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Equipment Repairs => LCD TV forum => Topic started by: scooby-doo on September 13, 2011,17:00:31

Title: mlt070a buzzing transformer
Post by: scooby-doo on September 13, 2011,17:00:31

hi

i have a mlt070a psu that had a couple of bulgy cps 10v 1000uf changed both of them and now the tv powers up green light etc but a loud buzzing from the transformer and no picture on screen

can anyone offer any advice on this one please

with thanks

Title: Re: mlt070a buzzing transformer
Post by: WILLYAM1 on September 14, 2011,01:45:32

hi.
check the 1000u\35 and small47u and 100u both in primery for 5v stby.
also check the 2 big cap in primery and check the diode in the pfc  section.
willyam1

Title: Re: mlt070a buzzing transformer
Post by: scooby-doo on September 14, 2011,16:42:29

Thanks Willyam1

Changed the caps you mentioned and all is ok.