To Other Geo 20-20 users,

We too had to do this back in January. I feel it is probably a design
fault, which Europa may like to address in other machines. Perhaps we could
think of starting up a web page where all problems are logged in for each
machine/location and common problems and solutions can be identified and
noted. Maybe this is best done independantly of Europa, or maybe it should
be Europa's responsibility if they want to further their customer service....

Karyne

At 15:47 24/08/01 -0400, you wrote:
>Hi Myles,
>
>We kinda had a similar problem with our 20/20 and after contacting the
>guys at Europa, they suggested that the problems can be fixed by changing
>three capictors on the main source board, the board that supplies power
>to the source and filament (at the right handside panel of the 20/20).
>One of these capacitors controls the eV's  and it apparently failed.
>The best way to go around it is to change the
>three of them with a higher rated item. The actual caps are blue in
>color, at the center of the board almost (each under a black bracket),
>marked as C283, C290 and C161 rated for 22uf, 63Vdc. Needless to mention
>that you have to shut the electronics off at the back of the instrument
>(no need to shut down the whole system) before removing the board. In
>case you need more help, let me know.
>
>Nabil Saad
>Brenna Lab.
>Cornell University
>

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Dr Karyne Rogers
Stable Isotope Laboratory Team Leader
Institute of Geological and Nuclear Sciences
PO Box 31-312
Lower Hutt
New Zealand

tel +644-5704636
fax +644-5704657
email [log in to unmask]
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