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Standard Repair Process Detail Technical Manual
symptom
LCD TV
Content
<XXLA8600>
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.
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
Error
C. Audio error_No audio/Normal video
Voltage and speaker checking method
when there is no audio
24 Pin
(Power Board ↔ Main Board)
1
Power on
3
3.5V
5
3.5V
②
7
GND
9
24V
11
GND
13
12V
15
12V
17
GND
19
GND
21
GND
23 L/DIM0_MOSI 24 L/DIM0_SCLK
①
2
INV ON
4
PDIM#1
6
PDIM#2
8
GND
10
24V
12
GND
14
12V
16
24V
18
GND
20
GND
22
L/DIM0_V8
③
A21
Established
2013.01.31
date
Revised
date
A21
LGE Internal Use Only
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