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Guest reut_virgil

Multimetru digital defect

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Guest reut_virgil

Buna ziua Daca sunteti amabili:am un aparat de masura V&A Instrument pe nume:VA18B.Fara sa-l fi bruscat electric sau mecanic,pe scala Ohmi,in gol imi arata o valoare limitata(~4Ko)iar la punere in scurt imi idica intr-adevar 000.In acelasi timp nici scala pt capacitate nu functioneaza.Celelalte scale functioneaza in parametrii.Daca aveti idee despre ce ar putea fi vorba va rog sa-mi dati un sfat. Multumesc!

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".....Fara sa-l fi bruscat electric sau mecanic....." - ciudat defect.L-ai deschis, sa vezi ce e pe acolo?Ai niste varistori si PTC-uri pe protectii, masoara-i.Verifica atent cablajul, sa nu aiba vreo urma de arsura pe undeva, care sa creeza o rezistenta pe intrare.

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Guest reut_virgil

Am o sursa de 3,4v,un AO dual de precizie si CI principal ascuns in rasina epoxidica.Cel mai probabil(presupun)este o problema de circuit imprimat(in special trecerile).Am sa-l bumbacesc mai serios saptamana viitoar si va transmit ce-am rezolvat.Multumesc!

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Salut baieti, Am si eu un aparat de masura defect si-i caut schema electrica. Nu am deschis alt subiect deoarece am considerat ca aici se potriveste si in cazul meu: "Multimetru digital defect". Cipul de baza este un SAMSUNG C229B si Google nu-mi da nimic despre acest cip. Poate ca are cineva o schema sau ceva asemanator despre acest aparat de masura sau poate o schema similara cu acest cip Samsung. Multumesc anticipat.P.S. pun si niste poze poate sunt de ajutor.

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