LG 26LU50FR-LA / 26LU50FR-TA (CHASSIS:LP91A) Service Manual ▷ View online
TMDS3_RX2-
+5V_HDMI_2
TMDS3_RXC-
HPD_MST_2
TMDS3_RX0+
TMDS2_RX2-
CEC TMDS2_RXC-
TMDS2_RXC+
TMDS1_RXC-
TMDS2_RX0+
TMDS3_RX0-
TMDS3_RX1+
TMDS3_RXC+
+5V_HDMI_2
HPD_MST_1
CEC
TMDS1_RX2+
TMDS2_RX1+
+5V_MULTI
+5V_HDMI_1
TMDS3_RX2+
TMDS2_RX0-
TMDS1_RX1-
TMDS2_RX1-
TMDS1_RX2-
+5V_HDMI_3
TMDS3_RX1-
+5V_MULTI
+5V_HDMI_3
+5V_MULTI
+5V_HDMI_1
TMDS1_RX0-
TMDS1_RX1+
CEC
TMDS1_RX0+
TMDS2_RX2+
TMDS1_RXC+
HPD_MST_3
DDC_SDA2 DDC_SCL2
DDC_SDA1 DDC_SCL1
DDC_SDA3 DDC_SCL3
JP304
JP305
JP301
JP300
JP302
JP303
2SC3875S
RT1C3904-T112
Q301
E
B
C
2SC3875S
RT1C3904-T112
Q300
E
B
C
2SC3875S
RT1C3904-T112
Q302
E
B
C
KJA-ET-0-0032
JK303
14
NC
1
3
CEC
5
DATA1_SHIELD
20
JACK_GND
1
2
CLK-
11
CLK_SHIELD
2
DATA2_SHIELD
19
H
P
D
1
8
+5V_POWER
1
0
CLK+
4
DATA1+
1
DATA2+
17
DDC/CEC_GND
9
DATA0-
8
DATA0_SHIELD
3
DATA2-
16
S
D
A
7
DATA0+
6
DATA1-
1
5
SCL
KDS184S
D300
A1
C
A2
KDS184S
D301
A1
C
A2
KDS184S
D302
A1
C
A2
CAT24C02WI-GT3
IC301
3
A2
2
A1
4
VSS
1
A0
5
SDA
6
SCL
7
WP
8
VCC
CAT24C02WI-GT3
IC302
3
A2
2
A1
4
VSS
1
A0
5
SDA
6
SCL
7
WP
8
VCC
CAT24C02WI-GT3
IC300
3
A2
2
A1
4
VSS
1
A0
5
SDA
6
SCL
7
WP
8
VCC
DDC_WP
DDC_WP
DDC_WP
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.
BSS83 CEC_READY
Q303
S
B
D
G
CEC
+3.3V_MST
CEC_C
CDS3C30GTH 30
V
CEC_READY
D304
MMBD301LT1G 30V CEC_READY
D303
10K
R301
1K
R303
0.01uF
C300
10K
R300
1K
R302
100
R329
1K
R314
10K
R312
68K CEC_READY
R315
0
R313
100
R317
100
R318
100
R305
100
R304
0.01uF
C301
100
R331
100
R306
100
R307
0.01uF
C302
100
R327
10K
R308
10K
R310
10K
R309
10K
R311
10K
R319
10K
R320
QJ41193-CFEE1-7F
JK301
1
DATA2+
2
DATA2_SHIELD
3
DATA2-
4
DATA1+
5
DATA1_SHIELD
6
DATA1-
7
DATA0+
8
DATA0_SHIELD
9
DATA0-
10
CLK+
11
12
13
14
15
16
17
18
19
20
JACK_GND
21
.
22
QJ41193-CFEE1-7F
JK302
1
DATA2+
2
DATA2_SHIELD
3
DATA2-
4
DATA1+
5
DATA1_SHIELD
6
DATA1-
7
DATA0+
8
DATA0_SHIELD
9
DATA0-
10
CLK+
11
12
13
14
15
16
17
18
19
20
JACK_GND
21
.
