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Hi
I never really paid much attention to that part of the circuit as no problem with it..It's a very poor AGC system for sure...Make sure C19,30uF in the AGC circuit is ok or you might end up with some video modulation on the AGC line.
Playing with mine just now on a strong signal the video can be "moved" a lot within the screen by adjusting the normal line hold control at the rear.If it's
almost losing lock one one max setting that black curvy part as in your picture appears on the right side.Increasing the manual gain control (on a strongish signal anyway) forces the line oscillator to have a wider pull in/lock in range.
Hugh
Last edited by Mr Hoover; 10-08-2011 at 03:11 PM.
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