LG OLED55C6P Service Manual page 122

Standard Repair Process Detail Technical Manual
symptom
OLED TV
Content
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.
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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
24Pin(Power Board ↔ Main Board)
②
②
1 GND 2
3 24V 4
5 24V 6
7 GND 8 12V_ON
9 12V 10
11 12V 12
13 12V 14
15 GND 16
17 3.5V 18
19 3.5V 20
21 PDIM#1 22 PDIM#2
23 PWR ON 24 INV CTL
A12
Established
date
Revised
date
GND
24V ①
24V
GND
12V
③
12V
GND
3.5V
GND
1 SPK_R-_FT
3 SPK_L-_FT
5 SPK_R-_CT
7 SPK_L-_CT
A12
2 SPK_R+_FT
4 SPK_L+_FT
6 SPK_R+_CT
8 SPK_L+_CT
LGE Internal Use Only