22
56K CEC_READY
R316
HDMI
3 9
MSTAR N-EU
2008/12/16
OPTION
SW_HPD : USE SW HPD (Default)
MST_HPD : USE MST HPD
H6 LCD MERCURY
EAX56856904
TXCE0+,TXCE0-,TXCE1+,TXCE1-,TXCE2+,TXCE2-,TXCE3+,TXCE3-,TXCE4+,TXCE4-,TXCLKE+,TXCLKE-,TXCLKO+,TXCLKO-,TXCO0+,TXCO0-,TXCO1+,TXCO
1-,TXCO2+,TXCO2-,TXCO3+,TXCO3-,TXCO4+,TXCO4-
47pF
C403
22
IR-OUT
R430
470pF
C404
NON_19_22_26"
KEY1
ZD401
120ohm
L406
NON_19_22_26"
ZD402
+5VST_MST
ZD400
500-ohm
L410
NON_19_22_26"
IR_OUT
+3.3V_MULTI_MST
10K IR-OUT
R429
2SC3052
Q405
IR-OUT
E
B
C
500-ohm
L411
NON_19_22_26"
SUB_SCL
120ohm
L402
KEY2
2SC3052
Q404
IR-OUT
E
B
C
+5VST_MST
IR
SUB_SDA
0.1uF
C408
NON_19_22_26"
+3.3V_MST
+5VST_MST
0.1uF
C411
NON_19_22_26"
470pF
C412
NON_19_22_26"
120ohm
L403
NON_19_22_26"
+3.3V_MULTI_MST
+3.3V_MULTI_MST
+5V_+12V_LCD
0.1uF
C407
READY
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.
47uF 16V
C406
0.1uF 16V
C414
NON_19_22_26"
+3.3V_MST
KEY2
100pF
50V
C401
19_22_26"
KEY1
100pF
50V
C400
19_22_26"
+5V_+12V_LCD
TXCE0+,TXCE0-,TXCE1+,TXCE1-,TXCE2+,TXCE2-,TXCE3+,TXCE3-,TXCE4+,TXCE4-,TXCLKE+,TXCLKE-,TXCLKO+,TXCLKO-,TXCO0+,TXCO0-,TXCO1+,TXCO
1-,TXCO2+,TXCO2-,TXCO3+,TXCO3-,TXCO4+,TXCO4-
+5V_+12V_LCD
+3.3V_MULTI_MST
OPC_EN
E-DIM
OPC_OUT
100pF
50V
C405
19_22_26"
SUB_SCL
100pF
50V
C402
19_22_26"
12507WS-12L
P400
NON_19_22_26"
1
SCL
2
SDA
3
GND
4
KEY1
5
KEY2
6
5V_ST
7
GND
8
WARM_ST(LED_R_BIG)
9
IR
10
GND
11
ST_3.3V(LED_B)
12
POWER_ON(LED_R_SMALL)
13
.
P405
19_22_26"
1
KEY1
2
KEY2
3
GND
4
5V_ST
5
GND
6
IR
7
LED_B
8
LED_R
9
.
BG1608B121F
L400
19_22_26"
BG1608B121F
L401
19_22_26"
BG1608B121F
L408
19_22_26"
BG1608B121F
L405
19_22_26"
4.7K
R420
4.7K
R421
10K IR-OUT
R427
10K
IR-OUT
R428
47K
IR-OUT
R426
0
R417
NON_19_22_26"
0
R400
READY
0
R403
NON_19_22_26"
0
R413
READY
0
R402
8BIT or 52 sharp
4.7K 10BIT
R401
4.7K JEIDA
R407
0
R424
VESA
100
R409
READY
0
READY
R405
0
OPC_ENABLE
R412
470
R435
OPC_ENABLE
SMAW200-03
P404
19_22_26"
1
KEY1
2
KEY2
3
GND
120-ohm
L404
120-ohm
L407
NON_19_22_26"
TF05-51S
P401
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
P402
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
SMW200-28C
P403
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
LED_R
+3.3V_MST
RT1C3904-T112
Q400
OPC_ENABLE
E
B
C
1K
R411
OPC_ENABLE
10K
R404
19_22_26"
2SC3052
Q401
19_22_26"
E
B
C
+3.3V_MULTI_MST
10K
R410
19_22_26"
10K
R414
19_22_26"
