JVC KD-SH99R service manual TC74VHC157FT-XIC803 DACSW, 1-26

KD-SH99R

UPD63711AGC(2/2)

Pin No.	Symbol	I/O	Function
78	EQ2	-	Equalizer part connection terminal of RF amplifier.
79	EQ1
80	RF	I	Reversing input terminal of RF saming amplifier.
81	AGND	-	It is GND of an analog circuit.
82	A	I	Photo detector A input terminal.
83	C	I	Photo detector B input terminal.
84	B	I	Photo detector C input terminal.
85	D	I	Photo detector D input terminal.
86	F	I	Photo detector F input terminal.
87	E	I	Photo detector E input terminal.
88	AVDD	-	Positive power supply supply terminal to analog circuit.
89	REFOUT	O	reference potential output terminal.
90	FE	I	Focus make an error amplifier reversing input terminal.
91	FEO	O	Focus Allah amplifier output terminal.
92	TE	I	Tracking make an error amplifier reversing input terminal.
93	TEO	O	Tracking error amplifier output terminal.
94	TE2	O	Terminal to which tracking error after amplifies is output.
95	TEC	I	The tracking comparator input terminal. The tracking error signal which
			cuts the DC element is input. The tracking 0 crossing is detected by
			using this signal in LSI.
96	AGND	-	it is GND of an analog circuit.
97	PD	I	It is a terminal of the input of the detection signal of PD for the LD output
			monitor.
98	LD	O	LD control current output terminal.
99	PN	I	It is a control polarity set value of the APC circuit.
100	AVDD	-	Positive power supply supply terminal to analog circuit.

TC74VHC157FT-X(IC803):DAC SW

1.Pin lauout

2.Pin function

SELECT 1

16

Vcc

INPUTS

1A

2

ASG

15

ST

OUTPUT

1B

3

B

A

14

4A

ST

SELECT

A

B

H

X

X

X

L

1Y

4

Y

B

13

4B

2A

5

A

Y

12

4Y

L

L

L

X

L

2B 6

B A

11

3A

L

L

H

X

H

2Y

7

YYB

10

3B

L

H

X

L

L

GND

8

9

3Y

L

H

X

H

H

X:Don't Care

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