LG 37LH40 / 37LH41 (CHASSIS:LA92G) Service Manual ▷ View online
- 29 -
C
2009
M
S
T
7327
N
T
P
S65162
FFC C
a
bl
e
RI
GHT
FRC_L
VDS
OUT
PUT
+3.
3V
_FRC
+1.
2
6
V
_FRC
+1.
8V
_FRC
12
M
h
z
FRC_
SD
A
FRC_
SCL
SD
A
0
SCL0
FRC_
ODT
EE
PRO
M
FRC_RE
S
E
T
FRC_MCLK
FRC_MCLKZ
WP_E
EPRO
M
_
FRC
OPT_P
OPT_N
GOE
GSC
GSP
_R
GSP
SO
E
PO
L
H_C
ONV
LED
_LCM_FRC
VLCD
_LCM (
1
2
V
)
V
D
D
_
L
C
M
(
16
V)
VG
L (
-5
V
)
VG
H
VG
H
M
DPM
FLK
VC
OMROUT
P_
V
C
O
M
VCO
M_FB
VLCD
_LCM_
OUT
(
1
2
V)
VCC_
LCM (
3.
3
V
)
VCO
MLO
U
T
P_
V
C
O
M
P_Gam
ma
FFC C
a
bl
e
LEFT
VDD_
LCM_P
G
VG
H_
M
( +24
V)
VCO
MR_OP
VCOML_
O
P
DPM
SO
E_L
SO
E_
R
LTD_R
/L
LED
GM
A
1
~
1
8
Min
i LVDS
O
U
T
URSA
2
d:4
T-Con block (non GIP)
- 30 -
300
200
122
120
121
510
500
310
800
801
802
804
803
810
540
900
530
550
520
400
EXPLODED VIEW
A2
LV1
A10
LV2
Many electrical and mechanical parts in this chassis have special safety-related characteristics. These
parts are identified by in the Schematic Diagram and EXPLODED VIEW.
It is essential that these special safety parts should be replaced with the same components as
recommended in this manual to prevent X-RADIATION, Shock, Fire, or other Hazards.
Do not modify the original design without permission of manufacturer.
parts are identified by in the Schematic Diagram and EXPLODED VIEW.
It is essential that these special safety parts should be replaced with the same components as
recommended in this manual to prevent X-RADIATION, Shock, Fire, or other Hazards.
Do not modify the original design without permission of manufacturer.
IMPORTANT SAFETY NOTICE
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.
+3.3V
PEJ024-01
JK1205
6B
T_TERMINAL2
8
SHIELD_PLATE
7B
B_TERMINAL2
5
T_SPRING
4
R_SPRING
7A
B_TERMINAL1
6A
T_TERMINAL1
3
E_SPRING
470K
R1298
22
R1265
3.3K
R1274
470K
R1246
0.1uF
C1231
SIDEAV_CVBS_IN
001:D26
+5V_GENERAL
75
R1241
OPT
C1218
220
R1299
0.1uF
16V
C1228
5.6V
D1212
ADMC5M03200L
ZENER
100pF
50V
C1251
PC_R_IN 001:R31
100K
R1273
OPT
C1216
COMP2_R_IN
001:R33
1K
R1240
0.1uF
16V
C1234
BG2012B080TF
L1218
75
R1238
DBG_TX
47pF
50V
C1243
AV_CVBS_DET
001:AR23
COMP1_R_IN
001:R32
12K
R1256
R1256
18pF
50V
C1222
+5V_GENERAL
+3.3V_ST
470K
R1206
5.6V
D1231
ADMC5M03200L
ZENER
5.6V
D1230
ADMC5M03200L
ZENER
30V
D1207
ADUC30S03010L
ZENER
SIDEAV_R_IN
001:R33
100
R1281
12K
R1263
0
R1232
COMP2_PR
001:D31
BG2012B080TF
L1206
DSUB_DET
30V
D1209
ZENER
ADUC30S03010L
COMP1_L_IN
001:R32
PPJ227-01
JK1206
9
N
[GN]E-LUG
5
K
