I’m having an issue with my TFTC's switch matrix. I know the series of things you need to do, to make the errors happen, but I just can't figure this one out. I don't have any other issues with the machine, and the game's mechanics play flawlessly.

All connectors have been reseated, inspected and none look burned. All diodes appear to be correctly installed and I can’t find any broken wires. Now, I could've missed something, so perhaps there's a specific place I should really investigate further.

The game has original boards, with the exception of the PPB, which has recently been replaced with the XPin version.

Here's what's happening mid-game or in a switch test...

1.) When the left spinner is activated and I hit both flippers while it's spinning, the captive ball switch activates

2.) When the right spinner is activated and I hit both flippers while it's spinning, the right ramp exit switch activates

3.) When the ball is in the power scoop and I hit both flippers, the middle spinner is activated

The common denominator is hitting both flippers during those moments and that's what makes things act up, and it just so happens those exact switches are all in the same quadrant of the overall matrix. Two pics attached below show the entire switch matrix, and that quadrant of switches in question.

Thanks for any help, anyone can offer.

Screen Shot 2017-10-08 at 9.11.00 PM (resized).pngScreen Shot 2017-10-08 at 9.11.13 PM (resized).png

Thank you for the feedback here. I'm always doing more and more inspections of the diodes and wires, as I could've missed something through the various run throughs. Let me double check that again tonight and look for those wires specifically.

What gets me is that it always happens when both buttons are pushed without fail, and when a ball drains and it's running through the music and processing scores for that ball, if I hit the flipper buttons together, it makes the call out occur "you axed for it" like it would for the captive ball, and the flippers don't flip when I do that during that time.

I'll go through tonight and look for the wires, diodes and look at the CPU. Can't hurt to keep looking for errors. Again, thank you for the response!

Ahhh great idea! I'll get the spinner spinning and try to replicate it with movement. Looking forward to digging back in tonight with these suggestions.

Just an update here, I tested the shaking method, spinning the spinner and then moving the machine and hitting certain areas to make the errors occur, and I couldn't replicate it.

Tonight I'm going to dig in further to check any and all wires. I did find a connector with what appears to be an operator's "quick fix", as it's clear they didn't want to or know how to re-pin a connector, and put some solder down on white/violet wire and a white/brown wire that must have come out of the connector housing.

I'll post pics and location of that connector this evening. That's the only thing that looks off at the moment.

Thanks man!