Samsung Power Supply Repair Fix HPT5034 HPT5054 HPT5064 BN44-00160A 162A 189A 190A BN44 DYP-50W2 

Thanks Man! I just repaired a power supply using your technics! I watched your video and went over pulled the power supply, and found the shorted FETs using your techinc of jumping the resistor from PS on to ground. Power supply started up but voltages were flucuating, and after removing the shorted FETs voltages were stable. You are a Master Tech.

Great troubleshooting video. I have read and read about isolation, and I could never understand what they were talking about, but this video really made me understand why I need my two isolation transformers. Also the FET testing was great, Wish there were video's like your around 25 years ago. I like you additude about teaching, and keeping stuff out of the land fills. Fantastic video

Thanks for the info. I tested my supply after replacing quite a few Electrolytic Capacitors all bulging up. All working now except "Va".

Way over my head since im a NEWBIE!!! But things are sinking in slowly THANKS for being thorough!! Please keep up the GREAT work!!!

Great video! i worked on switch mode power supplies for decades when i worked for a power supply company and your technique is very good. i just wanted to mention that when replacing electrolytic caps it's good to use 105C caps instead of 85C caps; they are higher quality and don't cost a lot more. They build these sets with the cheapest possible parts and you can improve the reliability by using upgraded parts as i know you do with the semicunductors.

Thanks for the video! A lot of good information there. I think it's one of the best repair videos I've seen so far.

Great video, thanks for sharing. I have the same model TV with intermittent screen going blank when it gets hot. I'll try your recommendations. I'm guessing the capacitors are shot but I'll check the FETs and transistors while I'm at it.

thank you, a lot of information to digest...

Thank You.You taught me something new

Thanks for a very thorough and informative tutorial. I just had someone ask me if I can fix this. I was right by thinking it should be fairly simple for someone who knows their way around a soldering iron. :)

Great ! One of the best ! Thank you ! Gents, please be careful when probing with your scopes these PSUs !

You have an excellent series of informative and easy to understand videos. Thanks!

Good video! It was a very good thought to advise using iso transformers...I have the Sencore combo iso & Variac, and a few old RCA Iso-Taps. I service professional audio amplifiers and vintage studio gear at my shop, but 90% of my work is on vacuum tube equipment, including a lot of vintage tube radios which have series heater strings that return to chassis ground at one point. An iso transformer is mandatory for working on equipment of this nature...After cooking one scope in my career, I learned to eliminate the ground reference to prevent not only a shock hazard, but protect my pricey Tektronix scope...Great videos!--Frank Ferraro--Audio Craft Electronics

I love these troubleshooting VIDEOS :)

This is my favorite video. I have watched it about 12 times. I love the way you turn the power supply on by using the PS on and the VS on. My question about this technic is this, I don't see these pins labeled on every power supply. Is there another way to find those pins?

Grate video Sir, alot of good information need to watch the video a couple of times,I lioke the about the resistors

Far be it from me to question norcal. His knowledge is amazing. But I'm concerned about using an isolation transformer on both the DUT and the scope. From my experience, only the TV should be isolated. Tektronix says isolating the scope can be dangerous and can cause high stress on the power supply and can cause inaccurate measurement. This is not a criticism. I have learned so much from these videos. It's just a concern

Another great tutorial!! Is there anyway you make some more videos troubleshooting with Oscope?

Nice video , me a Servido tanto para entender como probar Los fet , thanks man

The container the Mosfet comes in will prevent a static charge from building around the containers but do nothing to decay this charge, and an electrical charge can pass through it. An static-dissipative material such as an metal bag will cause the charge to pass around the surface (not through it) and will decay the charge. Technically the Mosfet should be shipped in metal static-dissipative bags, not that pink plastic anti-static stuff. The container you are using to dissipate the probes are anti-static, not static-dissipative. You can't discharge your probes this way. Thank you for understanding:)

Always the first thing to do is a close visual inspection of solder joints, components and look for broken tracks. ( A magnifier ( lens ) salvaged from a rear projection TV is useful for doing just that.

Great video!

Good info for beginner like me...Thanks

thanks i learn something GOD bless

How did you determine that the FETs were damaged and the Samwha Filtering caps were bad when they were still in circuit? You used the ESR meter on the caps while they were still on the board? Also, do you need to bleed the voltage off those high voltage caps before attaching an ESR meter?

Basically if all the vokt adjusters are messed up after I set the power supply vs and VA back with vokt meter proper for my HP is there a way to know how to set the adjusters I turned lie an idiot on ysus there is two and another on the daughter board one on ysus as well as the one on zsus, So four all together I don't know how to fix only know how to adjust the power supply ones back? Is there a system? By looking starting point after I correct the power supply ones with meter? Or are these test points available? HP4260N, thanks in advance!!

A very fanstastic peice of : 1,INFOMATION. 2,DO'S & DON'T'S 3,HOW TO VISAILY CHECK AND how to be safe at all times these may KILL.... thats why it is allways best to leave this kind of work it to the professonials, as it is no joke if you get caught out..

Great video

When you replaced those surface mount transisters with regular transisters. Did you use a NTE semiconductor guide to cross reference them?

