Need help with Gameplan MPU-2 board

SEgamer

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Just got my first pinball machine called Super Nova by Gameplan. I knew when the guy said that it didn't work that it was more than likely due to the battery corrosion associated with these machines, but for the price I couldn't pass it up.

Luckily, the battery damage isn't near as bad as I thought it would be and only one chip has corroded. I need to know what this chip is because the labels on it are no longer visible on mine.

Here is a picture (from flippers.com) and the chip circled in yellow, as well as the schematic drawing of it.

http://i107.photobucket.com/albums/m287/twanger929/MPU2.png


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as well as the schematic drawing of it

wont be able to get to my MPU till day after tomorrow
if you have the schematic drawing, is there not a corresponding parts list to cross reference to ? i guess not which i why you are asking :)

hopefully someone can help you before i can get to my storage unit
PM me if i forget
 
When it comes to gameplan,The best of the best is Jim F. @ Echolake pinball 330-278-2228,He was selling brand new mpu boards for GP for 220.00 shipped.
 
What Lindsey said; the GamePlan repair guide lists it as either a 74LS32, or a 74C32 - position U9 on the MPU-2 board. Also see pictures showing a 7432, so any of the three appears to be proper.
 
What Lindsey said; the GamePlan repair guide lists it as either a 74LS32, or a 74C32 - position U9 on the MPU-2 board. Also see pictures showing a 7432, so any of the three appears to be proper.

That's it! I was having one of those stupid moments when I tried to search LS7432 and C7432. No wonder I wasn't finding anything on it. That and I should've known that the random line at the top was power since it's pin 14.

Looking at the datasheet, it is identical to a 74LS32 as far as the pinout goes. Only difference is that the C32 can take higher voltages, which is probably why it's on there instead of just another 74LS32. Found a semi-replacement that's available (pins don't match up), CD4071, and with a little re-wiring it should work fine.

Thanks to everyone for the input!
 
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