DOWNLOAD LG 26LN45XX / 26LN4500 (CHASSIS:LJ31A / LD31T) Service Manual ↓ Size: 6.06 MB | Pages: 30 in PDF or view online for FREE

Model
26LN45XX 26LN4500 (CHASSIS:LJ31A LD31T)
Pages
30
Size
6.06 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
26ln45xx-26ln4500-chassis-lj31a-ld31t.pdf
Date
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LG 26LN45XX / 26LN4500 (CHASSIS:LJ31A / LD31T) Service Manual ▷ View online

U
S
B
 
D
O
W
N
 
S
T
R
E
A
M
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
R444
15K
JK403
XRJV-01V-0-D12-080
SUB(ETHERNET_XMULTIPLE(MP))
1
2
3
4
5
6
7
8
9
9
R416
0
(OPT)IR_OUT
JP402
R405
0
OPT
C419
47pF
50V
R446
10K
+3.3V_ST
R441
470K
OPT
R429 0
JK404
KJA-PH-1-0177
Hotel_Model(RS232C apply)
3
M3_DETECT
4
M4
5
M5_GND
1
M1
6
M6
C407
0.33uF
16V
Hotel_Model(RS232C apply)
R421
0
VA419
20V
C421
47pF
50V
JP403
JP411
JP_GND2
VA408
20V
OPT
C401
18pF
50V
OPT
C406
0.33uF
16V
Hotel_Model(RS232C apply)
C403
18pF
50V
OPT
R409
1K
IR_OUT
JP400
JP413
R419
47
+3.3V_ST
R404
0
OPT
C408
0.1uF
16V
Hotel_Model(RS232C apply)
JP427
DSUB_VSYNC
2:E18
R413
10K
VA426
5.5V
OPT
D416
MMBD6100
A2
C
A1
PM_TXD
JP412
C420
47pF
50V
+3.3V_ST
VA402
5.5V
C410
0.01uF
50V
LAN JACK
JP_GND4
R434
47K
JP409
+3.3V_ST
R435
10K
IC401
MAX3232CDR
Hotel_Model(RS232C apply)
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
R402
75
VA415
20V
R406
0
OPT
R431
0
OPT
JP414
R407
470K
JP_GND1
JP404
DSUB_G+
C400
0.1uF
C404
10uF
10V
OPT
PM_RXD
EPHY_RN
C402
0.33uF
16V
Hotel_Model(RS232C apply)
JP407
USB_OCD
PM_RXD
VA412
20V
R410
0
NON_Hotel_Model(RS232C Bypass)
R447
10K
VA405
5.5V
OPT
Q400
MMBT3904(NXP)
E
B
C
MGJ63348201
M1
JackShield(for NonCKD)
JP406
JP401
R400
75
JK402
3AU04S-305-ZC-(LG)
1
2
3
4
5
PC_L_IN
L403
BLM15BD121SN1 
C409
0.1uF
16V
Hotel_Model(RS232C apply)
EPHY_TN
R415
100
R442
470K
OPT
R414
100
VA407
20V
OPT
R445
15K
USB_CTL
VA420
20V
DSUB_DET
JP410
+3.3V_Normal
VA400
20V
R417
10K
JK401
KJA-PH-1-0177
3
M3_DETECT
4
M4
5
M5_GND
1
M1
6
M6
DSUB_R+
MGJ63348202
M1-*1
JackShield(for CKD)
JK400
SPG09-DB-010
1
R
E
D
2
G
R
E
E
N
3
B
L
U
E
4
G
N
D
_
1
5
D
D
C
_
G
N
D
6
R
E
D
_
G
N
D
7
G
R
E
E
N
_
G
N
D
8
B
L
U
E
_
G
N
D
9
N
C
1
0
S
Y
N
C
_
G
N
D
1
1
G
N
D
_
2
1
2
D
D
C
_
D
A
T
A
1
3
H
_
S
Y
N
C
1
4
V
_
S
Y
N
C
1
5
D
D
C
_
C
L
O
C
K
1
6
S
H
I
L
E
D
EPHY_TP
VA404
5.5V
OPT
+5V_USB
VA409
5.5V
OPT
C414
220pF
50V