Nice one !

nice bro ..good job

hi may i pls ask for any help , I have SAMSUNG PS42C96HDX/XEU , will not start, the PSU is DYP-42W2PLUS, STB 5V ok , blue led comes on flashes a couple of seconds , i hear relay ON ( normal click ) and then imediately it seems to go OFF ( softer click ) .In August ( max hot ambient 40 DEg C ! ) , the set used to require 20 min off the mains and then it would start , but then it stopped doing this, , i need schematic if possible and how to force ON for bench testing. this video is very clear on this, cam one assume ithe procedure PSON to GRD & STB5V to VSON will work for this PSU ?? your e-mail ?

Thank you so much. I thought you needed to force on PS out of TV when troubleshooting. Once I did that, I was able to get all my voltages up and running but what's weird is this board was know bad from a 55" I just fixed and I'm wondering if there could still have issue with startup circuit. I pulled PS_On low and tied Vs_On to 5 volts. I noticed a line called Vs_Con which doesn't have any voltage. Could this be original problem with this supply and if so, I'm lost at this point. Having trouble finding schematic. The board number is BN44-00447A (PB6FA-DY) Any help would be greatly appreciated! Thanks again, John

Nice fix. I have never seen Samwha primaries fail, but I suppose anything's possible with the crap capacitors Samsung use!

Great troubleshooting vids! Just wanted to ask where could I get the schematic for that diy esr meter? Keep up the good work!

Do the FET transisters need to be tested out of circuit?

Hello there, I am wondering if you can help me. this one have got me, wondering what is wrong. I have a Samsung plasma PS51D550C1MXXY. At the start I had a problem with the X-sus board I replaced it, then there was no power ( no Vs power or Va) I have replaced the logic, main and power supply but has not fixed the problem. The standby light is red and flashes at a rate of two flashes. I have fixed a few Tv's but this one has stumped me.

I am working on a LG moel # 42LB5DF-UL no blacklight, has all voltages except 3.4 volts for power on is 1.9 volts. I tried to make the pwer supply turn on by jumping power on to ground using a 1K 1/4 watt resistor. However, doesn't seem to be working. In your video you suggest jumping power on to ground, and V ON to ground. On this power supply I can't find a V ON There is 24 volts getting to both invertor boards. There doesn't seem to be any output voltage from the invertors. Help!

hi! i will like to if you can help me hey have a problem with my samsung power supply, every time I turn it on , the power relay keep clicking,about 5 to 8 time and i did the what you did the jump the ps-on and is keep clicking but faster that usual any ideas what may be the problem also i did bought a power supply and it does the same thing do you think taht this one is also bad thanks

Dear Sir: Where can I get the schematic of this power supply???

does this mean that you have to turn off at the power point every time if your forcing the power supply on?

How to troubleshoot Samsung plasma TV PS-42D5S with picture and sound turning on and off together after few hours of use?? Checked all the board and all component look OK?? Can you help..

I have problem with 5.3v power.

I would say that about 60-80% are labeled, if not on the PS then on the main board. otherwise you have to trace is out by hand.

PLEASE HELP ME! my samsung power supply is BN44-00192A, when i connect the board to 220V power, all output is 0V, PS on is 0V too, voltage on the capacitor (150uF, 450V) is about 300V. this main use 16 pin IC - MC33167 and 8 pin IC - A6159 but there's no 15V or 5V DC to feed them! i have replaced 0.22 ohm resister, MOSFET 11N60, all other res, caps and opto are in good condition! Someone told me that i should replaced the main Capacitor(150uF, 450)! Is that right? Sorry for my bad English!

Obviously this is not for the novice or radio shack amateur. For a do-it-yourself-er would it be more cost effective to have the board repaired or just bite the bullet and buy a new board ? Second ; could it be a blown fuse on the board that causes it to cycle off and on, as we've had a rash of power surges in the area before this TV (HPT5054X/XAA) went kaput, lol ? Thanks for your video's and input. ~James

Help/Ideas? Model: Sony KDE-42XS955 Type: Plasma Size: 42 inch Manufactured: 2005 Retail: $4,995 I bought my Sony KDE-42XS955 from B&H Audio Video in Manhattan for $4,450 in July of 2005. It was the absolute finest TV on the market at that time. It never gave me any problems during its 11-year-long life. It finally died in March of 2016. It was still producing a perfect picture up until it simply refused to power on. When it would power on, only audio was working. The video went from perfect to nothing. There was never and fading of its quality over time. This leads me to suspect there's some internal power supply issue, or something that has nothing to do with the TV's ability to produce an image. Because again, the image was always perfect up until it died. I wonder if this TV can be fixed? It was the greatest TV I'd ever owned, and I've had many since this one. Today's average market range TVs still aren't as good as this set. This is why buying the finest TV you can pays off. You future-proof yourself for at least a while. Again, except for the highest-end sets, my 2005 Sony plasma was better quality than 95% of the TVs made in 2018. Any ideas? Thank you for your time. -Mick O'Brien

When ever u repaired crt tv high amount of charge are stored in electroletic capicetor discharge the capicetor use bulb 2nd may be out the fuse and placed the bulb in fuse section and check the voltage In capicetor what is this this process is called bulb thory its safe and profitable no parts are dameged in this process its gud snd safe frm parts such in power supply firstly check fuse rectifire diode 4007 .capicetor voltage and check carefully aqurate drive volte go2 fet in section of power

I'm no professional, but simply being safe around electronics and taking precautions has prevented me from getting any electrical shocks after 40 TVs repaired. Unless you're stupid, it's pretty hard to get shocked, and you really should have a GFCI/RCD which will save you from the majority of potential shocks.

Thank you very will Sir i learn fom you always

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why the thumbs 1 down???