System 80b pop bumper

(Topic ID: 238450)

System 80b pop bumper


By hockeymutt

5 days ago



Topic Stats

  • 26 posts
  • 7 Pinsiders participating
  • Latest reply 1 day ago by hockeymutt
  • Topic is favorited by 1 Pinsider

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    #1 5 days ago

    Good evening everyone just got 3 replacement pop bumper driver boards and 2 of them fixed my pop bumper issues, the 3rd when I pressed the test switch it sparked and fried the trace from pin 2 (ground). The coil in brand new and have checked for proper ground, cross shorts and shorts to ground with no discrepancies noted. I've also checked the connector to their respective spots and all checked fine.

    All fuses are good with proper ratings.

    Any help would be awesome .

    #2 5 days ago

    Are you sure the diode is the right way?

    #3 5 days ago

    Board has built in diode protection. Shouldn't matter.

    #4 5 days ago

    If the header pins were replaced, was the keyed pin in the correct position?

    #5 5 days ago

    It was a replacement from pinrepairparts he did all the work

    #6 5 days ago

    Compare the components to the failed board to a working board. Is the orientation of everything the same, or are there any differences?

    #7 5 days ago

    Yup everything is the same and keyed correctly wonder if I just got a random bad board.

    #8 5 days ago

    Is the coil in the damaged circuit wired correctly? Sounds like it might be wire up backwards. You mentioned it was brand new. Easy mistake to make.

    #9 5 days ago

    His boards have built in diode protection so it shouldn't matter which wire is on which side of the coil at that point

    #10 5 days ago

    Can you link to talk about this built in diode protection? I don't get how it could do anything a fuse wouldn't if the coil shorted.

    #11 5 days ago

    Diode protection or not. Are you sure the coil is wired up correctly? That would be where I check first. There is a lot of juicie goinging to the coils. What brand pop boards did you get? A photo of the fried board would be helpful.

    #12 5 days ago

    Here's the Board and link. Desoldered old coil wire for wire as well.

    https://pinballreplacementparts.com/collections/circuit-boards/products/new-pop-bumper-board-replaces-gottlieb-machine-part-d-20923

    IMG_9907 (resized).JPG
    #13 5 days ago

    Interesting. I’ve never seen that one before. And the fuse for this pop board didn’t blow when you ran the test?

    #14 5 days ago

    Hahah nope, blew my mind. Trigger led lights with the spoon switch. Getting 25 volts at the coil as I should be. And 5 everywhere I am as well.

    #15 5 days ago

    You can always try one of your known good pop boards in that location if everything seems to check out. Like you said, might have just been a bad board. At this point it is kind of a roll of the dice.

    #16 5 days ago

    The page says "even if there's no diode on the coil", not "even if the diode is backwards". Maybe it protects that too, but that's a very different case.

    #17 5 days ago

    What game is this for?

    #18 5 days ago

    Tag team

    #19 5 days ago

    Perhaps the diode on the coil is shorted. Try removing the diode and meter it.

    Quoted from Mad_Dog_Coin_Op:

    You can always try one of your known good pop boards in that location if everything seems to check out. Like you said, might have just been a bad board. At this point it is kind of a roll of the dice.

    It would be better to fix the trace on the board, swap it with a known good board and see if it does the same thing as it did on the non working bumper than to possibly burn another board on a possible bad coil / diode.

    #20 5 days ago

    Removed a diode off a working coil and with a good replacement board is now causing the coil to lock on instantly and blowing the 2amp fuse

    #21 5 days ago

    If you hook the power wire to the wrong side of the coil something bad is gonna happen, as a noob I did it to my f-14 blew transistors twice and a flipper bridge rectifier. Power should be on banded side.

    #22 5 days ago

    Yea I removed the diodes like his website says I can and nots to working like advertised. Causing coil lock on now.

    #23 5 days ago

    Please post some pics of the coil in question.

    #24 5 days ago

    Here it is, got it from Marco. Replaced 2 out of 3. The one that was working had a weaker pop compared to the originals.

    IMG_9910 (resized).JPG
    #25 2 days ago
    Quoted from hockeymutt:

    Here it is, got it from Marco. Replaced 2 out of 3. The one that was working had a weaker pop compared to the originals. [quoted image]

    Can you show the coil tabs?

    #26 1 day ago

    Give everyone an update, it was a bad diode on the brand new coil. Chris over at pinballreplacementparts.com was excellent and sent me over new boards after it happen.

    Would have never thought a new coil would have had a bad diode. $.10 in parts caused 2 days of troubleshooting and $40 in parts. I now have 200 diodes of all sorts to have on hand.

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