[GN]O-SPRING-L
6
K
[GN]CONTACT-L
4
E
[GN]O-SPRING-S
3
E
[GN]CONTACT-S
9
M
[BL]E-LUG
7
J
[BL]C-LUG-L
8
D
[BL]C-LUG-S
9L
[YL]E-LUG
4
L
[YL]O-SPRING-S
3
L
[YL]CONTACT-S
7
H
[RD]C-LUG-L
8
C
[RD]C-LUG-S
9
G
[WH]E-LUG
8
M
[WH]C-LUG-S_1
7
G
[WH]C-LUG-L
8
B
[WH]C-LUG-S_2
9
F
[RD]E-LUG
4
N
[RD]O-SPRING-S_1
3
N
[RD]CONTACT-S_1
5
F
[RD]O-SPRING-L
6
F
[RD]CONTACT-L
4
A
[RD]O-SPRING-S_2
3
A
[RD]CONTACT-S_2
100pF
50V
C1240
BG2012B080TF
L1208
30V
OPT
D1236
ADUC30S03010L
0
R1276
4.7K
R1279
R1279
5.6V
D1213
ADMC5M03200L
ZENER
220
R1302
COMP2_DET
001:AR23
ENKMC2838-T112
D1223
A1
C
A2
0
R1305
AV_CVBS_IN
001:D26
5.6V
D1214
ADMC5M03200L
ZENER
DSUB_R
001:D29
+3.3V
5.6V
OPT
D1224
ADMC5M03200L
10K
R1277
ISP_TXD
001:AB27;001:AR31
12K
R1293
1K
R1254
1000pF
50V
C1238
30V
D1216
ADUC30S03010L
ZENER
470K
R1245
OPT
D610
0.33uF
C1229
2SC3052
Q1200
E
B
C
30V
D1226
ADUC30S03010L
ZENER
30V
D1227
ADUC30S03010L
ZENER
10K
R1258
AV_R_IN
100
R1282
220pF
50V
C1239
+5V_ST
5.6V
D1220
ADMC5M03200L
ZENER
5.6V
ZENER
D1244
ADMC5M03200L
0 OPT
R1268
10K
R1237
100pF
C1219
1K
R1271
100
OPT
R1285
1000pF
50V
C1237
12K
R1304
100pF
50V
C1241
10K
R1252
470K
R1297
30V
D1218
ADUC30S03010L
ZENER
5.6V OPT
D1234
ADMC5M03200L
10K
R1300
10K
R1205
0.1uF
C1233
30V
D1245
ADUC30S03010L
ZENER
1000pF
50V
C1221
KCN-DS-1-0089
JK1201
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
5.6V OPT
D1235
ADMC5M03200L
5.6V
D1229
ADMC5M03200L
ZENER
47pF
50V
C1242
+3.3V
0
R1307
COMP2_Y
001:D31
COMP1_DET
001:AR23
PPJ218-01
JK1202
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
470K
R1289
5.6V
D1221
ADMC5M03200L
ZENER
5.6V
D1243
ADMC5M03200L
ZENER
12K
R1255
R1255
MAX3232CDR
IC1201
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
DSUB_B
001:D28
30V
D1228
ADUC30S03010L
ZENER
0.1uF
C1230
470K
R1244
5.6V
OPT
D1222
ADMC5M03200L
BG2012B080TF
L1217
75
R1286
4.7K
R1249
10K
R1301
SIDEAV_DET
001:AR23
470K
R1247
0.1uF
C1232
30V
D1215
ADUC30S03010L
ZENER
10K
R1204
12K
R1210
0.1uF
50V
C660
100
R1269
12K
R1264
22
R1257
VGA_EEPROM_WP
001:AR22
100pF
50V
C1224
470K
R1208
AT24C02BN-10SU-1.8
IC1200
3
A2
2
A1
4
GND
1
A0
5
SDA
6
SCL
7
WP
8
VCC
SPDIF_OUT
001:W29
30V
OPT
D1237
ADUC30S03010L
F i b e r O p t i c
JST1223-001
JK601
1
GND
2
VCC
3
VINPUT
4
FIX_POLE
5.6V
D1211
ADMC5M03200L
ZENER
0
R1216
DSUB_G
001:D29
18pF
50V
C1223
47pF
50V
C1252
470K
R1290
10K
R1211
1K
R638
10K
R1291
3.3K
OPT
R1218
+3.3V
100pF
50V
C1250
ISP_RXD
001:AB27
5.6V
ZENER
D1225
ADMC5M03200L
10K
OPT
R1217
75
R1243
10K
