Date:         Thu, 30 Dec 2010 23:27:11 -0500
Reply-To:     David Beierl <dbeierl@ATTGLOBAL.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         David Beierl <dbeierl@ATTGLOBAL.NET>
Subject:      Re: Good news for 1.9l T-A ECU owners
Comments: To: Old Volks Home <oldvolkshome@gmail.com>
In-Reply-To:  <AANLkTikdDRpo=tg-9SKFfnHVY=6=Fhik2+BAFC=nv=Jw@mail.gmail.c om>
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At 08:27 PM 12/30/2010, Old Volks Home wrote:
>my way with no further problems.  I've never opened a Bosch or TA ECU,
>so perhaps they are due for inspection sometime soon.

Just be aware most of the solder failures I've seen will not be
visible without a microscope.  By the time they get really really bad
they will, but they may very well have failed electrically - either
an intermittent or a hard failure - before then.  See
http://picasaweb.google.com/dbeierl/SolderFatigue#

I got into this stuff through an industry-magazine article around
1980 with some fascinating photomicrographs, much better than what I
have to show.  Then had some further experience later at a VDT
builder where we had some problems with thermal cycling on a video
drive transistor.

Yours,
d