johnny_tda Posted April 11, 2013 Share Posted April 11, 2013 Buna. AM un TV Goldstar model: CF-20D26XSURSA: STR S5707uP: LG8534 - 07CC.I. Jungle: TDA8362BTeletext: C.I. CF7020NWRog frumos aveti schema pt acest model de TV (sasiu nu stiu ce cod are) , e defecta sursa , U1 =0VAm schimbat STR S5707 si cele 2 conde electrolitice din primar la sursa C 220uF/35V si nu vrea sa porneasca , nu oscileaza sursa , U1 =oV. Exista 310V pe conde de filtraj dupa punte, se alimenteaza si STR -ul dar nu oscileaza sursa.Am nevoie de schema sa studiez sursa, nu prea am reparat multe surse cu STR S5707.Vreau sa vad in afara de U1 ce tensiuni mai scoate sursa.Multumesc. Quote Link to comment Share on other sites More sharing options...
zvasile Posted April 11, 2013 Share Posted April 11, 2013 sasiu MC-64A,schema o gasiti aici; http://www.eserviceinfo.com/downloadsm/44422/LG_.html Quote Link to comment Share on other sites More sharing options...
laur_12 Posted April 11, 2013 Share Posted April 11, 2013 verifica r827 si r829 si la pin 7str 7,9v am intalnit intrerupte una din cele doua rezistente de 22k Quote Link to comment Share on other sites More sharing options...
johnny_tda Posted April 11, 2013 Author Share Posted April 11, 2013 multumesc mult, acum am descarcat schema , maine am sa ma ocup de TV.... revin cu detalii... Quote Link to comment Share on other sites More sharing options...
dan cod Posted April 11, 2013 Share Posted April 11, 2013 Grija cu STRS5707 ca sunt stifturi Quote Link to comment Share on other sites More sharing options...
johnny_tda Posted April 12, 2013 Author Share Posted April 12, 2013 am gasit dioda Zenner ZD810 in scurt, tranzistorul Q810 defect ( conducea in ambele sensuri) si R830 intinsa, avea 26 ohmi si trebuie sa aiba 15 ohmi, si o sa schimb si optocuplorul ca il banuiesc defect, are rezistenta intre pinii 4 si 5 ( intre emitor si colector la fototranzistorul intern ).R827 si R829 sunt bune. Dupa schimbare revin cu noi informatii. Multumesc inca odata pt schema si indicatii. Quote Link to comment Share on other sites More sharing options...
johnny_tda Posted April 20, 2013 Author Share Posted April 20, 2013 stiti cumva un magazin de unde pot cumpara optocuplor 4N35GV, Tz. C1026Y si Dioda Zenner cu tensiunea de stabilizare la 7.5V ca nu le gasesc niciunde ? Quote Link to comment Share on other sites More sharing options...
johnny_tda Posted April 25, 2013 Author Share Posted April 25, 2013 cu ce echivalent se poate inlocui tranzistorul din sursa C1026Y? Quote Link to comment Share on other sites More sharing options...
dan cod Posted April 25, 2013 Share Posted April 25, 2013 Tinand cont ca e folosit ca si stabilizator eu cam folosesc D882 .Verifica datasheetul cred ca va merge si acolo. Quote Link to comment Share on other sites More sharing options...
johnny_tda Posted April 25, 2013 Author Share Posted April 25, 2013 da care e codul complet la acest tranzistor ca dupa o cautare cu C1026Y imi gaseste CMOS SRAM si alte componente, nu tranzistop bipolar NPN... Quote Link to comment Share on other sites More sharing options...
dan cod Posted April 25, 2013 Share Posted April 25, 2013 Cred ca 2SC1026.Eu dupa schema asta as pune D882. Quote Link to comment Share on other sites More sharing options...
VASTech Posted June 11, 2013 Share Posted June 11, 2013 Salutare tuturor!Cine imi poate recomanda un magazin de unde pot cumpara un S5707 de calitate, ca e plina tara de stifturi (ca sa citez un coleg de aici de pe forum), am cumparat de la mivaroam un STRS5707-SKN, dar nu este de nicio treaba.Sursa imi porneste in standby fara consumator dar cand ii dau sa porneasca, moare, la fel se intampla si pe bec, deci nu am problema pe BO. Cade alimentarea de 32v din pin7 implicit cea de pe pin9 cand o las pe bec.Zicea cineva intr-un alt topic cu acelasi 5707 ca ar trebui sa mearga si fara optocuplor, este adevarat? Pot sa-i scot optocuplorul, sa-i pun bec si sursa trebuie sa-mi tina becul?Orice sfat e binevenit...Inca ceva... la magazinul respectiv aveau si STRS5707 si STRS5707-SKN, primul mai ieftin, al doilea mai scump... pentru cine a mai lucrat cu ele ... ce ar trebui sa scrie pe cele bune un afara de tip sa-mi dau seama ca e SKN sau nu.Multumesc! Quote Link to comment Share on other sites More sharing options...
dan cod Posted June 11, 2013 Share Posted June 11, 2013 Daca gasesti bune undeva spune-ne si noua unde.Intr-adevar STRS5707 are amplificatorul de eroare intern deci poate lucra si fara optocuplor. Quote Link to comment Share on other sites More sharing options...
VASTech Posted June 11, 2013 Share Posted June 11, 2013 Salut!Chiar nu exista un magazin "sigur" in tara asta? hmmm....Dar fara optocuplor merge sursa pe bec? Quote Link to comment Share on other sites More sharing options...
dan cod Posted June 11, 2013 Share Posted June 11, 2013 Cauta o schema de tv in care e folosit fara optocuplor si vezi ce trebuie sa modifici. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.