(Topic ID: 73927)

Gottlieb System 1 will not score 10 points


By eckertsbrew

5 years ago



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  • 20 posts
  • 6 Pinsiders participating
  • Latest reply 5 years ago by eckertsbrew
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    Close Encounters Switch Matrix-835.png
    Capture.JPG

    #1 5 years ago

    Hello,

    Hope someone can help me. I have the machine up and running but it will not score from any of the 10 point switches. I have checked and cleaned them all about 5 times.

    Thanks

    #2 5 years ago

    Have you gone into test mode and done the switch test? You make have a switch stuck closed.

    #3 5 years ago
    Quoted from woz:

    Have you gone into test mode and done the switch test? You make have a switch stuck closed.

    I have installed a Ni-Wumpf CPU and have tried the switch test but when I press any 10 point switch it does not display the switch number or clean switch. I thought it was a stuck switch but I have adjusted and cleaned them all a few times.

    Thanks.

    #4 5 years ago

    More than likely one of the 10 point switches is stuck closed. with Sys 1 machines, if a switch like that is misadjusted and stuck closed it renders all of those switches inoperable. You will need to go around all of the switches under the rubbers and make sure none of them are touching...it only takes one to be touching.

    #5 5 years ago
    Quoted from eckertsbrew:

    Hello,
    Hope someone can help me. I have the machine up and running but it will not score from any of the 10 point switches. I have checked and cleaned them all about 5 times.
    Thanks

    I had the same problem you did. Check out the picture below from Clay's Sys1 repair guide. I would be willing to bet this will solve your problem. Just a misadjusted switch like others have said. Report back please.
    Capture.JPG

    #6 5 years ago

    Check for a broken pin on the connector from the playfield to the cpu board, broken wire at one of the ten point switches or an open diode on the playfield. The diodes are located on little boards located near the top of the playfield well away from the switches.

    #7 5 years ago

    Thank you for the info. I will have a chance to work on it more this weekend. I will have to look at the dampening blades, I only checked the contact gap. I did check the pins at the CPU but will look at them again. A broken pin was my problem with random drops of the game over relay.

    Thanks again.

    1 week later
    #8 5 years ago

    OK.
    Got a chance to look at all the switches and found all of them open, I even double checked them with a meter. The pins look good at the terminal going to the CPU. No broken wires at any of the switches. Not sure what to check at this point. One thing I forgot to mention is, all the switches worked no problem until a coil smoked on one of bumpers. I replaced the coil and then had the game over problem, repaired the pins and now the 10 point will not score.

    Thanks,

    Keith

    #9 5 years ago

    +1 check the diodes. You probly blew a diode or two when the coil went.
    I would just replace them all since you have to snip them to test them anyway.

    #10 5 years ago
    Quoted from fireball2:

    +1 check the diodes. You probly blew a diode or two when the coil went.
    I would just replace them all since you have to snip them to test them anyway.

    Thank you. I will do that tomorrow.

    #11 5 years ago

    I pulled the diode for the 10 point switch and it checked fine. I installed a new one because I had it removed. Any other ideas. I took a meter and check continuity from the diode to each switch and connection are all good. I also checked the open side of each switch to make sure none of them are shorted.

    #12 5 years ago

    What machine is it? I have the schematic for Genie.
    When you said a coil smoked on a bumper, did you mean pop or slingshot?

    #13 5 years ago

    Machine is Close Encounters. The coil that smoked was a pop

    #14 5 years ago

    If there was an issue with the strobe it would effect all the other switches, correct?

    #15 5 years ago

    At his point I am going to make up two wires with pins crimped on one end of each and insert them into the terminal points for the 10 point strobe and return. I should be able to touch the wires together and simulate a switch for the 10 point. This should tell me if the CPU is good and I will start troubleshooting the playing field switches, wires and connections.

    If this sounds like a wrong way to go please reply.

    Thank you

    #16 5 years ago

    Ok, got to work on Close Encounters some more. I have found the following.
    No 10 point switches will score or work in test mode.
    The number 3 drop target will not score
    The left & right roto switches on left & right drain do not score.
    This would be switches. 30, 31, 32 & 34
    Would this be a Strobe issue from the CPU?

    Thanks

    Post edited by eckertsbrew : forgot switch numbers

    #17 5 years ago

    Return 3 (column 3) issue.

    Close Encounters Switch Matrix-835.png
    #18 5 years ago

    Thank you WOZ.

    I will install a new pin, check the connections at the Diode block and continuity at pin to diode block. Any other things I should look at?

    Keith

    #19 5 years ago

    OK,
    I have switch 32 and 34 working but switch 31 and 30 will not work. I have replaced the diodes, checked all the wiring and finally removed pins A1J7-3 & A1J7-17. Then install new pins with a test jig, wired in a diode and tested right at the CPU. No 10 point or #3 drop target or switch 30 and all 31's. At this point I would think something is wrong with the CPU.

    Would love some more ideas before I send the NI-WUMPF in for testing.

    3 weeks later
    #20 5 years ago

    OK pinball is fixed. I sent the CPU back to Ni-Wumpf and found the return line 3 on the switch matrix not working and it was under warranty so NO CHARGE.

    Awesome!

    Thanks for all the help.

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