LG 42LH30FD (CHASSIS:LT91A) 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.
+1.8V_TU_XE
FE_SIF
0 0 2 : T 1 6
+1.8V_TU_CE
0 . 1 u F
16V
C432
DTV_IF_P
+1.8V_TU_XE
+3.3V_TU_XE
+5V_TUNER
0 . 1 u F
16V
16V
C462
AZ1117H-3.3
IC403
2
OUTPUT
3
INPUT
1
ADJ/GND
L414
TUNER_SIF_IF_N
+1.8V_TU_CE
0 . 1 u F
16V
16V
C475
+1.8V_TUNER
0 . 1 u F
16V
16V
C463
+3.3V_TU_CE
+3.3V_TU_CE
10K
R463
10K
R446
OPT
+5V_TUNER
DTV_IF_N
004:AK27
+1.8V_TUNER
100K
R449
OPT
22pF
C465
OPT
33
R458
1/16W
0
5%
R404
+3.3V_TUNER
0
OPT
R406
0
R435
+5V_TUNER
10uF
6.3V
6.3V
C467
0 . 1 u F
16V
16V
C474
18pF
50V
50V
C449
0 . 1 u F
16V
C424
0 . 1 u F
16V
16V
C471
FE_TUNER_SDA
1/16W
0
5%
R442
0 . 1 u F
16V
16V
C455
+1.8V_TU_CE
+3.3V_TU_CE
33
R448
0 . 1 u F
16V
C437
+3.3V_TU_XE
0 . 1 u F
C421
TUNER_CVBS_IF_P
+1.8V_TU_XE
XC5000
IC402
1
VDDA_1
2
IN1
3
GND_1
4
IN2
5
GND_2
6
EXTCHOKE
7
GND_3
8
VDDA_2
9
VDDA_3
10
VDDC_1
11
GND_4
12
VDDC_2
13
VDDC_3
14
VDDA_4
15
VAGC
16
VIF
17
VDDA_5
18
SIF
19
GND_5
20
VDDC_4
21
VDDA_6
22
GND_6
23
VDDD_1
24
TESTMODE
25
DDI1
26
VDDC_5
27
DDI2
28
ADDRSEL
29
X2
30
GND_7
31
X1
32
EXTREF
33
VDDD_2
34
SCL
35
SDA
36
GND_8
37
RESET
38
VI2C
39
VDDC_6
40
VREF_N
41
VREF_P
42
VDDC_7
43
VDDC_8
44
REXT
45
VDDA_7
46
GND_9
47
VDDC_9
48
VDDA_8
22pF
C464
OPT
+1.8V_TUNER
+5V_TUNER
FE_VMAIN
0 0 2 : E 2 2
6.8nH
L405
+3.3V_TU_XE
L415
+3.3V_TUNER
0.1uF
16V
C440
0.1uF
16V
C418
L413
+1.8V_TU_CE
AZ1117H-1.8TRE1(EH13A)
IC405
2
OUTPUT
3
INPUT
1
ADJ/GND
0
R424
0 . 1 u F
16V
C427
+5V_TUNER
+1.8V_TU_XE
33
R462
0 . 1 u F
16V
16V
C482
0 . 1 u F
16V
C435
10K
R464
0 . 1 u F
16V
16V
C477
0 . 1 u F
16V
C450
0.1uF
16V
C460
22uF
16V
16V
C457
+1.8V_TU_CE
0 . 1 u F
16V
16V
C480
0 . 1 u F
16V
16V
C466
4.99K
1%
R412
FE_TUNER_SDA
0 . 1 u F
16V
C445
0 . 1 u F
C420
33
R461
+3.3V_TU_CE
0
R453
0 . 1 u F
16V
16V
C452
18pF
50V
50V
C448
TUNER_SIF_IF_N
004:B2
0 . 1 u F
16V
16V
C472
DTV_IF_N
56pF
OPT
C416
22pF
50V
50V
C459
0 . 1 u F
16V
C431
56pF
C413
CM2012F2R2KT
L409
680
R411
0
R443
0
R416
22uF
16V
16V
C458
FE_TS_DATA
0
R436
82
R410
0 . 1 u F
16V
16V
C439
1000pF
50V
C419
IF_AGC
