Tempest Boards

    I don't know if its just me or everyone, but I have the hardest time
repairing Tempest's and SW.

    Maybe someone with a bit more logged time on Tempest repair can help me
out.

    Here is what I have.

    I have one complete working Tempest board so I check out the aux(smaller
pcb with Pokeys) pcb on the bad boardset and it works.

    Problem is definetly on the main big PCB.

    Roms are known good as I tested them on my working board.

    Watch dog does not reset. Using oscope for display so I know that works.
Cpu is good tested that on the other boardset.

     Displays a bit of junk then the dot just floats around a bit.

     I think its in the Vector timing or that part of the circuit. Anyone
have a faq or known area that is problematic. I don't see any stuck high or
low pins anywhere and I find it hard to believe that both the X and Y dac's
and amps would be bad.

Thanks,

Fred

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Received on Sat Mar 1 19:13:46 2003