L402
BLM15BD121SN1 
JP429
R426 0
RGB_DDC_SCL
JP428
PM_TXD
IC400
AP2191DSG
3
IN_2
2
IN_1
4
EN
1
GND
5
FLG
6
OUT_1
7
OUT_2
8
NC
R412
0
NON_Hotel_Model(RS232C Bypass)
PC_AUDIO_DET
R411
0
LAN JACK
VA425
20V
C413
220pF
50V
DSUB_HSYNC
2:E18
PC_R_IN
USB_DM
1:AL8
+5V_Normal
VA403
5.5V
RGB_DDC_SDA
EPHY_RP
R401
75
VA410
20V
OPT
+3.3V_Normal
VA417
20V
VA401
20V
R418
47K
R408
10K
JP_GND3
VA406
5.5V
VA411
20V
L401
BLM15BD121SN1 
R403
0
OPT
USB_DP
1:AL7
JP408
P400
12507WS-04L
1
2
3
4
5
C405
0.1uF
R427 0
VA418
20V
VA424
20V
JP405
R420
0
OPT
DSUB_B+
JK403-*1
RJ45VT-01SN002
MAIN(ETHERNET)
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
ZD401
5.6B
LAN JACK
ZD400
5.6B
LAN JACK
4     12
To Improve EMI
111026
ESD diode deletion
EAH39491601 2EA
USB(SIDE)
120103
ESD diode addition
EAF61530301 2EA
PC AUDIO(SIDE)
111026
LAN Jack deletion
DSUB RGB
11.10.27
111117
LAN Jack Addition for T2
Jack Shield (HDMI1, HDMI2, RGB)
ETHERNET
To Improve Ringing issue
LOW capacitance Part apply
12.07.02
BY.Hwang
11.10.31
NC4_S7LRM
RS232C(SIDE)
12.08.10
47K->470K
EAX65077302
2012.11.18
120918
JIG GND Point addition
121128
ESD improve
OPT->APPLY
121128
ESD improve
OPT->APPLY
121128
ESD improve
OPT->APPLY
121128
ESD improve
OPT->APPLY
121128
ESD improve
OPT->APPLY
121128
ESD improve
OPT->APPLY
121128
ESD improve
OPT->APPLY
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.
HDMI
5     12
D506
RCLAMP0524PA
(OPT)ESD_HDMI_SEMTECH(DEV)
1
8
2
7
3
6
4
5
9
10
D507
RCLAMP0524PA
(OPT)ESD_HDMI_SEMTECH(DEV)
1
8
2
7
3
6
4
5
9
10
R513
10K
OPT
/VBUS_EN
R510
10K
OPT
R522
2.7K
R533
20K
LN4500
R526
0
(OPT)HDMI1_ARC
D507-*1
IP4283CZ10-TBA
ESD_HDMI_NXP
3
GND_1
2
TMDS_CH1+
4
TMDS_CH2-
1
TMDS_CH1-
5
TMDS_CH2+
6
NC_1
7
NC_2
8
GND_2
9
NC_3
10
NC_4
D504
RCLAMP0524PA
(OPT)ESD_HDMI_SEMTECH(DEV)
1
8
2
7
3
6
4
5
9
10
D505
RCLAMP0524PA
(OPT)ESD_HDMI_SEMTECH(DEV)
1
8
2
7
3
6
4
5
9
10
R535
2.7K
LN4500
AVDD5V_MHL
R505
10K
OPT
IC500
BD82020FVJ 
LN4500
3
IN_2
2
IN_1
4
EN
1
GND
5
OC
6
OUT_1
7
OUT_2
8
OUT_3
+3.3V_Normal
R536
0
LN4500
R506
47K
OPT
D1+_HDMI2
R519
10K
LN4500
Q508
LN4500
E
B
C
Q506
LN4500
E
B
C
HDMI_ARC
5V_HDMI_2
R531
0
5V_HDMI_2
C502
0.047uF
25V
LN4500
R512
0
1/16W
5%
LN4500
VA500
20V
OPT
MHL_OCP_EN
D0+_HDMI2
D505-*1
IP4283CZ10-TBA
(OPT)ESD_HDMI_NXP
3
GND_1
2
TMDS_CH1+
4
TMDS_CH2-
1
TMDS_CH1-
5
TMDS_CH2+
6
NC_1
7
NC_2
8
GND_2
9
NC_3
10
