Read LG 32LH20D (CHASSIS:LB91A) 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
DSUB_B
002:E18
ISP_RXD
001:Y14
C510
OPT
R501
470K
470K
C518
220pF
50V
R534
0
JK507
KCN-DS-1-0088
1
2
3
4
5
6
7
8
9
10
PC_L_IN
002:S15
IC502
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
R551
100
JK501
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_G
002:E18
R508
0
0
C509
OPT
DSUB_R
002:E17
C501
100pF
50V
C519
220pF
50V
R549
4.7K
C511
OPT
R502
470K
470K
DBG_TX
R557
0
OPT
R540
22
22
R546
1K
R533
0
DBG_RX
ISP_TXD
+5V_ST
C502
100pF
50V
+5V_ST
R543
0
OPT
+3.3V
R507
0
0
JK505
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
R542
22
C528
0.1uF
50V
0.1uF
50V
PC_R_IN
002:S15
R548
4.7K
DSUB_HSYNC
002:E17
DSUB_VSYNC
002:E17
DSUB_DET
R553
100
R537
75
R535
75
R536
75
C515
0.1uF
0.1uF
16V
EDID_WP
D519
ENKMC2838-T112
A1
C
A2
+5V_ST
R545
4.7K
C523
0.047uF
25V
C521
0.33uF
16V
0.33uF
16V
C517
0.33uF
16V
C522
0.33uF
16V
0.33uF
16V
IC501
CAT24C02WI-GT3
3
A2
2
A1
4
VSS
1
A0
5
SDA
6
SCL
7
WP
8
VCC
D513
30V
D514
30V
ADUC30S03010L_AMODIODE
D515
30V
ADUC30S03010L_AMODIODE
D516
30V
ADUC30S03010L_AMODIODE
D517
30V
ADUC30S03010L_AMODIODE
D529
30V
ADUC30S03010L_AMODIODE
OPT
D530
30V
ADUC30S03010L_AMODIODE
OPT
D518
5.6V
ADMC5M03200L_AMODIODE
OPT
D520
5.6V
ADMC5M03200L_AMODIODE
OPT
D522
5.6V
ADMC5M03200L_AMODIODE
OPT
D501
5.6V
ADMC5M03200L_AMODIODE
OPT
D502
5.6V
ADMC5M03200L_AMODIODE
OPT
D511
30V
AMOTECH
D509
30V
AMOTECH
R521
10K
10K
D503
5.6V
AMOTECH
R518
10K
+3.3V
R531
0
COMP1_Y_IN
002:E15
COMP1_DET
001:AJ20
COMP1_Pr_IN
002:E15
R527
12K
12K
R512
470K
470K
AV1_DET
COMP1_Pb_IN
002:E16
C506
100pF
50V
AV1_R_IN
D510
5.6V
AMOTECH
C504
1000pF
1000pF
50V
+3.3V
R530
12K
R514
0
0
D506
30V
AMOTECH
D505
5.6V
AMOTECH
R528
12K
12K
R526
1K
1K
R529
12K
C503
0.1uF
16V
0.1uF
16V
R510
470K
D508
5.6V
AMOTECH
R515
0
0
C507
100pF
50V
R532
0
COMP1_R_IN
002:S13
R517
4.7K
C508
47pF
50V
47pF
50V
R520
10K
10K
R516
4.7K
R509
75
D507
30V
AMOTECH
AV1_L_IN
AV1_CVBS_IN
R525
1K
R513
470K
470K
R511
470K
470K
R524
75
75
R523
75
C505
1000pF
1000pF
50V
R519
10K
D512
5.6V
AMOTECH
COMP1_L_IN
002:S13
D504
5.6V
AMOTECH
R522
75
R564
12K
D527
5.6V
AMOTECH
C526
100pF
50V
R560
1K
R555
470K
AV2_DET
AV2_L_IN
R556
470K
470K
C527
100pF
50V
+3.3V
C525
47pF
50V
47pF
50V
R558
4.7K
4.7K
R561
10K
10K
D526
30V
AMOTECH
R563
12K
R554
75
75
AV2_CVBS_IN
C524
0.1uF
16V
0.1uF
16V
AV2_R_IN
R562
10K
10K
D525
5.6V
AMOTECH
D528
5.6V
AMOTECH
R552
0
0
R539
2.2K
2.2K
R538
2.2K
2.2K
C514
18pF
50V
C513
18pF
18pF
50V
R541
10K
R544
100
C512
0.1uF
16V
R503
15K
15K
R504
15K
15K
R505
10K
R506
10K
IR_OUT
001:AJ26
JK502
PPJ228-01
9A
[GN]E-LUG
4A
[GN]O-SPRING-S
3A
[GN]CONTACT-S
9C
[RD]E-LUG_1
8C
[RD]C-LUG-S
9D
[WH]E-LUG
8D
[WH]C-LUG-S
9E
[RD]E-LUG_2
4E
[RD]O-SPRING-S
3E
[RD]CONTACT-S
5F
[YL]O-SPRING-L
6F
[YL]CONTACT-L
7G
[WH]C-LUG-L
5H
[RD]O-SPRING-L
6H
[RD]CONTACT-L
9B
[BL]E-LUG
8B
[BL]C-LUG-S
+3.3V
C530
0.1uF
R565
10K
IC503
MIC2019YM6
EAN60223701
3
ENABLE
2
GND
4
FAULT
1
VIN
6
VOUT
5
ILIMIT
R566
47
47
R569
0
REAR USB
L501
BLM18PG121SN1D
120-ohm
C520
10uF
10V
10uF
10V
C534
10uF
REAR USB
L502
BLM18PG121SN1D
SIDE_USB_DP
001:AN8
C529
10uF
D524
5.6V
CDS3C05HDMI1
C531
100uF
REAR USB
R567
0
OPT
SIDE_USB_DM
001:AN8
R559
4.7K
4.7K
USB_CTL
001:AJ26
R550
180
+5V_USB
R570
0
REAR USB
R568
0
REAR USB
D523
5.6V
CDS3C05HDMI1
USB_OCD
001:AI14
JK506
KJA-UB-4-0004
SIDE USB
1
+5V_USB
2
DM
3
DP
4
GND
5
GND
JK508
KJA-UB-0-0037
REAR USB
1
+5V_USB
2
DM
3
DP
4
GND
5
GND
JK504
PPJ218-02
FHD
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
JK503
JST1223-001
1
GND
2
VCC
3
VINPUT
4
FIX_POLE
SPDIF_OUT
IC500
NL17SZ00DFT2G
3
GND
2
B
4
Y
1
A
5
VCC
R500
4.7K
R547
0
OPT
R573
0
R574
0
OPT
C532
0.1uF
16V
0.1uF
16V
C500
0.1uF
16V
0.1uF
16V
C516
100pF
50V
100pF
50V
R572
1K
OPT
D500
OPT
ADMC5M03200L_AMODIODE
R571
22
22
1/16W
5%
5%
+3.3V
+3.3V
+5V_GENERAL
PC AUDIO
RS232C
EAX59793902(0)
5 11
INTERFACE
2009.01.31
[ PC ]
AV2(SIDE)
Component and AV(CVBS)
AUS_LH20/LH35
FHD Option has been applied to this block
SIDE AV-IN_Only LH35
For LH20_LH35 MP PCB_090131
EAX59793902(0)_AUS_MERCURY
DEVELOPE
Side USB
SPDIF OPTIC JACK
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