Re: BUSH LED2497ODVDFHD, 17PW80 V2, Dead!

As support for the UF5404 option was mixed, and a 'quite advanced' option might be over ambitious for a first repair, I decided to play it safe initially and replace the bad D709, plus its paralleled D708 and D710, with a new set of three UF5402's.

I reassembled my Sharp 24" TV last night, and can happily report that it powered up normally and worked perfectly for the hour or so that I had it on.

So thank you BadCaps, and everyone that contributed to this thread!

Re: BUSH LED2497ODVDFHD, 17PW80 V2, Dead!

P.S. By using one, I mean replacing all three of course...

Re: BUSH LED2497ODVDFHD, 17PW80 V2, Dead!

One thought - Looking at the data sheet for the UF5402 diode, there seem to be others in the family which have higher max reverse, max rms and max DC blocking voltages, such as the UF5404. Would it help forestall this type of failure to use one of these higher rated items?

Or could such a substitution be likely to cause a problem?

Re: New Members - please post your introductions here

A quick hello, and a thank you to Topcat for starting this forum - which I found after a 24" LCD TV (which I was using as an external monitor for my laptop) went dead days after its warranty expired...I had no easy way to get it to a service center during office hours, and faced the prospect of just tossing it buying a new one...

Anyway, needless to say, google brought me here, I found someone else had had the same fault in the same power supply board, and my screen was alive again in 24 hours...
...

Re: BUSH LED2497ODVDFHD, 17PW80 V2, Dead!

Thanks TOM66 for your advice on this thread, and Andy for starting it.

I have a Sharp LC-24LE240E 24" TV which died about a week after its 12 month warranty expired, so pulled it appart and google's the part number on the power supply board.

That led me to badcaps.net. Andy's symptoms matched mine, and the layout in his photographs looked exactly like my TV. And following TOM66's advice above I found I had exactly the same shorted diode as others have had. Seems to be a real design flaw with these supplies....