LG 65UJ6300 Service Manual page 67

Standard Repair Process Detail Technical Manual
symptom
Content
<ALL MODELS>
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.
Error
C. Audio error_No audio/Normal video
Voltage and speaker checking method
when there is no audio
②
UJ7*
1 VSYNC 2 SIN
3 GND 4 SCLK
5 DRV_ON 6 PDIM1
7 GND 8 GND
9 A13 10 A13
11 D13 12 D13
13 GND 14 D13
15 PWR_ON 16 PDIM2
17 GND 18 GND
UJ6*
1 DRV_ON 2 PDIM1
3 GND 4 GND
5 A13 6 A13
7 D13 8 D13
9 GND 10 D13
11 PWR_ON 12 PDIM2
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Established
date
Revised
date
①
③
1 SPK_R-
2 SPK_R+
3 SPK_L-
4 SPK_L+
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A21