Desoldered Capacitor

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Insty
Posts: 23
Joined: Sun May 13, 2007 7:57 pm

Desoldered Capacitor

Post by Insty »

While handling a 2 gen Pulsar 2, a capacitor desoldered from the top board, in the left corner -- viewed with main board facing down -- on the side opposite of the PCI connector -- same side of the S-TDM connector.

Can someone tell me what position it should be --capacitor has a black half circle oriented on one of the pins-- or show a picture of your own?

Thank you.

EDIT:Well, I've fixed it. I measured the board to find the polarity before POST :D but now for some reason the key file won't load :-?
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astroman
Posts: 8446
Joined: Fri Feb 08, 2002 4:00 pm
Location: Germany

Re: Desoldered Capacitor

Post by astroman »

oops, does that mean you powered the board up and measured it inside the PC ? :o
that wasn't necessary as all caps (of a group) are oriented identically and it's pretty obvious which connector is ground and which is supply...
anyway - here's a couple of things to check
did you apply too much solder, shortening another signal ?
when the cap came loose, was it by force or did it plop off by itself ?
in the first case (unlikely though) a part of the circuit board may be damaged

worst case is you erased the eeprom of the board (or modified it's content), by accidently hitting that magic line.

But usually it's just a bad placement of the board in the slot - remove and plug back in or change the slot.

good luck, Tom
Insty
Posts: 23
Joined: Sun May 13, 2007 7:57 pm

Re: Desoldered Capacitor

Post by Insty »

Well since I'm a noob in electronics I went to a friend that works with them (he's got master in electronics) and he managed to figure it out and help with the soldering. He also said these are decoupling capacitors used for stabilizing the high freq noise and weren't crucial for the board to work.

I've also managed to instal everything, first fixed the "real" extension of the keys file -- it was skf.txt and for some reason the content missed a space between the date and keys. So now RTFM for figuring out scope and what it can do, but i'll leave that to my friend who's the real owner. :D

Thanks! :)
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