LG 42LG3RC (CHASSIS:LP81F) 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.
220K
R133
75
R121
75
R111
SD05
D105
220K
R108
COMP1_R
COMP1_Pb
PC_AUD_R
CDS3C05GTA
5.6V
D122
COMP1_Y
SD05
30V
D117
75
R123
5.6V
D103
COMP2_Pr
CDS3C05GTA
5.6V
D123
PPJ209-02
JK100
4A
[GN]CONTACT
2A
[GN]1P_CAN
3A
[GN]O_SPRING
2B
[BL]1P_CAN
5B
[BL]C_LUG_L
2C
[RD]1P_CAN1
5C
[RD]C_LUG_L
2D
[WH]1P_CAN
5D
[WH]C_LUG_L
2E
[RD]1P_CAN2
4E
[RD]CONTACT
3E
[RD]O_SPRING
SD05
D106
5.6V
D104
COMP2_L
220K
R119
COMP1_Pr
COMP1_L
75
R122
75
R110
220K
R106
220K
R120
COMP2_Pb
PPJ209-02
JK101
4A
[GN]CONTACT
2A
[GN]1P_CAN
3A
[GN]O_SPRING
2B
[BL]1P_CAN
5B
[BL]C_LUG_L
2C
[RD]1P_CAN1
5C
[RD]C_LUG_L
2D
[WH]1P_CAN
5D
[WH]C_LUG_L
2E
[RD]1P_CAN2
4E
[RD]CONTACT
3E
[RD]O_SPRING
30V
D119
SD05
1000-ohm
L100
PC_AUD_L
COMP2_R
220K
R132
SD05
30V
D118
1000-ohm
L101
SD05
D107
COMP2_Y
75
R109
5.6V
D115
5.6V
D116
10K
R136
10K
R143
10K
R144
12K
R142
12K
R145
12K
R137
10K
R134
12K
R135
10K
R138
10K
R140
12K
R139
12K
R141
68
R114
DSUB_SCL
75
R116
CDS3C30GTH
30V
D112
DSUB_SDA
+5V_ST
CDS3C30GTH
30V
D110
100
R125
+5V_MULTI
75
R117
DSUB_SDA
DSUB_SCL
0.1uF
C100
PC_G
CDS3C30GTH
30V
D114
0.1uF
C102
75
R118
4.7K
R112
68
R115
0.1uF
C101
PC_R
PC_B
PC_VS
68pF
C103
PC_HS
0.1uF
C105
4.7K
R113
68pF
C104
CDS3C30GTH
30V
D113
100
R124
100
R128
4.7K
R150
READY
+5V_ST
100
R129
100
R130
0.1uF
C110
0.1uF
C106
100
R131
OPT
C111
TXD
0.1uF
C108
0.1uF
C109
OPT
C112
RXD
CDS3C30GTH
30V
D121
0.1uF
C107
4.7K
R151
READY
+3.3V_MST
CDS3C30GTH
30V
D120
+5V_ST
ENKMC2837-T112
D109
A
A C
C
ENKMC2837-T112
D111
A
A C
C
ENKMC2837-T112
D108
A
A C
C
MAX3232CDR
IC101
RS232C
3
C1-
2
V+
4
C2+
1
C1+
6
V-
5
C2-
7
DOUT2
8
RIN2
9
ROUT2
10
DIN2
11
DIN1
12
ROUT1
13
RIN1
14
DOUT1
15
GND
16
VCC
PEJ024-01
JK102
6B
T_TERMINAL2
8
SHIELD_PLATE
7B
B_TERMINAL2
5
T_SPRING
4
R_SPRING
7A
B_TERMINAL1
6A
T_TERMINAL1
3
E_SPRING
IR_OUT
4.7K
R127
4.7K
R126
6630TGA004K
KCN-DS-1-0089
JK104
1
RED
2
GREEN
3
BLUE
4
GND_1
5
DDC_GND
6
RED_GND
7
GREEN_GND
8
BLUE_GND
9
NC
10
SYNC_GND
11
GND_2
12
DDC_DATA
13
H_SYNC
14
V_SYNC
15
DDC_CLOCK
16
SHILED
KCN-DS-1-0088
JK103
1
2
3
4
5
6
7
8
9
10
AT24C02BN-10SU-1.8
IC100
3
A2
2
A1
4
GND
1
A0
5
SDA
6
SCL
7
WP
8
VCC
1000pF
READY
C113
0
R146
1000pF READY
C114
0
R147
1000pF READY
C115
0
R148
1000pF READY
C116
0
R149
COMPONENT2
SDC 15 applying check
PC SOUND
COMPONENT1
1 11
2008/01/08
INPUT1
INPUT1 : COMP1/2,RS232C,PC
MSTAR LP81A
PC
RS-232C
*ONLY LG30
1.24C02-SUB:0IMMRAL014D
**MULTI ITEM
2.ENKMC2837-SUB:0DS226009AA
(KDS226)
SUB : 0IMCRSG010A(STM)
MAIN : EAN41348201(TI)
*RS232C TX
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.
