Completed my playfield swap, and now have the following problems (everything worked prior to swap):

1) When starting a game, ball does not eject, and several solenoids fire. Game does not start. All the switches in the trough work correctly.

2) Lower right flipper does not fire when button is pushed, however, upper right flipper works. I've gone thru the schematics and I can't figure out the problem. However, when I add a jumper (shown in red) from the coil's BLU-VIO wire to the flipper button's ORG- VIO wire, and push the button, both upper and lower right coils fire. From the schematic, there appears to be connections between the coil and the button, but I can't locate these connectors/connections.

3) Lamp column 2 works when I play with the connector and wires between the playfield and the back box. I don't think this is a big problem, but problems 1 and 2 are the concerning ones at this time.

Anyone have any ideas where to start looking. I'm wondering if all the problems are in the connectors between the playfield and back box, but it's pretty straight forward.

flipper jumper (resized).jpg

Using the Switch Level test, I rolled the balls over the switches in the trough. All the switches registered.

sw1 (resized).JPG

sw2 (resized).JPG

GRUMPY:

No,,,,,,,,,,,,,,, However, I found the problem. I thought all the trough switches were registering, however, since you asked this question, I went back and noticed that Switch 14 (left ball trough) was not registering. Once I adjusted the switch, it went right into game mode, ejected the ball, and all is good. Thank you!

I found the lamp column problem,,, YEL-RED wire pulled out of the molex connector. I ordered a pin remover, and I can call that problem fixed.

The big question which is really puzzling me is the lower right flipper not firing. I don't understand why it fires when I jumper it, and both coils fire when the button is pressed. Do you know what these connectors are referring to ; P/O 8J & P3 (pin 34) and P/O 7P1 & J1(pin16) . I'm having a hard time with this nomenclature and can't find where they are located. Could there be a bad connection at these points.

First I want to apologize for providing the wrong picture of the previous jumper configuration along with the results. What I actually jumped is shown below (I must have had a senior moment). I basically bypassed all the intermediate connections, and when I did, both flippers coils fired. This indicates to me that there is a break in the wire (connectors) between the coil and the switch for the BLU-VIO wire.

I guess I have to start tracing the wire to see where these connections are. Does somehow this BLU-VIO wire from the coil go thru the CPU board before it goes back to the switch on the cabinet?

flipper jumper 2 (resized).jpg

Grumpy, thank you, but you don't need to check. I found the problem, a bad solder joint on the coil. I traced the wire, and couldn't see anything suspicious, other than a nasty looking solder job on the coil for the BLU-VIO wire. I wouldn't have expected it to be a problem, but I couldn't find anything else. A good lessons learned!

Noticed another problem popped up. Flasher #6C is not working. Knocker #6A does work. So driver transistor Q23 is good. Checked to see if Solenoid is energized (C side) during #6C flasher, and it does. Checked the diode on the diode board, and they are good. LED flashers are installed and ground wires on the resistor boards are disconnected.

During the "coil test", and locked on the 6C flasher, I wiggled the connector between the playfield and the cabinet to check for a loose connection/pin, and flasher did not come on.

Any idea where I should check next?

The special solenoids (left & right slings, upper and lower diverters, and the jet bumper) are not working, not even in coil test mode. In switch edge test, neither of the switches register. I jumpered the row and column pins on the CPU board for the switches, and they register. All the fuses test good, in the backbox and the two on the playfield. I can't believe that all of a sudden there is a wiring problem, but who knows. Any suggest on where to check?

I followed the voltage, I mean "no voltage", all the way back to the power supply. Pins 4 & 5 at 3J3 had no voltage. Apparently, the F4 fuse had blown (I had checked it w/o taking it out of its holder, checked good), a straight 2 AMP fuse had been installed, and been that way for 20 years. I installed a 4 AMP SB fuse, and it's back up and running.

Thanks vid for your help !!