LG 42LA61XX / 42LA6130 / 42LA6134 / 42LA6136 / 42LA613S / 42LA613V / 42LA615V (CHASSIS:LD31B) 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.
LVDS_EU
2012/06/22
11
NC4_S7LRM
R1100
3.3K
3.3K
OPT
RXB0-
RXA0+
C1101
0.1uF
16V
0.1uF
16V
HD
C1100
0.1uF
16V
0.1uF
16V
FHD
RXBCK-
P1101
FF10001-30
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
RXA1-
RXB4-
+3.3V_Normal
RXB1+
RXBCK+
PANEL_VCC
RXB3+
RXA3-
RXB4+
RXA4-
RXA4+
RXA2+
+3.3V_Normal
RXB2-
R1101
10K
OPT
RXA1+
RXA2-
RXB1-
R1103
3.3K
3.3K
OPT
RXA3+
RXA0-
PANEL_VCC
RXACK-
RXB2+
R1104
10K
10K
OPT
RXB3-
RXB0+
P1100
FI-RE51S-HF-J-R1500
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
RXACK+
RXA2+
RXA2-
RXA3+
RXACK+
RXA1+
RXA3-
RXA0+
RXA1-
RXACK-
RXA0-
L1100
CIS21J121
120
FHD
L1101
CIS21J121
120
HD
RXB1-
RXB0-
RXA4+
RXA1-
Pol-change
RXB4+
RXACK+
RXBCK-
RXA0+
RXA2+
LVDS (EU)
RXA2+
RXBCK-
RXB4-
RXA3+
RXA1+
RXB2+
RXB3-
RXA3-
RXBCK-
RXACK-
RXA2+
RXA1-
RXB1-
RXB3-
RXA3+
RXA2-
RXA0+
RXA4+
Shift
RXBCK+
RXB2-
RXA4+
[51Pin LVDS Connector]
(For FHD 60Hz)
(For FHD 60Hz)
RXACK+
RXA3-
RXACK-
RXB3+
RXA3+
RXA1-
RXB0-
RXA0-
RXACK+
RXB3+
LVDS_SEL
RXA4-
RXB3+
RXA4+
RXA2-
RXA2+
RXA1+
RXB2-
Pol-change
RXB4+
RXB1-
RXA4-
RXACK+
RXB3-
RXB0+
RXB3+
RXBCK+
RXB4-
RXA0+
RXA2+
RXB0+
RXB1+
RXA3-
RXA2-
RXBCK+
RXB4-
RXA0+
RXA4+
RXA2+
RXB3-
RXA0-
RXB0-
RXA4-
RXACK-
RXB0-
RXA4+
RXB2+
RXA1-
RXB2+
RXACK-
RXA3-
RXA1+
RXA3-
RXA1+
RXB3+
RXB3-
RXA3-
RXB1-
RXB4+
FOR FHD REVERSE(10bit)
RXB0+
RXB3-
RXA3+
RXA0+
RXA2-
RXACK-
RXB1-
RXA3+
RXB2-
RXBCK-
RXBCK+
RXA1+
RXA0-
RXA3+
RXA0-
RXB2+
RXB0-
RXA0-
RXB2-
RXACK-
MIRROR
RXB4-
RXA0-
RXB2+
RXA4+
RXB4-
RXA1+
RXB3+
RXB0+
RXB1+
RXA1-
RXA0-
RXA4-
RXB2-
Change in S7LR
RXA4-
RXB2+
MIRROR
RXB1-
RXA3+
RXA1-
RXACK+
RXB3+
RXB0+
RXB4-
RXACK+
RXB1+
RXACK-
RXA4-
RXA1-
RXA2-
RXA0+
RXB0-
RXB1+
RXB4+
RXB2+
RXBCK-
RXB0-
FOR FHD REVERSE(8bit)
RXBCK-
RXBCK+
RXB4+
RXB0+
RXB2-
RXA1+
RXBCK-
RXA2-
RXB1+
RXB1+
RXB1-
RXA4-
RXB4+
[30Pin LVDS Connector]
(For HD 60Hz_Normal)
(For HD 60Hz_Normal)
Change in S7LR
RXB1+
RXB3-
RXA2+
RXA3-
RXA2-
RXB2-
LVDS_SEL
RXBCK+
RXB4-
RXB0+
RXA0+
RXB4+
RXBCK+
RXACK+
EU pin assign is different from NON EU.
