Re: WG6100 help, still struggling

On Sat, 6 Mar 2004 21:00:35 +0100, "MyPearl" <mypearl@dds.nl> wrote:

>These problems often occur in the differential amlifiers, but since you have
>a problem on both axes, I would look for a common source. Have you checked
>the power supply rails?
>
>It could also be VERY well that the input protection is kicking in too
>early. Try to lower the size on the game PCB and see what happens.

I was going to suggest the same thing. I've had problems with the Rev 3 input
protection circuit in the past. I usually disable it since it doesn't provide
much protection as is, and keeps you from running earlier versions of Tempest.

*If* this is a Rev 3 deflection board you can try unsoldering and lifting one
leg on each of the diodes 805 - 808 (I think that's right, check the schematic
to be sure). If it's not a Rev 3 board, these diodes won't exist, and the new
protection circuit is obviously not your problem.

-Zonn

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Received on Sat Mar 6 17:50:37 2004