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.
-- 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...
Good luck.
"JW" skrev i en meddelelse news: snipped-for-privacy@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
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.
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