samsung un26 / un26d4003bd power supply failure

[cashkennedy]

Re: samsung un26 / un26d4003bd power supply failure

I was worried it might now be damaged, but i havent tested it, and not sure id know a fool proof way to test it quickly. So im probably just gonna replace the cap that blew and then test pins 4-5 for the 15v.

[cashkennedy]

Re: samsung un26 / un26d4003bd power supply failure

Havent had any time to work on electronic repair for a while, but finally got a little.

I replaced the startup cap and it was still bad. Realized 1 fuse was blown (from when the startup cap was popped during testing), so I soldered a jumper across the fuse. Got 160v DC back across the primary of the transformer, but not getting any voltage to the SMPS IC. So likely something else was harmed when the startup cap blew.

I bought another power board on ebay in the mean time, and it worked, so I have the set working now. If anyone needs a broken power supply board for one of these tell me, though ill eventually start canibalizing caps from it.

The power supply model number is BN44-00348B though shop jimmy claims some other model numbers like BN44-00348A are equivalent. Not sure what went wrong with it , but I have my suspicions that the tranformer went bad, or the SMPS ic.