|
you could try this
brightness all the way down
service switch in service mode
advance screen drives one at a time to produce barely visable line
if any color can not produce line advance bias pot just until it does
adj all drives for barely visable line
back to normal mode
advance brightness pot just until normal viewing brightness
monititor HV and see if its holding.
if the above works then perhaps there is a problem with either:
brightness pot
grid emissions on video out.
check the plate voltage of the 6AW8 2nd video amp pin 3 per sams 30v with no signal present.
|