Sony KDL-32U2520 Service Manual page 26

A B C
A1/A1P.-SE1
1
2
PORT_CS
TUNER_I2C_SW
I2C_SCL_OFDM
3
I2C_SDA_OFDM
AGC_DIGITAL
4
IF_DIGITAL_-
IF_DIGITAL_+
CVBS_TUNER
5
CVBS2_OUT
CVBS2_IN
6
AV_LINK
7
CVBS1_OUT
CVBS1_IN
8
CN2022
49P
WHT
9
A1/A1P (3/3) Board Waveforms
10
11
D E F
R2148
XX
R2147
0
CHIP
JL2112
8.5V 1
JL2113
5V 2
GND 3
JL2114
33V 4
GND 5
R2053
0 CHIP
6
R2054
0 CHIP
JL2115
7
C2041 XX
GND 8
R2055
0 CHIP
JL2116
9
R2056
0 CHIP
JL2117
10
C2042 XX
GND 11
JL2118
12
GND 13 R2039
0 CHIP
JL2119
I2C_SCL 14
JL2120
I2C_SDA 15
R2038
C2040
XX 0 CHIP
GND 16
17
18
GND 19
R2040 JL2121
0 CHIP
20
C2037 XX
GND 21
TP1 R2041
0 CHIP
V_YUV 22
C2038 XX
GND 23
TP2
R2042
0 CHIP
U_YUV 24
C2039 XX
GND 25
TP3 R2043
0 CHIP
Y_YUV 26
C2036 XX
GND 27
28
R2044
C2030 XX
0 CHIP
GND 29
R2057
0 CHIP
30
C2082 XX
R2045
0 CHIP
MODE2
31
R2058
0 CHIP
32
R2046
0 CHIP
FBLK2 33
R2059
0 CHIP
B2 34
GND 35
R2047
0 CHIP
G2 36
GND 37
R2060
0 CHIP
R2 38
GND 39
40
R2048
C2034 XX
0 CHIP
GND 41
TP4 R2061
0 CHIP
42
C2083 XX
MODE1 43
R2049 R2062
0 CHIP 0 CHIP
FBLK1 44
TP5 R2050
0 CHIP
B1 45
GND 46
TP6 R2051
0 CHIP
G1 47
GND 48
TP7 R2052
0 CHIP
R1 49
(20us/div) (20us/div)
TP1 TP2 TP3
980mVp-p (H)
500mVp-p (H) 500mVp-p (H)
G H I
BUFFER_V
R2145
0
8.5V
AGC_DEFEAT 1
+5VA
SV_STBY/AUDIO MONO 2
R2144
XX
GND 3
JL2124
33V
AU_MUX_OUT_R 4
JL2125
AU_MUX_OUT_L 5
PORT_CS JL2126
AU_MUX_CTRL_B 6
TUNER_I2C_SWITCH JL2127
AU_MUX_CTRL_A 7
JL2128
QSS 8
I2C_SCL_OFDM
GND 9
I2C_SDA_OFDM
LINEOUT_R 10
LINEOUT_L 11
IF_AGC_DIGITAL
GND 12
L2 OUT 13
SCL_5V
R2 OUT 14
SDA_5V
GND 15
L1 IN 16
IF_DIGITAL_- R1 IN 17
IF_DIGITAL_+ GND
18
L1 OUT 19
CVBS_ANALOG_RF
R1 OUT 20
CN2024
20P
JL2130JL2131JL2132JL2133 JL2134 JL2135 JL2136 JL2137
WHT
V_YUV
U_YUV
Y_YUV
V-OUT-2B
A / B BOARD CONNECTORS
V-IN-2
MODE2
AV_LINK
BLK2
BLUE-2
GREEN-2
RED-2
V-OUT-1B
V-IN-1
MODE1
A1/A1P
BLK1
BLUE-1
GREEN-1
RED-1
(20us/div) (10us/div) (10us/div)
TP4 TP5
1Vp-p (H) 650mVp-p (H)
~ A1/A1P Board Schematic Diagram [ Tuner, I/O Connectors & A/V Switching ] Page 1C/2 ~
- 25 -
J K L M
JL2122
5V_STBY
JL2129
AGC_DEFEAT
JL2123
AU_MUX_OUT_R
AU_MUX_OUT_L
AU_MUX_CTRL_B
AU_MUX_CTRL_A
QSS
OUT_R
OUT_L
SC2-OUT-L
SC2-OUT-R
SC1-IN-L
SC1-IN-R
SC1-OUT-L
SC1-OUT-R
1 C / 2
(10us/div) (10us/div)
TP6 TP7
650mVp-p (H) 650mVp-p (H)
N O