DOWNLOAD LG 55LW9800-TA (CHASSIS:LB12D) Service Manual ↓ Size: 16.59 MB | Pages: 104 in PDF or view online for FREE

Model
55LW9800-TA (CHASSIS:LB12D)
Pages
104
Size
16.59 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
55lw9800-ta-chassis-lb12d.pdf
Date
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LG 55LW9800-TA (CHASSIS:LB12D) Service Manual ▷ View online

Established 
date 
Standard Repair Process Detail Technical Manual
Revised 
date 
A1
Error 
symptom
Content
Check LCD back light with naked eye
A. Video 
error_No
video/Normal audio 
After turning on the power and disassembling the case, check with the naked eye, 
whether you can see light from module
<XXLW9800 MODELS>
LCD  TV
A1
2010. 12 .14
Standard Repair Process Detail Technical Manual
LED driver  B+ 24V measuring method
A. Video error_No video/Normal audio 
A2
Established 
date 
Revised 
date 
Error 
symptom
Content
LCD  TV
A2
Check the DC 24V, 12V, 3.5V and Inverter on
ALEF LED 
P203
1~5
24V
6~10
GND
11
Error
12
Inverter ON
13
A-dim
14
P-dim
P202
1~5
24V
6~10
GND
11
Error
12
Inverter ON
13
A-dim
14
P-dim
2010. 12 .14
Entry method
1. Press the ADJ button on the remote controller for adjustment.
2. Enter into White Balance of item 6. 
3. After recording the R, G, B (GAIN, Cut) value of Color Temp 
(Cool/Medium/Warm), re-enter the value after replacing the MAIN BOARD.
Standard Repair Process Detail Technical Manual
Check White Balance value
A. Video error_No video/Normal audio 
<ALL MODELS>
A3
Established 
date 
Revised 
date 
Error 
symptom
Content
LCD  TV
A3
Entry method
1. Press the ADJ button on the remote controller for adjustment.
2. Enter into White Balance of item 7. 
3. After recording the R, G, B (GAIN, Cut) value of Color Temp 
(Cool/Medium/Warm), re-enter the value after replacing the MAIN BOARD.
2010. 12 .14
Standard Repair Process Detail Technical Manual
Power Board voltage measuring method
A. Video error_No video/ Audio
A4
Established 
date 
Revised 
date 
Error 
symptom
Content
LCD  TV
A4
Check the DC 24V, 12V, 3.5V.
24 Pin
(Power Board ↔ Main Board) -
공통
SMAW200-H24S (YEONHO)
1
Power on
2
20V (24V)
3
20V (24V)
4
20V (24V)
5
GND
6
GND
7
GND
8
GND
9
3.5V
10
3.5V
11
3.5V
12
3.5V
13
GND
14
GND
15
GND
16
GND
17
12V
18
Inverter On/off
19
12V
20
Lamp : A-Dim
LED : N.C
21
12V
22
PWM Dim #1
23
N.C 
•
Lamp SCANNING Model
: PWM Dim #2
24
Error-out
ALEF LED 
2010. 12 .14
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