LG 50UH5500 Service Manual page 117

Standard Repair Process Detail Technical Manual
Error
symptom
Content
<50/65UH5500-UA>
Checking order when there is no audio
1.Check the contact condition of or 13V connector of Main Board
2. Measure the 13V 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.
C. Audio error_No audio/Normal video
Voltage and speaker checking method
when there is no audio
50UH5500-UA
②
②
65UH5500-UA
Established
date
Revised
date
①
③
1
2
3
4
A21
A21
SPK_R-
SPK_R+
SPK_L-
SPK_L+