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chipi

bas distorsionat la combina audio Panasonic PM15

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detin un sistem audio Panasonic PM15 la care numai frecventele joase se aud urat pe ambele canale ,de parca membranele difuzoarelor ar fi sparte.La inceput am crezut ca sunt difuzoarele de vina dar le-am probat pe un alt amplificator si sunt ok.Precizez ca sistemul are amplificare separata pt joase (final LA4705N) si inalte(final AN7135),inaltele se aud clar..care sa fie cauza?

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Verificati daca tensiunile de alimentare sunt corecte in sarcina.

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Verificati daca tensiunile de alimentare sunt corecte in sarcina.

 

 

am verificat tensiunea de alimentare si e in regula

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ce poate sa aiba ca nu-i dau de capat,am schimbat si condensatorii de pe partea de semnal

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Ce tensiuni sunt pe pinii , 12,14,15 si 17si la ce tensiune este alimentat LA4705N?

Edited by miron1947

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Ce tensiuni sunt pe pinii , 12,14,15 si 17si la ce tensiune este alimentat LA4705N?

 

 

 

am masurat tensiunea si pe fiecare pin mentionat sus am 6,4Vcc,integratul e alimentat la 15Vcc...da se pare ca trebuie schimbat integratul

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