LG OLED55B9PUA

Standard Repair Process Detail Technical Manual
Voltage and speaker checking method
when there is no audio
C. Audio error_No audio/Normal video
A14
Established
date
Revised
date
Error
symptom
Content
A14
1.Check the contact condition of or 13.2V connector of Main Board.
2. Measure 20V input voltage for Audio AMP supplied from Power board.
(If there is no input voltage, remove and check the harness)
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.
Checking order when there is no audio
②
①
P201
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
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