2SC3052
Q402
19_22_26"
E
B
C
+3.3V_MST
10K
R415
19_22_26"
4.7K
R406
19_22_26"
0
READY
R416
0
READY
R418
0
NON 22/27" FHD
R419
0
NON 22/27" FHD
R422
0
NON 22/27" FHD
R423
0
NON 22/27" FHD
R431
0
NON 22/27" FHD
R425
TXCO3+
TXCE1+
TXCO1+
TXCE1-
TXCLKO+
TXCO2-
TXCO2+
TXCO1-
TXCE2+
TXCE2-
TXCLKE+
TXCLKE-
TXCE3+
TXCE3-
TXCE4+
TXCE4-
TXCO3-
TXCO4+
TXCO4-
TXCLKO-
TXCE2-
TXCE2+
TXCE1-
TXCE1+
TXCE0-
TXCE0+
TXCLKE+
TXCLKE-
TXCE3+
TXCE3-
TXCE3-
TXCE3+
TXCLKE-
TXCLKE+
TXCE2-
TXCE2+
TXCE1-
TXCE1+
TXCE0-
TXCE0+
TXCE0-
TXCE0+
TXCO0+
TXCO0-
EAX56856904
H6 LCD MERCURY
LVDS,CTR KEY
4 9
MSTAR
2008/12/16
FHD
X
R402
4.7K
10BIT(FHD)
X
8BIT(HD)
X
X
0
X
32 sharp
R401
0
0
X
52 sharp
8BIT(FHD)
CONTROL KEY
OPC_EABLE
OPC_OUTPUT
External VBR
PANEL WAFER
IR(19/22/26")
(19/22/26")
HD(19/22")
IR(Non 19/22/26)
CONTROL KEY(Non 19/22/26)
*8BIT(FHD):22/27"
HD(26/32/37/42/47")
MAIN_SIF
0.01uF
C501
M_SDA
27pF
C500
+5V_TUNER
TV_MAIN
M_SCL
+5V_TUNER
C504
READY
27pF
C502
10uH
L502
READY
82pF
C507
READY
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.
10uF
16V
C508
120-ohm
L500
READY
ISA1530AC1
Q502
E
B
C
TAFT-H203F
TU500-*1
NTSC_TUNER
14
NC_5
13
V-OUT
5
RF_AGC
12
NC_4
11
MOPLL_AS
2
GND_1
19
NC_8
18
NC_7
10
SCL
4
NC_2
1
NC_1
17
NC_6
9
SDA
8
GND_2
3
+B[5V]
16
SIF-OUT
7
NC_3
6
TP[3.3V_OPT]
15
A-OUT
21
SHIELD
20
NC_9
TAFT-Z203D
TU500
PAL_TUNER
14
NC_5
13
V-OUT
5
RF_AGC
12
NC_4
11
MOPLL_AS
2
GND_1
19
NC_8
18
NC_7
10
SCL
4N
C
_2
1N
C
_1
17
NC_6
9
SDA
8
GND_2
3
+B[5V]
16
SIF-OUT
7N
C
_3
6
TP[3.3V_OPT]
15
A-OUT
21
SHIELD
20
NC_9
4.7K
R502
220
R506
220
R507
100uF
16
V
C505
100uF
16
V
C509
100uF
16
V
C506
120-ohm
L501
47
R504
47
R505
0.1uF
50V
C503
0
L501-*1
0 Ohm
TUNER
5
9
MSTAR
2008/12/16
H6 LCD MERCURY
EAX56856904
Near the pin
0.1uF
C644
0.1uF
C637
M_SDA
1000pF
C606
22000pF
C616
22000pF
C623
+1.8V_DVDD
1000pF 50V
C651
0.47uF
C632
MULTI_PW_SW
0.1uF
C605
+1.8V_DVDD
0.1uF
C615
0.1uF
C629
AMP_MUTE_HOTEL
+3.3V_MULTI_MST
0.1uF
C643
DA-8580
EAP38319001
L607
2S
1S
1F
2F
0.1uF
C617
0.1uF
C602
0.01uF
C647
SPK_R+
M_SCL
0.1uF
C610
DA-8580
EAP38319001
L603
2S
1S
1F
2F
22000pF
C611
SPK_L+
+1.8V_AVDD
SPK_L-
0.1uF
C669
+16V_NTP
+16V_NTP
SPK_R-
100pF
C601
22000pF
C625
+1.8V_AVDD
0.01uF
C672
0.01uF
C648
1000pF
C603
SW_RESET
0.47uF
C673
0.01uF
C671
0.1uF
C626
0.01uF
C613
330uF
35
V
C612
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.
