I just purchased my first arcade game, super off road with the track pack. I'm having some trouble with the screen. Some other users have posted about this in the past, but the threads never resulted in a solution.
I am missing an EPROM, U68 (03-25016-01) on the bottom board according to the track pack documentation. I found that chip on the "background proms" schematic, although it only utilizes that port when using the track pack (I think).
-Screen is aligned properly upon startup and non-race screens
-the entire track is properly displayed when viewing backgrounds in diagnostic mode.
-track is shifted approx 30% upwards although the ghost cars still follow where the track should be during racing by either the CPU or by game players.
-voltage is 5.22 at the top card
-All chips have been cleaned and re-seated
-all diagnostics check out ok
Would a missing EPROM be the reason why the rack is shifted up? If so, what are the chances of me finding a replacement? Thanks in advance.
I am missing an EPROM, U68 (03-25016-01) on the bottom board according to the track pack documentation. I found that chip on the "background proms" schematic, although it only utilizes that port when using the track pack (I think).
-Screen is aligned properly upon startup and non-race screens
-the entire track is properly displayed when viewing backgrounds in diagnostic mode.
-track is shifted approx 30% upwards although the ghost cars still follow where the track should be during racing by either the CPU or by game players.
-voltage is 5.22 at the top card
-All chips have been cleaned and re-seated
-all diagnostics check out ok
Would a missing EPROM be the reason why the rack is shifted up? If so, what are the chances of me finding a replacement? Thanks in advance.