Thank goodness for this knowledge base!

The Mata Hari that I am restoring is teaching me lesson after lesson. It has all new Altek boards and even a new transformer. I am about to begin the playfield swap, but wanted to get things stabilized and debugged before moving on.

It seems like component replacements sometimes bring more headaches than improvements.

I am replacing the drop target switches as the reaction chimes were sometimes going on longer than they should and at times the two stacks wouldn't reset after knocking them all down.

Replaced the four right side switches and everything played perfectly. I am thinking I am getting good at this. After swapping out the left side, the banks won't reset after all drops are down. Instead of the two bank reset, the saucer eject fires. I think I read somewhere that these two systems somehow share the same circuit.

BTW the bank reset works during test and game initiation, just not during game play.

Hoping for advice as to how to resolve this. I am on the cusp of reinstalling the old switches but I know I shouldn't. Could it be the switches behind the tombstones are cranky?

Thanks

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Trilogybeer, I think you are right. Here’s the originals and the diode is reversed.

I blindly rewired it just like the original without noting that Marco shipped these with the diodes oriented different from the originals.

Will reply if this was indeed the fix.

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FWIW, Marco ships identical looking switches with the diode installed. Unless you test the new switch, you wouldn't necessarily know that the leaf connects to a different tab on these switches.

The diodes are oriented correctly. They simply use the other tab connectivity-wise. The solve was to connect the jumpers to the non banded side of the diode on the switch tab not connected to any leaf.

I really hope this helps someone else... Hat tip to Trilogybeer!