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Crumbtrail TV Forums: TV Equipment: TV Repair Forum:
LG 42LC2R Static on sound then no sound

 

 


dcia0015
New User

Aug 3, 2018, 1:00 PM

Post #1 of 2 (144 views)
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LG 42LC2R Static on sound then no sound Can't Post

The problem is as described above, after analyzing the problem I found that the integrating coils at the audio output are getting very hot. Furthermore I noticed a high frequency (400kHz) superimposed on the signal at the output (speaker terminals). The amplitude of this signal is around 16% that of the signal when tried with a 1kHz tone.

Anyone can help?

Thanks in advance



dcia0015
New User

Aug 3, 2018, 2:23 PM

Post #2 of 2 (138 views)
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Re: [dcia0015] LG 42LC2R Static on sound then no sound [In reply to] Can't Post

In the mean time I checked the +19V supply and there was no ripple and replaced two capacitors 0.47uF at output. The fault took longer to occur.


I hope that someone might give a hint.

Thanks

 
 
 


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