Lewis,
Although it has been said many, many times, I can't stress enough that
you need to reflow all the solder joints on the Battlezone CPU and
mathbox. Sockets, connectors, caps - you name it. It will cure many
strange problems.
For example, I bought a working Battlezone, brought it home and I got
strange vectors on the screen, the CPU would occasionally reset. Next
month, spot killer is on, and nothing on the monitor. Flex the board,
self-test comes up, but no game. Evidence of RAM errors during self
test. Reflowed all the solder joints on the RAM, ROMs, CPU, POKEY, 2901s
and the interboard connector. Oh, and I also cleaned the edge connector.
Game works perfectly now. And that's the limit of my technical
expertise. :)
tom
Lewis Mills wrote:
>
> Hi,
> I replaced the two voltage regulators (7815 and 7805), but still no luck. At
> least one of the Germanium 1N100s in that area of the board is short in both
> directions. Can I use a more readily available silicon diode (like a 1N4006)
> for a replacement, or does it need to be faster? Maybe more to the point,
> what might have taken out the two voltage reglators and the diode? I have
> tried two different A/Rs, and two different power supply blocks (wiht three
> different "big blue" caps), and with any combination get ~24-25V at the 22V
> test points on the A/Rs. The 24-25V is when the A/R is unloaded, tho....
> Thanks,
> Lewis
>
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Received on Thu May 31 18:14:15 2001
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