LG 55UF6790 Service Manual page 72
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Also See for 55UF6790:
- Owner's manual (65 pages) ,
- Easy setup manual (37 pages) ,
- Easy setup manual (37 pages)
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Standard Repair Process
Error
LCD TV
symptom
No audio
Screen normal
Copyright
2015 LG Electronics Inc. All rights reserved.
Only for training and service purposes
C. Audio error
No audio/ Normal video
☞A20
Check user
menu >
Off
Speaker off
Y
Cancel OFF
Check
Speaker
disconnection
☞A21+A18
Check audio B+
N
24V of Power
Board
Replace Power Board and repair parts
N
Disconnection
Y
Replace Speaker
8
Established
2015.5.25
date
Revised date
Y
Normal
voltage
N
Replace MAIN Board
End
8/16
LGE Internal Use Only
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