[Jukebox-list] Cleaning circuit board with DeOxit

[Ron]

Have a close look using a magnifying glass.
This will give you a closer look at the surface to actually see if it is a 
surface problem or the copper trace has been attacked  and is missing.
There are other chemicals to use but you need to weigh up the costs as to 
the replacement value of the board compared to the price of these 
specialized solvents.
Ron from OZ
----- Original Message ----- 
From: "Ian Zapczynski" <ianzap at hotmail.com>
To: <jukebox-list at lists.netlojix.com>
Sent: Wednesday, February 14, 2007 12:43 AM
Subject: [Jukebox-list] Cleaning circuit board with DeOxit


>I have a Rowe MM-1 which more often than not makes incorrect selections. 
>It almost always selects the proper letter, but either it will push the pin 
>for the wrong number or it will just continuously search.  The very kind 
>and helpful Justin S. helped me narrow this down to the number wiper 
>circuit board, which is quite visibly contaminated.
>
> Per his suggestion, I used some DeOxit (at first a 5% solution I borrowed 
> from a friend) on the board, and with this I managed to remove a small 
> amount of the muck.  After letting everything dry, I tested the unit and 
> felt that I had made noticeable progress, but still much of the time I was 
> encountering the same selection issue.  So I bought myself a 100% DeOxit 
> solution with a brush applicator and applied it as directed last night 
> (apply, wait 2 minutes, wipe with lint-free cloth and continue until cloth 
> is clean).  Unfortunately, I was unable to successfully clean off any more 
> of the apparent contamination this way.  I also tried removing the gunk 
> with a pencil eraser to no avail.
>
> To be clear, this "gunk" I refer to seems to not be on the surface but 
> instead embedded in the conductive connectors on the board.  It appears 
> dark grey.  I'm not sure if this is what oxidation looks like or if this 
> is some other contaminant, but it quite obviously exists only in places 
> where the wiper has come in contact with the board.
>
> In any case, it would seem to me that this board is causing my issue, but 
> I don't seem to be getting very far by cleaning it in this manner.   Is 
> there any hope?   Does anyone have any additional thoughts or suggestions 
> on how to get this board in more of a like-new condition?   Or (*gulp*) 
> might I need to resign myself to locating another one in better condition? 
> I'm usually a bit paranoid about breaking things, but in this case I think 
> I've put in about as much elbow grease as this application would allow.
>
> Thanks!
>
> -Ian
>
> _________________________________________________________________
> Search for grocery stores. Find gratitude. Turn a simple search into 
> something more. 
> http://click4thecause.live.com/search/charity/default.aspx?source=hmemtagline_gratitude&FORM=WLMTAG
>
> _______________________________________________
> Jukebox-list mailing list
> Jukebox-list at lists.netlojix.com
> http://lists.netlojix.com/mailman/listinfo/jukebox-list
>