LG 42LD320H (CHASSIS:LD91X) Service Manual ▷ View 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
FE_TS_DATA[0]
FE_TS_CLK
FE_TS_SYN
FE_TS_VAL
+5V_GENERAL
+3.3V_TUNER
+5V_GENERAL
FE_BOOSTER_CTL
/FE_RESET
FE_TS_DATA[0],FE_TS_CLK,FE_TS_VAL,FE_TS_SYN
FE_DEMOD_SDA
+1.2V_TUNER
Q1200
2SC3052
E
B
C
FE_AGC_SPEED_CTL
FE_TS_ERR
Q1203
2SC3052
E
B
C
+3.3V_TUNER
FE_TUNER_SDA
FE_SIF
+5V_TUNER
FE_DEMOD_SCL
FE_TUNER_SCL
FE_TS_VAL
IC1201
NL17SZ08DFT2G
3
2
4
1
5
FE_TS_ERR
+3.3V_TUNER
FE_TS_VAL_ERR
GND
FE_TS_VAL
FE_VMAIN
+5V_GENERAL
L1202
MLB-201209-0120P-N2
L1201
MLB-201209-0120P-N2
L1204
MLB-201209-0120P-N2
C1212
47uF
16V
47uF
16V
R1238
0
R1241
200
R1240
200
R1239
1K
OPT
R1205
0
R1208
47
R1207
47
C1205
47pF
50V
OPT
47pF
50V
OPT
C1206
47pF
50V
OPT
47pF
50V
OPT
C1220
0.1uF
0.1uF
16V
C1215
0.1uF
16V
16V
Q1201
ISA1530AC1
E
B
C
Q1205
ISA1530AC1
E
B
C
Q1202
ISA1530AC1
E
B
C
C1209
68uF
10V
10V
R1223
0
C1222
0.01uF
25V
0.01uF
25V
C1208
0.1uF
16V
0.1uF
16V
OPT
C1210
0.1uF
16V
16V
C1219
0.1uF
16V
C1214
0.1uF
16V
0.1uF
16V
C1227
0.1uF
16V
C1200
0.1uF
16V
C1221
0.1uF
0.1uF
16V
R1229
10
R1224
100
100
R1225
100K
C1216
100pF
50V
C1207
100pF
50V
100pF
50V
R1209
10K
10K
R1231
10K
R1232
10K
10K
R1230
2.2K
2.2K
R1222
33
R1221
33
33
R1226
4.7K
4.7K
R1218 47
R1210 47
R1219 47
R1220 47
R1245
47
R1227
470
C1217
47pF
50V
47pF
50V
C1218
47pF
50V
47pF
50V
R1228
82
82
TU1200
TDFW-G235D
TUNER
1
ANT[5V]
2
BB[CTR]
3
GND_1
4
+B[5V]
5
NC_1
6
RF_AGC
7
TP[VT]
8
NC_2
9
GND_2
10
SDA_T
11
SCL_T
12
AIF_1
13
NC_3
14
GND
15
VIDEO
16
NC_4
17
SIF
18
SDA
19
SCL
20
RST
21
3.3V
22
1.2V
23
ERR
24
MCL
25
D7
26
D6
27
D5
28
D4
29
D3
30
D2
31
D1
35
SHIELD
32
D0
33
VAL
34
SYNC
L1203
MLB-201209-0120P-N2
+5V_TUNER
C1223
0.1uF
16V
0.1uF
16V
Tuner PLL : 0xC2
Analog Tuner : 0x86
Digital Tuner : 0x1E
10 12
TUNER
OPTION : RF AGC
DVB-CI DETECT
DVB-T/C : 1.2V(MICRONAS demod)
DVB-T : 1.8V(INTEL demod)
EAX62121501
2010.03.10
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.
