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Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only
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.
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>
A16
Established
date
Revised
date
Error
symptom
Content
LCD TV
①
②
③
②
Check the DC 24V, 12V,
3.5V.
18 Pin (Power Board ↔ Main Board) - 공통
1
Power on
2
DRV ON
3
3.5V
4
PDIM#1
5
3.5V
6
PDIM#2
7
GND
8
GND
9
24V
10
24V
11
GND
12
GND
13 12V 14 12V
15 12V 16
N.C
17
GND
18
GND
2013. 01 .09
①
③