[Uram-rejections] Repairing failed 'Solder Ball' connections.

[webstump+uram-bounces at chiark.greenend.org.uk]

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  Miss out the references to discussions in other groups and employment history.



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> From webstump at chiark.greenend.org.uk Mon Mar 28 21:13:55 2016
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> From: agree2pay4uce at spam.vlaad.co.uk (Paul Cummins)
> Newsgroups: uk.radio.amateur.moderated
> Subject: Re: Repairing failed 'Solder Ball' connections.
> Date: Mon, 28 Mar 2016 21:13 +0100 (BST)
> Message-ID: <memo.20160328211351.3828g at postmaster.cix.co.uk>
> References: <ndbvuk$o9a$1 at dont-email.me>
> Reply-To: paulcummins at tiscali.co.uk
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> In article <ndbvuk$o9a$1 at dont-email.me>, gnuarm at gmail.com (rickman)
> wrote:
> 
> > How exactly does heat to a perfectly good IC cause a solder ball 
> > failure that can be repaired by... applying heat?
> 
> I'm astonished that a poster has sought to attack my post on this subject
> in another place.
> 
> It's a well known fix to "bad" boards to reapply heat to the board to
> re-flow the solder, following a cleaning and re-fluxing of the relevant
> part. 
> 
> IN the case of the boards I discussed (one of which I have here) there
> was a known issue with earlier devices where the CPU was soldered, and
> one or two bad joints would show themselves sometime after 500-750 hours
> of use. The standard process was for the customer to return it under (a
> five year) warranty and it would be replaced without charge, then the
> "faulty" unit would be tested in Bremen. If found to have this fault, an
> attempt at local repair would be made, and if that was successful, the
> device became part of "demo" stock, otherwise it was RTM for replacement
> by the OEM.
> 
> Why this is considered surprising, or unprofessional is a loss to me. 
> 
> I have no doubt, however, that the critic will now be trying to contact
> the company in question to check my employment history, and you may take
> from that comment what you will.
> 
> To bring it back on topic an Igel One makes a perfect thin data terminal
> for Amateur use linked to a Yaesu FT-857D, albeit quite expensive
> compared to a Raspberry Pi.
> 
> 
> -- 
> Paul Cummins - Always a NetHead
> Wasting Bandwidth since 1981
> Please Help us dispose of unwanted virtual currency:
> Bitcoin: 1LzAJBqzoaEudhsZ14W7YrdYSmLZ5m1seZ
> 
> 
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