RE: AMMRL: Tuner Interface No Display
Ulrich Haunz (Ulrich.Haunz@uni-konstanz.de)
Fri, 15 Feb 2008 12:37:44 +0100
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Hello,
at the end of last year, I had such a nice hiccup or hiccough produced
in our INOVA 400 system.
I don't know how it started ... suddenly the small platform in the lock
display window moved through
the window and locking was impossible ... so shimming and measuring.
The system went directly wrong and crazy. What was the obstical base or
the obstacle?
The mashine is used in walk on mode ... so everybody has the chance to
do this.
I already seen this problem, announced from Dr. Barchi. Sometimes the
maschine healed itself.
Now we got a big probelm ... the service engineer came - I tried to
replace the lock controller -
nothing helped ... it took 10 minutes ... and then he got the fault.
This nice channel switch was
set up on a channel not on zero and the system was rebooted and this
created these nice faults.
I have seen sometimes ... not often ... the matter, switching back the
channels or switching to
channel 1 the light does not start or it takes a time ... or I have to
switch back or forwards and
the system starts the tuning mode. Qtune is a different way to start
tuning and matching this
overrules the channel selections with the channel wheel and you hear
some relais clicking, like
when you click the channel wheel.
Do you have noticed ... you can also take channel 9 to do tuning and
matching for the observation
channel - channel 1?
Quite interesting to hear about your problems ...
Yours sincerely
Ulrich Haunz
> Hi All,
>
> Out of the blue, while trying to perform probe tuning on a Varian INOVA
> 400 MHz spectrometer, the tuner interface LED display does not switch on
> when any number is toggled into the Channel wheel. If I run qtune, the
> display comes on and I can adjust tuning. Exit qtune, put the probe
> output on the tuner interface and click a channel---nada. All other
> systems are "go"--Anyone ever see this happen?? Potential causes, fixes?
>
> Cheers
> Joe
>
> Joseph J Barchi, Jr. Ph.D.
> Senior Scientist and Head, NMR Unit
> Laboratory of Medicinal Chemistry
> National Cancer Institute, Frederick
> National Institutes of Health
> Bldg 376/209
> Frederick, MD 21702
> 301-846-5905 (VOICE)
> 301-846-6033 (FAX)
> barchi@helix.nih.gov
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