LG 47LW5400-TA (CHASSIS:LB01U) 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.
3D_SYNC_RF
P3401
12507WR-12L
3D_SG
1
3.3V
2
GND
3
RX
4
TX
5
RESET
6
DC
7
DD
8
GND
9
GPIO_0
10
GPIO_1
11
GPIO_2
12
3D_SYNC
13
.
R3406
22
22
3D_SG
M_REMOTE_RX
R3405
22
22
3D_SG
R3402
100
100
3D_SG
R3408
100
100
3D_SG
L3401
120-ohm
3D_SG
R3411
2.7K
3D_SG
+3.3V_Normal
R3410
2.7K
3D_SG
R3412
2.7K
3D_SG
DD_MREMOTE
M_RFModule_RESET
R3403
22
22
3D_SG
+3.3V_Normal
M_REMOTE_TX
R3401
100
100
3D_SG
3D_GPIO_2
3D_GPIO_1
R3404
22
22
3D_SG
R3409
100
100
3D_SG
DC_MREMOTE
R3407
100
100
3D_SG
1
1
1
0
0
1
RESERVED
GPOIO_0
0
ALL 3D-SG OPTION
1
RESERVED
1
GPOIO_2
3D Off
50Hz
FREQ.
0
1
59.94Hz
1
0
1
1
0
GPOIO_1
0
0
0
0
0
60Hz
TI solution RF-3D OPTION
1
RESERVED
3D_GPIO_0
0
1
RESERVED
Contents of LCD TV Standard Repair Process
No.
Error symptom (High category)
Error symptom (Mid category)
Page
Remarks
1
A. Video error
No video/Normal audio
1
2
No video/No audio
2
3
Video error, video lag/stop
3
4
Color error
4
5
Vertical/Horizontal bar, residual image,
light spot, external device color error
light spot, external device color error
5
6
B. Power error
No power
6
7
Off when on, off while viewing, power auto
on/off
on/off
7
8
C. Audio error
No audio/Normal video
8
9
Wrecked audio/discontinuation/noise
9
10
D. Function error
No response in remote controller, key error,
recording error, memory error
recording error, memory error
10
11
External device recognition error
11
12
E. Noise
Circuit noise, mechanical noise
12
13
F. Exterior error
Exterior defect
13
1. Trouble Shooting
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 Main Board
3.5V,12V,3.3V,
1.26V, 1.5V etc.
3.5V,12V,3.3V,
1.26V, 1.5V etc.
Normal
voltage
Y
N
Replace T-con
Board or module
Board or module
Repair Power
Board or parts
Board or parts
Check Power Board 24V,12V,3.5V 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
1/13
LCD TV
Error
symptom
A. Video error
No video/ Normal audio
☞A4
☞A1
☞A2
☞A28
☞A7 & 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,,,)
1
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