Electronics > Repair
ADVANTEST R9211B
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stfjohn:

Hi everyone. My Advantest R9211B FFT analyzer suddenly presents this message when turned on: "Fatal Switch - illegal state 0 in main - not installed!" . Can anyone help me?
Thanks.
m k:
Just a guess

Different models have different options that are so close to each others that there are switches selecting what is present.
Now one of those switches has failed, so wrong option is indicated.
stfjohn:
Thanks for your input. Unfortunately the device doesn't just not install an option: it just doesn't work! That message appears on the monitor and everything stays off!
m k:
Hardware option.
Since one switch has a wrong value it doesn't recognize its guts.

During a boot procedure it tries to initialize all parts it has.
Wrong switch value indicates that it includes a part X.
But initialization fails because the actual part is Y.
stfjohn:
Ok. Since I don't have the wiring diagrams (I asked Advantest, but they told me they are not available to provide them, not even for payment.... 40 year old device: will it be a state affair? Mah!!), what can I do concretely?
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