Quantcast

Search:

Type: Posts; User: majinga

Page 1 of 7 1 2 3 4

Search: Search took 0.02 seconds.

  1. Replies
    756
    Views
    313,391

    Check a capacitor in circuit Is tricky, even with...

    Check a capacitor in circuit Is tricky, even with a professional tool. And you can't just probe them around if you don't have a clue of how they are placed in the circuit and what theyr function is....
  2. Replies
    756
    Views
    313,391

    You can test the capacitors in circuit, only if...

    You can test the capacitors in circuit, only if you are sure they are not in parallel with other capacitors.

    For the voltage, unfortunately yes. The MCD1 Is not easy to diagnose
  3. Replies
    756
    Views
    313,391

    I have one of those. They are really handy, but...

    I have one of those. They are really handy, but they are not so accurate especially in things like the esr. So you can't rely on it ti check if a capacitor Is good or not.
    And, again, once you...
  4. Replies
    756
    Views
    313,391

    Personally, i would only replace the fuse and...

    Personally, i would only replace the fuse and tr4. And check the tracks around tr4. Then i would Probably power it by my bech psu, to limit the current, just in case.

    If there are no shorts, but...
  5. Replies
    756
    Views
    313,391

    Nope, when the ESR increase the capacitance still...

    Nope, when the ESR increase the capacitance still the same. Multimeters can only read the capacitance, so they are not good to check if a capacitor is good.
    They can be useful for short capacitors,...
  6. Replies
    756
    Views
    313,391

    @demonseed Sorry, I didn't take any picture when...

    @demonseed
    Sorry, I didn't take any picture when i repaired mine. Once the tray completely removed, is not so easy to put it back in the correct way. I remember when i fixed mine, i made several...
  7. No. When an MD game use the pad, the game itself...

    No. When an MD game use the pad, the game itself must control the state of the pin.
    It must work in a way like this:

    The game set the pin HIGH, then he read the values of the B and C buttons,...
  8. Replies
    21
    Views
    4,173

    Check the belt

    Check the belt
  9. Replies
    756
    Views
    313,391

    The helix screw is engaged only on the last part...

    The helix screw is engaged only on the last part of the movement, when the tray is totally in.
    Is not easy to move it by hand. Most of the time it appear to be very hard. Or the tray seem to be...
  10. Replies
    756
    Views
    313,391

    Did you tried to replace the BIOS?

    Did you tried to replace the BIOS?
  11. Replies
    3
    Views
    212

    Wow, I don't recall all this stuff. I always just...

    Wow, I don't recall all this stuff. I always just burned them
  12. Replies
    5
    Views
    378

    That's odd. I never seen a tv which don't let you...

    That's odd. I never seen a tv which don't let you to force the aspect ratio.
    Check the scart, to allow the TV to be auto set in 4:3 you need to feed about 12v on the scart PIN 8.

    Most of the time...
  13. With the fix you will be able to do the IGR in...

    With the fix you will be able to do the IGR in SMS mode, by holding B+C+DOWN for few seconds.
  14. Sensing the pin 7 make the fix available for...

    Sensing the pin 7 make the fix available for everyone who already have the mod, without the need to solder anything else.
  15. Replies
    756
    Views
    313,391

    No, still not able to see the attachment. Some...

    No, still not able to see the attachment.

    Some progress in the repair?
  16. At the moment the plan is to check the value on...

    At the moment the plan is to check the value on pin 7, if is stuck high then the MD is in SMS mode.

    Allow the micro to control the pin in such situation is not so easy. You can't just feed a...
  17. This is exactly what the SMS++ do. On the MD++...

    This is exactly what the SMS++ do. On the MD++ the micro is already capable to read the 3/6 pad buttons. This is easy.
    The complicated part here is to allow the micro to handle the pad only when the...
  18. Here some info about how the 6 buttons pad work:...

    Here some info about how the 6 buttons pad work:
    https://retroramblings.net/?p=835
    https://github.com/jonthysell/SegaController/wiki/How-To-Read-Sega-Controllers
  19. PIN 7 Is not suppose to stay fixed at one level,...

    PIN 7 Is not suppose to stay fixed at one level, vcc or ground. To allow the pad to work in 3 or 6 button mode PIN 7 must act like a clock. It continuously go high and low.
  20. It can but only in the menu. Once the game is...

    It can but only in the menu. Once the game is loaded it's up to the game to handle the pad.
  21. Replies
    756
    Views
    313,391

    Again, no attachment. You must melt the solder...

    Again, no attachment.
    You must melt the solder on each PIN together. Try to bend the single PIN is risky, you can apply too much force on the central pad.
  22. As roce said, this is game-specific. The...

    As roce said, this is game-specific. The everdrive can't do a generic patch for every game.
  23. Replies
    756
    Views
    313,391

    That's because it is a surface mount component....

    That's because it is a surface mount component.
    I would remove it with hot air. Probably is possible to use something like the chip quick to desolder it, but i would not use this method. Or just two...
  24. Replies
    756
    Views
    313,391

    Sorry, it's not clear to me. What do you mean?...

    Sorry, it's not clear to me. What do you mean?
    TR4 is an SMT component. Probably a to-252 or 263. Do you need some advice on how desolder it?
  25. Replies
    756
    Views
    313,391

    Correct. The fuse is gone. TR4 doesn't look...

    Correct. The fuse is gone.

    TR4 doesn't look good to me. I will replace it.
Results 1 to 25 of 157
Page 1 of 7 1 2 3 4