SPK_L-
SPK_R+
+1.8V_DVDD
SPK_R-
SMAW250-04
P600
1
2
3
4
SPK_L+
+1.8V_AVDD
+1.8V
I2S_MCLK
I2S_SDO
I2S_WS
I2S_SCK
390pF
C619
390pF
C621
390pF
C630
390pF
C634
1uF
C608
1uF
C618
1uF
C624
1uF
C614
0.1uF
50V
C607
10uF
35V
C642
READY
+12V_AUDIO
MNT_R_AMP
+12V_AUDIO
RT1C3904-T112
Q600
E
B
C
RT1C3904-T112
Q601
E
B
C
MNT_L_AMP
0.01uF
C635
MNT_ROUT
+12V_AUDIO
LM324D
IC601
3
INPUT1+
2
INPUT1-
4
VCC
1
OUT1
6
INPUT2-
5
INPUT2+
7
OUT2
8
OUT3
9
INPUT3-
10
INPUT3+
11
GND
12
INPUT4+
13
INPUT4-
14
OUT4
6800pF
C628
6800pF
C627
MNT_LOUT
AUDIO_R
SPK_R-_HOTEL
SPK_R+_HOTEL
12505WR-09A00
HOTEL_OPT
P601
1
2
3
4
5
6
7
8
9
10
0.1uF HOTEL_OPT
C636
+16V_NTP
RT1C3904-T112 HOTEL_OPT
Q602
E
B
C
AMP_MUTE_HOTEL
+3.3V_MULTI_MST
SW_RESET
10uF 16V
C600
10uF 16V
C604
10uF
16
V
C609
3.3
R604
12
R608
12
R611
12
R610
12
R638
4.7K
R663
4.7K
R623
3.3
R626
3.3
R625
100
R601
3.3K
R600
100
R676
100
R677
100
R678
100
R602
100
R603
0
R656
HOTEL_OPT
0
R673
12
R658
12
R653
12
R621
12
R654
4.7K
R628
4.7K
R667
3.3
R671
3.3
R635
1K
R607
10K
NON_HOTEL_OPT
R613
12K
HOTEL_OPT
R613-*
5.6K
R614
5.6K
R615
10K
NON_HOTEL_OPT
R616
12K
HOTEL_OPT
R616-*
1K
R609
4.7K
R606
200
HOTEL_OPT
R612
10K HOTEL_OPT
R617
0
HOTEL_OPT
R620
0
HOTEL_OPT
R619
4.7K
R605
33pF
C631
33pF
C633
0.1uF
C620
0.1uF
C622
6.8K
R618
6.8K
R622
NTP-3100L
IC600
1
BST1A
2
VDR1A
3
RESET
4
AD
5
DVSS_1
6
VSS_IO
7
CLK_I
8
VDD_IO
9
DGND_PLL
10
AGND_PLL
11
LFM
12
AVDD_PLL
13
DVDD_PLL
14
TEST0
15
DVSS_2
16
DVDD
17
SDATA
18
WCK
19
BCK
20
SDA
21
SCL
22
MONITOR_0
23
MONITOR_1
24
MONITOR_2
25
FAULT
26
VDR2B
27
BST2B
28
PGND2B_1
29
PGND2B_2
30
OUT2B_1
31
OUT2B_2
32
PVDD2B_1
33
PVDD2B_2
34
PVDD2A_1
35
PVDD2A_2
36
OUT2A_1
37
OUT2A_2
38
PGND2A_1
39
PGND2A_2
40
BST2A
41
VDR2A
42
NC
43
VDR1B
44
BST1B
45
PGND1B_1
46
PGND1B_2
47
OUT1B_1
48
OUT1B_2
49
PVDD1B_1
50
PVDD1B_2
51
PVDD1A_1
52
PVDD1A_2
53
OUT1A_1
54
OUT1A_2
55
PGND1A_1
56
PGND1A_2
MLB-201209-0120P-N2
0LCML00003B
120-ohm
L605
MLB-201209-0120P-N2
0LCML00003B
120-ohm
L606
33pF 50V
C638
READY
33pF
50V
C639
READY
+3.3V_MST
10K
R630
RT1C3904-T112
Q603
E
B
C
10K
R629
MULTI_PW_SW
0
R627
READY
0
R624
READY
22K
R631
READY
SPK_L-
H6 LCD MERCURY
EAX56856904
AUDIO
MSTAR N-EU
2008/12/16
6 9
Main AMP
AMP :GAIN X 4
Chinese Hotel Option
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