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[ AV PWB(STEREO) CIRCUIT DIAGRAM ]
A
B
8
7
6
5
4
3
2
1
A
B
AV-20FD22
C
D
STEREO SCHEMATIC DIAGRAM
NOTE:
THE DC VOLTAGE AT EACH PART WAS MEASURED
WITH THE DIGITAL TESTER WHEN THE COLOR BROADCAST
WAS RECEIVED IN GOOD CONDITION AND PICTURE IS NORMAL.
C
D
No.51821
AV-20FD22
E
(AV PCB)
R911
100
1/4W
R912
100
1/4W
TU.AU-L
TP901
NC
NC
2.2
2.2
2.2
2.2
0
4.2
4.4
0
3.7
3.4
2.2
3.4
24
23
22
21
20
19
18
17
16
15
14
13
GND
DAC
ZAP
IIC Decoder
St.PLL
Det
VCA
Det
AGC
OUT SW
Pilot
Input
SAP
Cancel
Switch
L-R Filter
L-R Demod
Matrix
De-Emph
Pilot
(L-R)/SAP
Filter
Filter
Filter
75us
L+R Filter
L+R Demod
Stereo
Noise
SAP
Filter
Cancel
SAPout
Demod
Offset
fH.2fH Trap Filter
Filter
Filter
SAP
Wide Band
Spectral
Expand
Cancel
Wide Band
RMS Det
Expand
RMS Det
Det
Offset
dbx De-Emph
Wide Band
Spectral
Spectral
Noise
Vcc
1
2
3
4
5
6
7
8
9
10
11
12
1.0
2.2
2.3
2.2
2.3
2.4
0.7
5.1
2.6
2.6
0.6
2.2
3.6
TUNER AUDIO SIGNAL
NOTE: THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME
OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE
E
2-33
2-34
F
G
FROM/TO MICON/TUNER
SCL
SDA
FROM/TO AV SW
47
TUNER_A_L
48
TUNER_A_R
FROM/TO VIF/SIF/CHROMA
46
TU_AUDIO
FROM/TO POWER
P.CON+A5V
GND
PCB350
TMA503
F
G
No.51821
H
8
7
6
5
4
3
2
1
H
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