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(Topic ID: 282069)

Pinbot no music


By LongJohns

8 days ago



Topic Stats

  • 12 posts
  • 5 Pinsiders participating
  • Latest reply 3 days ago by uncivil_engineer
  • Topic is favorited by 2 Pinsiders

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    pinbot2 (resized).jpg

    #1 8 days ago

    So I got a Pinbot and I am not getting any music.

    Music test - nothing works as I scroll through each effect
    Sound test - all works ok.

    One thing, when reading the manual, it states to go to the music test and then switch to Auto-up so that the display shows music off. It never shows music on - it is suppose to?

    I have replaced the caps and voltages and have verified that the op amps and PIA are good. Unfortunately I don't have another game I can swap the board to see if it is the sound board or the CPU, but I doubt that there is a problem with the CPU since the other sounds are working, or am I wrong?

    #2 8 days ago

    Have you checked for cold solder joints at 3J6 on the power supply?

    #3 8 days ago
    Quoted from Timmo:

    Have you checked for cold solder joints at 3J6 on the power supply?

    Yes, and thank you for your suggestion.

    Should have also mentioned that I rebuilt the power supply and resoldered all connectors on all boards. This machine was a basket case when I got it (nothing worked). But have it now to the point where it will play, just no background sounds.

    I also replaced the ribbon cable between the MPU and the sound board. Also verified that U4 is good using the BIN file from IPDB.

    #4 8 days ago

    Do you hear a tone when the game boots up? This sound is generated when the sound board boots up or is reset.

    If the sound test is working, but the music test is not, then I would suspect the sound board, and the ribbon cable that connects it to the Mpu.

    #5 7 days ago
    Quoted from uncivil_engineer:

    Do you hear a tone when the game boots up? This sound is generated when the sound board boots up or is reset.
    If the sound test is working, but the music test is not, then I would suspect the sound board, and the ribbon cable that connects it to the Mpu.

    Yes, I get 2 bongs at startup (I believe this is normal) - ribbon cable is good (I tried a different known good one).

    #6 7 days ago
    Quoted from LongJohns:

    Yes, I get 2 bongs at startup (I believe this is normal) - ribbon cable is good (I tried a different known good one).

    2 bongs is not normal. It is indicating an error. There should only be 1 bong if everything is good
    2 bongs indicates a U21 Rom error.

    #7 7 days ago
    Quoted from Jmckune:

    2 bongs is not normal. It is indicating an error. There should only be 1 bong if everything is good
    2 bongs indicates a U21 Rom error.

    Ding! Ding! Ding! I think we have a winner! You are correct, two bongs means the computer on the sound board has a ram error, and it not booting. Hopefully It is just a bad ram chip that is keeping it from booting cleanly.

    Pinbot uses a D-11297 sound board. To my knowledge, this board was also used in Millionaire, and F-14. So you may be able to find a used one around. You can also use a fully populated D-11581 board as well.

    #8 7 days ago

    Probably sound board like others have stated, but check to make sure you don’t have wires touching the speakers. Crazy I know, but I had an issue with mine that would cut the background music in and out if certain wires were touching the speaker in the back box. I haven’t had any issues since.

    #9 4 days ago

    Hmmm. OK thank you for the replies.

    So the sound board in the Pinbot I have is labelled as D-11298-549 - I know the -549 is Pinbot

    Should U19 be populated? The manual states that it should be installed can anyone verify?

    #10 4 days ago
    Quoted from LongJohns:

    Hmmm. OK thank you for the replies.
    So the sound board in the Pinbot I have is labelled as D-11298-549 - I know the -549 is Pinbot
    Should U19 be populated? The manual states that it should be installed can anyone verify?

    I have found over the years that using the archived pinball machine ads on this site is a great way to check board configurations. From what I have seen, it does not appear that U19 should be populated. Only U4.

    pinbot2 (resized).jpg
    #11 3 days ago

    Recommended source for a TMM2016AP-15 (or replacement)?

    #12 3 days ago

    Hmmm... That is a tough one. Ebay may be your best bet, but try not to buy one from China. Ive gotten a few counterfeit chips from there over the years.

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