Seeking hex files for Iwatsu DS-8631 Scope.

Mon May 24, 2010 12:08 pm   

Hi there

Anyone know where I can get images of the 3 EPROM's for an Iwatsu DS-8631
scope?
Have a programmer and new EPROM's (27C 1meg).
I suspect that mine has gone bad.
at first the scope said checksum error and now it won't start at all :-(

Any pointer with the right direction will be appreciated.


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Uffe Bærentsen

Mon May 24, 2010 12:47 pm   

On Mon, 24 May 2010 13:08:40 +0200 "Uffe Bærentsen"
<leiti_NOSPAM__at_hotmail.com> wrote in Message id:
<4bfa5e38$0$56782$edfadb0f_at_dtext02.news.tele.dk>:


Can't help you with that particular scope, but from time to time I've been
successful recovering the data from a "slightly" defective programmable
device by lowering it's supply voltage a bit from spec while reading back
in a programmer. You might find that at around 4.5 volts or so, you can
read back the data. Takes a bit of experimentation, but you can't make
things any worse...

Good luck.

Mon May 24, 2010 5:43 pm   

"JW" <none_at_dev.null> skrev i en meddelelse
news:mgpkv5titmeal2a8eqcjhlj7ikqbp3hjp1_at_4ax.com...


I will try to figure out how I do that on my Willem programmer (PCB35A or
PCB3B



Thanks, think I'll be needing it :-)



--
Uffe Bærentsen

Tue May 25, 2010 10:49 am   

On Mon, 24 May 2010 18:43:14 +0200 "Uffe Bærentsen"
<leiti_NOSPAM__at_hotmail.com> wrote in Message id:
<4bfaaca1$0$56772$edfadb0f_at_dtext02.news.tele.dk>:


Pretty easy to do. Connect the positive lead of a variable power supply to
the isolated VCC pin of the device, and connect the - lead of the supply
to the device GND. You can use a socket with the VCC pin removed to
isolate.