Checking order when there is no audio
Check the contact condition of or 24V connector of Main Board
Measure the 24V input voltage supplied from Power Board
(If there is no input voltage, remove and check the connector)
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
<84LM96>
A25-3
Established
date
Revised
date
Error
symptom
Content
LCD TV
A25
2012. 08 .30
SLAVE PSU
24 Pin (Power Board ↔ Main Board)
1Power on 224V
324V 424V
5GND 6GND
7GND 8GND
93.5V 10 3.5V
11 3.5V 12 3.5V
13 GND 14 GND
15 GND 16 GND
17 12V 18 Inverter On/off
19 12V 20 A-DIM
21 12V 22 P-DIM
23 GND 24 Error-out
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