Arcade Collecting > Pinball
Playmatic Chance MPU Problem
DarkSide:
Im positive its a board issue, as it is right now i can't even start a game without the ball dispenser fires 3 times, and then game over.
Guess that was the end of that machine, i can do some board repairs, but i have no idea on where to look.
Edit: Changed the Decoder board, nothing changed, as soon the scoring switches for the slingshots are connected the coils start acting up.
DarkSide:
Okay thats strange.
Had the game in test mode, pushing the switches, they should all give a different number, but those in the slingshots do not, they give 13, and that belongs to the ball trough switch
The slingshots should give 43, not 13.
Thats properly why the game thinks the ball was lost, and tries to shot a new one.
Edit: Any tips on how to fix that, wires looks good, no short circuits, so i guess its somewhere in the MPU or Decoder ?
ChadTower:
--- Quote from: pinballjim on September 16, 2011, 10:35:03 am ---Ah well, if all the coils are firing you've got a bad row or column in your switch matrix. Make a note of which ones are activating and compare it to the switch matrix, you should find that they're all in a line together.
--- End quote ---
That.
DarkSide:
The Switch Matrix yes, but i have no idea where to find out where it is in this machine.
Can a defective switch matrix make the switches think they are on another location ?
13 instead of 43.
ChadTower:
--- Quote from: DarkSide on September 16, 2011, 02:10:21 pm ---Can a defective switch matrix make the switches think they are on another location ?
13 instead of 43.
--- End quote ---
Yes, that's exactly what it could do.
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