Read LG 55LH50YD (CHASSIS:LB91B) Service Manual online
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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.
INTERFACE
C419
220pF
50V
JK407
KCN-DS-1-0088
1
2
3
4
5
6
7
8
9
10
IC401
MAX3232CDR
3
C
1
-
2
V
+
4
C
2
+
1
C
1
+
6
V
-
5
C
2
-
7
D
O
U
T
2
8
R
I
N
2
9
R
O
U
T
2
1
0
D
I
N
2
1
1
D
I
N
1
1
2
R
O
U
T
1
1
3
R
I
N
1
1
4
D
O
U
T
1
1
5
G
N
D
1
6
V
C
C
R464
100
C420
220pF
50V
R462
4.7K
DBG_TX
R470
0
IR_OUT
DBG_RX
+5V_ST
+5V_ST
JK401
PEJ024-01
6B
T_TERMINAL2
8
SHIELD_PLATE
7B
B_TERMINAL2
5
T_SPRING
4
R_SPRING
7A
B_TERMINAL1
6A
T_TERMINAL1
3
E_SPRING
C429
0.1uF
16V
0.1uF
16V
R461
4.7K
R466
100
C413
0.1uF
16V
0.1uF
16V
+5V_GENERAL
+5V_GENERAL
JK403
JST1223-001
1
GND
2
VCC
3
VINPUT
4
FIX_POLE
SPDIF_OUT
002:X18
R451
1K
D434
30V
ADUC30S03010L_AMODIODE
OPT
D435
30V
ADUC30S03010L_AMODIODE
OPT
D423
OPT
ADMC5M03200L_AMODIODE
+5V_USB_SIDE
D429
5.6V
CDS3C05HDMI1
C421
10uF
10V
10uF
10V
R463
180
C431
0.1uF
C430
10uF
10V
10uF
10V
SIDE_USB_DM
001:AM8
USB_OCD
001:AI14
+3.3V
D428
5.6V
CDS3C05HDMI1
L401
BLM18PG121SN1D
SIDE_USB_DP
001:AM8
L400
BLM18PG121SN1D
120-ohm
OPT
R479
47
47
R472
4.7K
4.7K
R478
10K
USB_CTL
001:AJ26
D432
5.6V
AMOTECH
C427
100pF
50V
R473
1K
JK404
PPJ218-01
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
AV2_DET
AV2_L_IN
C428
100pF
50V
+3.3V
C426
47pF
50V
47pF
50V
R471
4.7K
4.7K
D431
30V
AMOTECH
R467
75
75
AV2_CVBS_IN
C425
0.1uF
16V
0.1uF
16V
AV2_R_IN
D430
5.6V
AMOTECH
D433
5.6V
AMOTECH
R465
0
0
C402
0.1uF
16V
0.1uF
16V
R433
75
75
D411
30V
AMOTECH
COMP1_Pr
004:U13
+3.3V
D413
5.6V
AMOTECH
R408
4.7K
4.7K
R419
1K
COMP1_L_IN
002:R14
COMP2_DET
001:AA22
R430
75
C403
100pF
50V
AV1_R_IN
R439
12K
R426
10K
10K
R409
4.7K
D415
5.6V
AMOTECH
D405
5.6V
AMOTECH
COMP2_Pb
004:U11
COMP2_L_IN
002:R16
R440
12K
12K
D408
30V
AMOTECH
C408
1000pF
50V
1000pF
50V
R417
1K
1K
+3.3V
COMP1_R_IN
002:R14
R414
470K
470K
R428
10K
10K
R431
75
D407
30V
AMOTECH
D402
30V
AMOTECH
R445
0
0
R421
0
0
AV1_DET
C407
1000pF
50V
1000pF
50V
D416
5.6V
AMOTECH
R436
12K
C405
1000pF
50V
1000pF
50V
R441
12K
12K
R444
0
0
R416
470K
R410
4.7K
D412
5.6V
AMOTECH
COMP1_DET
001:AJ20
COMP1_Y
004:U11
D410
30V
AMOTECH
R432
75
D417
5.6V
AMOTECH
AV1_L_IN
R435
75
R434
75
R420
0
0
R427
10K
10K
R424
10K
10K
COMP2_Y
004:U10
R413
470K
470K
R411
470K
470K
C406
100pF
50V
R437
12K
12K
R415
470K
R443
0
0
R429
75
R412
470K
470K
R423
10K
10K
COMP1_Pb
004:U12
R438
12K
12K
+3.3V
C404
1000pF
50V
1000pF
50V
R442
0
0
COMP2_R_IN
002:R16
D404
30V
AMOTECH
COMP2_Pr
004:U12
AV1_CVBS_IN
R422
0
0
D403
5.6V
AMOTECH
D414
5.6V
AMOTECH
R418
1K