LVB_3M
LVB_0M
LVB_1P
LVB_2M
LVB_CKP
LVB_CKM
LVB_4P
LVB_0P
LVB_2P
PANEL_POWER
LVB_1M
LVB_4M
LVB_3P
LVA_CKM
LVA_3P
LVA_0P
LVA_4M
LVA_2M
LVA_0M
LVA_1M
LVA_2P
LVA_1P
LVA_3M
LVA_CKP
LVA_4P
R1370
3.3K
OPT
R1379
0
0
LVDS_SEL_GND
R1371
0
BIT_SEL_GND(8bit)
R1366
22
R1365
22
LVDS_SEL
R1367
22
22
OPT
R1373
0
OPT
BIT_SEL
LVB_CKP
LVB_CKM
LVB_1M
LVB_0M
LVB_3M
LVB_2M
LVB_0P
LVB_3P
LVB_2P
LVB_1P
+3.3V
OPC_EN
OPC_OUT
PWM_DIM
+3.3V
+3.3V
L1300
BLM18PG121SN1D
C1300
0.1uF
0.1uF
16V
R1313
OPT
R1315
OPT
R1312
OPT
R1314
OPT
C1301
1000pF
50V
P1301
TF05-51S
FHD
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
P1302
FF10001-30
LVDS_HD_26~42"
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
R1378
3.3K
3.3K
LVDS_SEL_PULLUP
R1372
510
OPC
R1380
0
@optio
R1381
0
@optio
ZD1305
5.6V
AMOTECH
ZD1300
5.6V
AMOTECH
19~26"
ZD1302
5.6V
AMOTECH
32~52"
+5V_ST
L1302
BLM18PG121SN1D
19~26"
L1303
BLM18PG121SN1D
32~52"
C1307
0.1uF
32~52"
R1303
47K
47K
Q1300
2SC3052
E
B
C
ZD1304
5.6V
AMOTECH
32~52"
R1305
100
100
L1305
BLM18PG121SN1D
R1318
100
100
C1314
0.1uF
16V
P1303
12507WR-03L
19~26"
1
KEY1
2
KEY2
3
GND
4
C1312
1000pF
50V
KEY2
P1305
12507WS-08L
1
KEY1
2
KEY2
3
GND
4
5V_ST
5
GND
6
IR
7
LED_B
8
LED_R
9
.
+5V_ST
L1301
BLM18PG121SN1D
R1302
10K
ZD1301
5.6V
AMOTECH
19~26"
+5V_ST
Q1301
2SC3052
E
B
C
R1319
4.7K
4.7K
C1308
0.1uF
16V
0.1uF
16V
19~26"
L1304
BLM18PG121SN1D
19~26"
L1307
BLM18PG121SN1D
L1306
BLM18PG121SN1D
C1315
1000pF
50V
IR_OUT
ZD1303
5.6V
AMOTECH
C1309
100pF
100pF
50V
C1305
0.1uF
32~52"
LED_B
C1306
0.1uF
0.1uF
16V
19~26"
+5V_ST
C1313
1000pF
50V
LED_R
R1300
22
KEY1
R1320
4.7K
ZD1306
5.6V
AMOTECH
R1317
100
100
R1142
4.7K
4.7K
IR_OUT_HDMI1
IR_OUT_HDMI2
R1130
22
IR_OUT_PC
IC1100
74AC08SJ
3
O0
2
B0
4
A1
1
A0
6
O1
5
B1
7
GND
8
O3
9
B3
10
A3
11
O2
12
B2
13
A2
14
VCC
MEMC_RESET
MEMC_SCL
MEMC_SDA
MST_IR
Q1121
2SC3052
2SC3052
E
B
C
R1133
10K
R1132
10K
R1131
10K
+5V_ST
IR_OUT_CTRL
NEC_IR
R1304
100K
R1308
0
0
+5V_ST
IC1101
PC17L1(5V/35V 4P)
PHOTO Coupler
2
1
3
4
Q1302
KRC102S
KRC102S
PHOTO Coupler
E
B
C
IR_OUT_PC
R1382
33K
1/16W
5%
PHOTO Coupler
R1383
10K
1/16W
5%
PHOTO Coupler
IR_OUT_RS232C
BOX_5V
C1316
0.1uF
PHOTO Coupler
IR_OUT
R
1
3
0
1
1
0
K
1
/
1
6
W
5
%
R1384
22 NOT PHOTO Coupler
IR_OUT_RS232C
R1306
100
100
PHOTO Coupler
11 12
MODULE&CTL
Module
V4 OPTION
OPC_OUTPUT
OPC_EABLE
External VBR
X
8BIT
R1370
10BIT
X
R1371
0
R1378
HD
O
FHD
R1379
X
O
X
X
IR & LED
CONTROL
Zener Diode is
close to wafer
IR_OUT
AUO10
X
X
IR_Photocoupler
EAX62121501
2010.03.10
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.
