I would have used the hot air to remove the mystery component. I think the hot air would have not only softened the solder, but also the glue at the same time. Like these vids that search and reason out what's wrong. Thx.
Interesting circuit! I wonder, that diode with the blue stripe measuring open both ways, could it be a DIAC? Those are symmetrical with 30V breakdown. Good approach with the M8p device, good luck further!
RA4 can also be a pnp transistor, SRA2204S. Similarly, M8 in a sot23 package could be a voltage regulator, a voltage detector, a mosfet, an npn transistor or a zener diode. M8P is a mosfet, BSN20W.
@@LearnElectronicsRepair It's a common practice unfortunately. After looking at your follow up video, I see it was maybe a thin PCB track. Same function. It looks like a "fuseable link".
Electrician here. Do household and commercial. Would love to make an incursion into electronics and hopefully start fixing stuff for a living. It's been extremely valuable for me to watch guys like these to know what the hell to do for starters. Northridge Fix dude is also very useful.
I would do the same thing see if the customer could bring a good one so i could refernce the good with the bad... i would assume he has more then one of those!!! but it had a massive short to be blown up like that... it does not look like a quality circuit to me ... looks like a very cheap thing like what you would find on ali...
![YoungBoy Never Broke Again - Sneaking [Official Video]](http://i.ytimg.com/vi/1ILUps2zDFU/mqdefault.jpg)
So much can be learned by observing an experienced man talk his way through a job. Thanks for sharing.
*Part two is mostly recorded and edited - should be good for tomorrow*
Hi Richard, Great video. Regarding your solution; remember, lazy and efficiënt live very close to eachother😊
They certainly do
I would have used the hot air to remove the mystery component. I think the hot air would have not only softened the solder, but also the glue at the same time. Like these vids that search and reason out what's wrong. Thx.
Hope this prospective client has another one of these. You did well to ask for it, so that you make your life easier Rick.... 😊
Looks like an unusual design but going by the '99 date codes it's worked for ~25 years. Impressive.
I think the diode looking component next to the transistors is actually a diac.
Yes, looks to be a standard (naff) electronic transformer. Diac typically 30V (don't quote me on that)
It could be. Find out in part 2
Interesting circuit! I wonder, that diode with the blue stripe measuring open both ways, could it be a DIAC? Those are symmetrical with 30V breakdown. Good approach with the M8p device, good luck further!
It's very excellent 👌
Thanks great video 😊
The metal dust on the plastic cover is giving big clues of this board having been wet.
Yeah I think so too
Heya, oh wouw that has bin a very nice shoting and burning looks like the live stream lol
RA4 can also be a pnp transistor, SRA2204S.
Similarly, M8 in a sot23 package could be a voltage regulator, a voltage detector, a mosfet, an npn transistor or a zener diode.
M8P is a mosfet, BSN20W.
Agreed. I do work out at least one of those in part two 🙂 Which one you have to wait and see...
The burnt area near the mains input was a fuse. A piece of small gauge wire that has been vaporized.
A bit of wire just soldered between the two tracks?
@@LearnElectronicsRepair It's a common practice unfortunately. After looking at your follow up video, I see it was maybe a thin PCB track. Same function. It looks like a "fuseable link".
Richard, Peak should send you one of their sot-23 holder/break-out-boards
Actually I have something like that on the way for me to review 🙂
I believe that component is a double diode or a diac, Rich.
Electrician here. Do household and commercial. Would love to make an incursion into electronics and hopefully start fixing stuff for a living. It's been extremely valuable for me to watch guys like these to know what the hell to do for starters. Northridge Fix dude is also very useful.
I would say you will be taking the route of least resistance not cheating😂
Thick spider may have went in there, no good.
Lacks smoothing capacitor because it is configured as dimmable.
Appears to be a burnt trace on AC side of bridge?
Yes I did mention that... or is it in part two. Another viewer believes a piece of thin wire was soldered there as a fuse
Sorry I jumped the gun...
Couldn't wait to leave a comment. Smiley face 😆
How old is this thing, I cant quite see the inspected date. Looks to say 83.
compare it with a working one.
Which is what I said in the video yeah?
I would do the same thing see if the customer could bring a good one so i could refernce the good with the bad... i would assume he has more then one of those!!! but it had a massive short to be blown up like that... it does not look like a quality circuit to me ... looks like a very cheap thing like what you would find on ali...
True - however it seems this thing predates AliExpress by some decades
But, anyways, this is a rather weird circuit.