[Coco] [Color Computer] keyboard problems

[paulh96636 at aol.com]

 If the  chlorine in tap  water were the main issue, the water could first be boiled, but use of it would still
leave deposits on the board(s) which could still cause corrosion esp. to fine traces and surface mounted
components.  Worst case senario would be if a device such as a computer or camcorder were dropped in
the ocean - let 'em sink; repair would be virtually impossible (I've seen it happen).     -ph
 
 
-----Original Message-----
From: jdaggett at gate.net
To: coco at maltedmedia.com
Sent: Sun, 7 Jan 2007 3:52 PM
Subject: Re: [Coco] [Color Computer] keyboard problems


On 7 Jan 2007 at 9:02, PaulH96636 at aol.com wrote:

> Would advise against using tap water as a final rinse; used
> demineralised or distilled water; rain water would be okay.  Main
> thing is that tap water likely  has dissolved salts which will remain
> on the board after water evaporates and can cause  shorts and
> corrosion of metal contacts. Again, hard water leaves deposits  which
> can also remain semi-wet in humid conditions;  these deposits can be 
> corrosive.

*********

Main issue is tap water has chlorine in it. Plus several other halogens like 
flourine. 
Hologens,  which chlorine is one, are very reactive with metals to form salt 
compounds on the PCB and is asking for dissaster over time. 

The best solution is to go to Walgreens and buy their 91% isopropol alchohol. 
Don't use 70%. Alcohol is one of the better cleaners of PCBs and contacts. 

james

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