cnc Posted February 17, 2014 Share Posted February 17, 2014 buna seara.am la reparat acest monitor care avea rastru cu dimeniunea micsorata pe orizontala,am gasit trz q713 intrerupt vreau niste pareri as vrea sa va intreb despre cauza care adus laacest defect ,sau este din cauza exploatari indelungate va multumesc Link to comment
leoncris Posted February 18, 2014 Share Posted February 18, 2014 "cauza care adus laacest defect" - alterarea filtrajelor. Nu m'am uitat in schema , dar ... Schimba C_urile , primat /secundar sursa cu unele la 105 grd. , verifica tensiunile si daca totul este OK , montezi tranzistorul nou. Atentie la sifturi.Verifica C_urile noi pe ESR inainte de implant si ... tranzistorul. Link to comment
cnc Posted February 21, 2014 Author Share Posted February 21, 2014 buna ziua revin la acest monitor am cumparat tranz lam scimbat am schimbat si condesatori din sursa tz vad ca rezista nu se incinta dimensiunea arevenit pe orizontala dar aparut alt defect rez r777 ce alimenteaza c lui q717 se incinge am verificat tensiunile pe tz ,e=0v c=5v b=1,4v tz find saturat in schimb nuapar inpulsuri in baza tz am cautat schema monitorului nu am gasito va rog pareri va multumesc Link to comment
cnc Posted February 27, 2014 Author Share Posted February 27, 2014 buna seara daca stie cineva ce tensiuni scoate sursa acestui monitor va multumesc Link to comment
nostrom Posted February 27, 2014 Share Posted February 27, 2014 Inspirati-va dupa acest model,prezentat aici; http://www.go-gddq.com/upload/2009-12/0 ... 155668.pdf, Link to comment
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