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Standard Repair Process Detail Technical Manual
symptom
LCD TV
Content
<ALL MODELS>
Checking order when there is no audio
① Check the contact condition of 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.
Copyright ⓒ 2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Error
C. Audio error_No audio/Normal video
Voltage and speaker checking method
when there is no audio
when there is no audio
24 Pin
(Power Board ↔ Main Board) -
1
1
Power on
Power on
3
5
7
②
②
9
11
13
15
17
19
21
23
L/DIM0_MOSI
SMAW200-H24S5
2
2
INV_ON
INV ON
3.5V
4
PDIM #1
3.5V
6
3.5V
GND
8
PDIM #2
24V
10
GND
12
GND
12V
14
12V
16
24V
GND
18
GND
GND
20
GND
GND
22
L/DIM0_VS
24
L/DIM0_SCLK
Established
2013. 11 .30
date
Revised
date
date
공통
①
24V
12V
③
A25
LGE Internal Use Only
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