[Coco] Best way to clean up FD501 controller board.

[William Schaub]

Did you look at the pictures of the board before I cleaned it? I think 
that grime might have been somewhat conductive. some of the pins on some 
of the chips had corrosion on them.
it looks like some sort of brown grime dripped into the vent on the 
controller while this thing was in storage.  I'm very glad the 
connectors are gold  on this particular board.


Mike Pepe wrote:
> The FD-501 controller pins are indeed gold plated- the only Tandy
> controller to do so.
>
>   
>> -----Original Message-----
>> From: coco-bounces at maltedmedia.com [mailto:coco-
>> bounces at maltedmedia.com] On Behalf Of Bob Devries
>> Sent: Wednesday, March 12, 2008 3:45 PM
>> To: CoCoList for Color Computer Enthusiasts
>> Subject: Re: [Coco] Best way to clean up FD501 controller board.
>>
>> There's a good chance that you fixed the problem when you cleaned the
>> edge
>> connectors. They are notoriously flaky and prone to bad connections.
>> They
>> would have been better if they'd been gold-plated, like the Disto
>>     
> ones.
>   
>> SIGH
>>
>>
>> --
>> Regards, Bob Devries, Dalby, Queensland, Australia
>>
>> Isaiah 50:4 The sovereign Lord has given me
>> the capacity to be his spokesman,
>> so that I know how to help the weary.
>>
>> website: http://www.home.gil.com.au/~bdevasl
>> my blog: http://bdevries.invigorated.org/
>>
>> ----- Original Message -----
>> From: "William Schaub" <wschaub at steubentech.com>
>> To: "CoCoList for Color Computer Enthusiasts" <coco at maltedmedia.com>
>> Sent: Thursday, March 13, 2008 8:39 AM
>> Subject: Re: [Coco] Best way to clean up FD501 controller board.
>>
>>
>>     
>>> I didn't unsocket the chips as they looked pretty good. I did take
>>>       
> the
>   
>>> toothbruch with alchohol to teh edge connectors as well. I pretty
>>>       
> much
>   
>>> scrubbed every inch. and its comming up now and the drive reads and
>>>       
>> writes
>>     
>>> fine.
>>>
>>>
>>> Mark McDougall wrote:
>>>       
>>>> William Schaub wrote:
>>>>
>>>>         
>>>>> I just Gave this a try, all I could find was 50% isopropyil
>>>>>           
> alcohol
>   
>> It
>>     
>>>>> seems to have worked quite well. I'm waiting for the alcohol to
>>>>>           
> dry
>   
>> off
>>     
>>>>> and then I will give it another go hopefully it will work this
>>>>>           
> time
>   
>>>>> round. otherwise I will be wanting a new controller  I would be
>>>>>           
>> glad to
>>     
>>>>> give the non-working board as a source of parts.
>>>>>           
>>>> What exactly are you cleaning? Just a general clean of the PCBA
>>>>         
>> surface
>>     
>>>> won't do a lot...
>>>>
>>>> You need to remove the socketed chips and clean the pins, and the
>>>>         
>> sockets
>>     
>>>> if you can. Also paramount are the card-edge connectors on either
>>>>         
>> end of
>>     
>>>> the board. Anything else is little more than cosmetic...
>>>>
>>>> Regards,
>>>>
>>>>         
>>> --
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>>> http://five.pairlist.net/mailman/listinfo/coco
>>>       
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>>     
>
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