Hello, I need some advice on a working portacolor all tube

[andy]

I have a scan of a service manual to a portacolor if you need it. It's a more recent model than yours which uses a different CRT that has a focus pot, but otherwise it should be the same. You should be able to improve things a lot by doing a proper gray scale adjustment and changing the focus tap to the bes setting. These sets are always wayyyyyy out of adjustment when I get them. Don't expect a perfect picture. These always produce a washed out blurry picture. Be sure to replce the big ceramic cap near the horizontal output tube.