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Tube TVs
Tv Burn the Horizontal transistor
383
hace 5 años
hace 5 años
Good. I have in the workshop a Daewoo brand TV assembled in Korea Model: DTA-21BRA. the tv reaches the normal 125vdc, but when giving power to the seconds heats and burns the horizontal transistor, I have placed a test lamp disconnecting the collector of the transistor and the lamp turns on well and the voltage drops to 95vdc and remains stable, but remains stable, but I've already burned three transistors. I need help to solve. Free
2.308
hace 5 años
hace 5 años
suggestions. you remove the horizontal output transistor and place the focus of the bmas to ground. this so that the source has a charge. Place your frequency meter in the base of the hot and check how much you have of oscillation are 15750 cycles. If it's ok, we'll have to try the flyback. comment. greetings everyone. Felipe ascencio
30.814
hace 5 años
hace 5 años
Hello Friend. If you have bad flayback because it doesn't last long for the tsh to burn. Cheers
135
hace 5 años
hace 5 años
Hi there are two things. it could be that your flyback is bad or the transistors you are putting are of poor quality you have to look for originals. In the market there are many Chinese components of poor quality that do not last even seconds. check the electrolytic filters too. regards
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