LG OLED55C8PUA Service Manual page 62

Standard Repair Process Detail Technical Manual
symptom
Content
P201
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.
Error
C. Audio error_No audio/Normal video
Voltage and speaker checking method
when there is no audio
②
Established
date
Revised
date
①
C8 Series
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
A12
E8 Series
1 SPK_R-_FT 2
3 SPK_L-_FT 4
5 SPK_R-_CT 6
7 SPK_L-_CT 8
9 SPK_R-_TW 10
11 SPK_L-_TW 12
Copyright © 2018 LG Electronics Inc. All rights reserved.
Only for training and service purposes.A
A12
SPK_R+_FT
SPK_L+_FT
SPK_R+_CT
SPK_L+_CT
SPK_R+_TW
SPK_L+_TW