER FRONT
	+15 dB		+12 dB
RIGHT
					VOLUME 2	30
					0 to -55dB
					BALANCE
				FENDER REAR

23 25 24 26 27 28

3.Pin functions

Pin	Symbol	I/O	Functions	Pin	Symbol	I/O	Functions
No.				No.
1	SDA	I/O	Serial data input/output.	17	IAR	I	Input A right source.
2	GND	-	Ground.	18	IBR	I	Input B right source.
3	OUTLR	O	output left rear.	19	CAP	-	Electronic filtering for supply.
4	OUTLF	O	output left front.	20	ICR	I	Input C right source.
5	TL	I	Treble control capacitor left channel or	21	Vref	-	Reference voltage (0.5Vcc)
			input from an external equalizer.
6	B2L	-	Bass control capacitor left channel or	22	IDR	-	Not used
			output to an external equalizer.
7	B1L	-	Bass control capacitor left channel.	23	QSR	O	Output source selector right channel.
8	IVL	I	Input volume 1. left control part.	24	ILR	I	Input loudness right channel.
9	ILL	I	Input loudness. left control part.	25	IVR	I	Input volume 1. right control part.
10	QSL	O	Output source selector. left channel.	26	B1R	-	Bass control capacitor right channel
11	IDL	-	Not used	27	B2R	O	Bass control capacitor right channel or
							output to an external equalizer.
12	MUTE	-	Not used	28	TR	I	Treble control capacitor right channel or
							input from an external equalizer.
13	ICL	I	Input C left source.	29	OUTRF	O	Output right front.
14	IMO	-	Not used	30	OUTRR	O	Output right rear.
15	IBL	I	Input B left source.	31	Vcc	-	Supply voltage.
16	IAL	I	Input A left source.	32	SCL	I	Serial clock input.

1-28