Video Height Adjustment

From: Blair Aakre <baakre_at_email.domain.hidden>
Date: Wed, 23 Apr 2008 21:34:32 -0500

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?


You received this message because you are subscribed to the Google Groups "LisaList" group. To post to this group, send email to lisalist_at_email.domain.hidden To unsubscribe from this group, send email to lisalist-unsubscribe_at_email.domain.hidden For more options, visit this group at

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

This archive was generated by hypermail 2.4.0 : 2020-01-13 12:15:15 EST