[TenTec] Paragon 585 troubleshooting

[Joe Hetrick]

On 27 Apr 05:55, Vic Klein wrote:
> Do a search in the archives here for Voice Board. There is a Ten Tec mod to
> the voice board to install a diode to prevent the battery from running down,
> while boards that were originally in Omni V and VI radios may not have had
> that. You can test by just removing the board for a while to see if your
> battery stays up.

Yea, that's on the list, but, the issue at the moment is that regardless (with supply voltage on, rig off, fully charged backup battery) memories/etc are not retained if rig is powered off.

> 
>  
> 
> I gather you are aware also there was a later revision to the Paragon that
> provided a charging voltage for NiCd batteries, which could cause a problem
> with Alkalines. Are you saying you see 12v on the battery terminals when the
> rig is on?

Yes; I see shack supply voltage levels on the 9V terminals.  This seems to be whats expected (but somebody could confirm..) based on something I ran across somewhere.  This rig should have the charging circuit.  Even if it doesn't, the fact that battery backup stopped functioning is annoying, at best.

Thanks,

Joe

KC0VKN

> 
>  
> 
> =Vic=
> 
> WA4THR
> 
> ----------------------------------------------------------------------------
> ------------------
> 
> To:                   tentec at contesting.com
> 
> Subject:            [TenTec] Paragon 585 troubleshooting
> 
> From:               Joe Hetrick <jhetrick at bitjanitor.net>
> 
> Reply-to:          Discussion of Ten-Tec Equipment <tentec at contesting.com>
> 
> Date:                Wed, 26 Apr 2017 18:15:02 -0500
> 
> List-post:          <tentec at contesting.com">mailto:tentec at contesting.com>
> 
>  
> 
> 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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