Video Height Adjustment

Hi,
Just tonight I replaced the adjustment pots on the video board on a Lisa. However, now I am unable to get the height adjusted properly. With the Height POT adjusted as far counter-clockwise as it can go, the video appears stretched out vertically, off the top and bottom of the screen. I used a 100K ohm POT for R22. (The schematics on the internet list this as 200K, but the part I took off was 100K)

Is there some sort of coarse height adjustment somewhere?

Previously, the video worked OK, though it would lose vertical hold periodically.

5V is currently measuring 5.13V. I have "H" ROMs and the standard Lisa video ROM.

Any ideas?

-Blair

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. Received on 2015-07-15 16:43:12