DOWNLOAD LG 26LU50FD-AC (CHASSIS:LB91A) Service Manual ↓ Size: 3.35 MB | Pages: 65 in PDF or view online for FREE

Model
26LU50FD-AC (CHASSIS:LB91A)
Pages
65
Size
3.35 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
26lu50fd-ac-chassis-lb91a.pdf
Date
PREV: LG 26LU30D (CHASSIS:LD01B) Service Manual

LG 26LU50FD-AC (CHASSIS:LB91A) 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.
TUNER
+1.8V_TU_XE
FE_SIF
002:T16
+1.8V_TU_CE
C432
0.1uF
16V
DTV_IF_P
+1.8V_TU_XE
+3.3V_TU_XE
+5V_TUNER
C462
0.1uF
16V
IC403
AZ1117H-3.3
2
OUTPUT
3
INPUT
1
ADJ/GND
L414
TUNER_SIF_IF_N
+1.8V_TU_CE
C475
0.1uF
16V
+1.8V_TUNER
L403
OPT
1uH
C463
0.1uF
16V
+3.3V_TU_CE
+3.3V_TU_CE
R463
10K
R446
10K
OPT
+5V_TUNER
DTV_IF_N
004:AK27
+1.8V_TUNER
R449
100K
OPT
C
4
6
5
2
2
p
F
OPT
R458
33
R404
0
1/16W
5%
+3.3V_TUNER
R406
0
OPT
R435
0
R422
0
+5V_TUNER
C467
10uF
6.3V
C474
0.1uF
16V
C449
18pF
50V
C424
0.1uF
16V
C471
0.1uF
16V
FE_TUNER_SDA
R442
0
1/16W
5%
C455
0.1uF
16V
+1.8V_TU_CE
+3.3V_TU_CE
R448
33
C437
0.1uF
16V
+3.3V_TU_XE
C421
0.1uF
TUNER_CVBS_IF_P
+1.8V_TU_XE
IC402
XC5000
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
C
4
6
4
2
2
p
F
OPT
+1.8V_TUNER
C444
270pF
OPT
+5V_TUNER
FE_VMAIN
002:E22
L405
6.8nH
+3.3V_TU_XE
L415
+3.3V_TUNER
C440
0.1uF
16V
C418
0.1uF
16V
L413
+1.8V_TU_CE
IC405
AZ1117H-1.8TRE1(EH13A)
2
OUTPUT
3
INPUT
1
ADJ/GND
R424
0
C427
0.1uF
16V
+5V_TUNER
+1.8V_TU_XE
R462
33
C482
0.1uF
16V
C435
0.1uF
16V
R464
10K
C477
0.1uF
16V
C460 0.1uF
16V
C457
22uF
16V
+1.8V_TU_CE
C480
0.1uF
16V
C466
0.1uF
16V
R412
4.99K
1%
FE_TUNER_SDA
C445
0.1uF
16V
C420
0.1uF
R461
33
+3.3V_TU_CE
R
4
5
3
0
C452
0.1uF
16V
C448
18pF
50V
