Read LG 32LW5700-SA (CHASSIS:LJ12C) Service Manual online
ⓒ LG Electronics. Inc.2009
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.
GND and output terminal, the speaker is normal.
Standard Repair Process Detail Technical Manual
Voltage and speaker checking method
when there is no audio
when there is no audio
C. Audio error_No audio/Normal video
<ALL MODELS>
A25
Established
date
Revised
date
Error
symptom
Content
LCD TV
A25
①
②
③
SMAW200-H24S (YEONHO)
Error-out
24
N.C
• Lamp SCANNING
Model
Model
: PWM Dim #2
23
PWM Dim #1
22
12V
21
Lamp : A-Dim
LED : N.C
20
12V
19
Inverter On/off
18
12V
17
GND
16
GND
15
GND
14
GND
13
3.5V
12
3.5V
11
3.5V
10
3.5V
9
GND
8
GND
7
GND
6
GND
5
20V (24V)
4
20V (24V)
3
20V (24V)
2
Power on
1
24 Pin
(Power Board ↔ Main Board) -
공통
②
2010. 12 .14
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