LG 55X6500-TD Service Manual page 107

Standard Repair Process Detail Technical Manual
symptom
LCD TV
Content
<ALL MODELS>
Edge LED 42/47"
Checking order when there is no audio
① Check the contact condition of 20V 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.
③-0 : LX65 & 95, ③-1 & ③-2 : Only LX95
***
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Only for training and service purposes
Error
C. Audio error_No audio/Normal video
Voltage and speaker checking method
when there is no audio
1
②
3
5
7
9
11
13
15
17
19
21
23
Pin layout (24P)
24V
Power (IOP & Edge 55")
2
on
20V (
Edge 42/47
24V 4 24V
GND 6 GND
GND 8 GND
3.5V 10 3.5V
3.5V 12 3.5V
GND 14 GND
GND 16 NC
12V 18 Inverter ON
LE : NC
12V 20
IOP : PWM Dim #1
LE : PWM Dim #1
12V 22
IOP : NC
NC 24 Error-out
A25
Established
date
Revised
date
③-2
)
③-1
③
A25
①
LGE Internal Use Only