16 Dec, 2014 Rakesh Sharma
Guides .
Removing PCB
Unscrewing and removing the pcb for modding.
A closer look on primary and secondary capacitors
Replacing primary capacitors (CapXop 470uf / 220v) with Nichicon 560uf/250V
Power capacitors must be discharged before de-soldering. I do it by connecting 1K ohms 10W resistance directly to terminals of the capacitors for few minutes.
Now for surge protection circuit. The recommended components for this stage are two ferrite coils, two ceramic capacitors , one metalized polyester capacitor and one MOV (metal oxide varistor) on each main rail.
Adding Hitano CTX 0.47uf capacitors
Now adding two ferrite coils and two MOVs
Replacing secondary capacitors. First standby 5 voltage cap.
1000uf/6.3v replaced with Rubycon 1000uf/10v
Also added a filter coil for 3.3 v supply.
Finally all done.
Since this PSU is new so I think there is no need to replace the fan. But if you are modding an old PSU, you should replace the fan also.
Result
Now PSU is stable, voltage ripple also reduced and now EMI filter and surge protection is enable.
Now just a Image of a Good PSU from Inside. This is Corsair CX430 PSU
Hope this will give you a good idea about modding a PSU.
Thanks
Rakesh Sharma