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Subject: Re: Sansa AMS/Fuze v2 unbrick

Re: Sansa AMS/Fuze v2 unbrick

From: Rafaël Carré <rafael.carre_at_gmail.com>
Date: Sat, 17 Apr 2010 14:07:53 +0200

On Sat, 17 Apr 2010 06:38:39 -0400
CS Tech <cs.tech_at_comcast.net> wrote:

Hello,

> Hello all... I was reading the following page at RockBox and wanted
> to share some information about it:

> http://www.rockbox.org/wiki/SansaAMS#Unbricking

> I have a Sansa Fuze (v2) which fell into water. I opened the case &
> dried the circuit board. The battery is good (3.75v) but the flash
> memory is corrupted and will not boot. When power-on the display is
> 100% black. When connected to a Mac, the Fuze presents as a USB
> disk with name:
>
> "4.2 MB UNDEF storage media"

The Clip+ shows a ~4MB device too, I don't remember the exact size but
I would think it's the same.

> I think the device is in PRE-BOOT mode.
>
> Maybe there is a secret way to unbrick an AMS Sansa without JTAG by
> shorting pins--and these pins shorted by accident in the water,
> erasing the Flash chip. This caused the device to enter PRE-BOOT
> mode… ?

It would be nice, but the firmware is bigger than 4MB.

On e200v2, the mass storage device is mapped to the OF, this means you
can write a new OF to it, AND read back the OF which was previously
written.

> Since the status is Read/Write, can I now use e200tool on the Fuze?
> ________
>
> I also have some questions about this:
>
> "You should never, EVER EVER need an i2c.bin unless your player
> no longer boots to anything except a pure black screen"
>
> " http://daniel.haxx.se/sansa/e200tool/i2c-e280.bin should be the
> same for all the e200 series, as they all use the same I2C "
>
> http://www.anythingbutipod.com/forum/showthread.php?t=22225
> ________
>
> So now I wonder:
>
> Does the Fuze v2 use same I2C as the e200?
> And where can I find an I2C dump for the Fuze v2?

The Fuzev2 only shares the audio codec, power management unit, and LCD
controller with e200v1 (for which e200tool is written), so you can't use
e200tool.

>
> I hope this information is useful to others and would appreciate any
> comments/ideas/suggestions

The best you could do is keep the working parts to repair another Fuzev2

-- 
Rafaël Carré

Received on 2010-04-17

Page was last modified "Jan 10 2012" The Rockbox Crew
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