DOWNLOAD LG 55LD650 (CHASSIS:LT03B) Service Manual ↓ Size: 14.94 MB | Pages: 99 in PDF or view online for FREE

Model
55LD650 (CHASSIS:LT03B)
Pages
99
Size
14.94 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
55ld650-chassis-lt03b.pdf
Date
PREV: LG 55LD650 (CHASSIS:LB03B) Service Manual

LG 55LD650 (CHASSIS:LT03B) 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 4 locations.
<ALL MODELS>
LCD  TV
A1
2010. 2 .19
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 20V/24V, 12V, 3.5V and Inverter on
IOP 42”/47”, Edge LED 55”
Edge LED 32/42/47”
Error
NC
(Edge LED:PWM Dim#1)
Inverter ON
PWM Dim #1
(Edge LED : NC)
GND
24V
P204
14
13
12
11
6~10
1~5
Inverter ON
PWM Dim #1
GND
24V
P205
12
11
6~10
1~5
2010. 2 .19
IOP 55”
* 14
:   For LE85 GND
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>
A4
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. 2 .19
Standard Repair Process Detail Technical Manual
Power Board voltage measuring method
A. Video error_No video/ Audio
A5
Established 
date 
Revised 
date 
Error 
symptom
Content
LCD  TV
A4
Check the DC 20V/24V, 12V, 3.5V.
Error-out
24
NC
23
LE : PWM Dim #1
IOP : NC
22
12V
21
LE : NC
IOP : PWM Dim #1
20
12V
19
Inverter ON
18
12V
17
NC
16
GND
15
GND
14
GND
13
3.5V
12
3.5V
11
3.5V
10
3.5V
9
GND
8
GND
7
GND
6
GND
5
24V
4
24V
3
24V 
(IOP & Edge 55”)
20V (
Edge 42/47
)
2
Power 
on
1
Pin layout (24P)
IOP 47”/Edge LED 55”
Edge LED 32/42/47”
2010. 2 .19
IOP 55”
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