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LN46C650 and Audio Out Problem

by jeremyleo / November 23, 2010 4:03 AM PST

Hi. I recently purchased a Samsung LN46C650 and love the TV - great picture and very cool options. My dilema has to do with the audio out not working properly.

I use my home theatre reciever for all audio (an older JVC model). My HT reciever does not have HDMI inputs or Optical inputs, so in order to get sound from the TV through my HT reciever when using PC Share, Internet or even USB sticks, I need to use the 1/8 audio out jack on the back of the TV. I have the right cable (1/8 stereo to L and R RCA), however when I plug in the right channel to my HR reciever, I get a low range hum (even engages my subwoofer) that I cannot make go away, Doesn't matter which side I plug in to the right channel (L or R), I get the hum. It also doesn't matter what input I select on my HT reciever (TV in, VCR in, Aux in), I get the same hum when plugging into the right channel.

I have tried a brand new cable - same results. I have tried plugging the TV into another audio source (old boom box) and the hum is not there. I have numerous other audio devices coming through this reciever with no issues (DVD, Sattelite box, CD player). The hum only happens when I plug in the TV.

I realize that this is a very specific issue - any thoughts? We would like to avoid using the TV speakers as the sound is really not great.

Thanks in advance.


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by jeremyleo / November 23, 2010 4:08 AM PST

One more thing - perhaps worth noting - the hum changes in volume when I change volume on teh HT reciever - so I cannot drown it out simply by adjusting the volume. And the hum is all that comes through the right side - not a combination of hum and source audio.

Again, thanks.

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LN46C650 and Audio Out Problem
by Samsung_HD_Tech Samsung staff / November 23, 2010 5:14 PM PST


It almost sounds like the audio port somewhere isn't properly grounded. I'm assuming you've set the audio speakers to "External Speakers"? It may be something as simple as the 3.5mm-to-RCA connector, but other than that, have you tested the same output with a regular pair of speakers (like computer speakers) to see if the issue is coming from the TV?

Keep me posted.


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