Video Height Adjustment

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

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

--~--~---------~--~----~------------~-------~--~----~
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 http://groups.google.com/group/lisalist?hl=en
-~----------~----~----~----~------~----~------~--~---

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

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