NC_4
R532
0
LN4500
R524
10K
LN4500
C500
10uF
10V
LN4500
R509
100
LN4500
VA512
20V
OPT
JK501
EAG61491201
14
13
5
D1_GND
20
SHIELD
12
11
2
D2_GND
19
18
10
CK+
4
D1+
1
D2+
17
9
D0-
8
D0_GND
3
D2-
16
7
D0+
6
D1-
15
D501
MMBD6100
A
2
C
A
1
CK-_HDMI2
D0-_HDMI2
D504-*1
IP4283CZ10-TBA
(OPT)ESD_HDMI_NXP
3
GND_1
2
TMDS_CH1+
4
TMDS_CH2-
1
TMDS_CH1-
5
TMDS_CH2+
6
NC_1
7
NC_2
8
GND_2
9
NC_3
10
NC_4
CK+_HDMI2
D506-*1
IP4283CZ10-TBA
ESD_HDMI_NXP
3
GND_1
2
TMDS_CH1+
4
TMDS_CH2-
1
TMDS_CH1-
5
TMDS_CH2+
6
NC_1
7
NC_2
8
GND_2
9
NC_3
10
NC_4
VA513
20V
OPT
R523
10K
LN4500
R525 0
LN4500
VA503
20V
R538
10K
(OPT)LN4500MHL_OLD
R521
2.7K
R534
10K
LN4500
VA511
20V
OPT
D0+_HDMI1
CK+_HDMI1
D0-_HDMI1
CK-_HDMI1
D2+_HDMI1
D2-_HDMI1
D1+_HDMI1
VA502
20V
D1-_HDMI1
VA510
20V
OPT
VA509
20V
OPT
VA507
20V
OPT
+3.3V_ST
VA508
20V
OPT
R530
0
MN33D
R528
1K
MN33D
HDMI_ARC
Q505
MMBT3904(NXP)
MN33D
E
B
C
R529
10K
MN33D
HPD2
DDC_SCL_2
HDMI_CEC
R518
2.7K
R537
0
(OPT)LN4500MHL_OLD
+5V_ST
R508
10K
OPT
R520
100
D2-_HDMI2
R514
10K
OPT
D1-_HDMI2
R517
2.7K
R500
47K
VA505
OPT
+5V_Normal
CEC_REMOTE_S7
+3.3V_Normal
VA501
20V
OPT
R502
1K
OPT
DDC_SCL_1
Q500
MMBT3904(NXP)
OPT
E
B
C
DDC_SDA_1
5V_HDMI_1
R515
10K
LN4500
+3.3V_Normal
Q507
LN4500
E
B
C
R527
0
(OPT)HDMI2_ARC
DDC_SCL_2
Q504
MMBT3906(NXP) 
OPT
E
B
C
R503
47K
VA504
OPT
VA514
20V
OPT
DDC_SCL_1
D500
30V
MBR230LSFT1G
LN4500
MHL_CD_SENSE
HPD1
+5V_Normal
5V_HDMI_1
DDC_SDA_2
Q503
MMBT3904(NXP)
OPT
E
B
C
/MHL_OCP_DET
5V_DET_HDMI_2
5V_HDMI_2
D502
MMBD6100
A
2
C
A
1
R501
10K
HDMI_CEC
JK500
EAG61491201
OPT
14
13
5
D1_GND
20
SHIELD
12
11
2
D2_GND
19
18
10
CK+
4
D1+
1
D2+
17
9
D0-
8
D0_GND
3
D2-
16
7
D0+
6
D1-
15
D503
MMBD6100
A
2
C
A
1
Q502
MMBT3904(NXP)
OPT
E
B
C
Q501
MMBT3904(NXP)
E
B
C
5V_DET_HDMI_1
+3.3V_ST
C503
0.1uF
LN4500
VA506
OPT
5.6V
DDC_SDA_2
DDC_SDA_1
HDMI_CEC
R516
100K
OPT
+3.3V_ST
D2+_HDMI2
R504
47K
OPT
+3.3V_ST
R507
300K
R539
0
MHL 5V from USB
+5V_USB
R511
10
NC4_S7LRM
HDMI_1
CEC
HDMI_2 With MHL
120715
Added for ESD prevention
120825
OPT->APPLY
MHL OCP
HDMI
EAX65077302
2012.11.18
120715
Added for ESD prevention
120825
OPT->APPLY
120825
ESD component addition
120825
ESD component addition
(Active Low)
(Active High)
120915
22->100ohm
120915
47K->2.7K
121109
Change 0ohm -> 10ohm
(EOS Issue..Mstar Recommand)
121118
LN4500->APPLY
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.
