This 12V 60W Lamp PSU has blown up. How to Identify the Blown Components and fix it CONTINUED

I have a SMPS from a fancy light fitting. I has clearly blown up. Can I fix it?

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ANENG AN8009 MULITIMETER
KAIWEETS HT118E MULTIMETER
VC480C+ MILLIOHM METER
MESR-100 ESR METER
XC6013L CAPACITOR METER

TM-902C TEMPERATURE METER
LCR-T4 COMPONENT ANALYZER
FNB58 USB ANALYZER
PCI POST ANALYZER
TL460S PLUS PCI_E ANALYZER
TOOLTOP ET120MC2 SCOPE
FNIRSI 1014D SCOPE
NPS3010W 30V 10A PSU
T12 STATION WITH M8 9501 HANDLE
M8 9501 HANDLE
YIHUA 982 Soldering Station C210/C245
FNIRSI HS-02 PORTABLE SOLDERING C210/C245
QUICK 861DW
PROS'KIT SS-331H

INFIRAY P2 PRO IR CAMERA + MACRO LENS
TOOLTOP ET13S THERMAL CAMERA METER
ET13S MACRO LENS
OPTICAL MICROSCOPE
TOMLOV TM4K AF FLEX
TL866 II+ PROGRAMMER
CH341 PROGRAMMER
NC-559-ASM FLUX

DESOLDER BRAID (I use size 8045)
HX-T100 SOLDER (0.6MM)
ESD-11 TWEEZERS

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Thank you
Richard

[LearnElectronicsRepair]

Say hi to Big Clive while you are there. 🙂

[wecansavenergy]

Excellent approach to this repair, and good of you to include the Netlist instruction. It takes a lot of time and patience to present these videos Richard. Thanks very much for sharing your skills. I look forward to the next episode! Brian

[Chief_Engineer]

Further to my previous comment: If you look at BigClive‘s YT „inside an electronic halogen lamp driver, with schematic“ you see the basic circuit, without the protection and temperature control bits, that oscillates at high kHz within the 100Hz rectified mains envelope. That way the component size makes sense. If you reorder your components slightly, you will probably come out at much the same circuit.

[sivoltage]

Brilliant video, would like to see more of these reverse engineering to schematics tutorials, Ive learned so much from this one. Thanks Richard!

[peterbrooks]

Thanks Richard. Another excellent video and such a detailed analysis. I had learnt some electronics theory but watching your channel with your terrific teaching style has taught me electronics in practice and reinforced the theory. Thank you.

[techobaz]

Richard, thanks for the tuition on Netlisting, most informative, as well as the whole reverse eng process. Great Video Mate !

[nikspanakis]

Interesting, very helpful approach for those one off cases that fixing a circuit is a must. Thank you for your effort.

[surgingcircuits]

Yeah, this was good! I now have another use for my LED tester. Think my method of reverse-engineering a circuit might be a little easier and quicker, but hey, really good. Real life jobs with information and details at this level are very productive for the recipient. Kudos!

[kennethdavis]

Always fun messing around with stuff like this.

[darkdepth]

Thank you so much Richard, you keep impressing me with your teaching skills. Just returned from the island ;)

[james.]

Grand video. Love watching and leaning reverse engineering circuit boards. Thanks from Down Under 🇦🇺

[Dutch_off_grid_homesteading]

Heya, yess love these smaller circuits it's for me for now complicated enough o it's good to learn from these kinds of circuits. still I had to watch the working of the total shematics 2 some pieces 3 times to untherstand what you were explaning as I'm still learning. and I love to see differant practical applications making people more aware of there surroundings

[julioguardado]

Great video. As I was thinking he ought to build a net list, boom, there it was. Takes patience to do this. I would have run off to the store and bought a new one.

That said, some things are worth fixing, and this is one technique that can be quite helpful when all else fails.

[Lyndalewinder]

Excellent video Richard - as always - but it looks to me as though this process, even for a relatively simple circuit, would take several hours to complete and I wonder whether anything other than the most expensive or rare circuit would actually justify such a repair technique and for multi layer boards it would be even more difficult. Thanks for posting - very informative.

[greengrayradio]

Very good detective work, Richard! The approach with the CAD program also was a refresher for my part (some years since I've used them much) The circuit you arrived at seems very much similar to the ones I've seen in compact fluorescent lights (some years ago, at least, and with smaller switching transistors, mostly) They had the exact same looking toroid driver transformer

[nigelfewster]

Once you had input all the components and net entries I was expecting the program to generate the schematic itself!

[BTW...]

Perhaps consider the phasing of TR2 secondary windings, and how that drives the transistors and MOSFETs.

[mikepanchaud]

Some interesting and useful techniques here. Just one thing to add, save your work every few minutes, or has it got auto save?

[kggaming]

That a nice and very informative video but i cut and jump one in while 😂

[OnStageLighting]

I'm not yet a big user of this kind of CAD, but have KiCAD and it seems a bit too extensive as I rarely produce schematics let alone design boards. However, I can see how to use this net list method to just clarify a set of components and their connections during a repair instead of just beeping out the traces and trying to keep it all in my head or scribbled on a bit of paper. Cheers.