LG 37LH250H Service Manual page 30

TUNER
SANYO_TUNER INNOTEK_TUNER
TU1001-*1 TU1001
UCA36AL
TDVW-H104P
NC_1 NC_1
1
1
NC_2 NC_2
2 2
GND_1 GND_1
3 3
+5V[MAIN] +B1[5V]
4 4
NC_3[RF_AGC] RF_AGC
5 5
NC_4[VT] GND_2
6 6
GND_2
DATA
7 7
SDA CLOCK
8 8
SCL AS
9 9
AS
DIF[+]
10 10
NC_5 DIF[-]
11
11
D_IF1 IF_AGC
12 12
D_IF2 SIF
13 13
IF_AGC NC_3
14
14
+5V[VIF] AUDIF
15 15
SIF VIDEO
16 16
NC_6[AFT]
17
17
NC_7
18
VIDEO SHIELD
19
20
SHIELD
TUNER 5V
1 2
PANEL_POWER
L1012
IC1003
AS7809DTRE1
L1010 R1028
BG2012B800 100
INPUT OUTPUT
1 3
OPT
2
OPT
C1082
C1034 C1036
C1081 GND C1035 C1037
0.1uF 100uF 0.1uF 100uF 0.33uF
0.1uF
16V 16V 16V 16V 16V
16V
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
TUNER
+5V_TU
L1003
500
C1007 C1005 C1011
C1013 C2250
C1008
0.1uF 0.1uF 10uF 220uF 220uF
0.01uF
50V 50V 10V 16V 16V
25V
+5V_TU
R1013 R1017
4.7K 4.7K
OPT
C1027
100pF
50V
R1023
22
R1022
22
OPT OPT
C1017
C1015 C1025
C1024
R1031 0 100pF
100pF 27pF
27pF
50V 50V
OPT 50V 50V
IF_AGC
+5V_TU
L1004
6.8uH
R1007
R1010
12K
470
R1009 R1003
OPT 0 0
C1009
0.01uF E
50V
ISA1530AC1
B Q1000
R1008
C
10K
R1004
2.2K
OPT
0.1uF
SIFMO
R1016
C1021
47
OPT
OPT
MStar Option
R1005 R1018
0 0
OPT
ISA1530AC1
Q1001
B
R1006
C1012
10K
0.047uF
OPT 50V
VCOMO
MStar Option
The value of coil & cap' could be changed to optimized each
IC1002
KIA78R05F
6
3 4 5
+5V_TU
C1039 C1040 C1041
47uF 0.1uF 0.01uF
16V 25V
Close to tuner
(I2C Channel 6)
R1026
0 FE_TUNER_SDA
R1027
0 FE_TUNER_SCL
0 L1013
IF_N
1/10W
5%
R1032
0
C1006
R1033
0 L1002
47pF
270nH
0 L1014
IF_P
1/10W
5%
FE_SIF
+5V_TU
R1019
270
R1021
FE_VMAIN
0
008:D24
R1020
270
FM Rejection Option
L1001
E
C1004
82pF
C
50V
MLB-201209-0120P-N2
VSB_CTRL
LGDT3305
+1.2V_DVDD_PVSB
+3.3V_DVDD_PVSB
C1069
R1061 100
0.01uF
IF_P
0.01uF C1070
IF_N
R1062 100
0.1uF R1064 100
C1068
OPT
R1065
R1066
R1067
SIGN273
IF_AGC
1K
R1060 R1063
1K
C1066 C1067
0.1uF 0.1uF
TS_0
TS_1
TS_2
TS_3
TS_4
TS_5
TS_6
TS_7
Mercury Option
+5V_GENERAL
OPT
+3.3V_PVSB +3.3V_FE
IC1001
L1000
SC156515M-1.8TR
L1005
OPT 500
VIN VO
2 4
R1001
OPT R1014
4.7K
OPT
R1002
OPT 15K
1K EN ADJ
1 5
R1015
OPT
3 8.2K
C1002
C1003 C1018
C1020
100uF 0.1uF
GND
100uF 0.1uF
16V
50V
16V 50V
OPT
OPT
008:AR30;004:X17;004:AM17
POWER_EN
IC1000
SC4215ISTRT
R1035 +1.2V_PVSB
100 NC_1 GND
OPT 1 8
R1011
20K R2
R1036
20K EN ADJ
2 7
R1012
C1076
10K R1
1uF
VIN VO
16V
3 6
V0 = 0.8(R1+R2) / R2
C1019 C1079
NC_2 NC_3
C1077 C1078 4 5 100uF
0.1uF
2.2uF 2.2uF 16V
50V
25V 25V
+3.3V_AVDD_PVSB
1N4148W
R1074 D1000
47K
C1071
C1072
27pF
X1005 27pF
R1075
VSB_RESET
C1073
OPT
1uF
25MHz 10V
R1072 1M
+3.3V_AVDD_PVSB
L1219
CB3216PA501E
C2138
0.1uF
50V
R1068
5.1K
OPT
36
1
VROA PLLAVSS
2 35
VINA2 PLLAVDD
34
3
VINA1 VSS33
4 33
INCAP IC1004 VSS
32
5
VSSAAD10A VDD
6 LGDT3305 31
I2CSEL VSS
R1077
0 7 30 22
ANTCON SCL
8 29 FE_DEMOD_SCL
VDD VDD33
22 R1078
9 28
OPT
I2CRPT_SCL SDA
10 27 FE_DEMOD_SDA
OPT I2CRPT_SDA NIRQ C1074 C1075
11 26
OPT OPT
TPSOP
IF OUT
25
12
RF OUT TPCLK
R1076
OPT
+3.3V_DVDD_PVSB
AR1079
100
1/16W
470
TS_SYNC
R1069
LD1000
TS_CLK
TS_VALID
AR1070 100
TS_0
TS_1
TS_2
TS_3
AR1071 100
TS_4
TS_5
TS_6
TS_7
LGDT3305 POWER
VSB +3.3V B+ BLOCK
+3.3V_PVSB
+3.3V_AVDD_PVSB +3.3V_PVSB
+3.3V_DVDD_PVSB
L1007
L1008
500 500
C1026 C1030 C1032 C1033
C1023 C1028
0.1uF 0.1uF 0.1uF
10uF 10uF 0.1uF
50V
16V 16V 50V 50V 50V
3216
3216
VSB +1.0V B+ BLOCK
+1.2V_PVSB +1.2V_DVDD_PVSB
R1034
0
1/4W
C1043
5% C1044
C1038
0.1uF
0.1uF
10uF
16V 50V 50V
3216
37LH250H 09.05.19
Tuner/3305 5 14