This fairly common power supply has a very silly flaw involving the choice of assembly hardware. It also has what I would describe as just-acceptable separation of tracks with no anti-tracking slots.
These power supplies are the type normally seen lying loose in shop windows connected to badly installed LED tape and with their open live terminals perilously close to random metal junk in the vicinity and the aluminium window frame.
The hot diode issue is why I always recommend under-running these power supplies for a much longer lifespan.
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These power supplies are the type normally seen lying loose in shop windows connected to badly installed LED tape and with their open live terminals perilously close to random metal junk in the vicinity and the aluminium window frame.
The hot diode issue is why I always recommend under-running these power supplies for a much longer lifespan.
If you enjoy these videos you can help support the channel with a dollar for coffee, cookies and random gadgets for disassembly at:-
http://www.bigclive.com/coffee.htm
This also keeps the channel independent of YouTube's advertising algorithms allowing it to be a bit more dangerous and naughty.
Hello!
It's amazing how the Chinese manage to create really simple running systems!
That was also once in the West, until ???
Good analysis!
Thanks
Let's keep feeding the algorithm
Thanks that you have tried to measure the Voltage-drop through the diode and explained why it didn't work, I did the same fail and couldn't figure out why until now
Is there a reason there’s no safety caps or varistor other than budget?
How do these CRAP products earn a CE mark???
Is the CE mark in fact meaningless???
The steel is electrolytically galvanised and the the surface is phosphate treated to provide an 'anti-fingerprint' effect. It's not at all reliable therefore for a connection unlike British Steel's *Zintec*(tm) which provides an excellent conductive surface. In Asia they seem to be really keen on the phosphated stuff which is a pig if you want a decent chassis earth.
I want copy this driver please help
I need this pcb data chart with all smd component
Odd that the input rating does not just state 85-240 VAC. Splitting the ratings implies to me that there is a selection that needs to be set inside. Would be interesting to see what it does with the low AC voltage input – might work?
I had one of those go bang on me, the legs of the 470uf smoothing cap went thru the isolation in the case
Clive
It has the European CE to Chinese Export mark so it should be safe Ho Ho.
Use to visit an large switch mode power supply manufacturer in the South West for two diffrent standards company's.
The quality manager fully tested all rebaged power supplies and their own to check they met either IT or other standard, usually international ISO/EN.
You would have had a field day there.
The dielectric test's on amps was intresting especially when they failed, reminded me of ElectroBoom.
There approvals lab had 4 permanent staff, he would sign/pass anything unless it passed all tests, not the CE one.
It now is part of a large Japanese coperation.
If the products do not meet the standards, main one is crepages and clearance between mains and secondary circuits and earrthing ect you should send it to your local Trading Standards.
As some one is going to be or has been hurt, killed or have a fire or both.
Thanks for your very technical and entertaining videos, love your cap.
I nearly burnt my place down forgetting about a cheap Chinese water heating element with zero cut off or thermostat, hope everyone's proud of me. It boiled away huge pan of water then started melting and was on fire when I got back to it! Genius!