[MinnowBoard] USB Problems

[Anders, David]

Sydney,

You can locate the specific information from the Bill-of-Materials and schematics located on the elinux.org wiki page. A suitable replacement for the F1 fuse can be found at Digikey and Mouser:

http://www.mouser.com/ProductDetail/Vishay-Beyschlag/MFU0805FF02000P100/?qs=sGAEpiMZZMtxU2g%2f1juGqSXhszlzumH5Q%2fbSMn6EZQ0%3d

http://www.digikey.com/product-detail/en/MFU0805FF02000P100/MFU08052.00CT-ND/1206551

key specifications:

0805 package
2A
32V

Please note, that replacing the fuse yourself will void the warranty of the board.

Dave

From: elinux-MinnowBoard [mailto:elinux-minnowboard-bounces at lists.elinux.org] On Behalf Of Sydney Lybert
Sent: Thursday, July 2, 2015 2:57 PM
To: MinnowBoard Development and Community Discussion
Subject: Re: [MinnowBoard] USB Problems


Does anyone happen to know exactly what sort of fuse it is?



-Sydney

________________________________
From: elinux-MinnowBoard <elinux-minnowboard-bounces at lists.elinux.org<mailto:elinux-minnowboard-bounces at lists.elinux.org>> on behalf of Ferchu R <chamac2 at gmail.com<mailto:chamac2 at gmail.com>>
Sent: Wednesday, July 1, 2015 11:15 PM
To: MinnowBoard Development and Community Discussion
Subject: Re: [MinnowBoard] USB Problems

Why F1 can not be shorted as a regular fuse?. I know F1 was put there for a reason, but most switched power supplies have overcurrent protection, so connectiong a very havy load to the USB should only result in the power supply going off as protection.

2015-07-01 17:54 GMT-05:00 John Hawley <john.hawley at intel.com<mailto:john.hawley at intel.com>>:
As was suggested, the likely cause is a blown F1 (from what we've seen).
 The fuse can be found on the top of the board near the USB connectors,
opposite side from the sd-card cage.  It's a little blue thing with an
"N" on it.  If you have a multimeter, you can check if there's any
voltage across the line while the board is on, to see if it's blown (and
something I'd recommend before considering an RMA or attempting to
repair it yourself).

Although it is possible to replace it with another 1.5A - 2A fuse of the
same size (it has to be soldered), be aware that doing so will  void
your manufacturer's warranty.

If you've been able to confirm that F1 is in fact blown, I'd recommend
going through the RMA process as your first option.

- John 'Warthog9' Hawley

On 07/01/2015 02:42 PM, Ferchu R wrote:
> I had the same issue as Peter (broken F1). At the time, the only
> walkaround was using a powered USB Hub. I asked on this board how can I
> get the board back to its functionality, but sadly I was not given any
> advice, even from CircuitCo.
>
>
>
> 2015-07-01 14:58 GMT-05:00 peter <peter.bolch at t-online.de<mailto:peter.bolch at t-online.de>
> <mailto:peter.bolch at t-online.de<mailto:peter.bolch at t-online.de>>>:
>
>     Hi Sidney,
>
>     I had the same effect with my Minnow Board. Someone here suggested
>     to check fuse F1 (to the left of the USB connector). It was blown
>     although there was just a keyboard connected to the board.
>
>     Peter
>
>
>     On 01.07.2015 21:15, Sydney Lybert wrote:
>
>         Hello,
>
>
>         I recently purchased a Minnowboard. I was attempting to install
>         an OS on
>         it (Ubuntu 14.04.2). During the installation, it suddenly died,
>         and now
>         the USB connections won't pick up any USB devices. Any ideas why
>         this
>         would happen? I've tried disconnecting the power and restarting
>         everything with the USB devices already connected, and I've tried
>         powering on the board and then connecting the devices, to no avail.
>
>
>         Thanks,
>
>         -Sydney Lybert
>
>
>
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