From: "Jim Shorney" 
Subject: Re: [Drakelist] New TR-7A - SOS


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On Sat, 4 Jan 2003 13:47:40 -0500, Al Parker wrote:

>

>    Maybe somebody else can chime in with more specifics, my mind needs to
>be refreshed often to retain stuff.  I"ll get the books out if you need more
>help.


Now that I think back on it, my TR7 had a similar problem.  I resolved
it by resoldering things on the display board (in stages) until the
problem went away.  I started with the connector pins, then progressed
to ICs and such.  I also checked connector soldering on attached
boards, and even the backplane (motherboard?).  ISTR that the backplane
board looked to be wave soldered, and this can often lead to less than
optimal filleting (solder too thin) of the solder connections around
pin connectors.

Now I need to do the 'bumped pots' alignment and fix the 23kc spur
disease...

- --
Jim Shorney      -->.<--Put complaints in this box
jshorney{at}inebraska.com
nu0c{at}amsat.org
Ham Radio NU0C
Lincoln, NE, USA
EN10PT
http://incolor.inetnebr.com/jshorney/
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