From: "Jim Shorney" 
Subject: Re: [drakelist] TR7 Display problem


"Jim Shorney"  made an utterence to
the drakelist gang
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Hi Bud,

On Thu, 10 Feb 2005 16:02:04 -0700, sebdesn wrote:

>Checked +10v and +5v on parent board as ok. In rcv +10T
>is .386v and +10R is 0v.
              ^^^^^^^^^^This is a definite problem. Investigate this
first.  

> Ps board  26v dc reg is 23.2v. The -5v dc out of the power supply board
>is -3.5v

I don't recall specifically when I repaired mine, but this seems low. I
would replace all the electrolytic caps on this board as a preventative
measure, at least. When they go bad, strange things can happen. Use
good quality caps rated for 105C temperature.

Beyond that, I would recommend searching the Drakelist archives,
various display problems have been covered before in good detail.

73

Jim


-- 
Jim Shorney      -->.<--Put complaints in this box
jshorney (at) inebraska.com
nu0c (at) amsat.org
Ham Radio NU0C
Lincoln, NE, USA
EN10ps
http://incolor.inetnebr.com/jshorney/

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