Picked this scope up not working at the local electronics store in hopes of bringing it back to life. All of the the indicators, graticule illumination, and various lights work when it is powered on. However, there is nothing on the display. I'm assuming the problem lies in the HV supply since all of the low voltage rails check out. I did notice that the neon lamp on the voltage multiplier board looks a bit odd. I'm curious to know if neon lamps can fail, and if this could potentially be the culprit for the lack of high voltage.
Service Manual here: http://w140.com/tekwiki/wiki/422
The lamp looks like something splattered inside, the regulator board has a neon lamp too, but it is clean and clear inside.
Service Manual here: http://w140.com/tekwiki/wiki/422
The lamp looks like something splattered inside, the regulator board has a neon lamp too, but it is clean and clear inside.
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