LG 32LN5650 (CHASSIS:LB31J) 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
2013/01/24
57
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_BEAD_SAMSUNG
L1101
CIS21J121
120
HD_BEAD_SAMSUNG
R1105
0
NON_AUO/NON_HD
R1106
0
NON_AUO/NON_HD
R1107
0
NON_AUO/NON_HD
L1100-*1
UBW2012-121F
UBW2012-121F
FHD_BEAD_CSG
L1101-*1
UBW2012-121F
UBW2012-121F
HD_BEAD_CSG
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.
1
Contents of LCD TV Standard Repair Process Detail Technical Manual
No.
Error symptom
Content
Page
Remarks
1
A. Video error_ No video/Normal audio
Check LCD back light with naked eye
A1
2
LED driver B+ measuring method
A2
3
Check White Balance value
A3
4
Power Board voltage measuring method
A4
6
A. Video error_ No video/Video lag/stop
TUNER input signal strength checking method
A5
7
LCD-TV Version checking method
A6
9
A. Video error_Color error
LCD TV connection diagram
A7
10
11
Check Link Cable (LVDS) reconnection
condition
condition
A8
A9
A9
12
Adjustment Test pattern - ADJ Key
A10
13
A. Video error_Vertical/Horizontal bar,
residual image, light spot
residual image, light spot
LCD TV connection diagram
A8
14
Check Link Cable (LVDS) reconnection
condition
condition
A8
A9
A9
15
Adjustment Test pattern - ADJ Key
A10
16
<Appendix>
Defected Type caused by T-Con/
Inverter/ Module
Defected Type caused by T-Con/
Inverter/ Module
Exchange T-Con Board (1)
A-1/5
17
Exchange T-Con Board (2)
A-2/5
18
Exchange LED driver Board (PSU)
A-3/5
19
Exchange Module itself (1)
A-4/5
20
Exchange Module itself (2)
A-5/5
Continue to the next page
2
Normal
audio
Y
N
Move to No
video/No audio
No video
Normal audio
Check Back Light
On with naked eye
On
Y
N
Check Power Board
24v, 12v,3.5v etc.
Normal
voltage
Y
N
Replace T-con Board
or module
Repair Power Board
or parts
Check Power Board 93.2~118.5V
v output
Normal
voltage
Y
Replace Inverter
or module
N
Repair Power
Board or parts
End
Always check & record S/W Version and White
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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