Greetings from Louisiana!

Working on a Tektronics SC503 that still has a few issues. I got the power supplies sorted out and I am able to finally see a trace on the CRT. Its bright and beautiful and it looks like the CRT is in great shape. But on to the next issue...

The Channel 1 trace is located at the top 1/4 of the crt. The Channel 2 trace is fine! Its a vertical issue, Where should I start looking. The manual doesn't have a trouble shooting section for that...

Regards,

Barry

It started working. Not sure, probably an intermittent problem.