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(Topic ID: 170942)

DE MPU registers switches but won't fire coils

By galaxian

7 years ago



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#1 7 years ago
OP
 
GLX

galaxian

Pinside+ Frequent

10y 65,050 661 11

Trying to figure out where to look on the board for fixing this issue. For a data east simpsons.

Issue: pop bumpers, slingshots don't work.
Tests: I manually short the transistors the coil will fire.
I tested the switches and the MPU records the switch press.
The problem is the MPU won't trigger the coils.

Thoughts?

Thoughts?

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#4 7 years ago
OP
 
GLX

galaxian

Pinside+ Frequent

10y 65,050 661 11

Solved. It was a bizarre situation where I grabbed a MPU out of poto and put it in simpsons. The board that came out of poto was marked version 3 but was actually a version 2 board. It wouldn't work with simpsons since it was missing the circuit to drive the special solenoids

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