LG Electronics 32LA62**-Z* Standard Repair Process Detail Technical Manual, All Models

Standard Repair Process Detail Technical Manual

	Error	C. Audio error_No audio/Normal video	Established	2012. 12 .06
LCD TV	symptom		date
	Content	Voltage and speaker checking method	Revised		A25
		when there is no audio	date

<ALL MODELS>

②

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	②	GND	8	GND
		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

①

③

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)

③Connect 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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