Samsung plasma PS-50P96, BN44-00175A PSU

[masaudio]

Hi all,

I have a TV with a fault of not starting up every time,
It is definitely a power supply board issue, I have found that all voltages work apart from the VS volts 200v rail.
So the set shuts down and tries again.
Even on the test bench with the PS-ON linked, its the same on the bench.

I cannot find the fault, and sometimes it does work and the set runs perfectly.

Thanks
Mark.

[masaudio]

Re: Samsung plasma PS-50P96, BN44-00175A PSU

OK just realised i wasnt connecting the VS on properly,
Now i have that triggered, still no volts but green LED does 4 flashes.

Thanks
Mark.

[budm]

Re: Samsung plasma PS-50P96, BN44-00175A PSU

Can we see good clear straight shot pictures of YOUR board whole top and bottom side?

[masaudio]

Re: Samsung plasma PS-50P96, BN44-00175A PSU

[masaudio]

Re: Samsung plasma PS-50P96, BN44-00175A PSU

There we go.. thanks, Mark.

[masaudio]

Re: Samsung plasma PS-50P96, BN44-00175A PSU

I have just been over the caps with an ESR meter, I found CX813, CX807, CS807, CQ810, CQ812 (all 47uf 50v) & CQ822 (4.7uf 50v)
All reading low or compare, replaced with new ones.. fault still the same.
I have tested every other cap and the only other one I replaced that was visibly blown was C8814.