[rescue] Motherboard cleaning..

[Barry Callahan]

If there's still any gunk on the boards that you'd really like off, a firm-bristled toothbrush with some sort of rinse, even just under the faucet can do wonderful things. or use the alcohol. 

Dentists are all about how you should use a soft toothbrush so that's what most of the store shelves are full of, but most places carry at least a few firm ones

Christopher Purdy <escher.beretta.2112 at gmail.com> wrote:

>Just an update - I pulled the board and video card last night and did
>the
>wash... much better, but still some traces...
>
>I shook both out until no more water was coming from the ports and then
>went nuts with the alcohol... then shook most of that out..
>
>Both boards are drying since last night... I'll likley bake them at
>around
>125 tonight for a while to ensure the drying and give it another day or
>so...
>
>
>On Thu, May 16, 2013 at 2:30 PM, Mark Brown <sunrescue1 at marknmel.com>
>wrote:
>
>> On 5/16/2013 12:36 PM, Barry Callahan wrote:
>>
>>> We actually have a dishwasher in our shop for the express purpose of
>>> washing PCBs, post assembly. In our case, they're cleaning excess
>flux and
>>> removing soldermask paste. (for preventing vias from being soldered
>when
>>> using a wave-solderer) They use rubber bands to hold the boards in
>place so
>>> they don't get jostled around.
>>>
>>> If the board is really bad, you might put it in for a full wash +
>rinse
>>> cycle ** DO NOT USE DETERGENT ** and use the high-temp wash & rinse
>>> settings if your dishwasher is so equipped.
>>>
>>> The alcohol bath may not be a bad idea, but it's not something we do
>>> here. To dry out the boards, we actually stick 'em in an
>environmental
>>> chamber and bake 'em at ~60 celsius (140 F) for a couple hours. Your
>oven's
>>> "warm" setting would probably work just fine.
>>>
>>>
>>>
>>>  I used to work with a fella that worked at Honeywell (Keyboards). 
>I
>> think he was a line manager for the electronics side of the keyboard.
>>  There was a quality issue with the boards coming from that plant and
>I
>> seem to recall the discussion was around cleanliness. (our
>conversation
>> about this was over twenty years ago...).   The remediation was to
>install
>> a dishwasher on the line - and that was the solution to the problem. 
>I
>> figured it was for the reasons listed above by Barry.
>>
>> And to the OP (Christopher - I think....) , don't be in a hurry to
>fire
>> the system back up after the wash cycle.  Put it on the shelf for a
>month
>> and forget about it for a while until is is most certainly dry.
>>
>> Good luck!  Let us know the results....
>>
>> /M
>>
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>>
>
>
>
>-- 
>Christopher Purdy
>www.promethean-visions.com
>_______________________________________________
>rescue list - http://www.sunhelp.org/mailman/listinfo/rescue
>
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