Question about Projection Televisions

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HORIZONTAL OUTPUT OVERHEATING, HIGH PITCH SCREEL. BLOWING THE H.O.T.

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  • Billdepoo Aug 26, 2008

    Samsung Model HLN506W serial # 37193CEX200180M overheats and shuts off, I cleaned inside, it seemed to help somee

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Whats the model number of your set and I will assist you with the problem, please respond to this same post with your model number.

Posted on Aug 14, 2008

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My tv makes 3 even high pitched squeals when i turn it on. about 1 second each, then powers off. No picture no sound. All imputs. What do you have for suggestions on what it could be.


One of most two common reason why your set will not come on, is because it has lost the high voltage, the first thing to check is your horizontal output transistor, to see if it is shorted, it will be located bay the flyback, mounted on a metal heat sink. That is what is causing a squealing noise.

Oct 16, 2010 | RCA HD52W56 52" Rear Projection HDTV

1 Answer

What Is There To Ask About A Hori Output Tramsistor?? It Needs To Be Replaced I Guess??


The horizontal output can be open and the set wont have High voltage or it can short which will usually blow a fuse. The transistors cost about 10.00 - 12.00 for quality Horizontal output transistors.

Dec 05, 2009 | Projection Televisions

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D52W20 sooner or later baby I WILL watch a ball game


TL010 is more likely. Its a 2SC5588 Transistor Horizontal Output.

Nov 26, 2009 | RCA D52W20 52" Rear Projection HDTV-Ready...

1 Answer

High pitched sound


The high-pitched squeal is from the power supply, usually because of failure of the horizontal output transistor, flyback transformer, or both. Without a specific model I can't give more definite information about part numbers or likely costs. But repairs of this type usually have parts costs in the 10 to 75 dollar range (depending on just which parts are bad, and where replacements come from) plus whatever labor costs the repairer charges.

Nov 13, 2008 | Projection Televisions

1 Answer

When turn on no picture and there is a high pitch buzz or frying. Then after a minute or two it will shut off by itself. Before thid happened the picture would come on slowly with a frying sound and then...


my first instinct in this is flyback transformer. or if it is three tube projector could be a high voltage splitter lines in picture sound like what is called retrace lines ... this is another indication of a possible bad flyback. high pitch sound is another sypmpton of a high voltage flyback transformer problem. WARNING televisions generate potental lethal charge. the device called flyback is used to generate several THOSAND volts. so be carefull if you take the back of any television. along with the flyback the horizontal output transistor possible could have failed. What type of tv is it? model

Oct 01, 2008 | Projection Televisions

2 Answers

AKAI PT5250A


you need a flyback.

Aug 15, 2008 | Akai PT5250A Television

1 Answer

GE D52gw12


The set is shutting down to prevent further damage. There is a problem with the high voltage circuit. The most common failure part is the horizontal output transistor. Figure on $20 or so for parts plus the local labor rate to get the total repair cost.

Dan

May 30, 2008 | GE Projection Televisions

2 Answers

Samsung PCL542R Chirping noise


There is problem in sound IC. First check it

Feb 17, 2008 | Samsung PCL5415RB 54" Rear Projection...

1 Answer

High pitch noise..from TV


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.

Feb 28, 2007 | RCA P46924 46" Rear Projection Television

1 Answer

Piercing sound


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.

Feb 26, 2007 | RCA D52W20 52" Rear Projection HDTV-Ready...

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