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HV is measured at "0 Beam Current" (black screen) this is when the guns are cutoff. This tells the technician how much HV the system can provide and should be able to reach spec. It is NORMAL for the HV to fluctuate a bit during brightness swings, if its severe- check the setting of the screen and drive controls that they are not too high- also as suggested monitor the boost.
Enjoy!
Kirk
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KStanki@aol.com
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