Date: Wed, 27 Mar 2013 00:01:42 -0500
Reply-To: JRodgers <jrodgers113@GMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: JRodgers <jrodgers113@GMAIL.COM>
Subject: Re: Instrument Cluster Ribbon Repair
In-Reply-To: <CAB2Rwfguhf-=dtnNOu1p+D5_YSk=5LC-+AQpSAXyC69Z3yPpTA@mail.gmail.com>
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Neil,
There are a number of products called "Goop" and some are silicones that
use acetic acid to trigger the curing process. They are corrosive. I
hope you didn't use one of those. You might want to investigate further
the one you used.
John
On 3/26/2013 6:28 PM, neil n wrote:
> hey thanks much Dick.
>
> I tinned the leads but not the copper. Still. Worked out "ok"
>
> Just finished applying "Goop" over things. Hope that also helps
> protect against the potential flux issue you mention (thanks). Image:
>
> https://lh4.googleusercontent.com/-1jzQgwSuIrQ/UVIurkcTL1I/AAAAAAAAHU4/Z5Y3USht3HI/s800/Goop%2527d.jpg
>
> In hindsight, should have soldered wires to all traces. i.e. there's a
> diesel glow plug I'll now not easily be able to use as a CEL light.
>
>
>
> On Tue, Mar 26, 2013 at 3:50 PM, sailingfc @dslextreme.com
> <sailingfc@dslextreme.com> wrote:
>> Neil,
>>
>> I work at an electronics assembly company and we (not me) do a lot of hand
>> soldering. As you already know, getting the copper as clean as possible
>> helps the solder wick properly.
>>
>> Another thing, if you didn't already do this is to tin every surface you are
>> going to solder to. Pre-tin the wires and pre-tin the copper traces. It's
>> a lot easier to apply heat to a single part than it is to multiple parts of
>> different thermal masses. When you actually start soldering, keep heat on
>> the larger thermal mass and bring it on contact to the "lighter" part. You
>> shouldn't have to add too much more solder since the parts are tinned. If
>> you are using an active flux in the solder wire, make sure you wash off the
>> flux after soldering, active flux will continue to etch the copper and will
>> corrode the copper given the right temperature and moisture conditions.
>>
>> Good luck!
>>
>> -Dick Wong-
>> 78 Scirocco
>> 87 Vanagon Syncro
>> 12 Golf TDI
>
>
> --
> Neil n
>
> 65 kb image Myford Ready For Assembly http://tinyurl.com/64sx4rp
>
> '88 Slate Blue Westy to be named.
>
> '81 VanaJetta 2.0 "Jaco" http://tubaneil.googlepages.com/
>
> Vanagon VAG Gas I4/VR Swap Google Group:
>
> http://groups.google.com/group/vanagons-with-vw-inline-4-cylinder-gas-engines
>
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