Ferrite Bead/Filter Replacements (found near JAMMA edge of PCBs)

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    • Ferrite Bead/Filter Replacements (found near JAMMA edge of PCBs)

      I'm looking for an adequate replacement for the ferrite beads often found near the JAMMA edge of a game PCB. Example:



      Both the small orange parts near the JAMMA edge and the small blue parts along the edge of the C board are what I'm talking about. I'm actually curious the proper value part, not just "oh, pull one off a dead board." Does anyone have schematics that might specify an exact value?

      Thanks!
      -ud
      Darksoft Multi(s): CPS2, CPS3, F3, ST-V /// CPS2 Game(s): 42/42
      Cab(s): Namco Exceleena 1 /// Monitor(s): Amiga 1080, IBM P260, BenQ RL2460
      Scan Converter(s): Micomsoft XRGB2+, Silicon Optix ImageAnyplace
    • I'd be interested in this as well. I had attempted to find some that matched the system 573 hardware when I was building an interface PCB for my DDR lights project but came up empty handed as the specific part used was discontinued and I couldn't find any similar specced parts. those at least had a number on them.
      I've got a few capcom boards with busted filters I'd love to replace but no idea what to replace them with.

      some I've seen are just a capacitor to ground like this: reichelt.com/us/en/Filters/DSN…OUPID=3175&ARTICLE=101694 others are just ferrites and others are ferrites and capacitors combined.

      I suppose you could always check the capacitance/inductance and see what they measure..
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    • most likely they're Emifil or EMI Filter, made by TDK.

      the one with ferrite bead i know is from sega filter bd, which you can easily see the bead itself wounded by wires. don't know if there's a packaged one.

      some sega filter bd have values stated in manuals.
      the most common value are :

      223 - for power lines
      102 - for VGA signals
      103 - for VCC line
      680 - for I/O signals
    • Dion wrote:

      most likely they're Emifil or EMI Filter, made by TDK.

      the one with ferrite bead i know is from sega filter bd, which you can easily see the bead itself wounded by wires. don't know if there's a packaged one.

      some sega filter bd have values stated in manuals.
      the most common value are :

      223 - for power lines
      102 - for VGA signals
      103 - for VCC line
      680 - for I/O signals
      Cool, thanks for that. Do you happen to know what those numbers correlate to? I know ferrite beads are often rated by impedance at frequency (i.e. 50 Ohms @ 100Mhz).
      -ud
      Darksoft Multi(s): CPS2, CPS3, F3, ST-V /// CPS2 Game(s): 42/42
      Cab(s): Namco Exceleena 1 /// Monitor(s): Amiga 1080, IBM P260, BenQ RL2460
      Scan Converter(s): Micomsoft XRGB2+, Silicon Optix ImageAnyplace
    • undamned wrote:

      Dion wrote:

      most likely they're Emifil or EMI Filter, made by TDK.

      the one with ferrite bead i know is from sega filter bd, which you can easily see the bead itself wounded by wires. don't know if there's a packaged one.

      some sega filter bd have values stated in manuals.
      the most common value are :

      223 - for power lines
      102 - for VGA signals
      103 - for VCC line
      680 - for I/O signals
      Do you happen to know what those numbers correlate to? I know ferrite beads are often rated by impedance at frequency (i.e. 50 Ohms @ 100Mhz).-ud
      they're in pico farads, like you read cap numbers. i.e: 223 = 22000pf = 22nf. the emifil itself, have voltage rating, which can be easily determined by our application in board. and, i think they also have freq category. read one datasheet will shed some light about them.