TUNER_SIF_IF_N
004:B2
C472
0.1uF
16V
DTV_IF_N
C416
56pF
OPT
C459
22pF
50V
C431
0.1uF
16V
C413
56pF
L409
CM2012F2R2KT
R411
680
R443
0
R
4
1
6
0
C458
22uF
16V
FE_TS_DATA
R436
0
R410
82
C439
0.1uF
16V
C419
1000pF
50V
IF_AGC
+3.3V_TU_CE
C479
0.1uF
16V
R414
0
TUNER_CVBS_IF_P
C468
10uF
6.3V
C470
0.1uF
16V
+5V_TUNER
FE_TUNER_SCL
/DEMOD_RESET
001:M18;004:L1
R405
0
1/16W
5%
DTV_IF_P
C417
0.1uF
C443
0.1uF
16V
C456
0.1uF
16V
R468
1K
FE_TUNER_SCL
LD401
SAM2333
A
2
[
G
N
]
C
A
1
[
R
D
]
FE_TS_SYNC
001:AM18
C476
0.1uF
16V
L412
GND
C422
0.1uF
R472
1K
C433
0.1uF
16V
C434
0.1uF
16V
FE_TS_VAL
C425
1000pF
50V
C473
0.1uF
16V
C454
0.1uF
16V
+3.3V_TU_CE
R401
680
R444
10K
+1.8V_TU_XE
IF_AGC
C453
22uF
16V
+3.3V_TUNER
C469
0.1uF
16V
L411
R413
0
FE_TS_CLK
C451
0.1uF
16V
C461
22pF
50V
R466
1K
C426
0.1uF
16V
R441
2K
IC404
CE6355
EAN60223501
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
R
4
1
5
3
9
0
R409
390
R
4
0
8
3
9
0
R421
390
C442
0.1uF
16V
C411
0.1uF
16V
C430
0.1uF
16V
C410
0.1uF
16V
L408
1008CS-821XGLC
820nH 2%
C436
0.1uF
16V
C428
0.1uF
16V
C429
0.1uF
16V
C438
0.1uF
16V
C441
0.1uF
16V
C423
10pF
50V
C409
10pF
50V
Q402
ISA1530AC1
E
B
C
Q401
ISA1530AC1
E
B
C
Q403
ISA1530AC1
E
B
C
Q404
ISA1530AC1
E
B
C
/FE_RESET
R470
33
JK402
PAL-STRAIGHT
OPT
1
2
D401
EAH36618701
L402
MLF1608A2R7J
L407
MLF1608A2R7J
L404
270nH
C415
39pF
50V
L406
390nH
C446
18pF
50V
C
4
4
7
1
8
p
F
5
0
V
X402
20.48MHz
JK401
KCN-ET-0-0094
1
2
C414
120pF
50V
R437
100
R438
100
X403
31.875MHz
4
GND_2
1
X-TAL_1
2
GND_1
3
X-TAL_2
L410
0
1/10W
5%
C450
8pF
50V
EAX59793902(0)
4    11
   2009.01.31
2%
2%
AUS_LH20/LH35
Shield PAL Jack
EAX59793902(0)_AUS_MERCURY
U
S
B
 
