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ELFORUM - Forumul electronistilor

Schema pentru µ-Dimension µ-Pro 7.2x

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Va salut,


Am la reparat un amplificator auto de tipul ?-Dimension ?-Pro 7.2x.

Cand l-am alimentat prima data, se aprindea ledul "Prot" de pe panoul frontal si de asemenea avea alimentare la TL494 cu care e facuta sursa ridicatoare. De asemenea, am gasit finalii sursei busiti.


Am schimbat finalii si am incercat sa o pornesc, dar nu mai primeste alimentare la TL494. Inainte erau pulsuri pe portile mosurilor (cand erau arsi), dar acum nu mai pleaca nimic din controler pentru ca nu mai are alimentare.


Am impresia ca 494 e alimentat printr-un circuit auxiliar, nu e conectat direct la 12V. Inainte sa ma apuc sa fac eu releveul, as vrea sa va intreb daca are cineva schema sau daca aveti ceva de la ?-Dimension, in speranta ca schemele se aseamana. Ma intereseaza cum au abordat alimentarea lui 494.




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