Re: Omega Race Question

Dan Todd wrote:
>
> If you are missing the left half of the picture it sounds like one of the
> chassis transistors on the monitor.

But since he has the same pic on his scope, that points to the game PCB.

If you can trace the bad X signal all the way back to the DAC, first check the
DAC inputs to see if any of them are constantly High/Low. Especially the high
bit, it is the one that deflects the beam either positive or negative. If it is
getting data and not stuck high or low, then I would susupect the DAC. Also,
make sure any power supplies going into the DAC are correct, these can make big
changes in the signal.

>
> Dan
> On Sat, 11 Sep 1999 00:04:36 -0700 (PDT), you wrote:
>
> >3) I'm getting a full Y output on my *scope* but I can't figure out why
> >the left (X half) of the screen is missing. The TL08x op amps on the x
> >side are getting proper voltages and the inputs and outputs look like
> >they've got a good signal. As I go further back into the circuit I'm not
> >seeing anything that stands out as a bad signals. Is there anything I
> >should be suspicious of when the left have is missing?
Received on Sat Sep 11 19:39:44 1999