D
O
W
N
 
S
T
R
E
A
M
F
i
b
e
r
 
O
p
t
i
c
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.
INTERFACE
DSUB_B
002:E18
ISP_RXD
001:Y14
C510
OPT
R501
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
C509
OPT
DSUB_R
002:E17
C501
100pF
50V
C519
220pF
50V
R549
4.7K
C511
OPT
R502
470K
DBG_TX
R557
0
OPT
R540
22
R546
1K
R533
0
DBG_RX
ISP_TXD
+5V_ST
C502
100pF
50V
+5V_ST
R543
0
OPT
+3.3V
R507
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
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
16V
EDID_WP
D519
ENKMC2838-T112
A1
C
A2
+5V_ST
R545
4.7K
C523
0.047uF
25V
C521
0.33uF
16V
C517
0.33uF
16V
C522
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
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
R512
470K
AV1_DET
COMP1_Pb_IN
002:E16
C506
100pF
50V
AV1_R_IN
D510
5.6V
AMOTECH
C504
1000pF
50V
+3.3V
R530
12K
R514
0
D506
30V
AMOTECH
D505
5.6V
AMOTECH
R528
12K
R526
1K
R529
12K
C503
0.1uF
16V
R510
470K
D508
5.6V
AMOTECH
R515
0
C507
100pF
50V
R532
0
COMP1_R_IN
002:S13
R517
4.7K
C508
47pF
50V
R520
10K
R516
4.7K
R509
75
D507
30V
AMOTECH
AV1_L_IN
AV1_CVBS_IN
R525
1K
R513
470K
R511
470K
R524
75
R523
75
C505
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
C527
100pF
50V
+3.3V
C525
47pF
50V
R558
4.7K
R561
10K
D526
30V
AMOTECH
R563
12K
R554
75
AV2_CVBS_IN
C524
0.1uF
16V
AV2_R_IN
R562
10K
D525
5.6V
AMOTECH
D528
5.6V
AMOTECH
R552
0
R539
2.2K
R538
2.2K
C514
18pF
50V
C513
18pF
50V
R541
10K
R544
100
C512
0.1uF
16V
R503
15K
R504
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
R569
0
REAR USB
L501
BLM18PG121SN1D
120-ohm
C520
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
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
C500
0.1uF
16V
C516
100pF
50V
R572
1K
OPT
D500
OPT
ADMC5M03200L_AMODIODE
R571
22
1/16W
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
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.
LVDS
C608
220uF
16V
R629
22
26"UP_HD
R619
2K
1/10W
R616
0
OPT
LVDS_BC-
OPC_OUT
R630
0
OPT
PWM_DIM
OPC_OUT
R615
0
OPT
C609
1000pF
50V
PANEL_POWER
PWM_DIM
L607
CB3216PA501E
22"UNDER
LVDS_BC+
R611
0
FHD
LVDS_B1-
LVDS_B2-
PANEL_POWER
LVDS_B0+
LVDS_B1+
R628
0
OPT
R627
0
26"UP_HD
LVDS_B3-
R614
0
FHD
R622
2K
1/10W
R626
0
26"UP_HD
R613
22
FHD
R612
0
LVDS_B3+
PANEL_POWER
LVDS_B2+
LVDS_B0-
C610
0.1uF
L606
CB3216PA501E
26"UP_HD
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
R618
0
OPT
BIT_SEL
R617
3.3K
FHD
R625
22
+3.3V
R624
0
OPT
LVDS_SEL
R623
2.2K
OPT
R621
0
OPT
OPC_EN
+3.3V
LVDS_B0+
LVDS_B2-
LVDS_B1+
LVDS_B3-
LVDS_BC+
LVDS_B1-
LVDS_B0-
LVDS_B3+
LVDS_B2+
LVDS_BC-
P602
TF05-51S
FHD
1
VLCD
2
VLCD
3
VLCD
4
VLCD
5
NC
6
GND
7
GND
8
PANEL_AGP
9
GND
10
GND
11
.
12
.
13
.
14
.
15
GND
16
R2CLKP
17
R2CLKN
18
GND
19
.
20
.
21
.
22
.
23
.
24
.
25
BIT_SEL
26
GND
27
.
28
.
29
.
30
.
31
GND
32
R1CLKP
33
R1CLKN
34
GND
35
.
36
.
37
.
38
.
39
.
40
.
41
GND
42
OPC_EN
43
OPC_OUT
44
P_DIM
45
LVDS_SEL
46
NC
47
NC
48
NC
49
NC
50
NC
51
GND
52
.
P954
FF10001-30
22"UNDER_HD
1
VLCD_5V
2
VLCD_5V
3
VLCD_5V
4
VLCD_5V
5
VLCD_5V
6
GND
7
GND
8
GND
9
NC
10
NC
11
NC
12
GND
13
.
14
.
15
GND
16
CLKP
17
CLKN
18
GND
19
.
20
.
21
GND
22
.
23
.
24
GND
25
.
26
.
27
GND
28
NC
29
PWM_OUT
30
NC
31
.
P603
FF10001-30
26"UP_HD
1
GND
2
GND
3
PWM_DIM
4
OPC_OUT
5
GND
6
.
7
.
8
GND
9
CLKP
10
CLKN
11
GND
12
.
13
.
14
GND
15
.
16
.
17
GND
18
.
19
.
20
GND
21
OPC_EN
22
LVDS_SEL
23
GND
24
GND
25
GND
26
GND
27
VLCD
28
VLCD
29
VLCD
30
VLCD
31
.
R632
0
R631
2.2K
OPT
+3.3V
PANEL_AGP
R620
510
OPC
EAX59793902(0)
6    11
   2009.01.31
AUS_LH20/LH35
****LVDS_SEL****
High:JEIDA
Low/NC:VESA
****************
For LH20_LH35 MP
EAX59793902(0)_AUS_MERCURY
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