LG 42LV3500 Service Manual page 98

Standard Repair Process Detail Technical Manual
symptom
LCD TV
Content
<ALL MODELS>
Edge LED PSU without LED Driver
Checking order when there is no audio
① Check the contact condition of 20V 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 © 2011 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
②
Established
date
Revised
date
A25
2011. 2 .07
A25
①
③
LGE Internal Use Only