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Old 02-11-2008, 05:51 PM   #1
acstech
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Default Biostar TF7025-M2 recap project

Nothing failed, but I use this in my test computer, so I need it to be reliable. I pulled all the OST's with vents and replaced them with Rubycons.

The board had:

15x OST RLP 1000uF 6.3v
3x OST RLG 1000uF 10v

Those were replaced by:

18x Rubycon MCZ 1000uF 10v

In addition to some UCC on the VRM input, and other smaller OST's without vents. I left those alone.

Now I know I violated my own rule by using a different series than what was on the board (replacing the GP RLG's with low ESR Rubycons), but I dont think it will hurt anything.

The board seems to work fine after being recapped.

Here's some pics:

http://i231.photobucket.com/albums/e...h/hpim0522.jpg

http://i231.photobucket.com/albums/e...h/hpim0521.jpg
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Old 02-11-2008, 06:29 PM   #2
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Default Re: Biostar TF7025-M2 recap project

Just a notice on your otherwise good job: put a fan on the chipset heatsink, it tends to be between warm and hot.

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Old 02-19-2008, 07:43 PM   #3
MD Willington
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Default Re: Biostar TF7025-M2 recap project

That's cool... My Biostar 6100-939 is still chugging along, since 2006 with the same caps it shipped with.
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Old 02-20-2008, 07:24 PM   #4
yanz
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Thumbs up Re: Biostar TF7025-M2 recap project

im thinking of recapping my boards that looks similar to yours, i also have a biostar 7050-M2 with solid capacitor on output vrm but KZG at the input. the rest are all OST (yuck..)

probably 3 month later i will recap all the ost and kzg with rubys or sanyo caps... wonder how much difficult it is to recap a rohs board with a 30W solder iron..
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Old 02-20-2008, 10:45 PM   #5
acstech
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Default Re: Biostar TF7025-M2 recap project

Just an update:

The board has now destabilized. I used Rubycon MCZ, the ones they sent me from Badcaps, to replace the OST's. I will be running folding, and if I come back an hour or two later the machine will be hard locked. It was always reliable before the recap. I would suspect the ESR is too low somewhere. I'll let everyone know if I can stabilize the thing.

So I wouldn't go recapping these things, just yet. If you do, make sure you get exact replacements for the cap series that come out of it!
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Old 02-21-2008, 12:32 AM   #6
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Default Re: Biostar TF7025-M2 recap project

Make sure PSU caps are in good condition.
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Old 02-21-2008, 10:31 AM   #7
acstech
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Default Re: Biostar TF7025-M2 recap project

Brand new PSU. Acbel 550w from the thread in the "announcements" section. And yes, the caps are in good condition. The only thing to change was the OST caps on the motherboard.

I figured it out. It now needs .012v more processor voltage to remain stable at the same speed. This despite the fact that I did not change anything in the CPU VR area.
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