Seeking hex files for Iwatsu DS-8631 Scope.

[Uffe Bærentsen]

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.

 

[JW]

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.

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.

 

[Uffe Bærentsen]

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...

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

Good luck.

Thanks, think I'll be needing it

 

[JW]

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

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.