Because of position of HD wafer.
Because of position of HD wafer.
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.
REAR_JACK_EU
2012/06/19
28
NC4_S7LRM
JK2801
PSC008-01
EU
1
AUDIO_R_OUT
2
AUDIO_R_IN
3
AUDIO_L_OUT
4
AUDIO_GND
5
B_GND
6
AUDIO_L_IN
7
B_OUT
8
ID
9
G_GND
10
D2B_IN
11
G_OUT
12
D2B_OUT
13
R_GND
14
RGB_GND
15
R_OUT
16
RGB_IO
17
SYNC_GND1
18
SYNC_GND2
19
SYNC_OUT
20
SYNC_IN
21
COM_GND
22
AV_DET
C2817
0.1uF
50V
0.1uF
50V
EU
R2804
470K
R2813
10K
10K
EU
D2804
5.6V
OPT
R2831
10K
10K
SC1_G+/COMP1_Y+
SC1/COMP1_L_IN
COMP2_DET
R2805
470K
SCART1_Rout
R2817
3.9K
3.9K
EU
R2857
220K
EU
+3.3V_Normal
R2819
12K
12K
EU
IC2801
AZ4580MTR-E1
EU
3
IN1+
2
IN1-
4
VEE
1
OUT1
5
IN2+
6
IN2-
7
OUT2
8
VCC
R2808
10K
EU
EU
R2868
10K
10K
EU
C2823
33pF
EU
R2864
470K
OPT
R2814
15K
EU
R2869
10K
EU
COMP2_Pr+
SCART1_MUTE
SC1_ID
COMP2_Pb+
D2814
20V
ESD_SCART
ESD_SCART
R2812
10K
10K
EU
SC1_FB
R2815
22
EU
DTV/MNT_L_OUT
D2808
5.6V
OPT
R2833
12K
+3.5V_ST
R2803
75
R2807
75
75
EU
COMP2_R_IN
R2825
470K
470K
R2862
5.6K
5.6K
EU
D2811
20V
20V
ESD_SCART
R2858
220K
EU
R2810
1K
EU
D2815
5.6V
OPT
COMP2_L_IN
DTV/MNT_L_OUT
R2832
10K
10K
R2816
75
EU
R2861
2.2K
2.2K
EU
R2818
12K
12K
EU
D2810
20V
OPT
DTV/MNT_R_OUT
D2817
5.6V
OPT
R2842
1K
SCART1_Lout
R2837
10K
D2819
5.6V
5.6V
OPT
R2811
75
75
EU
R2802
75
D2812
20V
ESD_SCART
+12V
R2822
75
C2820
330pF
330pF
EU
D2816
20V
ESD_SCART
20V
ESD_SCART
SC1_R+/COMP1_Pr+
D2818
5.6V
5.6V
OPT
R2867
33K
EU
R2860
2.2K
EU
R2823
75
R2863
5.6K
EU
DTV/MNT_L_OUT
C2819
330pF
EU
SC1/COMP1_R_IN
+3.3V_Normal
+3.3V_Normal
AV_CVBS_DET
R2866
33K
33K
EU
R2826
470K
R2834
12K
R2806
75
75
DTV/MNT_R_OUT
C2821
10uF
16V
10uF
16V
EU
R2865
470K
470K
OPT
D2813
20V
20V
ESD_SCART
R2824
75
C2822
10uF
16V
EU
DTV/MNT_R_OUT
R2841
10K
SC1/COMP1_DET
R2838
1K
C2824
33pF
EU
SC1_B+/COMP1_Pb+
COMP2_Y+/AV_CVBS_IN
4.7uF
C2810
EU
C2811
0.1uF
EU
DTV/MNT_VOUT
C2809
0.1uF
0.1uF
EU
+3.3V_Normal
C2802
0.1uF
0.1uF
16V
OPT
SC1_SOG_IN
C2801
47pF
50V
47pF
50V
OPT
SC1_CVBS_IN
0
R2801
EU
D2806
5.6V
OPT
D2807
5.6V
OPT
