Read LG 42LW6500-JA (CHASSIS:LE13E) 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
A25
Established
date
Revised
date
Error
symptom
Content
LCD TV
A25
2011. 01 .18
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.
Edge LED 22/26
<Under 26”>
1
24V
2
24V
3
24V
4
24V
5
24V
6
GND
7
GND
8
GND
9
GND
10
GND
11
NC
12
INV_ON
13
PWM_DIM
14
ERROR_OUT
Pin layout (24P)
Error-out
24
NC
23
LE : PWM Dim #1
IOP : NC
IOP : NC
22
12V
21
LE : NC
IOP : PWM Dim #1
IOP : PWM Dim #1
20
12V
19
Inverter ON
18
12V
17
NC
16
GND
15
GND
14
GND
13
3.5V
12
3.5V
11
3.5V
10
3.5V
9
GND
8
GND
7
GND
6
GND
5
24V
4
24V
3
24V (IOP & Edge
55”)
20V (Edge 42/47)
2
Power
on
1
Pin layout (24P)
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