hace 5 años
friends, I'm repairing a 32-inch sony trinitron tv which I checked and got a burnt horizontal transistor I replaced it with another one that I got in my stock .. I gave it to turn on and it didn't turn on I proceeded my measurements and everything was perfect but I noticed that on the plate no There were only input voltages 5 volts were present I decided to jump to the plate of the source that is separated .. the serial of the board is TCI-A7I I proceeded to measure there were no voltages of 9volt output nor those of B + only left the source of the 5 volts that were present on the main board .. in the measurements I got the resistor R607 molten fusistor had no measurement to replace it and re-melted by logic disassemble the MX-0841 dual transistor proceeded to measure it and all its pins were in Shortly I proceeded to buy it and I did not get anywhere it is sold out .. investigating a little I got a possible solution that was to place 2 transistors C4834 but I also did not get them down their data sheets and verify that in m i stock i have 4 transistors 2 transistors D13007K and 2 transistors P-13009-0. Download the data sheet and they look like the transistor that should be taken that is the MX-0841. Well, I decided to place the D13007K first, putting its adaptation base collector and emitter as it should take the MX-0841, I check everything before connecting, I proceed ... connect the voltage source and stable output 138.5 volt in the source and the 9 volt now if the voltages came out .. I decided to connect the source to the main board and the TV turned on when I gave the order I left about 10 minutes on and the TV was normal I proceeded to touch the transistors and they were cold they did not touch or warm I proceeded to I touched the horizontal transistor and it was hot a little more than normal I think in 10 minutes I felt it was hot .. I decided to turn off the TV and when I turned it on again a D13007k exploded taking with it a polyester condenser with the numbering 684 the 2 exploded the fusistor resistor did not melt the horizontal transistor either .. I would like you to help me see what I am wrong with or what possible solution we can give before placing the last 2 transistor is that I have left that are the P-13009-O that according to their data sheet are 12 amps and I need to know please what capacitor I can put since in all my stock I don't get that number I don't have much knowledge in those capacitors
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