LG 55UH950V-ZA - Checking Order When There Is no Audio

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
Standard Repair Process Detail Technical Manual
Voltage and speaker checking method
when there is no audio
C. Audio error_No audio/Normal video
A21
Established
date
Revised
date
Error
symptom
Content
A21
①
②
③
<55/65UH95>
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
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
17
18V
18
18V
19
18V
20
18V
21
GND
22
GND
23
DRV-ON
24
P-DIM1
25
GND
26
SCLK
27
VSINC
28
SIN
Main B/D Side
Pin map reversed
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