recapped AOpen AK77-600 Max

[Achelon]

Hi,

Just gonna say a big thanks to you guys. From the info on this site I was able to repair my AOpen AK77-600 Max board. It worked for 4 years then developed random crashes.

I checked the board and all the 2200uf KZG caps in the CPU VRM had failed. I replaced them with Panasonic FC's and prime95 has been running for 12 hours now with no problem and vcore is rock stable.

As an interesting aside, the mobo manual devotes 2 pages to these caps, describing them as:

"The quality of low ESR capacitor (Low Equivalent Series Resistance) during high frequency operation is very important for the stability of CPU power. The idea of where to put these capacitors is another know-how that requires experience and detail calculation."

Regards,
Achelon

[Gianni]

Re: recapped AOpen AK77-600 Max

Congratulations and welcome on Badcaps

Gianni

[370forlife]

Re: recapped AOpen AK77-600 Max

In their defense, UCC KZG's should have been good, but UCC made a few mistakes on them.

[c_hegge]

Re: recapped AOpen AK77-600 Max

The problem with KZG is just that they don't like getting hot, so if they're located near the CPU they often fail. Also, Panny FC aren't a recommended replacement for KZG. If you're going to use Panasonic, use FJ series, although I suppose if it works, it works.

[Toasty]

Re: recapped AOpen AK77-600 Max

The FJ's (and FL's) sound great, so do Sanyo's, but sourcing them is a problem. Most appear to be old stock/overstock buyouts from manufacturers. Ebay is a resource, but they're all coming from China suppliers.

Ruby's & Samxon are available right from Badcaps.net. Nichicon HZ's from Mouser. Panny FM's (not a first choice in VRM's, but certainly better than FC) from Digikey.

Toast