Help with Atari Rush the Rock Schematics needed

What the heck is Rush the Rocket?

How about scann>>

What sort of issues do the motor driver boards have? Are they complex? Usually that sort of thing is pretty easy to diagnose without a schematic.

There is rec.games.video.arcade.collecting, but I think most of the techie types who post on there are on this group too.

Try the forums at

There are two boards each with different symptoms #1 has the drive such that the wheel pulled hard left I suspect a blown op amp opa541 the second jumps around when nothing should be happening intermittent I swapped the boards between machines and the problems followed. No obvious memory parts on the boards to I think I have some analog or drive problems

These machines were both bought recently and haven't worked since they were delivered so I suspected the usual broken or hairline cracks on electrolytic caps but found nothing

Start by checking the output devices, a shorted transistor in an H bridge will cause the motor to pull hard one direction. If you suspect an op-amp is bad, replace it, they're cheap, you can always desolder specific pins to isolate sections of the circuit and work your way back.

The jumping around randomly can be a lot harder to track down. Are you sure no decoupling capacitors got knocked off? Those can cause all sorts of gremlins.