5.6V
D216
220K
R244
SIDE_RIN
75
R241
SD05
D214
SIDE_V
220K
R242
SIDE_LIN
5.6V
D215
75
R245
SIDE_Y
75
R246
SIDE_C
SD05
D217
SD05
D218
S_VIDEO_DET
SD05
D219
12K
R248
12K
R250
10K
R247
10K
R249
OPT
C210
READY
PPJ218-01
JK204
5C
[RD]CONTACT
2C
[RD]U_CAN
4C
[RD]O_SPRING
2B
[WH]U_CAN
3B
[WH]C_LUG
2A
[YL]U_CAN
5A
[YL]CONTACT
4A
[YL]O_SPRING
PSJ015-02
JK205
5
O_SPRING
4A
C_LUG_L_1
4B
C_LUG_S_1
4C
C_LUG_L_2
4D
C_LUG_S_2
3
GROUND
7
SHIELD
0.1uF
16V
READY
C213
0
R252
0
R251
100pF
50V
READY
C214
100pF
50V
READY
C215
75
R208
100pF
50V
C212
OPT
0
R210
470K
R229
OPT
RT1C3904-T112
Q203
OPT
E
B
C
SD05
D201
SPK_R-_HOTEL
5.6V
D208
OPT
470K
R230
OPT
100pF
50V
C211
OPT
PPJ148-10
JK200
4A
[RD]O_SPRING
2A
[RD]1P_CAN
5A
[RD]CONTACT
2
[WH]1P_CAN
3
[WH]C_LUG_L
2B
[YL]1P_CAN
4B
[YL]O_SPRING
5B
[YL]CONTACT
12K
R219
220K
R212
0
R214
10K
R218
0
R222
100pF
50V
C216
OPT
5.6V
D209
OPT
MNT_ROUT
MNT_LOUT
0
R211
OPT
C207
CVBS_RIN
12K
R221
1K
R236
OPT
CVBS_LIN
AUDIO_R
10K
R220
10uF
16V
C209
MUTE_LINE
PPJ200-01
JK201
2
1
3
4
5
1K
R237
OPT
220K
R209
SPK_R+_HOTEL
100pF
50V
C217
OPT
10uF
16V
C208
OPT
CVBS_VIN
0
R213
5.6V
D202
RT1C3904-T112
Q202
OPT
E
B
C
5.6V
D204
0
R223
2 11
INPUT2
MSTAR N-EU
INPUT2 : CVBS,SIDE AV
SIDE AV
2008/01/08
POP NOISE
CVBS
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.
