Quote:
Originally Posted by andy
Does the HV remain constant until the regulator current drops to zero as you increase the brightness? If it doesn't, the HV regulator isn't doing its job. Blooming shouldn't start until the regulator current goes to zero.
If the regulator behaves, but it doesn't produce a bright picture at maximum beam current before blooming the CRT almost has to be bad.
|
the hv stays steady depending on the scene being shown on the screen because white scenes are the worst as during white scenes the hv drops and wont regulate to maintain until the white changes to some other colors. the brightness is always at max, but heres the kicker the blooming is so much worse if i do the grey scale the way it is said to do by putting in service mode and what ever color dont show up i would have to use the bias alittle and adjusting the rgb drives per the sams. this is when the blooming occurs so i have to leave the bias counter and the rgb drives counter in order to get any decent picture, and the white scenes are still a problem setting it up this way. so the result is a somewhat not bright picture although clear its not right. i didnt watch the ma during all of this but this is when it blooms as it seems to when a bigger demand is placed on the crt by raising the drives and or the crt bias, it cannot handle it as it will bloom and pull in on the right side screen. if i turn the brightness down and then turn it back up it does not bloom provided the rgb drives and the bias is fully counter clock.