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Re: Power switch flickering - problem/question

2009-02-28 by Karl

Hi Matt,
I would agree with Envia. The flickering of the neon bulb in the power 
switch has naught to do with any other hardware problems. The bulb is 
connected to the line voltage right at the switch and is isolated from 
the rest of the circuitry by the power supply transformer.

However, if when you physically position the xpander differently and 
you have tuning problems, this points to something  loose in the 
circuitry. You might try opening it up and pushing all the chips down, 
and/or any connectors feeding to the voice boards. Statistically, 
tuning problems usually point to failed caps or cold solder joints.  

Also, Envia's cautions about static electricity is very good advice. 
The humidity is so high here in St. Louis I don't 
usually have problems with this.  

- Karl


--- In xpantastic@yahoogroups.com, "mattvrazo" <vrazomatt@...> wrote:
>
> --- In xpantastic@yahoogroups.com, "envia94" <akva@> wrote:
> >
> > I have had a similar flickering light on my fridge for year. I think
> it is not serious in case of an 
> > Xpander either. That's probably a property of the bulb itself due to
> some manufacturing 
> > tolerances. Although stable LEDs were invented, they were not used
> in Xpanders, if I'm not 
> > wrong:
> > 
> > http://web.mit.edu/invent/n-pressreleases/n-press-04LMP.html
> >
> 
> Ok, that's good to know...  it's just odd that it seemed correlated
> with how well the filters tuned.. It had me hesitating about even
> turning it on, but maybe that's been overcautious.
>

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