LG 65EF9500 Service Manual page 100

Standard Repair Process Detail Technical Manual
symptom
LCD 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
1 PWR ON 2 INV CTL
3 DPC 4 PDIM#2
5 3.5V 6
7 3.5V 8
9 GND 10
11 12V 12
13 12V 14
15 12V 16
17 GND 18 12V_ON
19 24V 20
21 24V 22
23 GND 24
A12
Established
2014.12.31
date
Revised
date
①
GND
3.5V
GND
12V
12V
GND
③
24V
24V
GND
1 SPK_R-
3 SPK_L-
A21
1 SPK_R+
4 SPK_L+
LGE Internal Use Only