Hi Guys:
Just received this from Mauri, I4JMY. Thought it a good idea to post
here.
Thanks Mauri!
73 - Tom Hammond N0SS
>From: i4jmy@migate.n8it.AMPR.ORG
>To: n0ss@sockets.net
>Subject: Re: [CQ-Contest] TS-930 Fix
>
> Hi Tom,
>
> In the 80's we have done in my lab a number of repairs of TS930
> digital units, of course we had that "56 points guide" but after
> some time we decided not to use it other than as a guideline, and
> to repair only, often jumpering between components leads leaving
> untouched the board, were effectively defective.
> That boards (up to SN 310XXX) are so defective and delicate, also
> suffering of aging, that any unecessary stress must be avoided,
> otherways new problems add to the existing ones (at the time of
> repair or in the near future) making finally the damage unrepairable
> at a reasonable cost.
> Moreover, not all the problems came from the through holes, but
> often by copper tracks breaks (around components soldering points).
> Generalized resoldering of the through hole points, expecially
> by not thermo-controlled iron solders, I can bet, will cause new
> breaks in most of the digital boards.
> If I were You, to live in peace, I'll warn people about concerned
> risks and expecially NOT to resolder all those 56 points as an
> unconditioned fixing (or preventing) action.
> My experience says this repair shouldn't be done by who is not
> a professional.
>
>
> 73, Mauri I4JMY
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