R1270
+5V_ST
DSUB_HSYNC
001:D29
4.7K
R1278
R1278
30V
D1219
ADUC30S03010L
ZENER
2SC3052
OPT
Q1201
E
B
C
0
R1233
PC_L_IN
001:R32
10K
R1262
220pF
50V
C1235
1K
R1212
5.6V
D1242
ADMC5M03200L
ZENER
0
R1275
10K
R1251
75
R1288
+3.3V
COMP1_PR
001:D28
100pF
50V
OPT
C1206
+5V_ST
4.7K
R1253
DSUB_VSYNC
001:D29
12K
R1303
10K
R1248
75
R1242
KCN-DS-1-0088
JK1203
1
2
3
4
5
6
7
8
9
10
OPT
C1217
10K
R1259
BLM18PG121SN1D
L1209
1K
R1283
IR
30V
D1210 ADUC30S03010L
ZENER
10K
R1292
12K
R1294
COMP1_PB
001:D27
100K
R1272
30V
D1208
ZENER
ADUC30S03010L
100pF
50V
C1225
COMP1_Y
001:D27
COMP2_PB
001:D31
75
R1287
75
1%
R1215
COMP2_L_IN
001:R33
100
OPT
R1284
BG2012B080TF
L1207
12K
R1207
DBG_RX
1000pF
50V
C1220
30V
D1217 ADUC30S03010L
ZENER
100pF
OPT
C1227
SIDEAV_L_IN
001:R33
AV_L_IN
75
R1235
75
R1236
75
R1234
AV
COMPONENT1/2,AV1
SIDE_AV
TxD
Serial Port
PC AUDIO
RS-232C
COMPONENT2
COMPONENT1
RxD
male
R,G,B PC&DDC
SPDIF OPTIC JACK
UNER
C
2009
SCHEMATIC DIAGRAM
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.
BLM18PG121SN1D
L501
D2-_HDMI1
0
R543
+1.8V_HDMI
QJ41193-CFEE1-7F
JK501
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
GND
+3.3V
0.1uF
16V
C524
0.1uF
C526
D1+_HDMI2
0
R599
5V_HDMI_3
0
R570
DDC_SCL_4
0
R574
47K
R546
0
R523
CEC_REMOTE
005:H8;005:H26;005:H17;005:R8;005:AM11
D2-_HDMI2
CK-_HDMI2
0.
1u
F
C517
0
R548
0
R512
DDC_SCL_1
0.1uF
16V
C509
HDMI_RX0+
0.1uF
C504
0
R575
+3.3V_ST
5V_HDMI_1
0
R550
3.6K
R500
OPT
0.1uF
16V
C502
OPT
CEC_REMOTE
TDA9996_SDA
CEC_REMOTE
005:H26;005:H17;005:L27;005:R8;005:AM11
D0-_HDMI4
D0-_HDMI1
005:Z12
5V_HDMI_3
0.
1u
F
C521
47K
OPT
R1507
0
R524
5V_HDMI_2
001:Y20;005:W27;005:AK15
2K
R542
0
R597
DDC_SCL_4
005:AH20;005:AM25
CK+_HDMI2
CK-_HDMI4
005:AH20
0
R513
0.1uF
C530
JP500
HPD2
0
R589
47K
R535
OPT
R554
GND
HDMI_RX2-
0
R539
DDC_SDA_1
DDC_SDA_2
005:Y26;005:AM12
DDC_SCL_3
005:AE6;005:AF25
D0+_HDMI2
005:AM13
0.1uF
16V
C518
5V_HDMI_4
D0+_HDMI1
0R
5
8
3
0
R544
QJ41193-CFEE1-7F
JK502
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
DDC_SCL_2
5V_HDMI_2
JP504
CK+_HDMI3
005:AE6
0.1uF
C528
D1+_HDMI4
0
R520
D0+_HDMI4
005:AG20
D0+_HDMI4
D2-_HDMI2
005:AM14
D1-_HDMI1
CK-_HDMI1
005:Z12
JP505
0
R596
47K
R537
AVRL161A1R1NT
VR502
OPT
0R
5
7
8
1K
R521
OPT
47K
OPT
R1500
DDC_SCL_3
0
OPT
R527
DDC_SDA_3
005:AE6;005:AF26
D2+_HDMI2
D0-_HDMI1
47K
OPT
R1505
D2-_HDMI4
R533
0.1uF
16V
C503
5V_HDMI_1
HDMI_RX1+
D1+_HDMI2
005:AM14
R558
AVRL161A1R1NT
VR504
OPT
CK+_HDMI1
DDC_SDA_1
H D
M I_
C L
K +
D0-_HDMI2
005:AM13
0.
