Problem with the Sonora

[Eric H]

Hi Bill, it looks like one picture reversed and split.

I posted the schematic here:

http://www.vintagetvsets.com/images/sams1.jpg

http://www.vintagetvsets.com/images/sams2.jpg

That is the entire Sams for this set, one sheet, no pictures or parts diagrams!

It uses a 6SN7 oscillator but I don't think it is a synchroguide system as there is only one slug for the frequency.

At first I was having problems getting the horizontal to lock in at all, I had about 4 images side by side.
I found resistor R90 had increased from 220k to 320k so I added another resistor across it to bring it back down.

That helped but it still was out of range so I added another .0033 cap across the horiz frequency coil (it calls for a .0039 and I only had a .0033)

this enabled me to get it to lock in with only one split picture. I then went back and replaced those caps with a .001 and a .003 in parallel for a total of .0043 across the coil, I figure this is close enough but i still have the split.

The horizontal phase det seems to be split between the 6T8 and the 6AL5 ? I did find that pin 5 of the 6AL5 has 10v where it's supposed to be 3.2v. Both tubes have been subbed as has the 6SN7.

Eric