Read LG 47LD750 / 47LD750N / 47LD751 / 47LD780 / 47LD790 (CHASSIS:LD03B) Service Manual online
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.
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 ( Full Nim )
FE_TS_DATA[5]
FE_TS_DATA[3]
FE_TS_DATA[4]
FE_TS_DATA[6]
FE_TS_DATA[1]
FE_TS_DATA[7]
FE_TS_DATA[2]
FE_TS_DATA[0]
TU_SIF
C2724
0.1uF
16V
FE_TS_DATA[0-7]
+3.3V_TU
Q2701
ISA1530AC1
E
B
C
+3.3V_TU
R2744
1
C2729
22uF
10V
+1.2V_TU
R2721
100
100
Q2703
2SC3052
E
B
C
+2.5V_TU
SCL0_3.3V
C2721
0.1uF
0.1uF
16V
R2700
0
OPT
C2728
22uF
10V
+3.3V_NORMAL
TU_CVBS
R2720
0
Q2704
ISA1530AC1
E
B
C
FE_TS_VAL
R2743
4.7K
4.7K
R2726
33
C2709
10uF
10V
10uF
10V
OPT
C2712
18pF
50V
18pF
50V
C2701
0.1uF
16V
0.1uF
16V
C2706
0.1uF
16V
16V
C2708
0.1uF
16V
16V
OPT
FE_TS_SYNC
SDA2_3.3V
+3.3V_TU
R2738
0
C2723
10uF
10V
10uF
10V
R2723
100K
R2740
2.2K
2.2K
L2701
BLM18PG121SN1D
C2718
0.01uF
25V
0.01uF
25V
Q2702
ISA1530AC1
E
B
C
R2722
0
CN
FE_TS_SERIAL
C2700
100pF
50V
100pF
50V
R2725
0
EU
C2719
0.1uF
16V
16V
SDA0_3.3V
C2704
100pF
50V
100pF
50V
C2703
0.1uF
16V
0.1uF
16V
+5V_TU
Q2700
2SC3052
OPT
E
B
C
TUNER_RESET
+5V_TU
C2707
0.1uF
16V
16V
C2710
0.1uF
16V
R2749
82
82
+3.3V_TU
+2.5V_TU
C2702
0.1uF
16V
C2725
0.1uF
16V
R2701
0
R2727
33
C2705
100pF
50V
100pF
50V
L2700
BLM18PG121SN1D
R2724
10K
10K
OPT
+5V_TU
FE_TS_DATA_CLK
R2742
10K
+5V_TU
IF_AGC_SEL
C2726
0.1uF
16V
0.1uF
16V
SCL2_3.3V
C2727
22uF
10V
C2722
0.1uF
16V
C2714
18pF
50V
18pF
50V
R2736
0
+5V_TU
RF_SWITCH_CTL
R2755
10K
10K
LNA2_CTL/BOSTER_CTL
R2754
0
CN
+5V_NORMAL
ATV_OUT
+5V_TU
Q2705
ISA1530AC1
E
B
C
C2730
22uF
22uF
10V
C2716
100pF
50V
50V
C2715
22uF
22uF
10V
L2704
3.6uH
3.6uH
NR8040T3R6N
R2719
0
R2732
10K
R2718
10
1/10W
1%
L2703
CIC21J501NE
IC2701
MP2212DN
3
IN
2
GND
4
BS
1
FB
5
VCC
6
SW_1
7
SW_2
8
EN/SYNC
POWER_ON/OFF2_2
C2717
1uF
10V
0.1uF
C2731
L2702
CIC21J501NE
+3.3V_TU
+1.2V_TU
R2739
200
R2702
200
R2712
200
R2741
200
R2746
470
IC2700
AZ2940D-2.5TRE1
2
GND
3
VOUT
1
VIN
C2733
0.1uF
16V
C2720
0.1uF
16V
R2731
22K
1%
EU
R2713
75K
75K
1/8W
1%
EU
R2729
33
R2728
33
C2711
10pF
50V
10pF
50V
C2713
10pF
50V
10pF
50V
C2734
0.1uF
16V
TU2701
TDFR-G135D
HORIZONTAL_NIM
1
RF_S/W_CNTL
2
BST_CNTL
3
+B1[5V]
4
NC[RF_AGC]
5
AS
6
SCL[A_DEMOD]
7
SDA[A_DEMOD]
8
NC(IF_TP)
9
SIF
10
NC
11
VIDEO
12
GND
13
1.2V
14
3.3V
15
RESET
16
2.5V
17
SCL[D_DEMOD]
18
SDA[D_DEMOD]
19
ERR
20
SYNC
21
VALID
22
MCL
23
D0
24
D1
25
D2
26
D3
27
D4
28
D5
