[TenTec] Paragon 585 troubleshooting

[Steve Cochrane]

I had similar problems but they went even beyond what you are experiencing. I changed out the Logic Board and all those gremlins went away. My suggestion is to find a working replacement Logic Board or if you like troubleshooting ICs have fun trying to track down the one causing all the problems and then finding a suitable replacement. 

Steve w7jsc

-----Original Message-----
From: TenTec [mailto:tentec-bounces at contesting.com] On Behalf Of Joe Hetrick
Sent: Thursday, April 27, 2017 5:07 AM
To: Discussion of Ten-Tec Equipment <tentec at contesting.com>
Subject: Re: [TenTec] Paragon 585 troubleshooting


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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