Gary,
Do these dots turn red in the presence of liquid water or any water?  It 
would be interesting to know how humidity affects such dots.  It is pretty 
humid here in Iowa these days.

Doug Pauls




Gary Crowell <[log in to unmask]> 
Sent by: TechNet <[log in to unmask]>
08/13/2007 10:27 AM
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Re: [TN] Friday NTC - water logged cell phone repair






Convenient thread, I have just gotten a blackberry from a friend that
was dropped into a cup of soda pop - it may require some extraordinary
measures to unstick it.

Also, we noticed recently that when we called in for warranty repairs on
another phone, they asked us to look in the battery compartment and see
if there was a red dot.  The dot is a moisture detection sticker:
normally white, it turns red in the presence of water.  I imagine a lot
of people have been caught wet-handed that way.

I've seen those dots in about half the phones I've looked in, though in
some they may be deeper inside.  They come in various sizes and shapes;
typically about 1/8" in dia.  Made by 3M.

Gary

> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Bev Christian
> Sent: Friday, August 10, 2007 6:48 AM
> To: [log in to unmask]
> Subject: Re: [TN] Friday NTC - water logged cell phone repair
> 
> Well actually the paper is just looking at bare boards, but 
> the work was
> to support was Denny has said.
> 
> Just the act of spilling stuff onto/into your portable device 
> will void
> most warranties.  The problem we have is people don't tell us and want
> us to fix their mistake at our expense.
> 
> So, if you want to fool around with the device after a 
> mistake, it might
> work and it might not or it might work for a while.  We are a Class II
> company and all the parts we buy are not guaranteed to be hermitically
> sealed - thus my questions about non-aqueous cleaning earlier.
> Bev
> RIM
> 
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Dennis Fritz
> Sent: Friday, August 10, 2007 8:37 AM
> To: [log in to unmask]
> Subject: Re: [TN] Friday NTC - water logged cell phone repair
> 
> 
> In a message dated 8/10/2007 3:23:29 A.M. Eastern Daylight Time, 
> [log in to unmask] writes:
> 
> with all  knowledge from u gurus I know it cannot happen as 
> electronics
> is so
> rugged  today. so I open it up, separate the PCBs remove the 
> camera and
> ultrasonic  clean the assemblies in pure IPA. Bake at 75 degC 
> for 1 hour
> and
> its  OK.
> 
> 
> Strongly suspect that Bev Christian (RIM- Blackberry) and others in
> telecom 
> may have strong comments on self repair procedures. 
> 
> Bev will have an interesting paper at next IPC Expo on 
> reverse analysis
> of 
> returned Blackberries, and "CSI - Miami" type analysis of what these
> little 
> electronic marvels get dropped into.  Stay tuned. 
> 
> 
> 
> ************************************** Get a sneak peek of the all-new
> AOL at 
> http://discover.aol.com/memed/aolcom30tour
> 
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