BUZZ_PWM
R1428
47K
SUB_EEPROM
NEC_EEPROM_SCL
C1402
0.1uF
SUB_EEPROM
NEC_EEPROM_SDA
R1431
22
SUB_EEPROM
R1432
22
SUB_EEPROM
+5V_ST
R1433
47K
SW1400
JTP-1127WEM
1
2
4
3
EDID_WP
Q1400
2SC3052
E
B
C
IC1404
KID65003AF
3
I3
2
I2
4
I4
1
I1
6
I6
5
I5
7
I7
8
GND
9
COMMON
10
O7
11
O6
12
O5
13
O4
14
O3
15
O2
16
O1
Q1406
2SA1504S
E
B
C
R1450
10
10
R1451
10
10
R1452
10
10
Q1407
2SA1504S
E
B
C
R1453
10
10
R1454
10
10
Q1408
2SA1504S
E
B
C
Q1409
2SA1504S
E
B
C
R1455
10
10
R1456
10
10
P1400
12507WS-12L
1
2
3
4
5
6
7
8
9
10
11
12
13
+5V_ST
Q1410
2SA1504S
E
B
C
CLOCK_SCL
CLOCK_SDA
+5V_ST
R1400
4.7K
R1401
4.7K
R1404
22
22
R1405
22
R1408
22
HDMI_CEC
R1409
10K
R1410
22
SOC_RESET
R1411
22 OPT
R1412
22 OPT
R1413
22
INV_CTL
PANEL_CTL
POWER_ON/OFF1
R1414
10K
10K
OPT
+5V_ST
R1415
22
NEC_IR
R1416
22
R1417
22
R1418
22
R1419
22
NEC_RX
NEC_TX
MST_NEC_RX
+5V_ST
R1420
22
MICOM_RESET
TOOL0
TOOL1
FLMD0
R1422
100K
100K
R1423
22
R1424
22
R1425
22
R1426
22
OPT
P1401
12507WS-06L
1
2
3
4
5
6
7
+5V_ST
MICOM_RESET
TOOL0
TOOL1
FLMD0
R1457
22
R1458
22
R1459
22
R1460
4.7K
4.7K
R1464
4.7K
4.7K
KEY1
KEY2
EXT5V_CTRL
EXT12V_CTRL
EXT_PWR_DET
POWER_DET
R1461
0
LED_R
LED_B
+5V_ST
C1403
0.1uF
16V
R1462
0
R1463
0
0
S6_EEPROM_SCL
C1405
1uF
50V
1uF
50V
NEC_EEPROM_SCL
S6_EEPROM_SDA
C1406
0.1uF
0.1uF
R1469
0
0
OPT
NEC_EEPROM_SDA
R1470
0
0
OPT
IC1403
NLASB3157DFT2G
EAN38256201
ANALOG SWITCH
ON SEMICONDUCTOR
3
B0
2
GND
4
A
1
B1
6
SELECT
5
VCC
+5V_ST
IC1402
NLASB3157DFT2G
EAN38256201
ANALOG SWITCH
ON SEMICONDUCTOR
3
B0
2
GND
4
A
1
B1
6
SELECT
5
VCC
EEPROM_SCL
EEPROM_SDA
R1421
1M
+5V_GENERAL
R1475
22
IR_OUT_CTRL
X1400
10MHz
C1400
13pF
C1401
13pF
IC1405
74LX1G14CTR
3
GND
2
1A
4
1Y
1
NC
5
VCC
BU1400
PKLCS1212E4001-R1
1
2
C1408
0.1uF
16V
0.1uF
16V
+5V_ST
RTC_INT
R1434
22
R1402
4.7K
R1403
4.7K
4.7K
+5V_ST
NEC_EEPROM_SCL
NEC_EEPROM_SDA
R1406
22
R1407
22
R1490
22
OPT
R1491
22
OPT
R1478
22
OPT
R1479
22
OPT
R1480
22
OPT
R1481
22
OPT
R1482
22
OPT
R1483
22
R1484
22
OPT
R1486
22
OPT
R1485
22
OPT
R1488
22
R1487
22
R1489
22
UART_DBG_SW
UART_SW1
NEC_DBG_RX
R1429
22
NEC_DBG_TX
R1427
22
DBG_SW
UART_SW2
R
1
4
6
6
4
.
