Chinese power supply troubleshooting : probleme to ask for...

Thread Starter


Joined Nov 22, 2022
Hi guys !

First i'm new member here with you , and i hope you guys help me with my power supply kit problem:

When I applay any load to this power supply , then blow up Q2 or Q4 !? The load is small , about 2W bulb .

Any suggestion ?


Audioguru again

Joined Oct 21, 2019
This kit is a copy of an old circuit that had many errors.
Some of its parts including the opamps are overloaded and some have poor quality.
I worked on the original defective circuit 17 years ago on a different forum and fixed its errors and overloaded parts.
Here is my latest parts list and schematic: