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
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>
A16
Established
date
Revised
date
Error
symptom
Content
LCD TV
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