LG 65LA965V Service Manual page 121

Standard Repair Process Detail Technical Manual
symptom
LCD TV
Content
<XXLA965V-ZA>
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 © 2013 LG Electronics. Inc. All rights 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
24 Pin (Power Board ↔ Main Board)
1 Power on
3 3.5V
5 3.5V
②
7 GND
9 24V
11 GND
13 12V
15 12V
17 GND
①
2 INV ON
4 PDIM#1
6 PDIM#2
8 GND
10 24V
12 GND
14 12V
16 24V
18 GND
③
A21
Established
2013.01.31
date
Revised
date
A21
LGE Internal Use Only