LG 77EG9700 Service Manual page 137

Standard Repair Process Detail Technical Manual
symptom
OLED TV
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
Established
date
Revised
date
①
A21
2014.02.05
③
1 Tweeter_R- 2 Tweeter_R+
3 Tweeter_L- 4 Tweeter_L+
5 Middle_R- 6 Middle_R+
7 Middle_L- 8 Middle_L+
9 Woofer_R- 10 Woofer_R+
11 Woofer_L- 12 Woofer_L+
LGE Internal Use Only
A21