Hi all, after months of flawless play (thanks to GRUMPY and others) I've recently run into an issue with my #F-14 Tomcat. The game began to reset, frequently enough that you couldn't play a game. I knew this day was coming; all the caps and bridge rectifiers are original on the system power supply board. To prepare for this, I purchased an Xpin XP-WMS8345 Rev D, so that I could still play the machine while I fixed the original board. I also purchased the Inkochnito board as recommended in the System 11 Bulletproofing threads.

I installed both the power supply board and the inkochnito board without issue. When I powered on the machine, the system initializes without error. The lights and sounds work, but you cannot start a game.

Tested:
•All fuses (back box and playfield)
•In coil test only the following coils activate:
o Flasher 9
o Flasher 10
o Upper diverter
o Lower diverter
•In switch level test:
o Flippers work
o Credit button works
o Slingshots don't register
o Pop bumper doesn't register
o All other switches work
•In edge test:
o Same as above

No errors reported in these test modes.

The Xpin power supply has diagnostic LEDs and test points. I've attached those results.

Test point results (resized).png

20180310_080021 (resized).jpg

20180314_211515 (resized).jpg

I also checked the Inkochnito pins; in attract mode, they were all measuring high.

inkochnito voltage readings (resized).png

Great idea, unfortunately, I just loaded it up with credits, and it still doesn't respond to the start button. Start button reads just fine in the switch test. Thank you for the suggestion though.

Grumpy, you solved step one. Doh.

I should have mentioned this. I have the LED display, very good point. With the old power board, I removed the F1 fuse after installing the LED display. Is -16v in the ballpark for the LED display?

No, but I couldn't add them, because none of the solenoids are firing (other than the two listed above during test mode). So, I just manually added the four balls by pushing them up towards the trough. The game now responds to the start button, but will not load a ball to the launcher. The flippers are working. I think this means I've got an issue on the Inkochnito board side of things. I'll have to get the input and output voltages there (I only listed the output above).

Note:
In attract mode, all the lights are on, the sound is working, but the lights do not change. Normally, the backglass LEDs flash, and there is a light show on the playfield. Right now, everything is just on.

Ok, I may need some help there. I'm colorblind. I've taken another photo, that I thought matched Inkochnito's instructions for the same game, posted here:
http://home.kpn.nl/p.koch3/Tomcat_Proto_1.jpg
http://home.kpn.nl/p.koch3/Tomcat_Proto_3.jpg

IMG_20180409_225716 (resized).jpg

The bridge board reads 38VDC on the upper right connector and 28VDC on the lower right connector.

The ride-side connectors on the Inkochnito bridge board feed 3J1 on the XPin power board. The backs of the connectors at the XPin board read the same as the values at the Inkochnito bridge board. If I unplug 3J1, and test the mating ends of those pins, my readings differ because now the connector is out. The values change from 38vdc and 28vdc to 28vdc and 18vdc. Both D9 and D14 LEDs go off when I pull 3J1. No change on D4 (off).

Photo of 3J2 attached.

My 3J10 connector is homemade. If you could double check those colors for me, against yours (labeled 4), that would give me some confidence in that connector.

IMG_20180410_091215 (resized).jpg

Grumpy, thank you very much. I'll keep you posted.

New XPin board arrived today. Plugged it in, and everything is working. The rep at XPin says this is only the second board in four years that was released like this, so I would call this situation unique.

Thanks again to GRUMPY for the help in resolving the issue.