[TenTec] Paragon 585 troubleshooting

[Vic Klein]

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.

 

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?

 

=Vic=

WA4THR

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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