HP SCOPE
Some more... now the I/O Module at the back !
Cracked it open. There are 5 tantalum caps in there... ... and two NVRAM chips, because one is not enough. There is the usual one made by Dallas, P/N DS1244Y-120 The other one is made by ST, P/N M48Z128Y-120PM1
I guess I could download their datasheet, see which pin if any, gives access to the internal battyery voltage, so I can measure it and get a feel for just how scared I should be... OK that's it for to "day".. soon 2AM, going to bed. ![Indifferent :=\](https://www.eevblog.com/forum/Smileys/default/indifferent0023.gif)
More HP fun tomorrow of course, that goes without saying !!!
Don't like it ? Too bad, it's TE, it's on topic, so you can't complain, sorry ! ![Laughing :-DD](https://www.eevblog.com/forum/Smileys/default/smiley_laughing.gif)
![](https://www.eevblog.com/forum/testgear/test-equipment-anonymous-(tea)-group-therapy-thread/?action=dlattach;attach=1513252;image)
![](https://www.eevblog.com/forum/testgear/test-equipment-anonymous-(tea)-group-therapy-thread/?action=dlattach;attach=1513765;image)
I had to pop the cover off my 54657A to iron out this hickey:
![](https://www.eevblog.com/forum/testgear/test-equipment-anonymous-(tea)-group-therapy-thread/?action=dlattach;attach=1475995;image)
in the shell, so I took a couple pix of the inside for comparison and future reference.
Yup... DALLAS DS1244Y-120 & DS1245Y-120; I read the date as 2002, so maybe a few more years if I'm
really lucky.
Ghaaaah. ~$90 just for the two NVRAM, then I need to get a
working programmer.
*sigh* I also need to do the same thing with the NVRAM in my 3478A...
![Face Palm :palm:](https://www.eevblog.com/forum/Smileys/default/facepalm.gif)
Nope. If I'm gonna spend that money, it'll be on the 54659A I actually
want on my scope, not this module that I bought just cuz it was cheap and right there.
I'm just gonna button this one up and use it til it loses its mind.
![Undecided :-\](https://www.eevblog.com/forum/Smileys/default/undecided.gif)
mnem
*tinker-tinker... putter-putter...*