+3.3V_TU_CE
0 . 1 u F
16V
16V
C479
0
R414
TUNER_CVBS_IF_P
10uF
6.3V
6.3V
C468
0 . 1 u F
16V
16V
C470
+5V_TUNER
FE_TUNER_SCL
/DEMOD_RESET
0 0 1 : M 1 8 ; 0 0 4 : L 1
1/16W
0
5%
R405
DTV_IF_P
0 . 1 u F
C417
0 . 1 u F
16V
16V
C443
0 . 1 u F
16V
16V
C456
1K
R468
FE_TUNER_SCL
SAM2333
LD401
A2[GN]
C
A1[RD]
FE_TS_SYNC
001:AM18
0 . 1 u F
16V
16V
C476
L412
GND
0 . 1 u F
C422
1K
R472
0 . 1 u F
16V
C433
0 . 1 u F
16V
C434
FE_TS_VAL
1000pF
50V
C425
0 . 1 u F
16V
16V
C473
0 . 1 u F
16V
16V
C454
+3.3V_TU_CE
680
R401
10K
R444
+1.8V_TU_XE
IF_AGC
22uF
16V
16V
C453
+3.3V_TUNER
0 . 1 u F
16V
16V
C469
0
R413
FE_TS_CLK
0 . 1 u F
16V
16V
C451
22pF
50V
50V
C461
1K
R466
0 . 1 u F
16V
C426
2K
R441
CE6355
EAN60223501
IC404
1
VSS_1
2
VDD_1
3
VSS_2
4
CLK1
5
DATA1
6
IRQ
7
CVDD_1
8
VSS_3
9
RESET
10
SLEEP
11
STATUS
12
SADD4
13
VDD_2
14
VSS_4
15
SADD3
16
SADD2
17
SADD1
18
SADD0
19
CVDD_2
20
VSS_5
21
PLLVDD
22
PLLGND
23
XTI
24
XTO
25
VSS_6
26
PLLTEST
27
OSCMODE
28
AVDD
29
AGND_1
30
VIN
31
VIN
32
AGND_2
33
VDD_3
34
RFLEV
35
CLK2/GPP0
36
DATA2/GPP1
37
CVDD_3
38
VSS_7
39
CVDD_4
40
VSS_8
41
AGC2/GPP2
42
AGC1
43
GPP3
44
SMTEST
45
VDD_4
46
VSS_9
47
MOSTRT
48
MOVAL
49
MDO0
50
MDO1
51
MDO2
52
MDO3
53
MDO4
54
VDD_5
55
VSS_10
56
MDO5
57
MDO6
58
MDO7
59
CVDD_5
60
VSS_11
61
MOCLK
62
BKERR
63
MICLK
64
CVDD_6
390
R415
390
R409
390
R408
390
R421
0 . 1 u F
16V
16V
C442
0 . 1 u F
16V
16V
C411
0 . 1 u F
16V
16V
C430
0 . 1 u F
16V
16V
C410
1008CS-821XGLC
820nH 2%
L408
0 . 1 u F
16V
C436
0 . 1 u F
16V
C428
0 . 1 u F
16V
C429
0 . 1 u F
16V
C438
0 . 1 u F
16V
C441
ISA1530AC1
Q402
E
B
C
ISA1530AC1
Q401
E
B
C
ISA1530AC1
Q403
E
B
C
ISA1530AC1
Q404
Q404
E
B
C
/FE_RESET
MLF1608A2R7J
L402
MLF1608A2R7J
L407
270nH
L404
120pF
50V
C414
39pF
50V
C415
390nH
L406
20.48MHz
X402
RCLAMP0502B
D960
RCLAMP0502B
D961
0 . 1 u F
50V
50V
C989
OPT
1uF
50V
50V
C990
OPT
0 . 1 u F
50V
50V
C991
OPT
RF_SWITCH_SEL
+3.3V_TU_RFSW
+3.3V
+3.3V_TU_RFSW
1/10W
4.7K
5%
R992
1/10W
4.7K
5%
R993
LNA_SWITCH_SEL
+3.3V_TU_LNA
1 . 2 p F
50V
50V
C985
OPT
1 . 2 p F
50V
50V
C987
OPT
31.875MHz
X401
OPT
0 . 1 u F
