Re: Asteroids Deluxe with WG19V2000 problems

You might verify that the Z-out signal from the game board is actually
changing state. The monitor might be completely fine, but if the game is
not triggering the blanking circuit, you'll get video as you describe. I
don't remember if the Z-out is positive or negative logic, but either way,
if it's stuck in one state, that's no good.

Joel-

-----Original Message-----
From: Josh Wirth <jwirth@gru.net>
To: vectorlist@lists.cc.utexas.edu <vectorlist@lists.cc.utexas.edu>
Date: Wednesday, December 08, 1999 3:01 PM
Subject: Asteroids Deluxe with WG19V2000 problems

>Hey all... long time since I have been here (although I never said much
>before anyway...)
>
>I have an AD with WG monitor and I cannot get the white-dot to disappear
>unless the vectors are nearly invisible themselves. I have it at a point
>where the intersection of vectors is clearly visible but the vectors pretty
>dim. I have the HV adjusted so the proper voltages are on Q900. The
>deflection board seems to work just fine. There is very little burn-in on
>the monitor (so I am guessing the tube is probably OK.) Any clues as to
>what I might need to do to get this thing up? Should I change the high
>voltage rectifier coming out of the flyback? If so, the schematics list it
>as a H1809... something I haven't been able to cross-reference. Could
there
>be a problem with the vector generator on the main board? Any help would
be
>greatly appreciated.
>
>Thanks,
> Josh
>
>
Received on Wed Dec 8 14:13:11 1999