Motorola Quasar Part needed

[ctc17]

Generally this is the way to set it up.

With a picture and the color at minimum (black and white)
Turn all 3 screen controls down (counter clockwise)
Turn the bias all the way down ....
Flip the switch to service
Advance the screen controls one at a time to get a dim white line, if you cant get a line or cant get one of the 3 color to show. (lets say you get a dim blue and green but cant see red, back off green and blue and increase the bias till you see a dim red line leaving the red screen at max then go back and advance the green and blue to get white.)
Put service switch back to normal now adjust the drive controls to get a fairly consistent black and white picture through a range of brightnesses.

Let the set warm up for at least 15-30 minutes before you do this.

You can get a rough idea of the condition of the crt doing this too. A strong crt will show all 3 lines with the bias at minimum and the screen controls around half way. If you have to crank the red screen all they way up and the bias all the way up to barely get a red line or you cant even get red with everything at max good chance the crt is very weak.

I have a motorola here with a dead crt and all 4 controls are at max, all the color are there the picture is very dim and washed out. Generally you get color smearing/trails/blowouts.