Checking Order When There Is No Audio - LG 65UH950V Service Manual

Standard Repair Process Detail Technical Manual
symptom
Content
<55/65UH95>

Checking order when there is no audio

① Check the contact condition of cable or connector
② Measure the 24V input voltage supplied from Power Board
(If there is no input voltage, remove and check the connector)
③ Check the contact condition of cable or connector
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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
1 18V 2 18V
3 18V 4 18V
5 GND 6 GND
7 18V 8 18V
9 GND 10 GND
11 GND 12 GND
13 PWR-On 14 P-DIM2
15 GND 16 18V
Main B/D Side
17 18V 18 18V
Pin map reversed
19 18V 20 18V
21 GND 22 GND
23 DRV-ON 24 P-DIM1
25 GND 26 SCLK
27 VSINC 28 SIN
A21
Established
date
Revised
date
①
③
1 SPK_R-_FT
3 SPK_L-_FT
5 SPK_R-_CT
7 SPK_L-_CT
A21
2 SPK_R+_FT
4 SPK_L+_FT
6 SPK_R+_CT
8 SPK_L+_CT
LGE Internal Use Only