Howdy all
I just acquired a mr and mrs pacman machine, and all tests fine except for the right flipper does not move pacman during pac maze play. The flipper (and the upper flipper) work fine in pinball mode, and I've checked and reseated the connectors under the board itself. Tracing out all the other connectors, everything appears to be connected to each of the boards. Left works fine to change direction.
Appreciate any steps from here. thank you!
Not sure how Bally wired this game but. In most cases you'll have a double stacked leaf switch on the flipper button or at the eos switch on the flipper assembly. One switch closure operates the flipper, the other, probably separated by a plastic pusher would signal the maze moves. Guessing a dirty contact or bad contact on that switch.
Theres probably also a switch that triggers the upper flipper as well.
The guy that did the wiring harness didn't know he could get the flipper wiring from the cabinet cable connector on the MPU so he broke out switch wiring from the playfield harness. Look for a break out connector from the playfield harness to the cabinet harness. Sounds like that is not connected properly or has a loose wire.
Here's some pictures of the item in question
https://imgur.com/a/ek0TaHs
I cleaned the contact on the cabinet switch, and checked the lamp driver board. It doesn't look damaged, but is possible the relay is bad? would I be able to swap something like an alltek board in to eliminate that without soldering a new relay in?
here's a video of the overall issue
https://vimeo.com/333199695
back_lamp (resized).jpgfront_lamp (resized).jpgleft_flipper (resized).jpgright_flipper1 (resized).jpgright_flipper2 (resized).jpgThe relay on the solenoid driver board just enables/disables the flippers. It doesn't have anything to do with controlling the maze.
The wiring for the maze switch on the flipper switch stack goes to the MPU board (J3), not the lamp driver board. MPU board is the upper left board in the head.
When you push the flipper button, are both of those leaf switches closing? The leaf switch closer to the button activates the flipper, the second switch further from the button controls the maze. There's a diode on the bottom of that switch. Does it test ok or is it open circuit?
Quoted from Quench:The relay on the solenoid driver board just enables/disables the flippers. It doesn't have anything to do with controlling the maze.
The wiring for the maze switch on the flipper switch stack goes to the MPU board (J3), not the lamp driver board. MPU board is the upper left board in the head.
When you push the flipper button, are both of those leaf switches closing? The leaf switch closer to the button activates the flipper, the second switch further from the button controls the maze. There's a diode on the bottom of that switch. Does it test ok or is it open circuit?
Yes, the diode is intact although I haven't put a meter on it yet. The cabinet switch itself closes good and I've cleaned it pretty well, but now that you mention the MPU is controlling the maze switch - is that J3 spot also what triggers for the switch in test mode?
Ok, then check for continuity by tracing where those switch wires travel up through the harness, where it plugs in to the MPU (J2). The MPU is the board in the upper left of the head.
You likely have a broken pin inside that wiring hardness. It's more likely to be a disconnect on the solid brown(?) wire in your picture, since the Yellow/Red wire is connected to other things that are working properly.
Umm my mistake, Bally seems to have done something different for them and wired the cabinet flipper maze switches to J2 at the MPU board - J2 is designated as the playfield switch wiring harness and J3 is the cabinet switch wiring harness.
I don't have this game but I'm guessing that near the J2 connector at the MPU board there is probably a 3 wire connector piggy backing near J2 with a yellow-red wire, brown wire and white-green wire.
The yellow-red wire comes from MPU J2 pin 5 and goes to both cabinet flipper maze switches.
The brown wire comes from MPU J2 pin 13 and goes to the right cabinet flipper maze switch.
The white-green wire comes from MPU J2 pin 8 and goes to the left cabinet flipper maze switch.
Awesome guys, thanks for the help on this. I'll report back as soon as I have a chance to trace the wires and look at the pins in the J2 MPU connector. Luckily I have done repinning before (Thanks Baby Pacman!) so if thats all it ends up being I'll be a super happy camper.
Woohoo! All better now with a jumper wire from the cabinet switch up to MPU J2 13. I didn't see any visible damage to the original cable itself, but I will leave the temporary fix in place until I can properly bundle it together with rest of the cable braid. Thank you guys for the help!!!
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Jacksonville, FL