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Re: rca TV HD52W58
The number you gave for the resistor is incorrect. But I did find a R14705. This resistor is a 1/2W 27K ohm resistor. This part is also in the deflection circuit. This is not a good circuit to play in, and resistor do not burn up by them selfs. There is a problem somewere neir by. The part number for this resistor is 238958.
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Many conditions can cause this...too many to be specific. A short on the circuit board, thermal protection opens when too much heat trips the fuse. A bad power supply, leaking tubes, dirt/dust collection on main board, etc.
Convergence is dead.U know how to solders? Must replaced 2 convergence ICS,and some or all it resistors.Buy a convergence at Websites Tv repair World.com,Tvrepairkits.com to do it ur self.The shop will cost u $300 for parts and labors.
maybe there is a lizard inside, open the back cover then remove the PCB. re solder the damaged area and clean it with an electronic spray cleaner. check for cold solder component leads and re solder it.
One thing that comes to mind is the two main connectors on the power/deflection board. They have ribbon cable in them. If they are white in color. One of them plus the one on the convergence board that is the same size, needs to be replaced. If they are black they are good. Part number is 258686. If your serial number is between G13XXXXXX and G26XXXXXX this is a very good posibility.
My one year old 24" RCA was having the same problem and also changing channels on its own. I decided to do some experimenting. (Warning: High voltages exist inside a TV even when it is unplugged. Messing around inside a TV may be very dangerous and stupid.)
I found that there was a 5 wire ribbon cable that connected the circuit board with the front control buttons to the main circuit board. I discovered that if I turned the TV on, then disconnected that ribbon cable from the main circuit board, the TV was stable, it would not do anything on its own. Obviously, I could not control it either with the ribbon cable disconnected.
Since there did not appear to be any ic chips on the button circuit board, but mainly some resistors, I theorized that the buttons simply caused a certain voltage signal to be returned to the main board. I further theorized that perhaps the voltage being sent to the board was varying causing the return voltage to also varying making the main board thing a control signal had been sent.
The five wires are labled on the small control circuit board. One was labeled "key". (or maybe "keys") I separated and cut that wire. The TV was then stable. It could be controlled by the remote control, but the buttons on the front were now not functional.
I connected some longer wires to the "key" wires and ran them outside to a switch. The TV now works fine with the remote control and is stable and will not do anything on its own. If for some reason I do need to use the manual buttons on the front, I can simply flip the switch on and the buttons will work. However if I leave the switch on the TV will again be unstable, turning itself on and off and changing channels.
Could be burnt tubes or could be something on the optics .. sound like burnt tube.. burnt tube may be but most likey arent coverd in warrenty the tubes are about 250 to replace +labor and there are three. how big aret they quarter or size your hand? if the are small then they would be burnt tubes