16V
16V
C998
220
R422
100pF
50V
50V
C444
31.875MHz
X403
4
GND_2
1
X-TAL_1
2
GND_1
3
X-TAL_2
+3.3V_TU_RFSW
L416
+3.3V_TUNER
+3.3V_TU_LNA
L417
+3.3V_TUNER
1/10W
10
1%
R988
1/10W
270
1%
R987
+3.3V_ST
0 . 1 u F
16V
16V
C491
OPT
0 . 1 u F
16V
16V
C492
PE42742G-20
IC907
1
GND_1
3
RF1
7
GND_6
9
GND_7
10
GND_8
11
GND_9
12
GND_10
13
RF2
14
GND_11
15
GND_12
16
C2
17
C1
18
VSS/GND_13
19
GND_14
20
VDD
5
GND_4
8
RFC
6
GND_5
4
GND_3
2
GND_2
3 . 3 p F
50V
50V
C988
12nH
L984
12nH
L983
3 . 3 p F
50V
50V
C986
0.01uF
50V
C1001
0.01uF
50V
C1004
TB7601TU
IC908
3
VM
2
GND
4
OUTPUT
1
INPUT
6
VCC
5
VOUT
100
R437
100
R438
L411
L410
6 . 8 p F
50V
50V
C423
6 . 8 p F
50V
50V
C409
100
R470
KCN-BT-2-0082
JK705
1
2
KCN-BT-2-0082
JK704
1
2
15pF
50V
C446
15pF
50V
C447
4 1 1
2%
2%
EAX60838501_MERCURY
Taiwan_LH20/LH30
X403 =>C446, C447
18pF => 15pF
EAX60838501
2 0 0 9 . 0 2 . 1 0
TUNER
LGE Use Only
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.
DSUB_B
0 0 2 : E 1 8
ISP_RXD
001:Y14
OPT
C510
470K
R501
220pF
50V
C518
0
R534
KCN-DS-1-0088
P503
1
2
3
4
5
6
7
8
9
10
PC_L_IN
0 0 2 : S 1 5
MAX3232CDR
IC502
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
100
R551
KCN-DS-1-0089
P501
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
DSUB_G
0 0 2 : E 1 8
0
R508
OPT
C509
DSUB_R
0 0 2 : E 1 7
100pF
50V
C501
220pF
50V
C519
4.7K
R549
OPT
C511
470K
R502
DBG_TX
0
R557
OPT
22
R540
1K
R546
0
R533
DBG_RX
ISP_TXD
+5V_ST
100pF
50V
C502
+5V_ST
0
R543
OPT
+3.3V
0
R507
P E J 0 2 4 - 0 1
JK501
6B
T_TERMINAL2
8
SHIELD_PLATE
7B
B_TERMINAL2
5
T_SPRING
4
R_SPRING
7A
B_TERMINAL1
6A
T_TERMINAL1
3
E_SPRING
22
R542
0 . 1 u F
50V
50V
C528
PC_R_IN
0 0 2 : S 1 5
4.7K
R548
DSUB_HSYNC
0 0 2 : E 1 7
DSUB_VSYNC
0 0 2 : E 1 7
DSUB_DET
100
R553
0 . 1 u F
16V
C515
EDID_WP
ENKMC2838-T112
D519
A1
C
A2
+5V_ST
4.7K
R545
0 . 0 4 7 u F
25V
C523
0 . 3 3 u F
16V
16V
C521
0 . 3 3 u F
16V
C517
0 . 3 3 u F
16V
16V
C522
CAT24C02WI-GT3
IC501
3
A2
2
A1
4
VSS
1
A0
5
SDA
6
SCL
7
WP
8
VCC
30V
D513
ADUC30S03010L_AMODIODE
30V
D514
ADUC30S03010L_AMODIODE
30V
D515
ADUC30S03010L_AMODIODE