7
K
OPT
L1400
BLM18PG121SN1D
C1410
0.1uF
16V
C1411
2.2uF
10V
2.2uF
10V
STBY_MUTE_NTP
STBY_MUTE_TPA
L1403
BLM18PG600SN1D
L1404
BLM18PG600SN1D
SUB_EEPROM
R1476
22
OPT
R1659
0
0
+3.3V
BSS83
Q1401
S
B
D
G
R1493
4.7K
4.7K
+5V_ST
R1494
4.7K
R1495
0
OPT
0
OPT
MST_NEC_TX
EEPROM_SW
R1496
22
EEPROM_SW
IC1400
UPD78F1164GF(S)
1
P60/SCL0
2
P61/SDA0
3
P62
4
P63
5
P31/TI03/TO03/INTP4
6
P64/RD
7
P65/WR0
8
P66/WR1
9
P67/ASTB
10
P77/EX23/KR7/INTP11
11
P76/EX22/KR6/INTP10
12
P75/EX21/KR5/INTP9
13
P74/EX20/KR4/INTP8
14
P73/EX19/KR3
15
P72/EX18/KR2
16
P71/EX17/KR1
17
P70/EX16/KR0
18
P06/WAIT
19
P05/CLKOUT
20
EVSS1
21
P80/EX0
22
P81/EX1
23
P82/EX2
24
P83/EX3
25
P84/EX4
26
P85/EX5
27
P86/EX6
28
P87/EX7
29
P30/INTP3/RTC1HZ
30
EVDD1
31
P50/EX8
32
P51/EX9
33
P52/EX10
34
P53/EX11
35
P54/EX12
36
P55/EX13
37
P56/EX14
38
P57/EX15
39
P17/EX31/TI02/TO02
40
P16/EX30/TI01/TO01/INTP5
41
P15/EX29/RTCDIV/RTCCL
42
P14/EX28/RXD3
43
P13/EX27/TXD3
44
P12/EX26/SO00/TXD0
45
P11/EX25/SI00/RXD0
46
P10/EX24/SCK00
47
AVREF1
48
P110/ANO0
49
P111/ANO1
50
AVREF0
51
AVSS
52
P157/ANI15
53
P156/ANI14
54
P155/ANI13
55
P154/ANI12
56
P153/ANI11
57
P152/ANI10
58
P151/ANI9
59
P150/ANI8
60
P27/ANI7
61
P26/ANI6
62
P25/ANI5
63
P24/ANI4
64
P23/ANI3
65
P22/ANI2
66
P21/ANI1
67
P20/ANI0
68
P130
69
P131/TI06/TO06
70
P04/SCK10/SCL10
71
P03/SI10/RXD1/SDA10
72
P02/SO10/TXD1
73
P01/TO00
74
P00/TI00
75
P145/TI07/TO07
76
P144/SO20/TXD2
77
P143/SI20/RXD2/SDA20
78
P142/SCK20/SCL20
79
P141/PCLBUZ1/INTP7
80
P140/PCLBUZ0/INTP6
81
P120/INTP0/EXLVI
82
P47/INTP2
83
P46/INTP1/TI05/TO05
84
P45/SO01
85
P44/SI01
86
P43/SCK01
87
P42/TI04/TO04
88
P41/TOOL1
89
P40/TOOL0
90
RESET
91
P124/XT2
92
P123/XT1
93
FLMD0
94
P122/X2/EXCLK
95
P121/X1
96
REGC
97
VSS
98
EVSS0
99
VDD
100
EVDD0
R1472
100
R1471
100
R1474
100
R1473
100
RJP_CTRL_2
RJP_CTRL_0
RJP_CTRL_1
RJP_CTRL_3
IC1401
M24C16-WMN6T
SUB_EEPROM
3
NC/E2
2
NC/E1
4
VSS
1
NC/E0
5
SDA
6
SCL
7
WC
8
VCC
EEPROM for Micom
B1 - A
CONNECTION
SELECT
L
B0 - A
H
Closed to Crystal
12 12
NEC SUBMICOM
EAX62121501
2010.03.10
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