TMDS3_RX2-
TMDS3_RXC-
HPD_S/W_2
TMDS2_RXC-
1K
R319
+5V_HDMI_2
HDMI_SEL1
TMDS3_RXC-
HDMI_C-
HDMI_SCL
HDMI_0-
10K
R351
HPD_MST_2
TMDS3_RX0+
TMDS2_RX2-
HDMI_C+
TMDS1_RX0+
+5V_HDMI_3
4.7K
R362
CEC_C
DDC_SCL1
CEC
TMDS1_RX1-
HDMI1_5V_DET
TMDS2_RX1+
HDMI3_5V_DET
TMDS2_RXC-
TMDS2_RXC+
0.01uF
C310
1K
R344
SIDE_HDMI
10K
R300
0.01uF
C315
HDMI_0+
+3.3V_MULTI_MST
1K
R310
+3.3V
CEC
DDC_SDA2
0.01uF
C314
TMDS3_RX2+
TMDS1_RXC-
HDMI_1-
0.01uF
C316
10K
R328
HPD_S/W_1
TMDS2_RX0+
TMDS2_RX0+
0.01uF
C308
TMDS3_RX0-
HDMI_2-
HPD_S/W_3
TMDS3_RX0-
TMDS3_RX1+
HDMI2_5V_DET
10K
R324
0
R E
A D
Y
R369
TMDS3_RXC+
DDC_SCL3
TMDS1_RXC+
+3.3V_MULTI_MST
+5V_HDMI_2
HPD_S/W_2
HPD_MST_1
CEC
BSS83
Q306
S
B
D
G
10K
R335
SIDE_HDMI
TMDS1_RX1+
TMDS3_RX1-
TMDS2_RXC+
0
R370
R370
R E
A D
Y
TMDS1_RX2+
4.7K
R375
READY
0
R373
TMDS2_RX1+
TMDS1_RX0-
+3.3V_HDMI_SW
+5V_ST
4.7K
R361
0
R356
TMDS2_RX2-
+5V_HDMI_1
TMDS3_RX2-
TMDS3_RX2+
0
R358
HDMI_1+
0.01uF
50V
READY
C307
TMDS2_RX0-
TMDS2_RX0-
TMDS1_RX1-
4.7K
R374
KDS184S
KDS184
D300
A2
C
A1
10K
R329
TMDS2_RX1-
TMDS3_RX0+
0.01uF
C311
0.01uF
C312
TMDS1_RX2-
+5V_HDMI_3
TMDS3_RX1-
TMDS2_RX2+
HDMI_2+
HDMI_SEL2
TMDS1_RX2+
+5V_HDMI_1
10K
R352
TMDS3_RX1+
0.01uF
C309
0
R357
TMDS1_RXC-
0
R355
+5V_ST
TMDS3_RXC+
+5V_HDMI_3
+5V_ST
10K
R301
TMDS1_RX2-
+3.3V_HDMI_SW
+5V_HDMI_1
TMDS1_RX0-
TMDS2_RX1-
TMDS1_RX1+
HPD_S/W_1
0
R368
READY
10K
R325
0
R347
CEC
HDMI_SDA
DDC_SCL2
+5V_HDMI_2
HPD_S/W_3
TMDS1_RX0+
TMDS2_RX2+
0
R345
KDS184S
KDS184
D303
A2
C
A1
DDC_SDA1
0
R346
TMDS1_RXC+
CDS3C30GTH
30V
D302
READY
HPD_MST_3
DDC_SDA3
KDS184S
KDS184
D301
A2
C
A1
0
R350
47K
R330
47K
R331
47K
R326
47K
R327
47K
R354
47K
R353
0
READY
R365
0
READY
R376
M M
B D
3 0
1 L
T 1
G
30V
D304
A
C
DDC_SDA2 DDC_SCL2
DDC_SDA1 DDC_SCL1
DDC_SDA3 DDC_SCL3
TMDS351PAG
IC302
1
SDA3
2
SCL3
3
GND_1
4
B31
5
A31
6
VCC_1
7
B32
8
A32
9
GND_2
10
B33
11
A33
12
VCC_2
13
B34
14
A34
15
GND_3
16
VSADJ
17
Y4
18
Z4
19
VCC_3
20
Y3
21
Z3
22
GND_4
23
Y2
24
Z2
25
VCC_4
26
Y1
27
Z1
28
GND_5
29
SCL_SINK
30
SDA_SINK
31
HPD_SINK
32
S1
33
S2
34
EQ
35
HPD1
36
SDA1
37
SCL1
38
B11
39
A11
40
VCC_5
41
B12
42
A12
43
GND_6
44
B13
45
A13
46
VCC_6
47
B14
48
A14
49
VDD
50
HPD2
51
SDA2
52
SCL2
53
B21
54
A21
55
VCC_7
56
B22
57
A22
58
GND_7
59
B23
60
A23
61
VCC_8
62
B24
63
A24
64
HPD3
0
READY
R383
0.01uF
50V
C301
0.01uF
50V
C313
0.01uF
50V
C300
51K
R333
30K
R334
READY
4.7K
1%
R372
JP1115
JP1116
JP1117
JP1118
JP1119
JP1120
2SC3875S
RT1C3904-T112
Q300
E
B
C
2SC3875S
RT1C3904-T112
Q301
E
B
C
2SC3875S
Q307
SIDE_HDMI
E
B
C
DC1R019NBH
JK303
SIDE_HDMI
14
N
C
13
CEC
5
DATA1_SHIELD
20
JACK_GND
1
2
CLK-
11
CLK_SHIELD
2
DATA2_SHIELD
19
HPD
1
8
+5V_POWER
10
CLK+
4
DATA1+
1
DATA2+
17
DDC/CEC_GND
9
DATA0-
8
DATA0_SHIELD
3
DATA2-
16
SDA
7
DATA0+
6
DATA1-
1
5
SCL
47K
R371
+3.3V
200
R332
QJ41193-FEE2-7F
JK302
1
DATA2+
2
DATA2_SHIELD
3
DATA2-
4
DATA1+
5
DATA1_SHIELD
6
DATA1-
7
DATA0+
8
DATA0_SHIELD
9
DATA0-
1
0
CLK+
11
CLK_SHIELD
12
CLK-
13
CEC
14
NC
15
SCL
16
SDA
17
DDC/CEC_GND
18
+5V_POWER
19
HPD
20
JACK_GND
21
.
