Hi all...I am looking for thoughts on programming the Dallas chip for a Tektronix 2445B. I know there are several posts on this subject however my mind is muddled with all of the moving parts, so here is my situation. I have completed the A5 leaky capacitor repair issue and have replaced some of the power supply capacitors. The scope seems to work fine once it is out of the startup error screen. On startup the error that I see is "test 04 fail 01" which I understand to be a calibrate error. Well, no surprise there as this scope is a 1991 build and the Dallas battery has never been replaced (when I display test 2 data I just see strings on the same data, 07F4 and F407) so I know the calibration data is gone. Here is what I am planning and I'd like to here some thoughts.
1) I have received a new Dallas (Maxim) chip from Mouser (DS1225AD-200+) which I will be installing on a socket.
2) I copied the Test 02 address/parameters from a working 2445B Youtube video (yes, I did indeed transcribe 256 locations...thank you kind Youtuber!).
3) Using the copied parameters I created a .bin file.
3) I purchased a V12.63 Original VGecu T48 (Tl866-3G) Programmer (which I am hoping will work). Using this programmer I will upload the .bin file to the new Dallas chip.
I do realize that the calibration will not be correct for my scope. My thinking is that as long as there is calibration data present the scope should startup and pass the self test routines. For my purpose I am not concerned about calibration so long as it's close enough. I suppose that if I am not concerned about calibration I could just leave the old Dallas chip in place but this is something that I just want to do as I learn a lot in the process. Plus it is fun working on these old platforms as you can most often find manuals and parts and it would be a shame to toss it in the trash.
I do welcome all thoughts/advise.
Thanks!