LG OLED55C6P

Standard Repair Process Detail Technical Manual
Voltage and speaker checking method
when there is no audio
C. Audio error_No audio/Normal video
A12
Established
date
Revised
date
Error
symptom
Content
A12
②
24Pin(Power Board ↔ Main Board)
1
GND
2
GND
3
24V
4
24V
5
24V
6
24V
7
GND
8
12V_ON
9
12V
10
GND
11
12V
12
12V
13
12V
14
12V
15
GND
16
GND
17
3.5V
18
3.5V
19
3.5V
20
GND
21
PDIM#1
22
PDIM#2
23
PWR ON
24
INV CTL
Checking order when there is no audio
① Check the contact condition of or 24V connector of Main Board
② Measure the 24V 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.
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
③
②
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