30V
D516
ADUC30S03010L_AMODIODE
30V
D517
ADUC30S03010L_AMODIODE
30V
OPT
D529
ADUC30S03010L_AMODIODE
30V
OPT
D530
ADMC5M03200L_AMODIODE
5.6V
OPT
D518
ADMC5M03200L_AMODIODE
5.6V
OPT
D520
ADMC5M03200L_AMODIODE
5.6V
OPT
D522
ADMC5M03200L_AMODIODE
5.6V
OPT
D501
ADMC5M03200L_AMODIODE
5.6V
OPT
D502
+5V_USB_SIDE
CDS3C05HDMI1
5.6V
D524
10uF
10V
10V
C520
180
R550
0.1uF
C530
10uF
10V
10V
C529
SIDE_USB_DM
001:AN8
USB_OCD
0 0 1 : A I 1 4
+3.3V
CDS3C05HDMI1
5.6V
5.6V
D523
BLM18PG121SN1D
L502
SIDE_USB_DP
001:AN8
BLM18PG121SN1D
120-ohm
L501
47
R566
4.7K
R559
10K
R565
USB_CTL
0 0 1 : A J 2 6
AMOTECH
30V
D511
AMOTECH
30V
D509
10K
R521
AMOTECH
5.6V
D503
10K
R518
+3.3V
0
R531
COMP1_Y_IN
0 0 2 : E 1 5
COMP1_DET
0 0 1 : A J 2 0
COMP1_Pr_IN
0 0 2 : E 1 5
12K
R527
470K
R512
AV1_DET
COMP1_Pb_IN
0 0 2 : E 1 6
100pF
50V
C506
AV1_R_IN
AMOTECH
5.6V
D510
1000pF
50V
C504
+3.3V
12K
R530
0
R514
AMOTECH
30V
D506
AMOTECH
5.6V
D505
12K
R528
1K
R526
12K
R529
0 . 1 u F
16V
16V
C503
470K
R510
AMOTECH
5.6V
D508
0
R515
100pF
50V
C507
0
R532
COMP1_R_IN
0 0 2 : S 1 3
4.7K
R517
47pF
50V
50V
C508
10K
R520
4.7K
R516
75
R509
AMOTECH
30V
D507
AV1_L_IN
AV1_CVBS_IN
1K
R525
470K
R513
470K
R511
75
R524
75
R523
1000pF
50V
C505
10K
R519
AMOTECH
5.6V
D512
COMP1_L_IN
0 0 2 : S 1 3
AMOTECH
5.6V
D504
75
R522
12K
R564
FHD
AMOTECH
5.6V
D527
FHD
100pF
50V
C526
FHD
1K
R560
FHD
470K
R555
FHD
P P J 2 1 8 - 0 1
JK504
LH30
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
470K
R556
FHD
100pF
50V
C527
FHD
+3.3V
47pF
50V
50V
C525
FHD
4.7K
R558
FHD
10K
R561
FHD
AMOTECH
30V
D526
FHD
12K
R563
FHD
75
R554
FHD
AV2_CVBS_IN
0 . 1 u F
16V
16V
C524
FHD
AV2_R_IN
10K
R562
FHD
AMOTECH
5.6V
D525
FHD
AMOTECH
5.6V
D528
FHD
0
R552
FHD
2.2K
R539
2.2K
R538
18pF
50V
C514
18pF
50V
C513
10K
R541
100
R544
0 . 1 u F
16V
C512
USB DOWN STREAM
KJA-UB-4-0004
P502
1
2
3
4
5
0
R567
OPT
15K
R503
15K
R504
10K
R505
10K
R506
IR_OUT
0 0 1 : A J 2 6
P P J 2 2 8 - 0 1
JK502
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
MIC2019YM6
EAN60223701
IC503
3
ENABLE
2
GND
4
FAULT
1
VIN
6
VOUT
5
ILIMIT
NL17SZ00DFT2G
