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scottso
 Post subject: Disabling 48v output
PostPosted: Tue Oct 23, 2007 6:28 pm 
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Joined: Wed Jul 04, 2007 12:31 pm
Posts: 153
Location: California
So I accidentally shorted my 48v output and blew at least capacitor C14 (that was the only component visibly fried). I don't have anoterh 63V 1uF cap on hand so I was going to just disable the 48V output for now. Can I just disconnect IC2 until I get some replacement caps? My other outputs seem to be OK.
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owel
 Post subject:
PostPosted: Tue Oct 23, 2007 7:50 pm 
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Joined: Mon Jun 25, 2007 6:09 pm
Posts: 1261
Location: Music City
Do you mean C14 or C4?

C14 is for the +18V.

C4 is for the +48V.

What happened? Did you short the +48V to the +18V line?

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scottso
 Post subject:
PostPosted: Tue Oct 23, 2007 8:01 pm 
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Joined: Wed Jul 04, 2007 12:31 pm
Posts: 153
Location: California
Hrm no it was definitely C14. Strange because my +18V was still working. I shorted +48V to ground and then my 48V would only stay at 70V no matter how much I turned the pot. I guess that means I blew out the IC1?

Can I get away with a 50V cap for C14? It doesn't go above 31V even with the pot turned all the way.
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owel
 Post subject:
PostPosted: Tue Oct 23, 2007 8:43 pm 
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Joined: Mon Jun 25, 2007 6:09 pm
Posts: 1261
Location: Music City
Quote:
I guess that means I blew out the IC1?


Yes. It's not regulating anymore.



Quote:
Can I get away with a 50V cap for C14? It doesn't go above 31V even with the pot turned all the way.


Yes.

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scottso
 Post subject:
PostPosted: Tue Oct 23, 2007 9:06 pm 
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Joined: Wed Jul 04, 2007 12:31 pm
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Location: California
Great. All fixed. :) Thanks!
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