Alternative Way of Adjusting G2s (25EC58)

[TinCanAlley]

Originally Posted by Electronic M

It's been at least a couple of years since I messed with grey scale on a CCII. Generally on Deltagun CRTs the instructions will say to minimize brightness, flip service switch and turn down G2 controls. If one or more guns doesn't produce a line at max G2 increase bias or brightness range pot to until dark guns produce light at max G2. if neither pot/switch exists in circuit (they aren't always in a convenient/obvious location so check schematic) advancing brightness is allowable. Once all are able to make a dim line bring up red to barely visible, bring up green to make the line yellow, bring up blue to make line white, return service switch and brightness to normal positions and if necessary touch up color drive pots for good white balance.

I am trying my best to trace the setup switch in the schematics, but I think in setup, it disables brightness control. When I bring up the blue line, advancing the brightness control has no affect on its intensity.