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Thread: Teensy 4.0 SMD Repair - missing capacitor value?

  1. 03-30-2020, 10:14 PM #1
    sid8580
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    Teensy 4.0 SMD Repair - missing capacitor value?

    I managed to break off the SMD capacitor just above the "4" in Teensy 4.0 as it's printed on the underside of the board. Now the board won't power up. Can anyone tell me what value it is? I've got a lot of SMD parts so hopefully I can put a new one on and be back in business.

    Thanks.
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  2. 03-30-2020, 11:24 PM #2
    blackketter
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    I believe that this part (circled in red below) is the ferrite at the top of the teensy schematic, labelled as 120, which is likely 120 ohms at 50 or 100MHz. You could try just bridging it to see if that brings it back up, then replace it for the full filtering effect.

    Click image for larger version.  Name: Screen Shot 2020-03-30 at 4.22.12 PM.png  Views: 26  Size: 310.1 KB  ID: 19548
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  3. 03-31-2020, 02:35 AM #3
    sid8580
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    That's the one. Bridging it got the Teensy running again! Thank you!

    I don't have any ferrite that small... what will it hurt if just leave it bridged?
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