From a 80's fortune cookie... If at first you don't succeed, redefine success!

That was a fantastic effort. I learned a lot.

Oh bummer, I had my fingers crossed at the end hoping for the best, but 😲. Full credit to you Chris for persisting anyway, and it was interesting to watch. 👍

I know the feeling of being intrigued and enjoying the challenge. Good on you for being able to quit when the problem isn't worth the effort. I have a problem of not being able to let something go. I would buy a new one and dismantle it also to find what the original fault was. But i usually end up more confused.

Switch mode power supplies can be a bit of fun like that. I have never had a faulty transformer in one and I have fixed hundreds of them in all sorts of equipment. Its usually something switching the transistor, or transistor inside a chip in this case, hard on so it basically shorts the power out and is turned into a short circuit. I learned to always check all the resistors in the primary for high or open circuit as they do fail. Its best to replace any small electro caps also even if they measure OK on the primary side. Also that unit has an optocoupler feeding back from the secondary which can sometimes cause an issue, eg a faulty cap on the secondary can affect the primary, though it usually results in overvoltage or no output rather than a dead chopper transistor on the primary. I think all that silicon or glue is just there to stop the parts moving during the wave soldering process and I have never bothered to replace it. It might also be to stop high frequency vibrations or something but leaving it out doesnt seem to cause any issues. That sort of supply usually fails with a short circuit, so a slightly higher value fuse shouldnt matter, though it may not pass safety regs for a manufacturer because it might take a few milliseconds longer to blow.

If you are feeling bored have a go at dismantling a dyson battery pack, they are a nightmare so I made some special tools to dismantle them and no war wounds. I get heaps of those dyson chargers in hard rubbish. I did find a charger for something else in hard rubbish and when I got home it was plugged in. There was the loudest bang I have heard for a long time and plenty of scorch marks on the power point. So I opened it up, it was full of water!

Haha... well tried Chris, I would have gone down the same road as you and ended in the same place. All good experience though 👍😃

Kudos for having a go and still posting the video! I've been through it with a toaster that had a similar exploding power supply IC. It only blew once but I couldn't get it to work. I have an identical Dyson power supply in my pile of stuff to fix - wish me luck! 😆

Thank you

Thanks for the video. Mine has stopped charging so I've pulled the charger apart and found the fuse has gone. No scorch marks or anything obviuosly wrong. Here we go

Yikes! I have the same vacuum charging in a bedroom. Now I'll make sure its on a surge protector and keep a fire extinguisher handy.

Barbequed! 😆 Was it out of warrantee? Good attempt! 👍

Well tried! I grind to a halt at the same stage as you!

Well, maybe the fail safes maybe kept your parents' home from a fire. I thought that silicone paste was thermal but also to keep parts from touching.

Great video as always, do you have spare transformer with the correct outputs, solder the Dyson cable to it so it fits the vacuum. Philip from the UK

My Mum said, "Don't dy-son, I know you're short & a rectifier, but if-use can fix my cleaner & not get board & you have the capacity, it'd be great." By the way, with your video, did Dee cee?

Yeh, if you look at the video at the stage your second fuse blew, there was a wisp of smoke arising from that IC, and if you'd smelled around there, I'm sure you'd have identified what had burnt! Secondly, there is no space to lie that fuse down, so, standing on its head like that, there is a bare wire with 230V leaving the top and diving down to the board again. That is why it is covered in heat shrink!

Oh dear.

Can’t hide the disappointment on your face mate. I’ll be waiting for part 2.

U should just soldered a thick piece wire as the fuse. Job done 👍. Why couldn't you just solder the wire from the Dyson on to the other Transformer U had. Cheers Graham

All that work. 🫣oh well, at least you gained experience, and gave us some explosions.