Re: Samsung LA40B650T1FXXY BN44-00264A PSU FS801S fuse blowing

Hi There

Thanks for all the replies and sorry for not posting photos of my board or the schematic diagram.

I've taken on board everyone's advice and comments. I've place an order with Utsource.net for the MOSFETs, Rectifier and the PFC chip as well as the diodes feeding into QP801S, QP802S.

I'll update when I receive the parts and solder them in.

Hi There

I have a short circuit in my BN44-00264A PSU. The FS801S blows immediately when powered up. There are no smells or visibly obvious suspect components. I've been reading through related forum posts and I think I have narrowed down the problem.

I removed components QI820 and QI821 based on a forum thread I was following (but I think this may have been unnecessary in my case). I tried the lamp across the fuse terminals. In my case I have electrician test lamps and these glowed brightly.

A few days later I discovered ~zero resistance across the...

Re: New Members - please post your introductions here

Hi Everyone, I'm from Sydney, Australia. I have found this forum extremely informative in attempting to fix my Samsung 650 series LCD TV which has no power. I studied electronics years ago and have built an AX84 valve guitar amp in the past as well as a few electronics kits.

I will be posting a question very soon as I think I've found the suspect component!