TV RECCO RTV-21A31 Burns in the source transistor
Televisor Recco RTV-21A31
Televisor Recco RTV-21A31
Hello Friend. and check if pin 8 of the eprom has 5volt. And you tried if the tv. Turn on by desoldering the ic. vertical
Good evening ... Chassis diagram that says, I at least do not get it, I didn't find it on the WEB, if you have it please share it. Does the numbering of the components imply that they are in several stages? Starting with the resistance of 400 Ohms (R151) confirm if so the position number of the same. (400 Ohms is not a commercial value) Are the capacitors mentioned in these figures in their bodies?
I did not measure the eprom because the TV just plugged in and the fuse blows. and the power transistor is short.
The diagram you download is not the nomenclature of R151 which I assume is not for this model. I take it as a reference since it looks a lot. I will upload it so that you can understand the resemblance or in case any case has not been able to locate the resistance.
Good. Unfortunately, these days work with the method that I use, it is no longer possible, due to the ridiculous idea of prohibiting the use of incandescent lamps, which is the purpose of my words, is that you can not work with a source that gives that kind of problem, without putting a device that dampens the short or that is causing the destruction of the power transistor and the fuse.
I understand what you mean, it is with a light bulb, I use that method when the horizontal transistor is put in short I put the light bulb in series by selecting the size of the TV and the watt of the bulb so that it consumes the excess that the transistor does horizontal end up opening. Tell me you can use that same method with the source transient, connected the collector the light bulb and the choper. Please tell me I will be waiting for your response. I have never tried it that way.
http://www.archivotecnicosaurios.com/descargas/tv/seccion_ordenada/12610_Chassis_Universal_El-Especialista-Sanyo.pdf
This is the diagram with which I am leading.
good evening colleagues, I tell you that I managed to solve the defect of this TV by replacing all the components of the source capacitors resistors diodes crystal zener filter included of course the two source transistors the driver and the power transistor. And the source started. Thanks a lot...
I understand thanks, I will try this time replacing the fuse to see what result I have.
I inform you my progress I am looking for a transistor to replace the one that is short.
a query. If I replace a power transistor with a transistor that has damper, can it work? ....
I do not think so; Usually I found these chassis with this transisror 2SC4460 / 2SC5299 / among others. Check the rectifier bridge diodes, check the main capacitor ... If I buy the transistor in a spare house, unless it has nothing else out of place at the source, it is possible that what you have bought are counterfeit.
Hello, how much is the focus that you put in the fuse, here we use one of 200W in series and the input line, if that value turns on strong you have something cut, the ptc you have disconnected, you have to do that test and take voltage of + B to see if it is inside what circuit asks