29
D6
30
D7
31
SHIELD
TU2701-*1
TDFR-G155D
TDFR-G155D
VERTICAL_NIM
1
RF_S/W_CNTL
2
BST_CNTL
3
+B1[5V]
4
NC[RF_AGC]
5
AS
6
SCL[A_DEMOD]
7
SDA[A_DEMOD]
8
NC(IF_TP)
9
SIF
10
NC
11
VIDEO
12
GND
13
1.2V
14
3.3V
15
RESET
16
2.5V
17
SCL[D_DEMOD]
18
SDA[D_DEMOD]
19
ERR
20
SYNC
21
VALID
22
MCL
23
D0
24
D1
25
D2
26
D3
27
D4
28
D5
29
D6
30
D7
31
SHIELD
R2710
0
CN
R2716
0
CN
R2707
0
CN
R2705
0
CN
R2704
0
CN
R2709
0
CN
R2703
0
CN
R2706
0
CN
R2717
0
CN
R2711
0
CN
R2708
0
CN
R2713-*1
56K
56K
1/8W
1%
1%
CN
R2731-*1
0
0
1/16W
5%
5%
CN
R2756-*1
30K
30K
1/10W
1%
1%
CN
TU2701-*2
TDFR-C155D
CN_VERTICAL_LGS8G85
1
RF_S/W_CNTL
2
BST_CNTL
3
+B1[+5V]
4
NC[RF_AGC]
5
NC_1
6
SCLT
7
SDAT
8
NC_2
9
SIF
10
NC_3
11
VIDEO
12
GND
13
+B2[1.2V]
14
+B3[3.3V]
15
RESET
16
NC_4
17
SCL
18
SDA
19
ERR
20
SYNC
21
VALID
22
MCL
23
D0
24
D1
25
D2
26
D3
27
D4
28
D5
29
D6
30
D7
31
SHIELD
TU2701-*3
TDFR-C135D
CN_HORIZONTAL_LGS8G85
1
RF_S/W_CNTL
2
BST_CNTL
3
+B1[+5V]
4
NC[RF_AGC]
5
NC_1
6
SCLT
7
SDAT
8
NC_2
9
SIF
10
NC_3
11
VIDEO
12
GND
13
+B2[1.2V]
14
+B3[3.3V]
15
RESET
16
+B4[2.5V]
17
SCL
18
SDA
19
ERR
20
SYNC
21
VALID
22
MCL
23
D0
24
D1
25
D2
26
D3
27
D4
28
D5
29
D6
30
D7
31
SHIELD
R2756
18K
18K
1%
EU
C2735
22uF
22uF
10V
R2709-*1
47
47
EU
R2708-*1
47
47
EU
R2717-*1
47
47
EU
R2704-*1
47
47
EU
R2716-*1
47
47
EU
R2705-*1
47
47
EU
R2711-*1
47
47
EU
R2710-*1
47
47
EU
R2703-*1
47
47
EU
R2707-*1
47
47
EU
R2706-*1
47
47
EU
IC2702
NL17SZ08DFT2G
3
2
4
1
5
FE_TS_ERR
+3.3V_TU
FE_TS_VAL_ERR
R2758
47
47
R2757
0
CN
R2757-*1
47
47
EU
FE_TS_ERR
FE_TS_VAL
C2736
0.1uF
16V
TU2701-*4
TDFR-G055D
EU_VERTICAL_NIM_T2
1
RF_S/W_CNTL
2
BST_CNTL
3
+B1[5V]
4
NC[RF_AGC]
5
AS
6
SCL[A_DEMOD]
7
SDA[A_DEMOD]
8
NC(IF_TP)
9
SIF
10
NC
11
VIDEO
12
GND
13
1.2V
14
3.3V
15
RESET
16
2.5V
17
SCL[D_DEMOD]
18
SDA[D_DEMOD]
19
ERR
20
SYNC
21
VALID
22
MCL
23
D0
24
D1
25
D2
26
D3
27
D4
28
D5
29
D6
30
D7
31
SHIELD
TU2701-*5
TDFR-G035D
EU_HORIZONTAL_NIM_T2
1
RF_S/W_CNTL
2
BST_CNTL
3
+B1[5V]
4
NC[RF_AGC]
5
NC_1
6
SCLT
7
SDAT
8
NC(IF_TP)
9
SIF
10
NC_2
11
VIDEO
12
GND
13
+B2[1.2V]
14
+B3[3.3V]
15
RESET
16
+B4[2.5V]
17
SCL[D_DEMOD]
18
SDA[D_DEMOD]
19
ERR
20
SYNC
21
VALID
22
MCL
23
D0
24
D1
25
D2
26
D3
27
D4
28
D5
29
D6
30
D7
31
SHIELD
close to TUNER
60mA
close to TUNER
Close to the tuner
OPTION : RF AGC
$0.11
CAN H-NIM/NIM TUNER for EU
200mA
Close to IC
R2
3A
R1
Vout=0.8*(1+R1/R2)
27
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