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(Topic ID: 201674)

High Speed Sys 11 wont boot, can use help


By rubble300

3 years ago



Topic Stats

  • 7 posts
  • 3 Pinsiders participating
  • Latest reply 3 years ago by wayout440
  • No one calls this topic a favorite

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    #1 3 years ago

    Hello all, i have a High Speed pinball giving me problems. When i turn on the game, the all bulbs lite but no displays and no sound. Probably no cpu boot. I checked all voltages and appear to be good, unplugged all connectors and reseated, no change. When the upper diagnostics switch on CPU board is pressed, i get a test sound, when i press the lower switch i get a code 8. Any ideas how to proceed.

    #4 3 years ago

    First of all, tx for your inputs.

    Wayout:
    the 5v measures 4.99 at 1j17 with no ripple and 4.92 (clean) at pin 1 of U26 /U27. The 12v measure 12.69 with .2vac. not sure if that not good.. the -12v measures -14.27 with .04vac
    i checked the clock signal, its there, checked the Reset line and it goes high and stays there.
    i momentarily pulse pin 40 of U15 to gnd, i get a tiny buzz sound and nothing else happens.
    Question is now, whats next?

    Uncivil, yes i did remove rom chips, cleaned leads gently with a small copper brush. No change.

    #6 3 years ago

    Hey Wayout, success! all working. After doing the cpu troubleshooting and seeing what i could look at, i was able to get with local repair guy who had a High speed pinball. Plugged his roms in and cpu booted. Apparently my roms when bad. Weird, but they are 30 years old. Learned a little on troubleshooting along the way.
    Tx for your inputs and time, really appreciate it. Thats why i just recently joined pinside because alot of good people on here and also knowledgeable.
    Thanks again, Joe

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