D2802
5.6V
OPT
JK2802
PPJ245-02
6A
[RD1]C-SPRING
7A
[RD1]E-LUG
4A
[RD1]CONTACT
5B
[WH]C-SPRING
8C
[RD2]E-LUG-S
6C
[RD2]C-SPRING
4C
[RD2]CONTACT
5D
[BL]C-SPRING
4E
[GN]CONTACT
6E
[GN]C-SPRING
7E
[GN]E-LUG
C2816
0.1uF
0.1uF
SCART_MUTE
R2840
2K
SCART_MUTE
R2839
2K
SCART_MUTE
R2844
10K
SCART_MUTE
Q2804
MMBT3906(NXP)
SCART_MUTE
1
2
3
MMBT3904(NXP)
Q2803
SCART_MUTE
MMBT3904(NXP)
Q2802
SCART_MUTE
IC2802
MM1756DURE
EU
3
BIAS
2
GND
4
OUT
1
IN
6
VCC
5
PS
D2821
ESD_COMP_ZENER_ROHM
D2820
ESD_COMP_ZENER_ROHM
D2823
ESD_COMP_ZENER_ROHM
D2822
ESD_COMP_ZENER_ROHM
D2825
ESD_COMP_ZENER_ROHM
D2824
ESD_COMP_ZENER_ROHM
D2825-*1
ESD_COMP_ZENER_KEC
D2824-*1
ESD_COMP_ZENER_KEC
D2821-*1
ESD_COMP_ZENER_KEC
D2823-*1
ESD_COMP_ZENER_KEC
D2820-*1
ESD_COMP_ZENER_KEC
D2822-*1
ESD_COMP_ZENER_KEC
D2827
ESD_SCART_ZENER_ROHM
D2826
ESD_SCART_ZENER_ROHM
D2826-*1
ESD_SCART_ZENER_KEC
D2827-*1
ESD_SCART_ZENER_KEC
SCART / COMPONENT&COMPSIT
CLOSE TO MSTAR
SCART AMP
[SCART AUDIO MUTE]
COMPONENT
FULL SCART
CLOSE TO MSTAR
Normal
audio
Y
N
Move to No
video/No audio
video/No audio
No video
Normal audio
Normal audio
Check Back Light
On with naked eye
On with naked eye
On
Y
N
Check Power Board
24v, 12v,3.5v etc.
24v, 12v,3.5v etc.
Normal
voltage
Y
N
Replace T-con Board
or module
or module
Repair Power Board
or parts
or parts
Check Power Board 93.2~118.5V
v output
Normal
voltage
voltage
Y
Replace Inverter
or module
or module
N
Repair Power
Board or parts
Board or parts
End
Always check & record S/W Version and White
Balance value before replacing the Main Board
Balance value before replacing the Main Board
Replace Main Board
Re-enter White Balance value
※
Precaution
Established
date
Standard Repair Process
Revised date
1/14
LCD TV
Error
symptom
A. Video error
No video/ Normal audio
☞A4
☞A1
☞A2
☞A6 & A3
First of all, Check whether all of cables between board is inserted properly or not.
(Main B/D↔ Power B/D, LVDS Cable,Speaker Cable,IR B/D Cable,,,)
2013. 01 .09
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