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
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Standard Repair Process Detail Technical Manual
Check power input voltage and ST-BY 5V
B. Power error _No power
A18
Established 
date 
Revised 
date 
Error 
symptom
Content
LCD  TV
A18
Check the 3.5V when st-by
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”
For ’10 models, there is no voltage out for st-by purpose. 
When st-by, only 3.5V is normally on.
2010. 2 .19
IOP 55”
Standard Repair Process Detail Technical Manual
Checking method when power is ON
B. Power error _No power
A19
Established 
date 
Revised 
date 
Error 
symptom
Content
LCD  TV
A19
Check “power on” pin is high
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”
Entry method
1. Press the IN-START button of the remote controller 
for adjustment
2. Check the entry into adjustment item 3
Standard Repair Process Detail Technical Manual
POWER OFF MODE checking method
B. Power error _Off when on, off whiling viewing
<ALL MODELS>
A22
Established 
date 
Revised 
date 
Error 
symptom
Content
LCD  TV
A22
2010. 2 .19
Checking method
1. Press the MENU button on the remote controller
2. Select the AUDIO function of the Menu
3. Select TV Speaker from Off to On
Standard Repair Process Detail Technical Manual
Checking method in menu when there is no audio
C. Audio error_No audio/Normal video
<ALL MODELS>
A24
Established 
date 
Revised 
date 
Error 
symptom
Content
LCD  TV
A24
2010. 2 .19
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