Re: [Gumstix-users] Power Problem

[Mark A. <m_a...@co...>]

mikef wrote:
> Hi,
>
> I appear to have a problem with the following setup.
>
> gumstix verdex XM4-bt
> netCF-vx
> consoleLCD-vx
> Samsung™ 4.3" LCD panel
> 4.0 volt power adapter
> screws and spacers
>
> Whenever I plug the power supply into either the netcf or consoleLCD cards the boards do not power up until I squeeze the whole assembly.  The assembly powers up and appears to work normally.
>
> After the assembly powers up I do not touch the assembly or power connection on the assembly and unplug the power supply form the wall outlet.  When I plug the power supply back into the wall outlet the assembly does not power up.
>
> What could be the problem?
>
> The assembly should power up simply by inserting the power connector into the plug on either of the boards.  Correct?
>
> How soon should the LEDs come on?
>
> Any insight would be appreciated.
>
> Regards,
> Mike
>
>
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>   
Hi,

although you listed the spacers and screws, are they  installed 
sufficiently between each of the boards so they are being held parallel 
to one another when the connectors are firmly pressed together?  Also 
you might want to check to make sure there is no dust in the 
connectors.  I've not had this problem but have not used this exact 
combo of boards.

One other issue is that the consoleLCD-vx page suggests using the 5 volt 
supply instead of the 4 volt one.  So if you plug in power there, you 
might want to try a 5 volt unit instead of your 4 volt one.   The issue 
is that the Net CF card recommends the 4 volt supply.  I am not certain 
if each board has its own power regulator or not.

So my question is - does the 92 pin connector on the Net CF card pass 
the raw voltage from the power supply jack, or does it pass regulated 
voltage. I don't have the schematics handy to see that.  Anyone else know?

just some ideas.

'mark