1u
F
C514
47K
R559
CK+_HDMI3
TDA9996HL
IC502
1
VSS_1
2
OUT_C+
3
OUT_C-
4
VDDO[3V3]
5
OUT_DDC_CLK
6
OUT_DDC_DAT
7
VSS_2
8
VDDC[1V8]_1
9
RXA_HPD
10
RXA_5V
11
RXA_DDC_DAT
12
RXA_DDC_CLK
13
RXA_C-
14
RXA_C+
15
VDDH[3V3]_1
16
RXA_D0-
17
RXA_D0+
18
VSS_3
19
RXA_D1-
20
RXA_D1+
21
VDDH[3V3]_2
22
RXA_D2-
23
RXA_D2+
24
VDDH[1V8]_1
25
NC
26
VSS_4
27
TEST
28
R X
B _H
P D
29
RXB_5V
30
R X
B _D
D C
_ D
A T
31
R X
B _D
D C
_ C
L K
32
RXB_C-
33
RXB_C+
34
VDDH[3V3]_3
35
RXB_D0-
36
RXB_D0+
37
VSS_5
38
RXB_D1-
39
RXB_D1+
40
VDDH[3V3]_4
41
RXB_D2-
42
RXB_D2+
43
VSS_6
44
C D
E C
_ D
D C
45
VDDC[1V8]_2
46
VDDC[3V3]
47
M O
D E
48
P D
49
SDA/SEL1
50
SCL/SEL0
51
XTAL_IN
52
XTAL_OUT
53
INT/HP_CTRL
54
CDEC_STBY
55
VDDS[3V3]
56
VSS_7
57
CEC
58
RXC_HPD
59
RXC_5V
60
RXC_DDCC_DAT
61
RXC_DDC_CLK
62
RXC_C-
63
RXC_C+
64
VDDH[3V3]_5
65
RXC_D0-
66
RXC_D0+
67
VSS_8
68
RXC_D1-
69
RXC_D1+
70
VDDH[3V3]_6
71
RXC_D2-
72
RXC_D2+
73
VSS_9
74
R12K
75
VDDH[1V8]_2
76
R X
D _H
P D
77
R X
D _5
V
78
R X
D _D
D C
_ D
A T
79
R X
D _D
D C
_ C
L K
80
RXD_DC-
81
R X
D _D
C +
82
VDDH[3V3]_7
83
RXD_D0-
84
RXD_D0+
85
VSS_10
86
RXD_D1-
87
RXD_D1+
88
VDDH[3V3]_8
89
RXD_D2-
90
RXD_D2+
91
VDDC[1V8]_3
92
VSS_11
93
OUT_D2+
94
OUT_D2-
95
VDDO[1V8]
96
OUT_D1+
97
OUT_D1-
98
VSS_12
99
OUT_D0+
100
OUT_D0-
D1-_HDMI4
0
R581
D1-_HDMI3
005:AF6
DDC_SDA_2
0.
1u
F
C511
D1-_HDMI2
005:AM13
JP506
D0-_HDMI2
CK-_HDMI2
005:AM12
0
R503
0.1uF
16V
C501
OPT
0.1uF
16V
C529
D1+_HDMI3
005:AF6
CEC_REMOTE
005:H8;005:H17;005:L27;005:R8;005:AM11
0
R511
0.
1u
F
C515
0.1uF
C525
CEC_REMOTE
005:H8;005:H26;005:H17;005:L27;005:AM11
CK-_HDMI3
005:AE6
0
R585
M M
B D
3 01
L T
1 G
D500
5V_HDMI_4
001:AU28;005:AI18;005:AK27
CEC_REMOTE
005:H8;005:H26;005:L27;005:R8;005:AM11
AVRL161A1R1NT
VR506
OPT
0
R588
D1-_HDMI3
DDC_SDA_2
JP501
HPD1
HDMI_RX1-
DDC_SCL_2
005:Y25;005:AM12
5V_HDMI_3
DDC_SCL_4
DDC_SCL_3
GND
0
R526
0R
5
8
2
OPT
R553
0
R591
D2+_HDMI3
AVRL161A1R1NT
VR501
OPT
D0-_HDMI3
005:AF6
D1+_HDMI3
0
R508
0R
5
8
4
0.1uF
16V
C519
D1+_HDMI4
005:AF20
+1.8V_AMP
H D
M I_
S D
A
HDMI_RX0-
R549
CK+_HDMI4
005:AH20
D0+_HDMI3
DDC_SCL_1
005:R20;005:Y13
HDMI_SCL
R536
0
R577
0.1uF
16V
C512
D1+_HDMI1
005:Z11
HPD1
005:Z13
0.1uF
16V
C520
D1-_HDMI2
0.1uF
C507
+1.8V_HDMI
HPD4
0
R579
47K
OPT
R1503
D2+_HDMI2
005:AM14
DDC_SDA_4
AVRL161A1R1NT
VR505
OPT
0.
