TRS-80 video synch chaos

From: Allison J Parent <allisonp_at_world.std.com>
Date: Tue Jun 9 14:26:16 1998

<Characters lean to the right, and the display moves all over the screen.
<Usually the motion is quickly to the left while also moving upward, thoug
<sometimes it stabalizes and just moves upward.
<
<Is there an adjustment to control this somewhere?

Yes in or on the monitor. The system board video is clocked off the
system crystal and stable. There are two adjustments for H&V position
but they aren't likely the problem.

The common problem is the monitor either the 4n25 opto isolator in the
interface or more common video problems that tubes incur.

Allison
Received on Tue Jun 09 1998 - 14:26:16 BST

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