Read LG 32LN5100 (CHASSIS:LL35B) Service Manual online
Standard Repair Process Detail Technical Manual
Voltage and speaker checking method
when there is no audio
C. Audio error_No audio/Normal video
A16
Established
date
Revised
date
Error
symptom
Content
LCD TV
2013. 02. 15.
when there is no audio
<ALL MODELS>
date
②
Check the DC 24V, 12V,
3.5V.
3.5V.
18 Pin
(Power Board ↔ Main Board) -
공통
②
1
Power on
2
DRV ON
3
3.5V
4
PDIM#1
①
②
5
3.5V
6
PDIM#2
7
GND
8
GND
9
24V
10
24V
③
11
GND
12
GND
13
12V
14
12V
15
12V
16
N.C
17
GND
18
GND
Checking order when there is no audio
17
GND
18
GND
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)
35 / 37
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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