22
.
QJ41193-FEE2-7F
JK301
1
DATA2+
2
DATA2_SHIELD
3
DATA2-
4
DATA1+
5
DATA1_SHIELD
6
DATA1-
7
DATA0+
8
DATA0_SHIELD
9
DATA0-
10
CLK+
11
CLK_SHIELD
12
CLK-
13
CEC
14
NC
15
SCL
16
SDA
17
DDC/CEC_GND
18
+5V_POWER
19
HPD
20
JACK_GND
21
.
22
.
AT24C02BN-10SU-1.8
IC300
3
A2
2
A1
4
GND
1
A0
5
SDA
6
SCL
7
WP
8
VCC
AT24C02BN-10SU-1.8
IC301
3
A2
2
A1
4
GND
1
A0
5
SDA
6
SCL
7
WP
8
VCC
AT24C02BN-10SU-1.8
IC303
SIDE_HDMI
3
A2
2
A1
4
GND
1
A0
5
SDA
6
SCL
7
WP
8
VCC
+5V_MULTI
KDS184S
KDS184
D305
A2
C
A1
+5V_ST
0
R359
R E
A D
Y
4.7K
R360
READY
+3.3V_MULTI_MST
100
R323
100
R322
100
R320
100
R321
100
R348
100
R349
22
R378
22
R377
22
R382
22
R381
22
R379
22
R380
4.7K
READY
R366
*TI Recommand
-> Pull up
HDMI
3 11
MSTAR N-EU
OPTION
SW_HPD : USE SW HPD (Default)
MST_HPD : USE MST HPD
**MULTI ITEM
1.24C02-SUB:0IMMRAL014D
2.SMD HDMI Jack-SUB:6612B00015B
2008/01/08
HDMI
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.
EAM38769502
L402
EAM38769502
L406
BG1608B121F
EAM38769502
L403
KRC102S
Q403
NOT LG60
E
B
C
IR_OUT
100
R410
NOT LG60
LED_R_PWM_Big
SDA_LED
AC_DET
+3.3V_MST
SPK-N
LED_R/PWM
3.3K
R417
READY
4.7K
R420
47pF
C403
BG1608B121F
EAM38769502
L400
LED_G
10K
R434
NOT LG60
+5V_ST
0.1uF
C408
KEY2
KEY1
470pF
C404
4.7K
R421
0.1uF
C411
3.3K
R435
NOT LG60
0
READY
R425
OPT
C407
470pF
C412
10K
R409
READY
SCL_LED
+5V_ST
EYEQ_RESET
470pF
C401
NOT LG60
EAM38769502
L401
NOT LG60
22uF
16V
C414
USE LG50_60_70
12505WS-15A00
P400
1
2
3
4
5
6
7
8
9
10
11
12
13
14
16
15
TXCE0+,TXCE0-,TXCE1+,TXCE1-,TXCE2+,TXCE2-,TXCE3+,TXCE3-,TXCLKE+,TXCLKE-
4.7K
10B
IT
e
x
ce
pt
f
o
r 5
2
s
h
ar
p
R
40
1
0
R424
HD
TXCE0+,TXCE0-,TXCE1+,TXCE1-,TXCE2+,TXCE2-,TXCE3+,TXCE3-,TXCE4+,TXCE4-,TXCLKE+,TXCLKE-
+3.3V
4.7K
FHD
R407
0
READY
R432
0
R408
+3.3V
0
READY
R431
TXCLKO+,TXCLKO-,TXCO0+,TXCO0-,TXCO1+,TXCO1-,TXCO2+,TXCO2-,TXCO3+,TXCO3-,TXCO4+,TXCO4-
0
R402
8BIT or 52 sharp
2SA1530A-T112-1R
