Herbert Graf wrote:
> On Sat, 2007-11-10 at 12:52 -0500, David VanHorn wrote:
>   
>>> BTW, there is one MORE source of connector problems: surface-mounted
>>> connectors. Instead of being thru-hole
>>> mounted, each post is tacked to a surface pad. These  ARE _definitely_
>>> criminal.
>>>       
>> I agree, I've repaired a number of these for people where the solder
>> joints that held the connector to the pcb fatigued and failed over
>> time, a failure mode that you just don't ever see with thru-hole.  In
>> fact, I designed this failure mode into a system, where impact that
>> couldn't be handled by the case flexure was designed to shear the
>> connector from a plug-in board rather than cause damage to the
>> motherboard that would have been a much more difficult repair.
>>
>> I've seen the failures in connectors that didn't have much force at
>> all applied, so I'm saying that all external interface connectors must
>> be thruhole.
>>     
>
> What about SMT connectors that have through hole mounting points, either
> through hole solder tabs or holes with nuts and bolts holding the
> connector to the PCB? Just curious since so many connectors these days
> have pitches way to small to do through hole.
>
> Thanks, TTYL
>   
If you have a way to relieve the pressure of removal then you should be 
OK, I think.

--Bob
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