JVC KD-SH99 Service Manual page 26

KD-SH99
QQ
3 7 63 1515 0
Pin No. Symbol
78
EQ2
79
EQ1
80
RF
81
AGND
82
A
83
C
84
B
85
D
86 F
87 E
88 AVDD
89 REFOUT
90 FE
91 FEO
92
TE
93
TEO
94
TE2
95
TEC
96
AGND
97 PD
98 LD
99 PN
100 AVDD
TE
L 13942296513
TC74VHC157FT-X(IC803):DAC SW
1.Pin lauout
SELECT 1
1A 2
1B 3
1Y 4
2A 5
2B 6
2Y 7
GND 8
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I/O
- Equalizer part connection terminal of RF amplifier.
I Reversing input terminal of RF saming amplifier.
- It is GND of an analog circuit.
I Photo detector A input terminal.
I Photo detector B input terminal.
I Photo detector C input terminal.
I Photo detector D input terminal.
I Photo detector F input terminal.
I Photo detector E input terminal.
- Positive power supply supply terminal to analog circuit.
O reference potential output terminal.
I Focus make an error amplifier reversing input terminal.
O Focus Allah amplifier output terminal.
I Tracking make an error amplifier reversing input terminal.
O Tracking error amplifier output terminal.
O Terminal to which tracking error after amplifies is output.
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.
- it is GND of an analog circuit.
I It is a terminal of the input of the detection signal of PD for the LD output
monitor.
O LD control current output terminal.
I It is a control polarity set value of the APC circuit.
- Positive power supply supply terminal to analog circuit.
16 Vcc
15 ST
ASG
B A 14 4A
13 4B
Y B
12 4Y
A Y
B A 11 3A
10 3B
YYB
9 3Y
x ao
y
. i
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8
Function
Q Q
3 6 7 1 3
2.Pin function
INPUTS
ST SELECT A
H X X
L L L
L L H
L H X
L H X
X:Don't Care
u163
.
2 9 9 4 2 8
UPD63711AGC(2/2)
1 5 0 5 8 2 9 9 4
OUTPUT
B
X L
X L
X H
L L
H H
m
co
9 9
2 8 9 9