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Re: [TenTec] Paragon 585 troubleshooting

To: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Subject: Re: [TenTec] Paragon 585 troubleshooting
From: Dukes HiFi <dukeshifi@comcast.net>
Reply-to: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Wed, 26 Apr 2017 21:50:22 -0500
List-post: <tentec@contesting.com">mailto:tentec@contesting.com>
I have a parts Paragon if you need anything.

All but the synthesizer is good.

Gary


> On Apr 26, 2017, at 6:15 PM, Joe Hetrick <jhetrick@bitjanitor.net> wrote:
> 
> Hey folks,
> 
>  I recently acquired a 585 that has some troubles.  When I received it was 
> suggested I replace the 9V internal battery to revive the memories and such.  
> Upon inspection I discovered that the 9V hardness was corroded away due to 
> the leakage of the 9V nicd in the rig, and there was a great deal of 
> corrosion on the board.
> 
>  Knowing I'd have to tackle the damage to the board and a handfull of IC's at 
> some point, I made a note and dropped in the new nicd cell.
> 
>  Rig worked fine for a couple of weeks, then, the cell ran down.  I replaced 
> it with an alkaline, which I had on hand, knowing the danger and made a note 
> to get a new nicd.  That too ran down in a couple weeks time.  I assumed that 
> with the first rechargable I put in, the charging circuit must be damaged 
> from the previous battery leakage.
> 
>  At this point, I had another charged nicd to replace the alkaline with and I 
> put it in to discover that memory status wasn't restored between power 
> cycles.. So, I left the nicd in, rig running for a day, and then left the rig 
> connected to live power for another day.  No change.  Checking the nicad 
> shows a charged battery with 9V nominal. 
> 
>  If I check the voltage at the 9V connector, I see supply voltage, so, 
> something else is amiss.
> 
>  I think I have two issues: damage to the main board due to cell leakage, 
> likely leading to the second issue.  Looking around, I'm assuming I'm not the 
> first person to have one of these with damage of this nature--what have 
> peoples experiences been cleaning these up and rehabbing them?
> 
>  The run-downs are also interesting, and i see that there was a mod (a 
> description of the symptom, but not the mod itself) where the voice board 
> would cause the battery to drain; how can one tell if that mod has been 
> performed, and, what exactly is it?
> 
>  Anything else anybody might add I should look for?  Rig has the Geihl chip 
> in it, and, everything else seems to work OK, outside of the obvious damage 
> and issues with the thing keeping its wits between uses.
> 
> 73 
> Joe KC0VKN
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