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Проблем с декодер и телевизор Panasonic

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(@pamporov)
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Отклонителната е добре, лампата светва, след 3-4 опита. Ето осцилограма на отоплението, горната, под него е на базата.

+В е 146-7 волта. На колектора обаче няма явно изразени импулси. Или ТХО-то или някой кондензатор в колекторната верига е сдал багажа. Така си мисля...


 
Posted : 18.02.2014 18:40
 fbr1
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Като гледам, или нямаш транзистор като свят, или нямаш индуктивност на колектора. При 10 волта размах на базата на тоя транзистор, прехода колектор-емитер трябва да стане жив проводник.


 
Posted : 18.02.2014 18:54
 old4
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Транзистор ментак.


 
Posted : 18.02.2014 19:06
(@pamporov)
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В момента е с J6920 от шаси свалян, от адаша. Освен той да ми е направил постановка, ама не вярвам...


 
Posted : 18.02.2014 19:14
(@reopr-coko)
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В момента е с J6920 от шаси свалян, от адаша. Освен той да ми е направил постановка, ама не вярвам...

Транзистора мисля че е свалян от шаси S63B, защото имам такова в скрапа и транзистора го няма, та този дет е при адаша трябва да е от самсунга


 
Posted : 18.02.2014 19:19
 fbr1
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Абе я сложи едно BU508 за проба през крушка.


 
Posted : 18.02.2014 19:23
(@pamporov)
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Като гледам, или нямаш транзистор като свят, или нямаш индуктивност на колектора. При 10 волта размах на базата на тоя транзистор....

Да ама не. Амплитудата е 1 волт! И мисля че е крайно недостатъчна! Сега ще видя защо е толкоз малка. Трябва да е поне 4-5 волта.


 
Posted : 18.02.2014 19:38
(@zapad)
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а бе да ви разправям, че ще пия пловдивска(кафе и фанта), вие не ми вярвате


 
Posted : 18.02.2014 19:42
(@pamporov)
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Да ама тая осцилограма дето съм я дал по горе е на гейта на драйверния транзистор, и там си е баш толкоз размаха на сигнала. А колко требе да е на базата на мощния?


 
Posted : 18.02.2014 19:54
(@p)
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Вот тебя Альоша Бровкин


Синджира си идва а козата я няма....

 
Posted : 18.02.2014 20:01
 fbr1
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Колкото е захранването на дрейна на драйверния. Запушваш драйверния и мощния трябва да се отпуши на макс.


 
Posted : 18.02.2014 20:07
(@zapad)
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Вот тебя Альоша Бровкин

Да да , ама не


 
Posted : 18.02.2014 20:26
(@p)
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Е те са на EURO-4. Ама японците едва ли са измислили други за EURO-4H
Ето ти ги и като за твоя телевизор


Синджира си идва а козата я няма....

 
Posted : 18.02.2014 20:30
(@pamporov)
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Да, след като са осъзнали че са сбъркали, са пуснали ново сервизно с верните осцилограми:


 
Posted : 18.02.2014 20:35
(@pamporov)
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Колкото е захранването на дрейна на драйверния. Запушваш драйверния и мощния трябва да се отпуши на макс.

12.5-12.6в, смених за всеки случай С509. Няма разлика в амплитудата на базата на Q551


 
Posted : 18.02.2014 20:44
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