silvertone roundie

[ctc17]

The problem is the brightness control has way to much range and is over driving the video out.
Check r62 r64 and verify the brightness pot is not open

[timmy]

ok well i will close this thread by saying i am done with this silvertone as i just lowered the brightness readjusted the rgb drives and no more blooming with the bias up alittle to account for the weakest gun,RED and the whites are white now and no hv drop with whites. so i checked the brightness control pot and its right on at 250k and r62 and r64 both good as well as other resistors around the video output tube so in finding nothing else wrong here all i really did was lower the bright a touch so if this is what it took to improve what was wrong here well then i am going to leave it and take advantage of the fact that these sets had 10-20 or maybe 30% built in so if i am using a 10% leeway here well thats why they had this high of percentage, for errors because these sets were far from perfect so im happy with it now. well what more can i say,lol,lol...

[miniman82]

Remember also that these old sets will never be as bright as a modern one, I find that people overadvance the brightness control on a regular basis then wonder why the picture blows out. A weak tube will make things worse, so if you don't plan to get a new CRT I'd live with the reduced brightness.

[timmy]

ok, sounds like a possibility and i will get to it but i am certain in the beginning i went nuts checking everything and i do remember that resistor, its red and im sure i checked that one also. thats something like a 3-5 watt resistor. thanks davewm for that info, ill get on it. i just took a look at the schematic and there is 2- 5600 ohm resistors and a 2700 ohm so ill just chect them all as they are power resistors.

[DaveWM]

I am not sure you can test it in the circuit, so the best way to check is the voltage test at pin 7.