Question about RCA P46924 46" Rear Projection Television

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High pitch noise..from TV

Hello I had an issue a while back with the picture bowing at top and bottom well I fixed that problem. Now everytime I turn on the TV there is an annoying high pitch sound coming from it. Sometimes it will always be there and other times it will fade in and out.....here is what is on the back of tv. service no. = P46924YX5 MODEL = P46924 SERIAL NO = 051441559 CHASSIS NO = PTK195M2A I hope this will help ...what is causing this and how can I fix it.....If info is needed that I didnt provide just let me know I will get it for you..... thanks so much in advance..... erbossman81

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The high pitch squeal you hear is usually caused by a coil vibrating, normally in the horizontal circuit. I've also seen the ferrite bead on the horizontal output transistor do this, but, it is rare. I normally will repair this by finding the coil and "tightening" it. To tighten a coil, technicians use different chemicals, such as, a hot glue gun, rubber silicone or even finger nail polish. I will find the coil that screams by starting with the usual suspects and using a wooden dowel, barely touch the coil and if the pitch of the noise changes, then, thats the coil that needs repaired. If you do not know your way around the inside of a television, I never recommend you do so, since, this procedure must be done with the set turned on and you poke your hands around the inside of the set by the high voltage circuit. Hope this helps your decision.

Posted on Mar 04, 2007

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Posted on Jan 02, 2017

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d

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