Checking order when there is no audio
①
Check the contact condition of or 13V connector of Main Board
②
Measure the 13V 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
A13
Established
date
Revised
date
Error
symptom
Content
A14
[All models]
< Main Ass’y>
Monitor Signage
12 Pin
(Power Board ↔ Main Board)
SMAW200-H12S5K(BK)
1
PWR-On
2
PWM#2
3
GND
4
D 13.2 V
5
D 13.2 V
6
D 13.2 V
7
A 13.2 V
8
A 13.2 V
9
GND
10
GND
11
DRV-On
(Inverter –On)
12
PWM#1
①
Copyright
ⓒ
2018 LG Electronics Inc. All rights reserved.
Only training and service purposes.
Summary of Contents for 43SM5KE
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