Question about Uniden UM525 ES Series VHF Radio with Hailer

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My Uniden UM525 is blowing fuses the instant I plug it in. I don't know what happened to it but I'd like to fix it. If anyone has any ideas I'd love the assistance. Thanks in advance,

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Hey Marked,

First check the diode in the B+ line . Probably it is shorted due to a reverse polarity connection.

Take it out and test without the diode if it works replace it diode.

Good luck.

Posted on Oct 26, 2010

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Posted on Jan 02, 2017

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Need schematic for a uniden es um525.


Need more information. Which channels don't work? Not all channels are authorized. Typically, the radio will not fail in such a way to allow some channels to work but not others.

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1 Answer

Um525 service manual


Unfortunately, in my experience Uniden will not part with their service manuals cheaply. Perhaps if you contact them directly you may be able to get some joy.
Link to owners manual is posted at the link below, with contact info on the last page
-Steve


http://www.uniden.com/pdf/UM525om.pdf

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First to try is get the exact fuse used (buy a pair) and see what happens.

beyond that if secondary side (when set is turned on) have an expert look at the set.

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I have a Uniden 525 fixed mount 2-way VHF radio. It has power and picks up weather with the shakespeare antenna. However radio checks have failed and i don't receive anything either. The antenna's tip is...


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Mar 28, 2011 | Uniden UM525 ES Series VHF Radio with...

1 Answer

My UNIDEN UM525 receive only near and strongly stations


First, check your antenna, could have been struck by lightning or corrosion could be setting in, if it's corrosion you would not be able to see it. Before going into your radio, try the radio with a different antenna. You never mentioned weather the radio are transmitting or not, knowing this the technition would have a better idea where to check for the problem. Good luck.

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