Read LG 47LX9550-CA (CHASSIS:LC03M) Service Manual online
THERMAL
THERMAL
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.
CHB_TUNER_CN
CI_OUTDATA[1]
CI_OUTDATA[7]
MAIN_FE_TS_VAL_ERR
CI_OUTDATA[0]
MAIN_FE_TS_DATA[2]
CI_OUTDATA[4]
CI_OUTCLK
CI_OUTVALID
CI_OUTDATA[2]
MAIN_FE_TS_SYNC
MAIN_FE_TS_DATA[4]
CI_OUTDATA[5]
CI_OUTSTART
MAIN_FE_TS_DATA[6]
MAIN_FE_TS_DATA[3]
MAIN_FE_TS_DATA[0]
MAIN_FE_TS_DATA_CLK
MAIN_FE_TS_DATA[5]
CI_OUTDATA[6]
MAIN_FE_TS_DATA[7]
MAIN_FE_TS_DATA[1]
CI_OUTDATA[3]
MAIN_FE_TS_SYNC
MAIN_FE_TS_VAL_ERR
MAIN_FE_TS_DATA_CLK
MAIN_FE_TS_DATA[0]
MAIN_FE_TS_DATA[1]
MAIN_FE_TS_DATA[2]
MAIN_FE_TS_DATA[3]
MAIN_FE_TS_DATA[4]
MAIN_FE_TS_DATA[6]
MAIN_FE_TS_DATA[5]
MAIN_FE_TS_DATA[7]
R1407
22
TU_SIF
MAIN_FE_TS_DATA[0-7],MAIN_FE_TS_SYNC,MAIN_FE_TS_VAL_ERR,MAIN_FE_TS_DATA_CLK
R1406
22
Q1401
ISA1530AC1
E
B
C
+3.3V_TU
+1.2V_TU
R1405
22
R1415
100
100
Q1404
2SC3052
E
B
C
SCL0_3.3V
R1412
22
TU_CVBS
R1403
22
R1414
0
Q1405
ISA1530AC1
E
B
C
R1413
22
R1428
4.7K
4.7K
R1418
33
R1411
22
C1412
18pF
50V
18pF
50V
C1402
0.1uF
16V
0.1uF
16V
C1407
0.1uF
16V
16V
R1421
0
R1416
100K
R1424
2.2K
2.2K
R1410
22
C1414
0.01uF
25V
0.01uF
25V
Q1402
ISA1530AC1
E
B
C
C1400
100pF
50V
100pF
50V
SDA0_3.3V
C1405
100pF
50V
100pF
50V
C1404
0.1uF
16V
0.1uF
16V
TUNER_RESET
+5V_TU
C1408
0.1uF
16V
16V
C1411
0.1uF
16V
R1431
82
82
+3.3V_TU
C1403
0.1uF
16V
R1419
33
C1406
100pF
50V
100pF
50V
L1400
BLM18PG121SN1D
+5V_TU
R1427
10K
+5V_TU
R1409
22
R1408
22
C1413
18pF
50V
18pF
50V
R1420
0
+5V_TU
RF_SWITCH_CTL
R1429
10K
10K
LNA2_CTL/BOSTER_CTL
R1402
0
R1422
200
R1425
200
R1430
470
R1404
22
MAIN_FE_TS_DATA[0-7],MAIN_FE_TS_SYNC,MAIN_FE_TS_VAL_ERR,MAIN_FE_TS_DATA_CLK
AR1400
22
AR1402
22
C1415
0.1uF
Q1406
2SC3875S(ALY)
E
B
C
/CI_SEL
001:F8
IC1400
74LVC16244ADGG
26
4A3
27
4A2
28
GND_5
29
4A1
30
4A0
31
VCC_3
32
3A3
33
3A2
34
GND_6
35
3A1
36
3A0
37
2A3
38
2A2
39
GND_7
40
2A1
41
2A0
42
VCC_4
43
1A3
44
1A2
45
GND_8
46
1A1
47
1A0
48
2OE
17
3Y4
3
1Y1
6
1Y3
16
3Y2
15
GND_3
14
3Y1
13
3Y0
12
2Y3
11
2Y2
10
