Admirial 30A1 white vertical stripe

[Electronic M]

Originally Posted by Kevin Kuehn

Hmm. In the second picture we're seeing the horizontal blanking bar on the right-hand side, which could indicate the whole picture is being scanned but not in perfect sync with the TV's horizontal frequency. That being the case, if he moves the picture to the right with the horizontal control, we may not see any horizontal blanking on the left-hand side? I guess in theory the horizontal blanking bar should be equal width on both right and left sides if the horizontal oscillator is in perfect sync with that of the signal it's receiving?

The horizontal AFC detector (and or hold pot setting) can be off far enough to sync such that active video is present in the retrace creating a foldover look...A worthwhile problem to rule out early.

[Kevin Kuehn]

Originally Posted by Electronic M

The horizontal AFC detector (and or hold pot setting) can be off far enough to sync such that active video is present in the retrace creating a foldover look...A worthwhile problem to rule out early.

Agree. The problem is AFC can be so effective that one can't get the horizontal hold control to shift the picture enough without disabling it. I have my Emerson 698 on the bench, which when wave shape is adjusted correctly, the hold will only budge the picture about an 1/8" in either direction, which is the goal with AFC. The Admiral 30A1 AFC may not be so aggressive.