Electronics > Repair
Chinese switch mode power supply
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Lango1818:
Just purchased two 240/48 volt 10 amp switch mode power supplies off Ebay I will repot further on the extremely bad workmanship soon. However I was wondering what authority one could send a complaint to about the unsafe nature of these supplies.  One supply had a resistance of 8 ohms between earth and the main metal body and 200 ohms between the metal lid and earth. On investigation I found the circuit board to be a nightmare, with hr solder joints everywhere. Some components not even properly soldered in, I could move the output choke and capacitors making the wires slide in and out of the circuit board.
I have repaired both power supplies and now have less than 0.1 ohms between earth and the metal case. They also appear to work as they should.
wraper:
These often also have an e-waste mains side bulk electrolytic capacitor with a new shrink wrap to make it look less obvious it's salvaged trash.
fzabkar:

--- Quote from: Lango1818 on November 12, 2024, 10:19:57 am ---Just purchased two 240/48 volt 10 amp switch mode power supplies off Ebay I will repot further on the extremely bad workmanship soon. However I was wondering what authority one could send a complaint to about the unsafe nature of these supplies.  One supply had a resistance of 8 ohms between earth and the main metal body and 200 ohms between the metal lid and earth. On investigation I found the circuit board to be a nightmare, with hr solder joints everywhere. Some components not even properly soldered in, I could move the output choke and capacitors making the wires slide in and out of the circuit board.
I have repaired both power supplies and now have less than 0.1 ohms between earth and the metal case. They also appear to work as they should.

--- End quote ---

In Chinese manufacturing, the customer is the final phase of the quality control process.
Lango1818:
I guess so long as Blackrock/Vanguard are making a profit they do not care about quality control
Poroit:
G'day Lango1818,

Did you see this?

https://community.ebay.com.au/t5/Buying/Electrical-electric-electronic-compliance-safety-and-regulation/td-p/2123944
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