HP54501A repair complications - & what id I sub a DS1225 NVRAM for the DS1235?

[mr_coffee]

I have managed to remove the DS1235 NVSRAM without destroying the PCB which was no easy job as it is a through-hole PCB!!!), and installed a socket.

Unfortunately, a couple of pins broke off the old DS1235 in the process, and when I attempted surgery on the module, I found that the most easily accessed battery of the two in the module then went from reading 1.2 volts to reading 2.4 volts when I disconnected the positive battery terminal from the internal DS1210 chip (I disconnected the nickel strap from the positive contact of the battery mechanically).

My assumption is that means the sram or nv controller is bad, and not just the batteries in the DS1235. Reasonable?

I have an OLD DS1225 (64K) nvram module in my stash, and wondered if ALL that NVSRAM was really used just to store calibration data, or if perhaps much of it was for other purposes (like wave form storage and such), ... and thus, wishful thinking perhaps, I thought maybe I should stick the DS1225 in the socket and l\boot it up...

And THEN, it crossed my mind that I might perhaps damage some other part of the 'scope in the process, and not just get an error message...\

So guys, you who know WAY more about this stuff than me, PLEASE PLEASE share what you know or even just THINK about trying the DS1225

THANKS SO MUCH FOR ALL YOUR HELP SO FAR, and in advance.

[m k]

Check FRAM Adapter.