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.
Standard Repair Process Detail Technical Manual
Voltage and speaker checking method
when there is no audio
C. Audio error_No audio/Normal video
<ALL MODELS>
A25-1
Established
date
Revised
date
Error
symptom
Content
LCD TV
A25
①
②
③
②
2011. 12 .14
ALEF LED
24 Pin
(Power Board ↔ Main Board)
1
Power on
2
24V
3
24V
4
24V
5
GND
6
GND
7
GND
8
GND
9
3.5V
10
3.5V
11
3.5V
12
3.5V
13
GND
14
GND
15
GND
16
V-sync
17
12V
18 Inverter On/off
19
12V
20
N.C
21
12V
22 PWM Dim #1
23 PWM Dim #2 24
Error-out
Edge LED
Copyright © 2012 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only
Содержание 84LM96/W
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Страница 89: ... Introductions of soft touch Introductions of 12Y Model Soft touch Ass y ...
Страница 94: ...Introductions of 12Y RF ass y Magic Remote control Introductions of 12Y RF ass y Magic Remote control ...
Страница 101: ...WIFI Built in ass y feature LGIT WIFI built in feature PIN USB interface 1 5V 2 DM 3 DP 4 GND Pin map ...
Страница 102: ...WIFI Built in Block diagram Arcadyan ...
Страница 103: ...WIFI Built in ass y Specification ...
Страница 104: ...표지 12Y Widevine HDCP 2 0 NETFLX Contents 1 Widevine 2 HDCP 2 0 NETFLIX 3 DTCP 4 Changed BOM ...
Страница 108: ...4 Changed BOM As Was Current Æ Add Add Item 1 Marlin Yes No 2 CNTV Yes No 3 HDCP Tx Yes No 4 DTCP Rx Yes No ...
Страница 109: ...4 Changed BOM ...
Страница 147: ...Appendix Exchange PSU LED driver No Light Dim Light Dim Light Dim Light ...