Guest robertimreh Posted July 24, 2013 Share Posted July 24, 2013 Monitor Xerox 19" LCD ( Proview )Nu porneste din butonul de power.Am desfacut circuitele, am schimbat un mosfet 2SK2645 si optocuplor PC817.A mers cam 3 zile , dupa care nu a mai vrut sa porneasca.Ledul de on/off se aprinde aproape imperceptibil intermitent si f f slab.Am verificat toate piesele de pe sursa. Nu par sa mai fie defecte.Atasat schema electrica.Ce ar putea avea? Multumesc anticipat. Link to comment Share on other sites More sharing options...
validae Posted July 24, 2013 Share Posted July 24, 2013 Verifica condensatorii de filtraj din sursa, schimba-i pe toti daca nu ai cum sa verfici ESR-ul.Verifica cu mare atentie toate lipiturile (chiar cu lupa). O simpla lipitura rece poate face figuri urate si poate provoca reaparitia unui defect. Link to comment Share on other sites More sharing options...
Guest robertimreh Posted July 25, 2013 Share Posted July 25, 2013 Schema nu s-a atasat , era prea mare.Sa fie vorba de condensatorul de filtraj de 400 V 100 mF , de langa punte redresaore? Pare in regula , dar cine stie.Lipituri verificate , refacute etc. )Cu siguranta ca experienta mea (foarte scazuta) ar fi prima problema, dar insist sa rezolv pana la urma.Multumesc frumos ptr. raspuns. Link to comment Share on other sites More sharing options...
dan cod Posted July 25, 2013 Share Posted July 25, 2013 Ceva tensiuni ai masurat?altfel cum sa iti dai seama ce este defect.Cat ai pe condul mare?sursa cat scoate? Link to comment Share on other sites More sharing options...
Guest robertimreh Posted July 25, 2013 Share Posted July 25, 2013 Azi voi face si asta . Am scos toate piesele, masurat , ca un incepator ce sunt ). Link to comment Share on other sites More sharing options...
Guest robertimreh Posted July 25, 2013 Share Posted July 25, 2013 Schema LCD Xerox http://monitor.espec.ws/files/changong_ ... 3w_207.pdf Link to comment Share on other sites More sharing options...
Guest robertimreh Posted July 25, 2013 Share Posted July 25, 2013 Va rog mult un site cu piese ok.Multumesc! Link to comment Share on other sites More sharing options...
Guest robertimreh Posted July 25, 2013 Share Posted July 25, 2013 Revin , monitorul a pornit iar din senin. Tensiune pe cond aprox 320 V. Tensiuni pe CN 1 in regula 5V , mai putin cea de 16 V ( ar fi trebuit sa fie 12 V ). http://monitor.espec.ws/files/changong_ ... 3w_207.pdf Link to comment Share on other sites More sharing options...
Guest robertimreh Posted August 3, 2013 Share Posted August 3, 2013 Problema era in panoul de comanda on/off power.Nu inteleg de ce imi apar 16V in loc de 12 V pe circuitul de comanda power.De unde ar putea fi aceasta diferenta? Link to comment Share on other sites More sharing options...
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