LG 55EC9300 Repair Manual page 75

Standard Repair Process Detail Technical Manual
LCD TV
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
symptom
Voltage and speaker checking method
Content
when there is no audio when there is no audio
Established
Revised
③
②
①
A21
2013.01.31
date
date date
③
A21
LGE Internal Use Only