samsung ps50q96hd

[tonyuk]

hi guys need some help with this samsung theres seem to be i would say shadows around people when i watch tv does so more on movent of people any idear plz ive tried to set the yfr screw it did help a little but not fix ?

[tonyuk]

Re: samsung ps50q96hd

hi guys need some help with this samsung theres seem to be i would say shadows around people when i watch tv does so more on movent of people any idear plz ive tried to set the yfr screw it did help a little but not fix ?

i should also state the tv had new ysus and buffers

[tom66]

Re: samsung ps50q96hd

I had one of these I could not fix. Same fault. Got a lot better once warmed up. It's called mal discharge and is caused by panel aging. Perhaps the only fix would be to update control board firmware but I'm not aware of any updates from Samsung.

[tonyuk]

Re: samsung ps50q96hd

ok so next to the yfr screw is another screw ive turn that and now the shadow has nearly gone

[tonyuk]

Re: samsung ps50q96hd

I had one of these I could not fix. Same fault. Got a lot better once warmed up. It's called mal discharge and is caused by panel aging. Perhaps the only fix would be to update control board firmware but I'm not aware of any updates from Samsung.

how do you update ?

[tom66]

Re: samsung ps50q96hd

Same fault as those sparkles on LG plasmas but not as bad. No update available as far as I'm aware, sorry.

[tonyuk]

Re: samsung ps50q96hd

ok thanks tom

[tonyuk]

Re: samsung ps50q96hd

right thought i had it sorted not so thinking i might just break tv and sell the boards

[tom66]

Re: samsung ps50q96hd

I had no difficulty selling same model with fault as described for £200, but it didn't sell for as much as it would had the fault not been there (would be around £250 to £300.) Then again the problem was quite minor and definitely went away 90% when warm...

[tonyuk]

Re: samsung ps50q96hd

I had no difficulty selling same model with fault as described for £200, but it didn't sell for as much as it would had the fault not been there (would be around £250 to £300.) Then again the problem was quite minor and definitely went away 90% when warm...

yer its a shame i can stop the shadows but then tv looks blurry or pixel dont know what to do as im new to this lol

[tom66]

Re: samsung ps50q96hd

I would try dropping Vs by about 5 volts and Vset as well (maybe 10 to 20 volts, can't remember if there's a test point for it.)

[tonyuk]

Re: samsung ps50q96hd

I would try dropping Vs by about 5 volts and Vset as well (maybe 10 to 20 volts, can't remember if there's a test point for it.)

how do i do that ?

[vinceroger69]

Re: samsung ps50q96hd

tom is it worth setting all the voltages back to panel spec i wonder if someone been inside this set before him and messed them up?

[tonyuk]

Re: samsung ps50q96hd

vs volts check fine with sticker on tv cant find test point for others

[tom66]

Re: samsung ps50q96hd

I would drop it 5V below sticker rating. Use adjustment screw on PSU board.

[tonyuk]

Re: samsung ps50q96hd

I would drop it 5V below sticker rating. Use adjustment screw on PSU board.

ok i will give that ago i did notice on the ysus there a screw at the top that looks chewed up ?

[tom66]

Re: samsung ps50q96hd

Could be someone has tried to adjust it too much.
To be honest, all my adjustments never got rid of the problem, they only made it get better quicker.
I checked all waveforms on the scope and it measured OK, the only conclusion was worn out panel.
13,000 hours in service menu, pretty poor for a panel rated 60,000 hours!

I had a PZ80 Panasonic with 16,500 hours, same generation (2008 PDP) and not a lick of maldischarge... but Samsung cannot get it right, even their new plasmas have these issues (see: red diffusion on D-series, red/green dots on C-series.)

[tonyuk]

Re: samsung ps50q96hd

ok thanks for your help ill give it one last go befor ebay gets the parts

[tonyuk]

Re: samsung ps50q96hd

hi tom why does droping vs volts help with this ? also love your youtube vids lol

[tom66]

Re: samsung ps50q96hd

Dropping Vs can reduce the energy going into the panel making image retention less likely, that being said it probably isn't significant enough to make much difference.