Recent content by mwiggett

  1. Found or No Longer Wanted Asteroids Vector ROMs Rev2

    They are 2716’s. You can get the files from MAME or I could email them to you.
  2. Found or No Longer Wanted Asteroids Vector ROMs Rev2

    Do you have a programmer?
  3. Space Invaders Deluxe (Midway) - Garbled graphics

    I’ve only worked in a few of those boards. There’s other people here that are much more knowledgeable on these than I am.
  4. Space Invaders Deluxe (Midway) - Garbled graphics

    I know what MX means but for the life of me, I cannot remember. Yes the 74LS153 are compatible. I’m unsure of the other answers.
  5. Asteroids rev 5 PCB bad X and Y output voltages

    Honestly, I’d send the board out. You don’t want to just change chips for the sake of it. You can cause more issues.
  6. Asteroids rev 5 PCB bad X and Y output voltages

    The frequency should match what the schematic say on the scope. But they are probably fine.
  7. Asteroids rev 5 PCB bad X and Y output voltages

    I was looking at the wrong part of the schematic. C5 may have a clock that sounds strange on the logic probe as that one is 3Khz. C4 should have clock on 11,12,13,14
  8. Asteroids rev 5 PCB bad X and Y output voltages

    Should have a clock on pin 2 at all those chips. Check continuity between all three of those chips to fit into.
  9. Asteroids rev 5 PCB bad X and Y output voltages

    I've had that same graphic issue and I think it was a bad RIP carryout on one of the 191 position counter that fixed it. I may be mistaken.
  10. Space Invaders - Midway - garbled screen

    I was able to get it to boot up by replacing F7, the daughter board needs work to get the game to fully run. I’ll returning the board set so he can continue with the rest of the diagnosis. Daughter board needs some love to make it boot and run reliably.
  11. What fixed your game today / general repair log

    Not much of a repair but I had an extra Centipede board for about a year on a shelf that I bought not working. Finally decided to take a look at it. It was missing one ROM, both objects ROM's, high score chip, a capacitor, a resistor, and the red LED power light. I replaced all missing...
  12. Asteroids Graphic Glitch

    As strange as it sounds, I did have a bad 4016. Funny thing is, they work fine in a different board.
  13. Asteroids Graphic Glitch

    I agree. Unless I have a bad one that I installed that just happens to have the same problem, that would be a big coincidence.
  14. Asteroids Graphic Glitch

    Even inverted, glitch is still there.
  15. Asteroids Graphic Glitch

    No they aren't off brand. I didn't induce this glitch by replacing anything. Glitch was always there.
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