IC500
3
GND
2
B
4
Y
1
A
5
VCC
SPDIF_OUT
0 . 1 u F
16V
16V
C500
0 . 1 u F
16V
16V
C532
100pF
50V
50V
C516
0
OPT
R574
+5V_GENERAL
+3.3V
1K
OPT
R572
4.7K
R500
Fiber Optic
JST1223-001
JK503
1
GND
2
VCC
3
VINPUT
4
FIX_POLE
ADMC5M03200L_AMODIODE
OPT
D500
1/16W
22
5%
R571
+3.3V
0
OPT
R547
0
R573
75
1%
R537
75
1%
R535
75
1%
R536
PC AUDIO
RS232C
5 1 1
INTERFACE
[ P C ]
Side USB
DEVELOPE
AV2(SIDE)
Component and AV(CVBS)
F H D O p t i o n h a s b e e n a p p l i e d t o t h i s b l o c k
SIDE AV-IN_Only LH30
EAX60838501_MERCURY
Taiwan_LH20/LH30
EAX60838501
2 0 0 9 . 0 2 . 1 0
SPDIF OPTIC JACK
INTERFACE
LGE Use Only
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.
220uF
16V
C608
22
26"UP_HD
R629
1/10W
2K
R619
0
R616
OPT
LVDS_BC-
OPC_OUT
0
OPT
R630
PWM_DIM
OPC_OUT
0
R615
OPT
1000pF
50V
C609
PANEL_POWER
PWM_DIM
CB3216PA501E
22"UNDER
L607
LVDS_BC+
0
R611
FHD_V4
LVDS_B1-
LVDS_B2-
PANEL_POWER
LVDS_B0+
LVDS_B1+
0
R628
OPT
0
R627
26"UP_HD
LVDS_B3-
0
FHD_V4
R614
1/10W
2K
R622
0
26"UP_HD
R626
22
FHD_V4
R613
0
R612
OPT
LVDS_B3+
PANEL_POWER
LVDS_B2+
LVDS_B0-
0 . 1 u F
C610
CB3216PA501E
26"UP_HD
L606
LVDS_B1+
LVDS_B0-
LVDS_BC-
LVDS_BC+
LVDS_B0+
LVDS_B3+
LVDS_B2+
LVDS_B3-
LVDS_B2-
LVDS_B4+
LVDS_B4-
LVDS_B1-
LVDS_A3-
LVDS_A4+
LVDS_AC-
LVDS_A0+
LVDS_A2-
LVDS_A1-
LVDS_A1+
LVDS_AC+
LVDS_A3+
LVDS_A4-
LVDS_A0-
LVDS_A2+
+3.3V
0
OPT
R618
BIT_SEL
3.3K
OPT
R617
22
R625
+3.3V
0
OPT
R624
LVDS_SEL
2.2K
OPT
R623
0
OPT
R621
OPC_EN
+3.3V
LVDS_B0+
LVDS_B2-
LVDS_B1+
LVDS_B3-
LVDS_BC+
LVDS_B1-
LVDS_B0-
LVDS_B3+
LVDS_B2+
LVDS_BC-
TF05-51S
P602
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
FF10001-30
P954
22"UNDER
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
FF10001-30
P603
26"UP_HD
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
0
R632
2.2K
R631
OPT
+3.3V
PANEL_AGP
510
R620
OPC
6 1 1
****LVDS_SEL****
High:JEIDA
Low/NC:VESA
****************
EAX60838501_MERCURY
Taiwan_LH20/LH30
EAX60838501
2 0 0 9 . 0 2 . 1 0
LVDS
LGE Use Only
Click on the first or last page to see other 42LH30FD (CHASSIS:LT91A) service manuals if exist.