LG OLED55B6 Series Service Manual page 73

Standard Repair Process Detail Technical Manual
symptom
Content
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.
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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
②
Established
date
Revised
date
A12
A12
①
③
1 SPK_R-_FT 2 SPK_R+_FT
3 SPK_L-_FT 4 SPK_L+_FT
5 SPK_R-_TW 6 SPK_R+_TW
7 SPK_L-_TW 8 SPK_L+_TW
LGE Internal Use Only