(Topic ID: 182631)

Street Fighter keeps blowing F25

By waffen_spain

7 years ago



Topic Stats

  • 6 posts
  • 4 Pinsiders participating
  • Latest reply 6 years ago by ImNotNorm
  • No one calls this topic a favorite

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#1 7 years ago

Hi guys, need your help here, hope you can see what I can't

Both ramps are not working cos the Fuse 25 keeps blowing.

If I put a new fuse, everything works fine for a time, can be 2 days, can be a weeks, but finally fuse dies.

I little history about machine problems:

* F25 was overfused, heavily overfused.

* Burnt Auxboard (replaced transistors, fixed damaged tracks)

* Burnt left ramp coil (replaced the coil with an original old stock)

* Q8 Transistor burnt (left ramp), replaced and verified to work.

* Left ramp coil EOS switch checked and adjusted, its broken 500V ceramic cap replaced (broken leg)

As you see most of the parts related to the left ramp are new (coil, eos capacitor and q8 transistor), during game the coil gets hot cos as you know it keeps the ramp up, so its energized for a long time, the other ramp coil gets hot too, but no problems.

The old owner put a very big fuse, so the problem is not new (and it also killed the Q8 and the coil for sure).

The melted coil and blown Q8 tells me that the coil is getting too much volts, but the EOS is clean and looks correct, the 500V ceramic capacitor at the EOS has one leg broken so I put a new one, not sure if that cap can be the problem or if its there only to avoid sparks.

What do you think? we really love this game, we play like 20 games everyday trying to beat other friends records

#2 7 years ago

Guys? any ideas? should I replace the EOS switch or check the driver board again? don't know what should be my next step

#4 7 years ago
Quoted from Atari_Daze:

Are you certain the coil you replaced was wired correctly before? Did you compare it's wiring to any schematic you may have? I have read multiple treads on here about coils heating up and/or blowing fuses etc where one installed a new coil and simply matched the existing wiring on the bad coil only to have the problem persist. I'm guilty of this too, I now double check against schematics the connections as they SHOULD be!

HS! I never thought about that!

I did just what you said, replaced the burnt coil and matched the existing wiring

I will check it tomorrow, thanks Daze

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