My tv has been functioning fine up until a couple of days ago. While watching it, the sound immediately went to static, only every channel went "staticy", except for channels 4 and 25. I have cable, so all the other 63 channels have a fuzzy sound. I went to the other 2 televisions I have in the other rooms, and they were fine. So I took one of them in the livingroom (where my "problem" tv was), and disconnected the cable/antannae, hooked it up to the other television, it worked fine. So I returned the connection back to the "problem" tv, and turned on my DVD player, and pressed play. The audio came out just fine. So what could possibly be the problem? I have excellent sound quality on channels 4, 25 and when I have my DVD, VCR or Sony Playstation hooked up. But not on any of my television stations, and it all happened suddenly without ever touching anything, and just all of the sudden. Please help me!!!
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Re: strange audio problems
That unit is a ctc203 chassis with an LA7612N for an audio IC for an amp. That and possibly a couple caps need to be tested/replaced to get your TV back up and running without the static sound in the audio.
It's a simple repair for a shop and not too expensive.
I would suggest taking the unit into the shop yourself to save a few bucks. And if you're not sure where to begin your research for a reputable shop might I suggest NESDA at:
which should help with finding a good tech in your area...
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DVD drive section circuit fault. If you wish to get some details; check the site linked here. Viewing it in "Mosaic" or "Magazine" will make surf easy. Pull up older posts. Surf the site with patience. Do a search by type in the brand name of your device at its search box. http://electronicshelponline.blogspot.com/
Your problem is somewhere between the tuner and video detector circuit.
The signal entering your TV carries: video,red color,and blue color as well as sychronizing pulses for color and horizontal and vertical deflection ( actually vertical sync. is derived from horizontal sync.) along with burst pulses to synchronize the color. After all these, the sound is an fm signal entwined with a pilot signal for stereo audio. WHAT a mess!
After the audio passes through all this, it is detected and sent to the audio processor.
If any frequency has drifted away from it's value then you loose the sound.
SO... your problem could be in any of the tuned circuits or in the audio processor IC (chip). Any component changing value could creat this problem. Most likely the audio processor IC. You'd need to have the set checked out by a tech to find your problem.
Probaby the stereo decoder IC went bad or a supply voltage to it is too low or noisy. If it has audio output jacks on the back of the TV, connect it to an external amplifier and see what that sounds like. If it is ok in stereo or mono mode then the amplifier in the TV is bad. This will prove that the stereo decoder is ok.