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Teensy 3.2 not recognized on USB
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Teensy 3.2 not recognized on USB

by Kg6pgk on Mon Apr 08, 2019 11:52 pm

I recently received a teensy3.2 for a project development I am working on, however, after soldering the headers on, them powering it up for the first time, the unit was not recognized over usb.
On inspection of the board and the schematics, I found the 3.3v power controller was getting hot to the touch. Which I later measured to be around 130F case. Measring the resistance of the 3.3v net, I found it to be 0.8 ohms. Is this expected?
Thank you in advance for your help.

Kg6pgk
 
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Re: Teensy 3.2 not recognized on USB

by adafruit_support_mike on Tue Apr 09, 2019 12:43 am

That sounds like the voltage regulator was at least under a lot of stress.

Post a photo showing your hardware and connections and we'll take a look. 800x600 images usually work best.

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Re: Teensy 3.2 not recognized on USB

by Kg6pgk on Tue Apr 09, 2019 11:30 am

No external connections except the USB (please refer to the attached picture).
Attachments
0408191800.jpg
0408191800.jpg (495.51 KiB) Viewed 88 times

Kg6pgk
 
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Re: Teensy 3.2 not recognized on USB

by adafruit_support_mike on Wed Apr 10, 2019 12:46 pm

Thank you. That sounds like an early component failure.

Send a note containing a link to this page and your order number to support@adafruit.com. The folks there will get you a replacement Teensy.

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Re: Teensy 3.2 not recognized on USB

by Kg6pgk on Thu Apr 11, 2019 1:30 am

Thank you, @adafruit_support_mike. for all your help.

Kg6pgk
 
Posts: 3
Joined: Mon Apr 08, 2019 7:17 pm

Please be positive and constructive with your questions and comments.