LG 47LD650 (CHASSIS:LL03B) Service Manual ▷ View online
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
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
Checking order when there is no audio
① Check the contact condition of 20V or 24V connector of Main Board
② Measure the 24V input voltage supplied from Power Board
(If there is no input voltage, remove and check the connector)
③ Connect the tester RX1 to the speaker terminal and if you hear the Chik Chik sound when you touch the GND
and output terminal, the speaker is normal.
and output terminal, the speaker is normal.
Standard Repair Process Detail Technical Manual
Voltage and speaker checking method
when there is no audio
when there is no audio
C. Audio error_No audio/Normal video
<ALL MODELS>
A25
Established
date
Revised
date
Error
symptom
Content
LCD TV
A25
Edge LED 32/42/47”
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)
①
②
③
2010. 2 .19
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