Re: 5VSB voltage oscilating - CWT PSF400S



Sounds like a job for the weekend seeing tomorrow last day before easter.

Thanks people - will keep you informed.

BTW - anyone know much about PCB boards for Automatic Coffee Machines - have about 6 to fix (maybe better in a different thread) - mosfet's galore!!!...

Re: 5VSB voltage oscilating - CWT PSF400S

Thanks for the reply

I have taken some more pics and grabbed one from the link you posted.
Note the two caps with red circles under the heat sink in pic .....002.jpg are slightly rounded on top.

Also the two pics (005 and 006) are of the back side line up using the red circle with 005.jpg being under the heatsinks.

I plugged it into an Intel D915GAV mobi and the attached pic shows the power ready from the BIOS. However the second I turned on the PSU power switch on the back of the PSU (mains...

Hi there all - a newbie to this forum

I have a CWT PSF400S-30 (photo attached) and using a basic power supply tester the voltage on the 5VSB output is oscilating all over the place between about 4.5 and 5.2.

All the other outputs are steady within scope

Also when you turn it off you hear a phhuushing/hissing type of sound for about 3 seconds

Any suggestions or toss it?



Regards
Andrew...