Read Sony KDL-20S4000 / KDL-20S4020 Service Manual online
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4-1. BLOCK DIAGRAMS (1)
1
14
TUNER, I/O
CONNECTIONS &
A/V SWITCHING
4
15
12
2
10
12C SCL SW
13
9
11
CN2022
33
34
17
18
12
TO BDT BOARD
CN3005
D1200
RECTIFIER
36
38
44
FBLK 1
47
G1
49
14
15
R1
12C SCL
12C SDA
VIDEO OUT
45
B1
BLUE IN
MODE 1
GREEN IN
RED IN
BLANKING
VIDEO IN
LEFT IN
RIGHT IN
LEFT OUT
RIGHT OUT
Q2004
AMP
R
L
J2022
SCL
ANALOG AGC SW
12C SCL SW
12C SDA SW
33V
+5VA
IF ANALOG
IF AGC DIGITAL
IF DIGITAL +
IF DIGITAL -
TU AGC
33V
SDA
ANALOG IF
5V
DIGITAL IF 2
IF AGC
DIGITAL IF 1
TU1300
TUNER
TUNER BLOCK
7
10
9
22
24
26
2
20
28
30
31
32
1
40
4
43
42
19
7
8
11
15
16
20
6
2
3
1
IF DIGITAL -
IF DIGITAL +
AGC DIGITAL
5V
33V
TUNER 12C SW
12C SDA OFDM
12C SCL OFDM
V-YUV
U-YUV
Y-YUV
5V
CVBS TUNER
CVBS2 OUT
CVBS2 IN
MODE 2
AV LINK
FBLK 2
B2
G2
R2
8.5V
33V
CVBS1 OUT
CVBS1 IN
MODE 1
8.5V
33V
+5VA
V OUT 2 B
V IN 2
MODE 2
AV LINK
BLK 2
BLUE 2
GREEN 2
RED 2
V OUT 1 B
V IN 1
MODE 1
BLK 1
BLUE 1
GREEN 1
RED 1
Q2005
BUFFER
V OUT 1 B
V IN 1
MODE 1
BLK 1
BLUE 1
GREEN 1
RED 1
SC1 IN L
SC1 IN R
SC1 OUT L
SC1 OUT R
IC1000
ANALOG MULTIPLEXER/
DEMULTIPLEXER
ANALOG AGC SW
12C SDA SW
TUNER 12C SW
TUNER 12C SW
TUNER 12C SW
12C SDA OFDM
12C SCL OFDM
SDA 5V
SCL 5V
TUNER SWITCH
16
3
Z
Y
X
C
B
A
X0
Y0
X1
Y1
VCC
Z1
ANALOG AGC
5V
STBY
L1
SW1201
FILTER
SURFACE WAVE
L2
01
02
Q1201
SWITCH
Q1202
SWITCH
10
SW1200
SAW FILTER
1
4
5
6
7
24
22
23
1
2
14
10
11
SDA 5V
SCL 5V
IC1200
IF-PLL
DEMODULATOR
OP/2
S1 F
S1 F
V1 F
V1 F
TU AGC
SDA
SCL
17
VIDEO
3
OP/1
12
QSS
15
VCD
Q1203
AMPLIFIER
Q1204
BUFFER
Q1205
AMPLIFIER
C1226
L1201
TUNED
CIRCUIT
CVBS ANALOG RF
X1200
ANALOG IF BLOCK
AUX-MUX-OUT-R
Q2001
SWITCH
AUX-MUX-CTRL-B
16
9
12
IC2000
4 CHANNEL
ANALOG
MULTIPLEXER/
DEMULTIPLEXER
VDD
B
A
4
Y2
11
X3
1
3
13
10
Q2000
SWITCH
AUX-MUX-OUT-L
AUX-MUX-CTRL-A
8.5V
X
Y
Y0
X0
Y3
2
15
14
5
X2
Y1
X1
R-YUV
L-YUV
DV1 R
DV1 L
AUDIO SWITCH
J2023
L-YUV
R-YUV
U-YUV
V-YUV
Y-YUV
CN2024
4
J2024
AUX-MUX-OUT-R
AUX-MUX-OUT-L
AUX-MUX-CTRL-B
AUX-MUX-CTRL-A
Q1200
SWITCH
QSS
AGC DEFEAT
L1 IN
5V STBY
SC2-IN-L
SC2-IN-R
SC1 IN L
SC1 IN R
SC1 OUT L
SC1 OUT R
R1 IN
L1 OUT
R1 OUT
L2 OUT
R2 OUT
SC2 OUT L
SC2 OUT R
CN2023
1
2
3
6
19
10
7
8
11
15
16
20
Q2002
AMPLIFIER
Q2003
BUFFER
VIDEO OUT
RIGHT OUT
RIGHT IN
LEFT OUT
LEFT IN
AV LINK
BLUE 2
MODE 2
GREEN 2
RED 2
BLK 2
V IN 2
SC2 OUT R
SC2 IN R
SC2 OUT L
SC2 IN L
SCART 2
AV 2
TO BDT BOARD
CN3006
EXTERNAL
CONNECTOR
DVI
CONNECTOR
PC
CONNECTION
V OUT 2 B
SCART 1
AV 1
5
6
7
8
1
2
16
17
19
20
13
14
AV SCART 2
PC-R
PC-L
AV SCART 1
VIDEO SCART 2
CN2021
5V
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