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LG LS5750 Series Service Manual

LG LS5750 Series
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Checking order when there is no audio
Check the contact condition of or 24V connector of Main Board
Measure the 24V input voltage supplied from Power Board
(If there is no input voltage, remove and check the connector)
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.
Standard Repair Process Detail Technical Manual
Voltage and speaker checking method
when there is no audio
C. Audio error_No audio/Normal video
<ALL MODELS>
A25
Established
date
Revised
date
Error
symptom
Content
LCD TV
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 GND/P_DIM2 24 Error-out
2010. 12 .14
Copyright ⓒ 2012 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only

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LG LS5750 Series Specifications

General IconGeneral
BrandLG
ModelLS5750 Series
CategoryLCD TV
LanguageEnglish

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