Re: [SoundDiver] Re: AMT8 Not Working

Hi,
I don't know if this sheds any light, but some time back I bought a Korg DSS1, hooked it up to my UM880 and the port it was on was continuously lit solid.  Midi didn't work at all.  It turned out, the circuit board the midi jack was on was damaged.  Changed the board and all was fine.  
 

--- On Thu, 6/30/11, Peter P Sturges <[email protected]> wrote:


From: Peter P Sturges <[email protected]>
Subject: Re: [SoundDiver] Re: AMT8 Not Working
To: [email protected]
Date: Thursday, June 30, 2011, 5:28 PM


  



I repeated this several times.

I hooked up the AMT8 to the Mac and powered up. The LEDs strobe from 1 to 8
(both in and out at the same time) on startup, but ends up LED 1 in and out
are on constantly. The Sounddiver sees that ATM8 fine, indicates the
firmware version etc., but there is no reset or LED blink I can find in the
SD menus. I tried the SD MIDI loopback test, there is no MIDI detected
coming in (the LEDs 1 in and out stay fully lit). Plus the panic LED came on
once or twice during the many repeats of this test.

It's got to be garbage in the EPROM.

Help!

Peter

On Sat, Jun 25, 2011 at 4:38 AM, dietmarbelloff <springmauser-/[email protected]>wrote:

>
>
> > I'm a tech. Always
> > the first repair strategy if there are socket-ed chips.
>
> sorry, I wasn't aware of that.
>
>
> > The thing is built like a tank, I can't image physical damage from what
> > happened. But I'll check voltages, thanks.
>
> Since the wall wart does only AC output, the complete voltage regulation is
> done on the PCB, located around the power switch. Check voltages (I only see
> one 3pin reg, so it should be an 7805) and all the mechanical components
> (these could be harmed by the drop) such as capacitors and the coil on the
> left side. The PCB has spares for another voltage reg (for Unitor8), see
> pics.
>
>
>
> > I know there's static RAM in there somewhere. I bet it's full of garbage
> and
> > needs to be purged, perhaps with a sysex string. But what?
>
> There is static RAM on the PCB, directly beneath the EPROM (6264 in the
> pics, the PCB is suited for 3 different chips and an additional flash rom
> which is in place for the Untitor8). But since there is no static battery,
> the static RAM is volatile. All setup is stored in a small EEPROM (must be
> IC37) and this could be reseted by sounddiver, Untitor 8 control (which is a
> stripped down sounddiver). There is a nice control panel for MacOSX here:
> http://www.potm.org/software/Unitor/
>
> but AFAIR with no RESET functionality. I'm looking for a doc of the sysex
> string for reseting the device.
>
> There is an LED blink code if EEPROM data is corrupt, have to look for the
> specs in my docs.
>
>
> > I may just get a MOTU 5 in 5 out, that's all I need. Cheap.
> >
> > Probably get $50 for the oddball ATM8 power adapter.
>
> Well, before you trash it you could hand the thing over to me (if you live
> in europe) :)
>
>
>
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