Got this HP 54501, raster based CRT scope Indications are that the NVRAM ch ip, which is more of an assembly because it has an internal battery has die d. That is most likely due to the battery.
The battery has a connection to pins on it. ;the presumption at this time i s the battery is in too poor state of charge to operate the chip. This has all the setup information in it so it is not likely to work with it in a de ad state.
There has been some speculation about just taking the proper voltage to tho se IC pins. I think if we got access to that all it would take is a battery and two wires.
Here is a thread on it from snipped-for-privacy@groups.io;
They describe a similar situation with the Tek 2432 and 2440.
In this, the chip is described as;
Dallas DS 1235YW-120
One guy mentions the exact number in the Tek, so obviously the data will no t be right, plus the calibration information will be who knows.
I say keep the calibration. For example an old bigscreen, well not that old old. Had some bad things going on in the convergence, they said "Just chan ge it, throw that one in and align it". Bullshit, I took the parts out of t he boneyard replacement and fixed the original and when I put it in the con vergence was perfect, as if it had never been touched.
So I think that would be best for this. Just give it the damn voltage it wa nts. It works, evleybody appy !
What are the odds ? I will do anything within reason, up to maybe a Joule t hief with a warning beeper.