LG 65UH8500 - Voltage and Speaker Checking Method 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)
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
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
24V
2
24V
3
24V
4
24V
5
GND
6
GND
7
12V
8
12V
9
GND
10
GND
11
GND
12
GND
13
PWR-On
14
P-DIM2
15
GND
16
12V
17
12V
18
12V
19
24V
20
24V
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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