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Defect Progress70.18ge


Jhn

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Salut !,

 

As dorii un sfat,din partea celor cu experienta in legatura cu acest invertor defect.

 

Schema electrica echivalenta CYCLE 60.20GE sasiu EPI5002 :http://i61.tinypic.com/2u8dixx.jpg

Pe langa componentele banale care le-am gasit defecte,si se ard deobicei: rezistorul 22 ohmi/7W,diodele zener, diodele BYV26,rezistorii din driver,si cateva bucati  IRFP450 dupa inlocuirea acestora,si eliminarea din circuit a tranzistorilor IRFP450,am masurat semnalul in grila axcestora,si observ un varf de tensiune pe care nu stiu cum sa-l elimin.

Am pus de proba doi tranzistorii,si binanteles ca la pornire s-au facut "popcorn",iata semnlele in grila celor doua ramuri :

                         G-S (AB):http://i57.tinypic.com/2dl3wqp.jpg

                     

                         G-S (CD):http://i57.tinypic.com/igbxc3.jpg

           

 Si "popcornul" in partea dreapta,in stanga sunt tr.originali care au scapat :http://i59.tinypic.com/2wrgq37.jpg

 

Maine o sa-mi fac timp,si o sa-l i-au la "cernut",o sa verific si snuberele, totusi orice sfat e binevenit !

 

Cu stima !

                         

 

                                     

 

     

   

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