RE: Asteroids graphics in one corner

Definitely not the monitor. I've been trying to repair a few Asteroids
boards and got lucky with 2 so far
Just having bad DACs, 4016s or 081 082 chips. This one I figured was a
counter problem or something because
The whole picture is there it is just tiny and in the lower right portion of
the screen. The last board I had
With a counter problem I had to replace 12 chips trying to figure out which
one was bad. :(

Dan

-----Original Message-----
From: owner-vectorlist@vectorlist.org
[mailto:owner-vectorlist@vectorlist.org] On Behalf Of Christopher X.
Candreva
Sent: Tuesday, November 24, 2009 12:03 PM
To: vectorlist@vectorlist.org
Subject: Re: VECTOR: Asteroids graphics in one corner

On Mon, 23 Nov 2009, Dan Todd wrote:

> I have an asteroids board where all the graphics are showing up in the
lower
> right portion of the screen. The graphics are not all perfect but
>
>  everything is recognizable. Any idea where to start looking? I?m going to
> replace the 4016?s I?m just waiting on sockets to come in.

My first thought is power supply, because it is on both axis. If you lost
say the negative supply you might end up with only one quadrant. Offhand I
don't remember if that would be positive or negative.

==========================================================
Chris Candreva -- chris@westnet.com -- (914) 948-3162
WestNet Internet Services of Westchester
http://www.westnet.com/
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Received on Tue Nov 24 14:05:54 2009