|
think I may have it.
scope of the collectors of the R,G, B drivers all have distortion that is not present at the base, you can see the humps on both sides of the H blanking.
Base is perfect so has to be in the B+ supply to the collector. looking around there I found an open choke coil that supples the load resistors for all 3 driver transistors. I guess its getting current thru some other path to work at all, but without that choke there is a REAL nasty pulse.
More late.
|