1u
F
C513
+3.3V_ST
KJA-ET-0-0032
JK503
14
NC
13
CEC
5
DATA1_SHIELD
20
JACK_GND
12
CLK-
11
CLK_SHIELD
2
DATA2_SHIELD
19
HPD
18
+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-
15
SCL
+5V_ST
0
R587
HDMI_CEC
001:C32
0
R551
CK-_HDMI3
1K
R1501
OPT
0.
1u
F
C516
+3.3V_HDMI
CK+_HDMI2
005:AM12
GND
+3.3V_HDMI
4.7K
R552
OPT
DDC_SDA_3
0.1uF
16V
C522
CK+_HDMI1
005:Z12
+3.3V_HDMI
D2+_HDMI1
005:Z10
AVRL161A1R1NT
VR500
OPT
DDC_SDA_3
D1-_HDMI1
005:Z11
+1.8V_HDMI
0
R592
1K
R1504
OPT
CK-_HDMI4
D0+_HDMI1
005:Z12
0
R509
D0-_HDMI4
005:AG20
0
R
573
0R
5
9
3
JP503
1K
R1506
OPT
0
R571
0.1uF
16V
C508
D2-_HDMI4
005:AF20
0
R569
+3.3V_ST
47K
R547
0.1uF
16V
C500
OPT
AVRL161A1R1NT
VR508
0.1uF
16V
C510
3.6K
R502
OPT
68K
R528
+3.3V_ST
CK-_HDMI1
D2-_HDMI3
0
R525
0
OPT
R555
HPD4
005:AI20
D1-_HDMI4
005:AG20
CB3216PA501E
L500
GND
3.6K
R518
OPT
0
R507
D2-_HDMI1
005:Z11
HDMI_RX2+
CK+_HDMI4
DDC_SDA_4
DDC_SCL_2
D2+_HDMI4
0
R580
AVRL161A1R1NT
VR507
OPT
0.1uF
16V
C505
OPT
0
OPT
R560
D0-_HDMI3
AVRL161A1R1NT
VR503
VR503
OPT
2K
R541
0
R557
0
R572
D2+_HDMI1
0
R586
0
R506
0.1uF
C527
5V_HDMI_1
001:AT28;005:Q22;005:AA14
1K
R515
OPT
HPD3
QJ41193-CFEE1-7F
JK500
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
DDC_SDA_4
005:AH20;005:AM25
12K
R556
5V_HDMI_4
D2-_HDMI3
005:AG6
R545
9.1K
R529
D2+_HDMI4
005:AF20
0
R504
0
R
595
0
R510
HPD3
005:AD6
47K
R534
D0+_HDMI3
005:AF6
D0+_HDMI2
0
R514
0
R505
1K
R522
OPT
0
R594
1KR516
OPT
0.1uF
16V
C506
SSM6N15FU
IC501
3
DRAIN2
2
GATE1
1
SOURCE1
4
SOURCE2
5
GATE2
6
DRAIN1
1K
R517
OPT
5V_HDMI_2
TDA9996_SCL
+3.3V_HDMI
0.1uF
16V
C523
HPD2
005:AM11
DDC_SDA_1
005:R19;005:Y13
DDC_SCL_1
0
R519
GND
+3.3V_ST
47K
R538
0
R598
JP502
3.6K
R501OPT
JP507
0
R576
47K
R561
D1+_HDMI1
0
R
590
HDMI_CLK-
D2+_HDMI3
005:AG6
HDMI S/W For MSTAR Platform
UI_HW_PORT3
For Only TDA9996 ES3
SIDE_HDMI_PORT4
Net Labels changed for HDMI3
UI_HW_PORT2
UI_HW_PORT1
in case HDMI Switch doesn
t support
ESD protection
Net Labels changed for HDMI2
* HDMI CEC
EDID Pull-up
VARISTORS(VR500/501/502/503/504/505/506/507) on lines-HPD1/2/3/4 are all options
HDMI
C
2009
Click on the first or last page to see other 37LH40 / 37LH41 (CHASSIS:LA92G) service manuals if exist.