MattP Posted October 26, 2016 Share Posted October 26, 2016 Hi guys I have a Samsung 42 Inch Plasma tv Model:PS42A457P1D which I have had since 2008 however it has recently stopped turning on. For any of you into this sort of thing you will probably of heard that Samsung Plasma screens from around this year suffered manufacturing issues with the on board power supply more specifically a few capacitors. Moving on I have removed the rear cover which to no surprise shows the offending bulging capacitors on the power board pictured below. Now I understand the capacitors are only a few £ and it is apparently as simple as de soldering the old ones and soldering in the new ones however I'm just looking for some clarification... Am I ok to remove the power board and de solder these capacitors or are some parts still live? The TV has not been plugged in for over 24 hours. Quote Link to comment Share on other sites More sharing options...
Ric Posted October 26, 2016 Share Posted October 26, 2016 easy, the 2 which have expanded you just need to replace. The -minus side is usually marked with a light grey strip with - - - marks on. just replace those 2 and see how you go. i've done a similar repair cost me 32p. The values will be on the side, you just need to buy the same then de-solder and solder the new ones in. in the SAME orientation Fingers crossed then it should work, or the failing capacitors might have taken something else with it. Quote Link to comment Share on other sites More sharing options...
MattP Posted October 26, 2016 Author Share Posted October 26, 2016 I don't have to worry about getting an electric shock do I mate? It's been unplugged for more than 24 hours. Should I be wearing rubber or latex gloves? Quote Link to comment Share on other sites More sharing options...
ManwithSupra Posted October 26, 2016 Share Posted October 26, 2016 I wouldnt worry about it, if you are really worried then pop a multimeter across and check. However I really doubt they are going to be charged after 24 hours. Quote Link to comment Share on other sites More sharing options...
MattP Posted October 26, 2016 Author Share Posted October 26, 2016 Thanks guys Quote Link to comment Share on other sites More sharing options...
Ric Posted October 26, 2016 Share Posted October 26, 2016 Perhaps after a few minutes or even seconds, 100% no after 24 hours i wouldnt worry about it. Quote Link to comment Share on other sites More sharing options...
MattP Posted October 26, 2016 Author Share Posted October 26, 2016 Glorious This forum was worth the original £30 it's the gift that keeps giving. Quote Link to comment Share on other sites More sharing options...
stevie_b Posted October 26, 2016 Share Posted October 26, 2016 The biggest risk is you doing damage to the circuit board, rather than the circuit board doing damage to you. Earth yourself before handling it. Touching an unpainted radiator pipe is often a good way. You can wear a rubber mask if you wish. Quote Link to comment Share on other sites More sharing options...
Wez Posted October 26, 2016 Share Posted October 26, 2016 Subscribed as I want to see how you get on, keep us posted Quote Link to comment Share on other sites More sharing options...
Annabella Posted October 27, 2016 Share Posted October 27, 2016 Subscribed as I want to see how you get on, keep us posted If he never posts again you know whats happened. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted October 28, 2016 Share Posted October 28, 2016 I have done loads of them, having a vacuum de-soldering iron helps, but just wiggle the cap as you alternately heat each solder pad and it will come out. Blow the molten solder from each hole, fit new caps (get 125 degree C rated ones, they last much longer and only pence dearer) and you should be good to go. Buy branded caps like Nichicon, Sony etcetera. Switch mode power supplies rectify AC mains so the big caps will have 300 V DC on them when charged, that will concentrate the mind if you get a belt off them, i have had loads, and am still just about here My 5kV DC at 1 Amp supply is a different matter, I treat that with huge respect, you do not get a second chance with one of those! YouTube has dozens of videos on fixing switch mode TV supplies. Quote Link to comment Share on other sites More sharing options...
MattP Posted October 30, 2016 Author Share Posted October 30, 2016 Well then gents I have de soldered the old popped capacitors as seen below. I popped the Maplins and bought some new ones for the grand total of £1.23 got home soldered the new units in and reassembled and as you can see it was a great success. I love the Internet.. Quote Link to comment Share on other sites More sharing options...
Wez Posted October 30, 2016 Share Posted October 30, 2016 Nice work Quote Link to comment Share on other sites More sharing options...
Annabella Posted October 30, 2016 Share Posted October 30, 2016 He's alive! Quote Link to comment Share on other sites More sharing options...
MattP Posted October 30, 2016 Author Share Posted October 30, 2016 He's alive! I actually wore a set of Marigolds I was that anxious about touching the board haha Quote Link to comment Share on other sites More sharing options...
Ric Posted October 31, 2016 Share Posted October 31, 2016 Yey congrats, easy wasn't it Quote Link to comment Share on other sites More sharing options...
MattP Posted October 31, 2016 Author Share Posted October 31, 2016 Very easy... I hate throwing things away haha Quote Link to comment Share on other sites More sharing options...
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