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ELFORUM - Forumul electronistilor

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Aceasta sursa lucreaza pe frecventa de linii.Tensiunile in regim normal de functionare ale STR 50103 sint; pin1=masa 2=102v 3=296v 4=U1 stby=86v pw=103v.Daca C815-1mf/160v(250v) este sub valoare-uscat-vezi reactia pin 8-10 trafo linii(atentie la;R805-22 ohmi/2w,R806-36 ohmi/2w ,D808 defecte,verifica) ,tens U1 scade vertiginos fiindca nu asigura consumul(imaginea este intoarsa sus,defocalizata,ingustata pe BO si sursa tiuie).Startul se realizeaza din bara de 300v prin rez.R803-560k,R804-620 ohmi/3w ptr. pin2.Schimba C-urile de 100mf/160v+10mf/160 de pe bara U1. Deasemeni dupa remedierea sursei si probata cu becul 220v/60w(cu tranz final linii dat afara) ,se inlocuieste obligatoriu C424-22/33mf/160v(250v) din pin4 al trafo linii si verifica eventualele scurturi de pe tens .recuperate ale trafo(barile;16v5,24v,180v).Succes.

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