No Horizontal Sync

[Jonathan]

Originally Posted by Giulio Maiocco

Hello Jonathan,

I just hope your "503" capacitor is a typo, as if this is what you used to replace the original 0.015uF capacitor, you are way off, 503 means a 0.05uF cap!

Cheers

Giulio

Yep, it was just a typo. 153 is in there. In the mean time I replaced some drifted resistors in the horizontal and vertical section. Only ones that were way off were the the two 6.8k resistors, drifted to 8k. I replaced those as well as a few others. With adjusting of the horizontal oscillator transformer and horizontal hold, I can get stable horizontal sync. But, the the picture has the vertical bar, looks like the sync pulse, as well as a horizontal bar showing the VBI. Looks as if the picture is not "aligned". The picture will gradually roll from bottom to top, and I need to keep adjusting horizontal hold to keep the picture from rolling sideways. After it warms up for a bit, the sync is pretty stable, but rolls sideways occasionally, and will still slowly rolls from bottom to top. Attached are pictures. Any suggestions? The 6AL5 works and gets hot, all the tubes in the set are hot.

[jeyurkon]

If you're having trouble with both vertical and horizontal sync being unstable you probably need to look earlier in the sync section.

Check the other 6AL5 - V114, R149, V118, V119, V120 and associated components.

John