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Watchguard Firebox SOHO 6 Power supply info needed

Posted on 2004-09-25
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Last Modified: 2008-03-17
I lost the power supply for my Watchguard Firebox SOHO 6. I got another on thats a 12volt and is 1 amp but it has the ability to change the polarity. The SOHO doesnt say whether the tip is positive or negative. I dont want to harm it so does anyone know this info? Maybe the original power supply says. I cannot find much info on the web. Thanks!
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Question by:brianrafter
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by:Tim Holman
ID: 12159536
You won't hurt it by trying....  there will be diodes and the likes to prevent damage.
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by:brianrafter
ID: 12208655
The pin is positive. I plugged it in with the pin negative, there was a puff of smoke and then it powered off. I opened up the unit and saw a diode had melted off the circuit board. I soldered on a new one, changed the polarity on the PS and I am back in business.
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Tim Holman earned 500 total points
ID: 12259442
Nice one, although shame about the diode !
If for any reason polarity is reversed (ie physical damage to the cable) then this sort of thing SHOULD be protected against a little more readily...  they evidently need bigger diodes.
Thinking back a bit, you could have probably taken the box apart and worked out which rail was connected to which part of the connection.
But again, this sort of information should be published freely by Watchguard, as I'm sure you're not the only one with an OEM power supply for these units!
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