[time-nuts] Tektronix Type 602 manual

[Mark Sims]

Crank up the intensity control,  turn the unit on,  wait a minute or so and turn the unit off (preferably in a dark room).If you can see any flash or light on the screen,  your power supply is (mostly) OK.  If you see no sign of life,  you probably have a power supply problem (most likely the high voltage).
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