LG 28LM4 0B-PU Series Service Manual page 60

Standard Repair Process Detail Technical Manual
Error
symptom
Content
② ②
Checking order when there is no audio
1.Check the contact condition of or 12V connector of Main Board
2.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.
C. Audio error_No audio/Normal video
Voltage and speaker checking method
when there is no audio when there is no audio
<28 > <28">
A20
Established
date
Revised
date date
②
1
2 2
3
4
- 60 -
A20
① ①
SPK_R+FT
SPK_R FT SPK R-FT
SPK_L-FT
SPK_L+FT