LG 32LF550U - Voltage and Speaker Checking Method When There Is no Audio

< Main Ass’y>
Checking order
1. Check the contact condition of or 13.2V connector of Main Board
2. Measure the 13.2V 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
A16
Established
date
Revised
date
①
③
12 Pin (Power Board ↔ Main Board)
SMH200-H12S4
1
Power on
2
PDIM#2
3
GND
4
D.13.2V
5
D.13.2V
6
D.13.2V
7
A.13.2V
8
A.13.2V
9
GND
10
GND
11
DRV_ON
12
PDIM#1
②
Error symptom
Content
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