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Only for training and service purposes LGE Internal Use Only
24 Pin (Power Board ↔ Main Board)
SMAW200-H24S
1 Power on 2 Inverter On/off
3 3.5V 4 PWM Dim #1
5 3.5V 6 PWM Dim #2
7 GND 8 GND
9 24V 10 24V
11 GND 12 GND
13 12V 14 12V
15 12V 16 24V
17 GND 18 GND
19 GND 20 GND
21 GND 22 L/DIMO_VS
23 L/DIM0_MOSI 24 L/DIM0_SCLK
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
Established
date
Revised
date
Error
symptom
Content

LCD TV

②

2012. 12 .06
②

①

③