ctc12 clone beam current

[timmy]

ok ill do the resistance check on 12by7 per the sams, and ill run the set and monitor pin 2 voltage at the tube while lowering and raising the bright pot and note the differences. just want to make sure i got this, lol, lol.....

[DaveWM]

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.