GND_2
9
2Y1
8
2Y0
7
VCC_1
4
GND_1
5
1Y2
25
3OE
24
4OE
23
4Y3
2
1Y0
22
4Y2
21
GND_4
1
1OE
20
4Y1
19
4Y0
18
VCC_2
+3.3V_TU
CI_OUTCLK,CI_OUTDATA[0-7],CI_OUTSTART,CI_OUTVALID
R1435
47K
+3.3V_TU
C1425
0.1uF
AR1401
22
C1426
0.1uF
R1440
4.7K
C1416
0.1uF
R1437
10K
SCL2_3.3V
R1453
22
R1450
33
+5V_TU_CHB
C1431
10pF
50V
C1434
0.1uF
0.1uF
16V
TU_CVBS_CHB
Q1408
ISA1530AC1
E
B
C
C1432
10pF
50V
R1455
22
C1435
100pF
100pF
50V
+5V_TU_CHB
SDA2_3.3V
C1439
100pF
100pF
50V
C1433
0.1uF
16V
R1446
200
R1447
200
FE_TS_VAL_ERR_CHB
R1458
0
+1.2V_TU_CHB
C1446
0.1uF
16V
0.1uF
16V
Q1407
ISA1530AC1
E
B
C
C1436
100pF
100pF
50V
C1437
0.1uF
16V
FE_TS_CLK_CHB
RF_SWITCH_CTL_CHB
FE_TS_SYNC_CHB
R1452
22
R1449
33
SC1_CVBS_IN
R1448
200
R1456
22
OPT
R1444
75
1%
+3.3V_TU_CHB
R1445
200
FE_TS_DATA_CHB
R1460
0
+5V_TU_CHB
R1454
22
TUNER_RESET_CHB
IF_AGC_SEL
R1474
0
C1443
22uF
10V
+3.3V_TU
C1442
0.1uF
16V
+5V_NORMAL
L1402
BLM18PG121SN1D
C1422
22uF
10V
L1405
BLM18PG121SN1D
C1424
22uF
10V
C1419
0.1uF
16V
C1421
0.1uF
16V
+5V_TU_CHB
C1417
0.1uF
0.1uF
16V
C1444
22uF
10V
C1420
0.1uF
16V
+5V_TU
+3.3V_NORMAL
L1404
CIC21J501NE
+3.3V_TU_CHB
C1423
22uF
10V
C1441
0.1uF
16V
C1445
22uF
10V
R1471
100
C1463
0.1uF
16V
TUNER_RESET_CHB
+12V
C1477
100pF
50V
OPT
IC1402
AOZ1073AIL
3
AGND
2
VIN
4
FB
1
PGND
5
COMP
6
EN
7
LX_1
8
LX_2
C1478
0.1uF
16V
0.1uF
16V
R1488
4.7K
1%
R1487
27K
1%
L1407
3.6uH
3.6uH
NR8040T3R6N
C1482
10uF
25V
10uF
25V
C1481
10uF
25V
10uF
25V
L1408
CIC21J501NE
R1489
10K
1%
C1479
22uF
10V
22uF
10V
C1480
0.1uF
16V
0.1uF
16V
R1484
10K
L1406
+3.3V_TU
POWER_ON/OFF2_2
C1401
100uF
16V
TU1501
TDFD-C055D [MAIN]
TUNER_CHB_MAIN
1
CTR1[SUB]
2
CTR2[MAIN]
3
+B1[5V]
4
NC[RF_AGC]
5
BST_CTR
6
SCLT[A_DEMOD]
7
SDAT[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[LS_IC]
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
TU1502
TDFD-C075D [SUB]
TUNER_CHB_SUB
3
+B1[5V]
4
NC[RF_AGC]
5
BST_CTR
6
SCLT[A_DEMOD]
7
SDAT[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[LS_IC]
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