MODULE&CONTROL
IR
R603
10K
L600
BLM18PG121SN1D
D603
20V
OPT
JP605
C603
100pF
50V
OPT
C605
0.1uF
50V
KEY_SCL
R620
0
OPT
R
6
2
7
4
.
7
K
RXA1+
C607
1000pF
50V
RXA1-
RXA2-
R616
3.3K
C606
10uF
25V
LED_AMBER
JP607
KEY2
R602
10K
RXACK+
JP600
RXA2+
+3.3V_ST
RXA3+
R615
100
R629
0
21.6"/26"
IR_OUT
C601
1000pF
50V
JP602
R
6
2
5
4
.
7
K
C600
0.1uF
50V
+3.3V_ST
+3.3V_ST
R619
10K
(OPT)IR_OUT
R621
10K
(OPT)IR_OUT
JP608
R614
100
+3.3V_ST
JP610
LED_RED
Q600
MMBT3904(NXP)
E
B
C
D600
20V
R622
10K
(OPT)IR_OUT
JP601
JP609
C602
100pF
50V
OPT
C604
1000pF
(OPT)IR_OUT
IR
D601
20V
RXACK-
R601
10K
Q602
MMBT3904(NXP)
(OPT)IR_OUT
E
B
C
+3.3V_ST
R617
3.3K
KEY_SDA
P600
12507WR-12L
1
2
3
4
5
6
7
8
9
10
11
12
13
R618
22
(OPT)IR_OUT
R623
47K
(OPT)IR_OUT
JP604
JP606
Q603
MMBT3904(NXP)
(OPT)IR_OUT
E
B
C
RXA0+
Q601
MMBT3904(NXP)
E
B
C
RXA0-
KEY1
D602
20V
OPT
JP611
R600
10K
RXA3-
+3.3V_ST
R
6
2
6
4
.
7
K
R
6
2
4
4
.
7
K
JP612
+12V_PANEL_POWER
P601
10031HR-30
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
JP603
R628
0
R630
200
R604
270
1/10W
1%
R610
330
1/10W
1%
6     12
12.07.17
Change D601~3
IR_OUT(Ready)
IR/LED and Control
NC4_S7LRM
0~0.7V
2012.04.13
1K/10W -> 4.7K/10W 
2.7~3.3V
PIN22
Module 
JEDIA
VESA
2012.04.13
10uF/10V -> 10uF/25V
111116
100uF Ecap
Deletion
EAE38362801
EAX65077302
2012.11.18
PIN23
GND
NC
CMI
LGD
121018
100ohm->200ohm
(IR Port protection against ESD)
121118
R604,R610
2012->1608
Amber LED(Non M73):5.9mA
Red LED(Non M73):4.8mA
THERMAL
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.
AUDIO AMP
7     12
R700
3.3
OPT
R709
100
TP700
C711
22000pF
50V
HP_DET
R717
12
L709
LPH6045T-100M 
Audio_Coil_ABCO
10uH
C708
33pF
50V
C726
1uF
25V
D709
MMBD6100
LN4500
A2
C
A1
C734
0.47uF
50V
+19V_AMP_VCC
HP_LOUT
C743
1uF
25V
C701
0.1uF
16V
OPT
Q704
MMBT3904(NXP)
LN4500
E
B
C
C717
1000pF
50V
OPT
Q702
MMBT3906(NXP) 
E
B
C
C730
390pF
50V
C735
0.47uF
50V
R735
220K
OPT
AMP_RST
C728
390pF
50V
R711
1K
LN4500
R703
100
D710
KDS226
A
AC
C
TP701
0.1uF
C713
50V
R710
1K
LN4500
Q701
MMBT3904(NXP)
LN4500
E
B
C
C745
47uF
25V
R719
12
0.1uF
C739
50V
D700
MMBD6100
A2
C
A1
D704
100V
1N4148W
OPT
C705
33pF
50V
AMP_SCL
Q705
MMBT3904(NXP)
LN4500
E
B
C
C720
10uF
10V
LN4500
C716
10uF
25V
C703
0.01uF
50V
OPT
R714
3.3K
LN4500
R728
5.1K
D706
100V
1N4148W
OPT
R737
12K
0.1uF
C737
50V
SB_MUTE
C742
