Re[2]: A few WG6100 tips and tricks

-----Original Message-----
From: "urban_paranoia1" <urban_paranoia1@btopenworld.com>
To: <vectorlist@vectorlist.org>
Date: Fri, 16 Apr 2004 11:47:18 +0100
Subject: Re: VECTOR: A few WG6100 tips and tricks

>
> "I had this problem a very long time ago with a battlezone playing itself
> on the rear of the tube..."
>
> <SNIP>
>
> Interesting!
>
> Incidentally, I have a Battlezone currently doing something similar, but the
> PCB is at fault, NOT the monitor. All you get on screen is a green dot with
> a few random vectors and the vector "chatter" is very loud compared to a
> working board.
>
> The Monitor has tested fine with a known good PCB.
>
> On a scope the faulty PCB produces an image which appears at the top and
> bottom of the creen...you can see the game playing but it's very distorted
> and "thin".
>
> Effectiveley the game is being drawn way off the limits of the screen.
>
> Still haven't narrowed the fault down yet, though! AVG section *seems* to be
> OK and someone has suggested 74LS...maybe a 157? I'll be looking at that
> next...
>
> Anyone got any suggestions?
>
check the datalines on the dac's, if they seem o.k. then suspect the dac's or the analog stuff.

maybe change the opamps and see what happens.

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Received on Sun Apr 18 19:12:44 2004