Electronics > Repair
Help Please, Switching Power supply shutting stright off.
<< < (8/8)
fzabkar:
If there is a leak between the primary and secondary windings of T1, that would cause a current to flow in the ground. Otherwise, the DC side would be floating and remain unaffected by the leak. Would it be an idea to open the DC ground and insert a Y capacitor or a resistor and measure any voltage drop?
asis:
Hi,

I assume that you connect your PS to the network using a standard cable that ends in a standard C13 network connector.
As far as I understand, wall sockets (GB) differ from Eurostandard fittings but have the same values ​​(Line, Neutral, Earth).
You answered somewhat vaguely in one of the previous posts about the house RDC.
Is everything in order with the ground loop in your room (in your house)?
Can you check the voltage values ​​at the cable connector (C13) Line & Neutral relative to Earth (i.e. ground loop)?
It is possible that you have a poor connection to the ground loop or the loop itself, which contains “stray currents.”
Also, the house RDC itself can contribute to this.
The spread in the parameters of capacitors C2, C3 can be large, and, for this reason, the voltage potential at the midpoint can affect the behavior of PS.
The easiest way to test this version is to turn on this PS in another house, anywhere.
The PS circuit is original and differs from many similar power supplies.
As a rule, in the primary winding of the transformer, in order to suppress current surges during the reverse stroke, in addition to elements R4, C7, a damper is used diode (TVS suppressor).
Why the developer abandoned it is not clear to me.
Take this into account.
-
Judging by the photo, radiator H2(Q1) has poor contact at the connection point to GND, and capacitor C4 (CS472M) is connected through H2.
Navigation
Message Index
Previous page
There was an error while thanking
Thanking...

Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod