Quoted from barakandl:The lower right plug on the driver board is J4. You will see the same SOL-A, SOL-B labeled pins there as MPU J4. The problem is more than likely between those two connectors since the boards are new. Bit D being the last wire on the end probably most likely one to be damaged on the MPU between leaking batteries and the harness getting tugged on by the wires stressed out the pins on the ends the most.
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If you lack logic probes another way to attack this is by the 74154 TRUTH table. The 74154 truth table tells how it should work. By comparing this table, which solenoids fire at what time during sol test, and the schematic to find what Q# goes to which 74154 output. You can identify the pattern that would happen when a signal is stuck always high. Because of the "pull up resistor" on the driver board, a bad connector for a ABCD signal will most likely be always high and never go low.
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Are you using a 7 digit display in the credit window? They are supposed to be six digit. Make sure you don't have the digit drives wires in the right place if it is a six digit display. If the rest of the displays are right, I think it would be a wiring issue.
Thank you again.
Here is the latest.
First, note to self: DO NOT waste time cinching and tie wrapping your wire harness down until you verify everything is working.
What looked like this...
01fef91076812ad9ada70f10465dc057fb58947d (resized).jpg
Now looks like this...
IMG_1120 (resized).jpg
What has transpired:
The easy item first. I install the jumper lead as Andrew instructed. That resolved the lighting issue. All of the lights work fabulously. They are nice, bright, and clear.
IMG_1123 (resized).jpg
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What follows makes me feel like I am shoveling shit against the tide.
1) I removed the displays harness from Third Coast Pinball and installed a harness that Marco was selling for Stern Flight 2000 that was produced my Mike's Pinball Shop.
https://www.marcospecialties.com/pinball-parts/12B-STD-110-2
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Doing the harness swap cured my credit displays issue. 15 credits look like 15 credits. So, there is something amiss with the 3rd Coast harness ( I will need to lay them out side by side and see what is different with regards to the credit display).
IMG_1123 (resized).jpg
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2A) But I still have no solenoids. To recap, with all the boards being new Weebly boards, I had no solenoids. Removing the Weebly MPU and replacing it with an Alltek MPU offered no change with the solenoids.
2B) Replacing the Weebly SDU with an Alltek SDU still left me with no solenoids.
2C) Replacing the 3rd Coast displays harness with the Marco harness did not fix the solenoids issue.
Two sets of boards, and two different wire harnesses did not resolve my solenoids issue.
I have one more harness to try and figure this out.
But I am going to take a short break, get my pen, and make some new entries into my book of profanity