Guest fakaretzu Posted October 12, 2012 Share Posted October 12, 2012 Buna ziua,Am un TV Clayton model CTV 3711, diagonala 37, sasiul 11AK36A15, CI:ST92195C7B1/OER, STV 2246H, KA 3842B,TDA2822... Am schimbat conzii din BO si alimentare: c613 10m/250V, C643 3.3m/160V,C820,827 47m/160V, defectul care se manifesta: porneste din telecomanda, dar cand apare imagine dupa 1-2 secunde intra in st-by! Am pus bec 40W pe alimentare 115V si e stabila. Poate sa fie trafo linii, cum il pot verifica? Ma poate ajuta cineva?! Multumesc! Quote Link to comment Share on other sites More sharing options...
dan cod Posted October 12, 2012 Share Posted October 12, 2012 Imaginea este corecta? Quote Link to comment Share on other sites More sharing options...
radu ionel Posted October 12, 2012 Share Posted October 12, 2012 Buna ziua, Am un TV Clayton model CTV 3711, diagonala 37, sasiul 11AK36A15, CI:ST92195C7B1/OER, STV 2246H, KA 3842B,TDA2822... Am schimbat conzii din BO si alimentare: c613 10m/250V, C643 3.3m/160V,C820,827 47m/160V, defectul care se manifesta: porneste din telecomanda, dar cand apare imagine dupa 1-2 secunde intra in st-by! Am pus bec 40W pe alimentare 115V si e stabila. Poate sa fie trafo linii, cum il pot verifica? Ma poate ajuta cineva?! Multumesc! ______________________________________________________________Deci, bara de U1=115v este corecta.Consumul pe bara U1 nu trebuie sa depaseasca 350/480 mA(verifica;eventuale scurturi ale tensiunilor recuperate ale trafo linii 26v-BV si 200v-video).Poate este screean-ul prea mare UG2=380/450v ,se regleaza din potentiometrul de jos al trafo linii.In perioada cind apare imaginea 1/2 sec, imaginea cum este(apare cu dungi orizontale -rastru si cursa inversa pe cadre???sunetul apuca sa apara???... Quote Link to comment Share on other sites More sharing options...
Guest fakaretzu Posted October 12, 2012 Share Posted October 12, 2012 da, imaginea este corecta, am sa verific si sunetul si consumul pe U1. Am sa revin luni cu masuratorile! Multumesc foarte mult pentru raspunsurile dumneavoastra! Quote Link to comment Share on other sites More sharing options...
Guest fakaretzu Posted October 15, 2012 Share Posted October 15, 2012 problema cred ca este din sursa, am pus bec si nu mai pleaca Quote Link to comment Share on other sites More sharing options...
dan cod Posted October 15, 2012 Share Posted October 15, 2012 Decupleaza finalul linii cand pui bec pe sursa.sper ca ai facut-o.NU se aprinde becul deloc?300V ai? Quote Link to comment Share on other sites More sharing options...
Guest fakaretzu Posted October 15, 2012 Share Posted October 15, 2012 am decuplat finalul linii, palpaie slab filamentul de la bec, am 300V la condensator 47m/400V. Mai inainte am refacut lipituri, a pornit pentru putin timp 1-2 minute, dupa care a disparut iar +B. Sa fie vre-un smd? Mai sap! Quote Link to comment Share on other sites More sharing options...
riderinblack_tm Posted October 15, 2012 Share Posted October 15, 2012 Ce tensiune ai pe B+? Quote Link to comment Share on other sites More sharing options...
Guest fakaretzu Posted October 16, 2012 Share Posted October 16, 2012 in momentul de fata am 11V! Quote Link to comment Share on other sites More sharing options...
dan cod Posted October 16, 2012 Share Posted October 16, 2012 Clar sursa defecta.Verifica si rezistentele sa nu fie decalibrate Quote Link to comment Share on other sites More sharing options...
zvasile Posted October 16, 2012 Share Posted October 16, 2012 in momentul de fata am 11V!in st-by sau on?sarcina artificiala (bec) se monteaza dupa ce pornesti tv din st-by,altfel sursa nu porneste Quote Link to comment Share on other sites More sharing options...
radu ionel Posted October 16, 2012 Share Posted October 16, 2012 In st-by ,Nu are cum sa fie pe bara U1 11v pe dioda D803...Sursa aceasta 11ak36a15 echipata cu ka(uc)3842+tranz.Mosfet(fara opto,mcr22.8,tl431 etc,fiindca/deci, nu are nicio referinta fata de U1>>>.pleaca direct ;Tensiuni secundare trafo Chopper TR801;..1)dioda D803 >U1>33v...2)dioda D806>11v>surs Q805>upa=5v,upd=5v necesare ptr. procesor pin 21.39 si 25,26,31,32...si 3)dioda D804 >12v.Tot din bara de 11v(D806),numai,la comanda procesor on/power pin 47 comanda tranz. Q803(st-by) si apar tensiunile a)de 8v-lm317>5v-7805 ,necesare ptr.jungla STV 2248(8v Vcc1 pin 45>Vcc2 pin17 si 5v pin 12,53....b)in st-by/off tensiunile de 8v si 5v nu sint existente,si B.O nu porneste fiindca jungla nu este alimentata ,deci lipsa Hout pin48)..... Quote Link to comment Share on other sites More sharing options...
Guest fakaretzu Posted October 19, 2012 Share Posted October 19, 2012 scuze, am avut probleme cu internetul, asa este la DOLCE , am reparat sursa(trasee intrerupte), acum am 120V +B, respectiv 11,3V pe C 822 si11,8V pe C 841, pe pin 3 la LM 317 am 11V, pin 2 1,3V, pin 3 0V. Sa fie defect LM 317? In momentul de fata TV-ul nu mai porneste, ledul palpaie pe rosu Quote Link to comment Share on other sites More sharing options...
dan cod Posted October 19, 2012 Share Posted October 19, 2012 Deci intrare are.Putin pe pinul 3 .Nu ai scurt pe iesire(pinul 2 la masa?) Quote Link to comment Share on other sites More sharing options...
Guest fakaretzu Posted October 19, 2012 Share Posted October 19, 2012 nu este scurt pe pin 2 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.