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Old 8th Feb 2019, 3:42 am   #18
Argus25
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Join Date: Oct 2016
Location: Maroochydore, Queensland, Australia.
Posts: 2,679
Default Re: Microvitec Cub monitor model identification and repair

I just had a look at the last color monitor I worked on, the IBM5153, it has a current sensing resistor network in the ground return of the EHT supply, which they use to modify the CRT grid 1 voltage for brightness compensation, but the aquadag is grounded (not returned to the EHT negative).

Also, of note, there would be no need in this monitor to discharge the CRT, because the entire EHT supply has a voltage divider across it that supplies the focus pot and G2 voltage.So it self discharges.
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