R1461
0
MODEL_OPT_5
CHB_Booster_IN
CHB_Booster_CTL
Q1410
ISA1530AC1
E
B
C
R1464
10K
CHB_Booster_IN
R1462
0
R1465
10K
10K
C1430
0.01uF
25V
0.01uF
25V
Q1409
2SC3052
E
B
C
R1463
2.2K
2.2K
L1409
BLM18PG121SN1D
+5V_NORMAL
CHB_Booster_CTL
R1401
0
OPT
TU1501-*1
TDFD-C056D [MAIN]
TUNER_NON_CHB_MAIN
1
CTR1[SUB]
2
CTR2[MAIN]
3
+B1[5V]
4
NC[RF_AGC]
5
BST_CTR
6
SCLT[A_DEMOD]
7
SDAT[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[LS_IC]
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
R1481
27K
C1476
3300pF
0.1uF
C1466
OPT
C1469
10uF
10V
R1436
9.1K
5%
9.1K
5%
SEMTEK
R1439
0
5%
0
5%
SEMTEK
R1433
10K SEMTEK
10K SEMTEK
L1410
500
BCD
R1432
10K
10K
BCD
R1438-*1
20K
1%
20K
1%
BCD
0.1uF
C1465
0.1uF
C1468
IC1401-*1
SC4215ISTRT
SEMTEK
3
VIN
2
EN
4
NC_2
1
NC_1
5
NC_3
6
VO
7
ADJ
8
GND
C1464
10uF
10V
R1436-*1
39K
1%
39K
1%
BCD
R1434
10K
10K
BCD
IC1401
AP2132MP-2.5TRG1
BCD
3
VIN
2
EN
4
VCTRL
1
PG
5
NC
6
VOUT
7
ADJ
8
GND
9
[EP]
R1439-*1
20K
1%
20K
1%
BCD
0.1uF
C1467
OPT
R1438
5.1K
5%
5.1K
5%
SEMTEK
+5V_NORMAL
+3.3V_TU
+1.2V_TU
+5V_NORMAL
R1470
0
5%
0
5%
SEMTEK
R1472-*1
39K
1%
39K
1%
BCD
IC1403
AP2132MP-2.5TRG1
BCD
3
VIN
2
EN
4
VCTRL
1
PG
5
NC
6
VOUT
7
ADJ
8
GND
9
[EP]
R1468
10K
10K
BCD
L1411
500
BCD
R1467
10K SEMTEK
10K SEMTEK
R1469
5.1K
5%
5.1K
5%
SEMTEK
C1475
10uF
10V
R1469-*1
20K
1%
20K
1%
BCD
R1466
10K
10K
BCD
R1470-*1
20K
1%
20K
1%
BCD
IC1403-*1
SC4215ISTRT
SEMTEK
3
VIN
2
EN
4
NC_2
1
NC_1
5
NC_3
6
VO
7
ADJ
8
GND
0.1uF
C1473
OPT
0.1uF
C1474
0.1uF
C1471
C1470
10uF
10V
0.1uF
C1472
OPT
R1472
9.1K
5%
9.1K
5%
SEMTEK
+3.3V_TU_CHB
+1.2V_TU_CHB
close to TUNER
close to TUNER
Close to the tuner
27
MAIN
SUB
Close to the tuner
close to TUNER
BUFFER FOR MAIN TS_OUTPUT
TUNER FOR CHB_CHINA
R1
Vout=(1+R1/R2)*0.8
R2
2A
3A
+3.3V_Normal
SEMTEK VOUT : 1.248V
BCD:Vout=0.6*(1+R1/R2)
R1
SEMTEK:Vout=0.8*(1+R1/R2)
R2
BCD VOUT : 1.215V
SEMTEK VOUT : 1.248V
BCD:Vout=0.6*(1+R1/R2)
R1
R2
SEMTEK:Vout=0.8*(1+R1/R2)
BCD VOUT : 1.215V
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