DIY Mic Pre Kits, Lunchbox Mic Preamp Kits, Power Supply Kits

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 Post subject: Trouble shooting
PostPosted: Sun Oct 28, 2007 12:52 am 
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Joined: Sat Oct 27, 2007 11:56 pm
Posts: 3
I just got my PSU up and running and have 28V on both outputs. I was wondering if there is a schematic and/or test point voltages to assist in trouble shooting the board. I checked for shorts already and found none. Thanks!



Rock on,
Steve


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 Post subject: Found the schematic
PostPosted: Sun Oct 28, 2007 6:14 pm 
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Joined: Sat Oct 27, 2007 11:56 pm
Posts: 3
So after I posted my question I found the schematic that was included in the shipment. That will certainly help.


Rock on,
Steve


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 Post subject:
PostPosted: Sun Oct 28, 2007 6:47 pm 
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Joined: Wed Jul 04, 2007 12:31 pm
Posts: 153
Location: California
When you figure it out let us know what you did to fix it. It helps build up the knowledge base. :) Good luck!


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 Post subject: Re: Trouble shooting
PostPosted: Sun Oct 28, 2007 6:49 pm 
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Joined: Mon Jun 25, 2007 6:09 pm
Posts: 1261
Location: Music City
steve wrote:
I just got my PSU up and running and have 28V on both outputs. I was wondering if there is a schematic and/or test point voltages to assist in trouble shooting the board. I checked for shorts already and found none. Thanks!

Rock on,
Steve


What kind of transformer are you using?

What's the AC voltage on the secondary side of the transformer?

What's the DC voltage after the rectifier... i.e. before the regulator.

Are you getting the same voltage on both outputs? Sounds like a short.

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 Post subject:
PostPosted: Sun Oct 28, 2007 7:14 pm 
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Joined: Sat Oct 27, 2007 11:56 pm
Posts: 3
What kind of transformer are you using?
The transformer is a 25VA toroidal transformer with dual primary (110/220V operation), and dual secondary. 2U version ordered from FishFish (Awesome transformer BTW)


What's the AC voltage on the secondary side of the transformer?
22V

What's the DC voltage after the rectifier... i.e. before the regulator.
28V

Are you getting the same voltage on both outputs? Sounds like a short.
Yeah Im getting 28 out of both of the regulators. I was thinking its was a short and checked for one last night. I didnt find one but did find this morning that my meter is broken. So I am going to recheck today.
Thanks for the response


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