Hello,
recently i bought on ebay a cheap chinese power adapter 220V to 12V 6A .
It does not work well, it is defective
Its behaviour seems equal to the behaviour of a similar 5V 2A power adapter i bought some months ago:
Measuring the output with a tester, i read correct 12V voltage, but the current is low and it varies in time continuosly from 0 to 1.5 Ampere.
To explain better to you the behaviour of the power adapter, i connected it to a 55W bulb and made a video and uploaded it in youtube.
Here is the video:
https://youtu.be/JsC_0k1DCt8I made some snapshots of the PCB:
top:
bottom:
Hete is also another video that shows the behaviour when i connect the adapter to a fan:
https://youtu.be/IVyrdqqT0f8Some months ago i was able to fix the other power adapter simply substituting an electrolitic capacitor.
But that time was easy to find the faulty capacitor, because it was swollen.
This time instead seems not easy to find the fault,
do you think that can be a capacitor again?
can you someone help me?
do you have any suggestion to help me to find the faulty component?
thanks!