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TVC Thomson 20 MG10E

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Va salut si La Multi Ani . Am primit acest TVC , nu cunosc sas , cuurmatorul simptom. Porneste ,din telecomanda  se poate schimba canalele + / - volumul + / - SE POATE REGLA , dar dupa un timp apare bara de volum si sonorul scade pana la 0 .Am verificat contactele frontale  -/+pro. si -/+ vol. dar nu sunt blocate si functioneaza . TVC este echipat cu :  alim= BUZ90AF , proc. =TDA9351?PS/N1/1K0180 , mem= MAL22W04 , aud.=TDA7253 , STV8130 , vert.=TDA9302H , final linii=S2055AN , amplif. RGB= TDA6107Q . Se poate posta o schema ? si ce sa mai caut? Cu stima , Virgil .

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butoanele frontale au rezistenta...masurati-le pe scala de 200 mohmi....daca nu dau infinit sunt defecte....la un lcd dadeau cam 100 mohmi...si tv-ul facea ce vroia el...le-am schimbat pe cele cu probleme si totul a fost ok

spor si bafta


catalin nu numai sa aiba rezistenta pe buton poate ele nu da pe multimetru dar ele prind oxid in ele si in timpul functionari fac ravagiu in tv de la condes mai ales la alea care sint prin bucatarie 

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