4.7uF
50V
L706
LPH6045T-100M 
Audio_Coil_ABCO
10uH
C706
1000pF
50V
R708
33K
OPT
JP701
C729
390pF
50V
JP702
C744
47uF
25V
C702
10uF
10V
R712
12
NTP_MUTE
JP704
Q700
MMBT3904(NXP)
E
B
C
AUD_SCK
HP_MUTE
R716
0
SB_MUTE
C709
1000pF
50V
P700
SMAW250-H04R
WAFER-ANGLE
1
2
3
4
JP700
SB_MUTE
0.1uF
C738
50V
R730
5.1K
+19V_AMP_VCC
R718
12
L700-*1
NRS6045T100MMGK
(OPT)Audio_Coil_TAIYO
10.0uH
AUD_LRCH
AUD_LRCK
C721
10uF
10V
LN4500
R733
10K
LN4500
R727
5.1K
Q706
MMBT3906(NXP) 
LN4500
E
B
C
JP706
IC700
NTP7513
3
DGND_PLL
2
VDD_PLL
4
GND
1
AGND_PLL
6
DVDD
5
DGND
7
SDATA
8
WCK
9
BCK
10
SDA
11
SCL
12
FAULT
13
MONITOR_0
14
MONITOR_1
15
MONITOR_2
16
BST2B
17
PGND2B
18
OUT2B
19
PVDD2B
20
PVDD2A
21
OUT2A
22
PGND2A
23
BST2A
24
VDR2
25
AGND
26
VCC5
27
VDR1
28
BST1B
29
PGND1B
30
OUT1B
31
PVDD1B
32
PVDD1A
33
OUT1A
34
PGND1A
35
BST1A
36
RESET
37
AD
38
CLK_I
39
GND_IO
40
VDD_IO
41
[EP]GND
R738
12K
AUD_MASTER_CLK
+3.3V_AMP
C723
22000pF
50V
L701
LPH6045T-100M 
Audio_Coil_ABCO
10uH
L709-*1
NRS6045T100MMGK
(OPT)Audio_Coil_TAIYO
10.0uH
C700
0.1uF
16V
0.1uF
C712
50V
R704
12
C724
47uF
25V
R701
10K
+3.3V_ST
R707
100
AMP_SDA
D707
100V
1N4148W
OPT
R736
470
0.1uF
C714
50V
0.1uF
C715
50V
R702
12
0.1uF
C740
50V
R729
5.1K
R705
10K
R715
12
+3.3V_Normal
C719
1000pF
50V
OPT
VA702
20V
LN4500
L701-*1
NRS6045T100MMGK
(OPT)Audio_Coil_TAIYO
10.0uH
R706
47K
LN4500
JP707
JK700
KJA-PH-1-0177-2
LN4500
3
M3_DETECT
4
M4
5
M5_GND
1
M1
6
M6
0.1uF
C704
16V
OPT
R713
1K
LN4500
C731
390pF
50V
L706-*1
NRS6045T100MMGK
(OPT)Audio_Coil_TAIYO
10.0uH
L700
LPH6045T-100M 
Audio_Coil_ABCO
10uH
R720
12
0.1uF
C707
16V
C718
10uF
25V
C710
22000pF
50V
JP705
D705
100V
1N4148W
OPT
JP703
C727
1uF
25V
Q707
MMBT3904(NXP)
LN4500
E
B
C
1uF
C725
10V
R734
220K
TP702
HP_ROUT
+3.3V_ST
C722
22000pF
50V
Q703
MMBT3904(NXP)
LN4500
E
B
C
VA703
20V
OPT
VA701
20V
LN4500
+19V
R739
0
1/16W
5%
LN4500
NC4_S7LRM
SPK_R-
SPK_L+
SPK_L-
MUTE control
12.08.09
SPK_R+
0x54
AUDIO AMP
Headphone block
Pop-up noise killer
11.10.27
Apply->OPT
2.7K->220K
11.10.27
EAX65077302
2012.11.18
12.08.20
12.08.20
12.11.07
1K->0 by JHShin 
to solve pop-noise issue 
12.08.16
Added by JCPark
121118
R737 3K for SCART MUTE DEL
3K: 
With SCART MUTE BLOCK
12K:
Without SCART MUTE BLOCK
121118
OPTION added for LN4500 
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