[TenTec] omni D display problem...fixed

[Steve Baron - KB3MM]

My father always told me that soldwe was to hold things in place and not be
part of the circuit.

Sounds like TT knew that too.

----- Original Message ----- 
From: "Mike Bryce" <prosolar at sssnet.com>
To: <TenTec at contesting.com>
Sent: Thursday, May 12, 2005 23:29
Subject: [TenTec] omni D display problem...fixed


> thanks for all the notes on trouble shooting the wacky display on my
> omni D
>
> The problem is now fixed.. Here's what happened...
>
> when replacing one of the ICs on the main logic board, two of the
> adjoining pads were connected together.
>
> If you have ever worked on an old piece of Ten Tec gear, you may have
> noticed that during production, all the leads on all the parts are
> smashed down against the pcb. When using the vacuum desoldering tools,
> You have to heat the pad, then pry up the lead you want to unsolder.
>
> when replacing the IC, it looked to me (at the time) that the two pads
> were together.
>
> I found this out when placing the scope on the input to the divider.
> Instead of just seeing the input being squared up, there was a 5ms
> pulse as well. the 5ms pulse came from the shorted pad...
>
> kinda feel foolish...
>
> the radio is almost fixed. the PTO needs a rebuild and the remains of
> several electrolytic capacitors need to be vacuumed out...
>
>
> Mike, WB8VGE
> SunLight Energy Systems
> The Heathkit Shop
>
> http://www.seslogic.com
> http://www.theheathkitshop.com/
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