Q402
NOT LG60
E
B
C
SMAW200-40C
P402
FHD
19
14
9
4
18
13
8
3
17
12
7
2
16
11
6
1
20
15
10
5
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
SMW200-26C
P403
HD_NORMAL
19
14
9
4
18
13
8
3
17
12
7
2
16
11
6
1
20
15
10
5
21
22
23
24
25
26
3.3K
R413
0.1uF
C400
0
HD
R438
+5V_ST
OPT
READY
C402
10K
R440
IR-OUT
10K
R443
IR-OUT
+5V_ST
10K
R441
IR-OUT
47K
R439
IR-OUT
22
R442
IR-OUT
IR
10K
R414
LG60
10K
READY
R403
22uF
16V
C406
+3.3V_MST
5.
6B
ZD400
LG60
2SC3052
Q405
IR-OUT
E
B
C
2SC3052
Q404
IR-OUT
E
B
C
PNP
Q406
LG60
E
B
C
+5V_ST_SW
3.3K
R445
LG60
3.3K
R444
LG60
0
CPT
R428
0
READY
R415
0
NOT LG60
R404
0
R405
UBW2012-121F
120OHM
L404
UBW2012-121F
120OHM
L407
USE LG50_60_70
BG1608B501F
L410
BEAD_USE LG50_60_70
BG1608B501F
L411
BEAD_USE LG50_60_70
0
L411-*1
R_USE LG50_60_70
0
L410-*1
R_USE LG50_60_70
VCC_LCD
5.
6B
ZD401
USE LG50_60_70
5.
6B
ZD402
USE LG50_60_70
0
R423
USE LG50_60_70
0
R422
USE LG50_60_70
SMAW200-26C
P403-*1
HD_ATN
19
14
9
4
18
13
8
3
17
12
7
2
16
11
6
1
20
15
10
5
21
22
23
24
25
26
TXCE3+
TXCO2+
TXCE1-
TXCLKE-
TXCE2-
TXCE2+
TXCE1+
TXCO0+
TXCE0+
TXCE2+
TXCE1+
TXCO1+
TXCO3+
TXCLKE+
TXCE3+
TXCO4+
TXCO1-
TXCO0-
TXCO3-
TXCLKE+
TXCLKO+
TXCE3-
TXCO4-
TXCLKE-
TXCE0+
TXCO2-
TXCE1-
TXCE0-
TXCE0-
TXCE4-
TXCE3-
TXCE2-
TXCLKO-
TXCE4+
VCC_LCD
LVDS,CTR KEY
4 11
MSTAR
CONTROL KEY
NOT LG60
PANEL WAFER
*LG6 Sound module output
FHD
HD
2SC3052(P/N:0TRIY80001A) RA:2SC3875(P/N:0TR387500AA)
**MULTI ITEM
NC
NC
FHD 8BIT:NC
FHD 8BIT:NC
FHD 8BIT:NC
FHD 8BIT:NC
R428
CPT
LPL
R401
R402
10BIT
8BIT(HD)
8BIT(FHD)
4.7K
0
X
X
0
X
52 sharp
0
X
X
32 sharp
LG60
LG30
R404
R444
R445
Q
4
0
6
X
X
32 sharp
X
O
X
3.3K
3.3K
O
O
X
XX
X
R407
R424
HD
FHD
X
O
4.7K
X
X
L410
L411
O
LG50
X
X
X
O
LG70
X
X
X
BEAD
BEAD
BEAD
BEAD
BEAD
BEAD
BEAD
BEAD
X
L407
BEAD
22uF
X
C414
22uF
22uF
X
R414
X
10K
X
2008/01/08
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