Have the same issues. Will check the daisy chain this evening. However, for me, the pops and the slings work in Test Mode.. Just not IN Game. Any ideas on that vid1900 ? The solenoid expander board is new, all fuses are good, replaced a few connectors here and there, the MPU is the altex ultimate mpu. I also rebuilt the power supply.

A4J2-5? In switch test (Well, the test that tests for closed switches) I get 02 in the score display. To my knowldge this is the drop target "3X".

The playfield is on it's stomach, all the DT's are up, and the ball is not in the game. The 3X DT is registering closed, even though it is open. I read somewhere that it could be a bad diode? Makes sense.. As that would effectively close the switch.

What's weird is... I totally removed the 02 wire (brown w/white tracing) form the MPU. But it still throws 02 in the switch test. When I remove the entire connector from the MPU, I do not get the 02 message. I get 0.

blah sorry I meant brown and yellow. Brown with a yellow tracer coming from 3X DT. I'm suspecting the same BigAl56 . Where did you get those wire colors? I am having a hard time reading and getting info from these schematics

oh man I know. But these damn EBD specific schematic.. Pain in the ass.

But, I can rule out the lamp driver, aux lamp driver, solenoid expander, and the solenoid driver boards at this point right? Or is there something in the driver boards that control switch logic as well? Again, in test_ all solenoids fire.

I re-did the connections in hopes to solve this issue.

Here's a little graphic that highlights the issues. The rollover switch registers the "3 ball" target. Can that give us a clue as to what's going on?

I also made a note of the colors in J2 connector on MPU:

(pin: color/trace)

1: White/Red
2: Orange
3:Grey/Yellow
4: White/Yellow
5:Yellow/Red
6: (keyed)
7: (none)
8: White/Green
9: Brown/Yellow
10: White/Orange
11: Orange/Black
12: Brown
13: White/Brown
14: Brown/White
15: White/Blue

Is anyone able to confirm these are accurate? I looked in the schematic and can't seem to find the color codes.

I'm assuming "Single Drop Target" is the Eight Ball DT. I have also buzzed them all out and they all have continuity where applicable. But I suppose I can check that again if it will help.

EBD-matrix (resized).jpg

Well dang~ Looks like there are some wrong already So I'm guessing the J2-2 is 78, which means Orange w/black?

damn, well it looks like the colors match up.

Trying to wrap my head around how the 3ball would sound if someone hits the roll over target. Because they're in the same row, does that mean one of the diodes could be failed, allowing electricity to flow backward and close the switch?

No I received the game like this.

Thanks. Does it matter which diodes I use? I have a bunch of the diodes that are used for solenoids, however the switch diodes are much smaller.

according to this https://pinside.com/pinball/forum/topic/what-capacitor-and-diode-value-for-bally-switches The 4004 's should work. I have plenty.

Gunna pick up some of these too..

ebay.com link: QTY 100 047uf 50V 20 Z5U AXIAL CERAMIC MLCC CAPACITORS SA055E473MAA AVX