Standard Repair Process Detail Technical Manual
Voltage and speaker checking method
when there is no audio
C. Audio error_No audio/Normal video
A12
Established
date
Revised
date
Error
symptom
Content
A12
②
Checking order when there is no audio
① Check the contact condition of or 20V connector of Main Board
② Measure the 20V 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.
1 SPK_R-_FT 2 SPK_R+_FT
3 SPK_L-_FT 4 SPK_L+_FT
5 SPK_R-_CT 6 SPK_R+_CT
7 SPK_L-_CT 8 SPK_L+_CT
①
P201
Copyright © 2019 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
To Next Page
Loading...
