Electronics > Repair
Datron 1271 repair
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rigrunner:
I've got a 1281 almost repaired. I'll dump that and compare with my 1271 when it's up and running.
TheSteve:
The dump now matches the output from the ezgpib script that pelule wrote (based off of your python code I believe). So it is odd to me they didn't match with the original python script.
rigrunner:
There are some address differences between the 1271 logic boards. One 1271 rom version matches the 1281 addresses and the other has a bank change.
Could be that, or more likely my code :)

Can you post your 1281 dump? I'll compare against my original 1271 dump.
TheSteve:
My 1281 dump is attached.

I had wanted to also use the script with a 4920M but it seems the operation of the DUMP? command is a little different. It doesn't accept arguments and just spits out cal values for the range currently selected. If you keep sending DUMP? it will increment through the cal data but doesn't seem to be able to dump the entire nvram image.
rigrunner:
Definitely different to my 1271.
I'll dump my 1281 as soon as I have it back together and compare that.

Which firmware version is your 1281 running? Mine has v3.12 on a later revision digital board. My 1271 also has the later digital board - the second of the two on Tin's page here https://xdevs.com/fix/d1281/#dig_pcb

Edit: The 1271 does something similar with the dump command if the args aren't supplied. Perhaps it's just a case of working out the correct args for the 4920M?



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