So I've had this rosewill 350W psu for quite some time now. It is of L&C origin. Not too badly built compared to other gutless wonders that were free with a $25 case. YC caps everywhere. Large sized main caps, 470uf, 200V each. input filter consists of the smallest y caps I have ever seen, along with a coil. standard 4 diode treatment.
I have NOT bought any of the parts used to rebuild this. They are all scavenged from 2 bestecs. One a bestec ATX-200, they other a ATX-250-12Z.
My handy work so far:
Replaced input YC caps with Panasonic 470uf, 200V caps. Replace red round X cap with actual X cap, put X cap in place where no X cap was. Replace tiny Y caps with larger, nicer Y caps. Install bridge rectifier (GBU606 6A @ 100C), replace smaller caps from YC to all CEC international holdings (Enermax uses these in almost all their new units), 5vsb cap 50v, 47uf to 50v 220uf Capxon (all I have right now). Have not touched the secondary caps yet. Jumpered it before with a quantum 10.2gb hard drive attached for a load.
I also added a plastic sheet that goes under the pcb to reduce the risk of shorting on the case. This was pulled from the bestec atx-250-12Z.
Before:
12V: 11.69-11.89, sparatic, constantly changing.
5v: 4.66-5.05, sparatic, constantly changing.
3.3v: 3.03V-3.14v, sparatic, constantly changing.
5vsb: 5.65v solid.
After (have not touched the secondary caps yet!)
12V: starts at 11.92, settles at 12.01
5v: starts at 4.99, settles at 5.02
3.3v: starts at 3.22, settles at 3.35
5vsb: solid 4.22 (not sure how that happened, but its not frying the chipset!)
Amazing what just a input filter will do. Now time for some secondary caps and see where those voltages will start off then.
Before pics:
After pics:
I have NOT bought any of the parts used to rebuild this. They are all scavenged from 2 bestecs. One a bestec ATX-200, they other a ATX-250-12Z.
My handy work so far:
Replaced input YC caps with Panasonic 470uf, 200V caps. Replace red round X cap with actual X cap, put X cap in place where no X cap was. Replace tiny Y caps with larger, nicer Y caps. Install bridge rectifier (GBU606 6A @ 100C), replace smaller caps from YC to all CEC international holdings (Enermax uses these in almost all their new units), 5vsb cap 50v, 47uf to 50v 220uf Capxon (all I have right now). Have not touched the secondary caps yet. Jumpered it before with a quantum 10.2gb hard drive attached for a load.
I also added a plastic sheet that goes under the pcb to reduce the risk of shorting on the case. This was pulled from the bestec atx-250-12Z.
Before:
12V: 11.69-11.89, sparatic, constantly changing.
5v: 4.66-5.05, sparatic, constantly changing.
3.3v: 3.03V-3.14v, sparatic, constantly changing.
5vsb: 5.65v solid.
After (have not touched the secondary caps yet!)
12V: starts at 11.92, settles at 12.01
5v: starts at 4.99, settles at 5.02
3.3v: starts at 3.22, settles at 3.35
5vsb: solid 4.22 (not sure how that happened, but its not frying the chipset!)
Amazing what just a input filter will do. Now time for some secondary caps and see where those voltages will start off then.
Before pics:
After pics:
Comment