Elenberg LTV - 4231, Service Manual

Page: 4 / 52

5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
IF-AFT
SIFPOUT
IF-AGC
SCL_EXT
SDA_EXT
IF_TV
IF_TV
SDA_EXT
SCL_EXT
IF-AGC
TV-L/R
TV-SIFM
TV-SIFP
TV-L/Rin
TV-Vin-
TV-Vin+
SCART1_VOUT
TV_CVBS
TV-SIFP
SIFPOUT
Tuner_5V
AGND
AGND
AGND
AGND AGND
AGND
AGND
AGND
AGND
Tuner_5V
AGND
AGND
Tuner_5V
AGND
5V-OUT
5V-OUT
Tuner_5V
VCC_12V
AGND
AGND
Tuner_5V
AGND
AGND
Tuner_5V
AGND
AGND
SCL_EXT 2
SDA_EXT 2
TV-SIFP 2
TV-SIFM 2
IF-AFT 2
TV-L/Rin 2
TV-Vin+ 2
TV-Vin- 2
SCART1_VOUT 5
I2C ADDRESS(R375 NC):
READ is 0X87
WRITE is 0X86
这里实测出来的时候大概是
视频
Vpp
＝
1.94V
这里实测视频
Vpp=1V±10
％
100+180=280
和
33
欧姆 分压
这里可以选择
5V
或者
12V
给预中放
供电
这里实际上是个射随
这里实际上是个射随，
SIF
也可以 不过射随
C126
560pF
C126
560pF
L104
NC
L104
NC
R108
12K
R108
12K
R129
5.6K
R129
5.6K
R133
1K R133
1K
R135 10 R135 10
R127 47 R127 47
C130
0.1uF
C130
0.1uF
1
3
2
Q103
3904
Q103 3904
C116
10nF
C116
10nF
C132
1nF
C132
1nF
R112
33
R112
33
R152
NC/10 R152
NC/10
R134
10 R134
10
R115
75
R115
75
R143
12K R143
12K
R117
22K R117
22K
R111
1K
R111
1K
C109
0.1uF
C109
0.1uF
R107
22K
R107
22K
VD102
ISS110 VD102
ISS110
C115
10nF
C115
10nF
C134
1nF
C134
1nF
1 2
L110
330_Ohm_200mA
L110
330_Ohm_200mA
R140
1K
R140
1K
R123
4.7K R123
4.7K
R138
47
R138
47
C131
470nF
C131
470nF
1 2
L109
330_Ohm_200mA
L109
330_Ohm_200mA
C104
0.1uF
C104
0.1uF
R146
100
R146
100
C103
1.5nF
C103
1.5nF
C106
220nF
C106
220nF
R104
4.7K
R104
4.7K
C121
NC/330pF
C121
NC/330pF
R109
NC/680K_1%
R109
NC/680K_1%
R150
1.2K
R150
1.2K
1
3
2
Q104
3904 Q104
3904
R105
4.7K
R105
4.7K
1 2
L111
330_Ohm_200mA
L111
330_Ohm_200mA
R121 47 R121 47
R119 0 R119 0
+
CA104
47uF/16V
+
CA104
47uF/16V
C107
470nF
C107
470nF
1
2
3
Q102
3904 Q102
3904 R103
270
R103
270
C146
10nF
C146
10nF
R145 0 R145 0
C124
10nF
C124
10nF
C113
0.1uF
C113
0.1uF
+
C144
100uF/16V
+
C144
100uF/16V
C129
10nF C129
10nF
R114
NC/180K_1%
R114
NC/180K_1%
R130
NC/2K R130
NC/2K
CA101
470uF/25V
CA101
470uF/25V
C122
NC/330pF
C122
NC/330pF
R139 0 R139 0
R116
330
R116
330
R126 47 R126 47
R125
NC
R125
NC
R101
0/220 R101
0/220
R131
220 R131
220
R106
4.7K
R106
4.7K
VD104
ISS110 VD104
ISS110
C117
470nF
C117
470nF
C119
1nF
C119
1nF
C105
0.1uF
C105
0.1uF
1 2
L105
330_Ohm_200mA
L105
330_Ohm_200mA
1 2
L103
FB
L103
FB
R142
820/120 R142
820/120
C102
10nF
C102
10nF
2
ING
4
OUT1 GND
3
5 OUT2 1
IN
SAW
N102
K9453M
SAW
N102
K9453M
R136
100
R136
100
R137
100
R137
100
C143
10nF
C143
10nF
+
C136
100uF/16V
+
C136
100uF/16V
C133
10nF
C133
10nF
D103
1N4148
D103
1N4148
C145
10nF
C145
10nF
C138
1nF
C138
1nF
VD101
ISS110
VD101
ISS110
AG
C
1
NC1
2
AS
3
SC
L
4
SD
A
5
NC2
6
5V
B
7
AFC
8
BT
9
GND
10
IF
out
11
GND3
12
GND2
13
GND1
14
GND4
15
N101 AFT1/3100 N101 AFT1/3100
R113 1K R113 1K
DGND
7
TOP
9
VIF1
1
VIF2
2
RE
F
15
NC(5)/
V
A
G
C(6)
16
DE
E
M
5
SC
L
11
OUT1
3
NC
13
A
UD_OUT
8
SD
A
10
FMPLL
4
TAGC
14
AFD
6
SIO
M
AD
12
C
VBS
17
AG
N
D
18
VPL
L
19
VPP
20
AFC
21
OUT2
22
SIF1
23
SIF2
24
N103
TDA9886
N103
TDA9886
C123
0.1uF
C123
0.1uF
R118
100K R118
100K
R128 NC R128 NC
1 2
L102
FB
L102
FB
R102
3K
R102
3K
C120
0.1uF
C120 0.1uF
R151
0 R151
0
R120 47 R120 47
L106
NC/1uH L106
NC/1uH
C114
10nF
C114
10nF
C137
10nF
C137
10nF C128
0.1uF
C128 0.1uF
C110
10nF
C110
10nF
Q101
2SC388A
Q101
2SC388A
R132 100 R132 100
C118
390pF
C118
390pF
R122
100
R122
100
2
ING
4
OUT1 GND
3
5 OUT2 1
IN
SAW
N104
K3953M
SAW
N104
K3953M
R141
820 R141
820
R144
1K R144
1K
L101
NC/0.82uH
L101
NC/0.82uH
R124
56 R124
56
1
2
3
Q105
3904
Q105
3904
C142
470nF
C142
470nF
C108
22pF
C108
22pF
R110
75
R110
75
C125
22pF
C125
22pF
+
C135
100uF/16V
+
C135
100uF/16V
1
2
3
Z101
4MHz
Z101
4MHz
+
CA102
47uF/16V
+
CA102
47uF/16V