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Hi,

Tube is in underpressure, so the voltage over the passbank is to high.

Lower the input Voltage 5% or let the tube refill.

Check the anode side of the tube if there is ae hot spot it will kill the tube by time, because the underpressure.


Regards Stefan

It was always connected @208V here ...

Hi,
I have Argon laser Spectra-Physics model 2020.
Light is emitting but power supply is noisy and it is coming up with error code 59
I am not sure how stable light output is.
Manual describe that passbank voltage is out of regulation!!
If you have some suggestion or schematic it will be greatly ...