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Electrolux EWM1100 - tensiune zener?

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Va salut.

Am primut la reparat o placa EWM1100 care desigur nu se alimenta. LNK304 defect, resistenta de 47R intrerupta. Le-am inlocuit si s-au ars ambele din nou.

Masurand pe cablaj, am descoperit o dioda zener mini-melf din circuitul de feedback (DZ1 din baza tranzistorului Q5) care are 132R in ambele sensuri. Problema e ca nu stiu la ce tensiune e. Poate stie cineva pe aici ce fel de zener trebuie acolo. Am incercat cu o dioda normala si placa nu porneste. Scoate vreo 5.8V in loc de 12.

Atasat o poza cu schema si un link catre un articol in rusa.




Edited by YO5VAE
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Nu stiu ce sa zic. Posibil, dar schema e putin diferita pe feed-back si nu se vad nici valorile componentelor.

Multumesc oricum. Poate mai e cineva pe aici care s-a dat de problema.

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