1K
R425
10K
10K
D406
30V
AMOTECH
C409
47pF
50V
47pF
50V
D409
5.6V
AMOTECH
D426
5.6V
ADMC5M03200L_AMODIODE
OPT
JK405
KCN-DS-1-0089
1
2
3
4
5
6
7
8
9
1
0
1
1
1
2
1
3
1
4
1
5
1
6
DSUB_B
002:D19
DSUB_HSYNC
002:D18
D418
30V
EDID_WP
001:AJ20;006:AK7;006:AN3;006:AN12;006:AN17
C412
18pF
18pF
OPT
+5V_ST
R446
0
R449
75
R460
1K
C417
0.1uF
0.1uF
16V
R459
4.7K
JP423
R447
0
ISP_RXD
DSUB_R
002:D19
R452
2.2K
2.2K
IC400
CAT24C02WI-GT3
3
A2
2
A1
4
VSS
1
A0
5
SDA
6
SCL
7
WP
8
VCC
R453
2.2K
2.2K
JP425
C416
18pF
50V
R450
75
R454
22
22
D425
ENKMC2838-T112
A1
C
A2
R458
100
D427
5.6V
ADMC5M03200L_AMODIODE
OPT
D422
30V
ADUC30S03010L_AMODIODE
D421
30V
ADUC30S03010L_AMODIODE
R448
75
DSUB_G
002:D19
R457
0
OPT
D424
5.6V
ADMC5M03200L_AMODIODE
OPT
JP424
C411
18pF
18pF
OPT
DSUB_DET
D419
30V
ADUC30S03010L_AMODIODE
ISP_TXD
D420
30V
ADUC30S03010L_AMODIODE
DSUB_VSYNC
002:D18
C414
0.1uF
16V
R456
22
C410
18pF
18pF
OPT
+3.3V
C415
18pF
18pF
50V
R455
10K
R482
12K
12K
R484
0
0
R483
12K
12K
R485
0
0
R480
10K
10K
R481
10K
10K
R468
470K
R469
470K
JK402
PPJ227-01
9N
[GN]E-LUG
.
5K
[GN]O-SPRING-L
COMP2_Y
6K
[GN]CONTACT-L
.
4E
[GN]O-SPRING-S
COMP1_Y
3E
[GN]CONTACT-S
.
9M
[BL]E-LUG
.
7J
[BL]C-LUG-L
COMP2_Pb
8D
[BL]C-LUG-S
COMP1_Pb
9L
[YL]E-LUG
.
4L
[YL]O-SPRING-S
AV1_CVBS
3L
[YL]CONTACT-S
.
7H
[RD]C-LUG-L
COMP2_Pr
8C
[RD]C-LUG-S
COMP1_Pr
9G
[WH]E-LUG
.
8M
[WH]C-LUG-S_1
AV1_L
7G
[WH]C-LUG-L
COMP2_L
8B
[WH]C-LUG-S_2
COMP1_L
9F
[RD]E-LUG
.
4N
[RD]O-SPRING-S_1
AV1_R
3N
[RD]CONTACT-S_1
.
5F
[RD]O-SPRING-L
COMP2_R
6F
[RD]CONTACT-L
.
4A
[RD]O-SPRING-S_2
COMP1_R
3A
[RD]CONTACT-S_2
.
D401
5.6V
ADMC5M03200L_AMODIODE
OPT
C400 100pF
PC_R_IN
002:R16
D400
5.6V
ADMC5M03200L_AMODIODE
OPT
C401
100pF
50V
PC_L_IN
002:R16
R400
470K
R401
470K
JK406
KJA-UB-4-0004
1
2
3
4
5
R486
15K
15K
R489
15K
15K
R490
10K
R487
10K
C432
470uF
16V
16V
IR_OUT
IC402
MIC2019YM6
3
ENABLE
2
GND
4
FAULT
1
VIN
6
VOUT
5
ILIMIT
C424
0.047uF
50V
R474
0
0
C433
100pF
50V
OPT
OPT
C423
0.33uF
50V
0.33uF
50V
C422
0.33uF
50V
0.33uF
50V
C418
0.33uF
50V
COMP1_Y_IN
002:D16
COMP2_Y_IN
002:D20
COMP2_Pb_IN
002:D20
COMP1_Pb_IN
002:D16
COMP1_Pr_IN
002:D16
COMP2_Pr_IN
002:D20
COMP2_Y
R402
0
0
R403
0
0
COMP1_Y
R404
0
0
COMP2_Pb
R405
0
0
COMP1_Pb
R406
0
0
COMP2_Pr
R407
0
0
COMP1_Pr
PC AUDIO
RS232C
EAX60148002-0(LH50)
4 11
INTERFACE
2009.01.19
SPDIF OPTIC JACK
$0.15
Side USB
Pin to Pin with
AV2(SIDE)
EAN43439401
Level Down: 470K -> 180K
Level Down: 470K -> 180K
Component1/2 and AV1(rear)
[ PC ]
(MIC2009)
$0.67965
$0.17
$0.175
$0.054
$0.18624
$0.152
$0.13643
$0.179
$0.1728
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