Eventually, my 7104 will need the same mod. The battery was replaced in my unit (by someone else) and re-flashed years ago. But my NVRAM chip isn't damaged, so it's still drawing in the nA or pA range. My scope has been apart about 5 times to undo mods, that eventually ended up making it work ok again. Thanks for sharing your video!
there is another way to mod this chip imho. not so accurate but useable if you use your scope quite often and the instrument most of the time connected to AC input, you can use a downconverter from standby to 3 VDC and apply it to dallas chip. Or maybe just put there 3V_ALWAYS from CPU board
Excellent video + each step nicely presented. I love how when people share designs for problems they have fixed (the FRAM replacement board) it can pop up in so many other places to help others fix more kit :) Keep up the good work.
Nice repair. I ordered 5 of a very large PCB design for a retro computing design I was working on. For some reason I also received 10 boards in the mail. I didn't complain especially as each board was over 100 sq inches in size. I used one and sold a pair to a guy in the UK for the cost of shipping.
So cool. I did the same to my Korg M1 synth. Was tired of changing the battery all the time. But I used Cypress nvSRAM chips. Using FRAM is even cooler.
How I love this videos with replace some original parts with custom solution, and also measurement, agilent power supply, everything. Perfect and thanks. And more videos like that :)
Very COoL. Love the "classics" (no, not referring to you:). I'll always think of scopes like this as ShOcK & AWE technology. Would still take one in a heartbeat. Of course I'd tell tell the owner first. You R the "Classic Tektronix Whisperer". Cheers from So.Ca.USA 3rd house on the left (please call before stopping by)
When I bought some PCBs from PCBWay and used them in a recent YT video, I got criticism in the comments that I was just another PCBWay huckster. They might be just a good supplier of PCBs and other services such as 3D printed or injection moulded parts. But we can't say such a thing for fear of punishment for mentioning the company at all.
I really suggest to locate every single EEPROM and flash memory on all the boards, read out and back up their contents. If this thing runs Win98, it must be close to 25 years old, which is beyond the limit when EEPROMs and flash chips can develop bit rot. I wonder how prone CPLDs and FPGAs to this. I'm afraid these digital scopes will be impossible to keep alive 30-40 years after their manufacturing date, just because of bit rot. Which is a shame, because a new scope with such specs is absolutely unaffordable to any hobbyist, even smaller businesses think twice to justify the cost. About how much these beasts go for, in working and non-working condition?
I paid about $500, so I could not resist. I see a few non-working ones, let's say, around $1000 on eBay now. Working ones are offered for $1500-2000, but who knows what they really are sold for.
@ydonl Yes, but it's very upsetting to throw away a perfectly working, advanced and expensive hardware, just because they made it impossible for the user to reprogram it. Plus not sure if it will be that simple in the future. Newer scopes are more complex, and they have the whole OS in flash memory, todays higher capacity flash roms have significantly shorter data retention time, nowadays you can't trust a high capacity USB flash drive to keep the data intact for just 5 years if not refreshed. Modern SSD controllers periodically refresh their cells to prevent bit rot, if they implement this on the scope's motherboard or they use a high quality off the shelf SSD, than it's not an issue if the scope is in regular use. The latter would be the best, because it would make backing up the OS super easy. I have an OWON DSO from around 2007, when I bought it second hand in 2020 I planned to back up the content of the flash, but it turned out to be integrated into its Samsung ARM system controller. Even if I reverse engineer the JTAG and manage to gather every dev tool that's necessary to program that controller, I will most likely be unable to back up the firmware, because it's pretty much guaranteed that the flash in it is read protected. Long story short, I will keep my analog scopes forever, because those can be kept alive practically indefinitely with the amount of use they are getting from me. I won't gamble thousands of $ on decades old high end DSOs, knowing they can fail in any moment, just from sitting on a shelf.
![ทุกครั้งที่หลับตา (Lucid Dream) - AYLA's [ Official MV ]](http://i.ytimg.com/vi/4i1OBAQyv58/mqdefault.jpg)
Eventually, my 7104 will need the same mod. The battery was replaced in my unit (by someone else) and re-flashed years ago. But my NVRAM chip isn't damaged, so it's still drawing in the nA or pA range. My scope has been apart about 5 times to undo mods, that eventually ended up making it work ok again. Thanks for sharing your video!
there is another way to mod this chip imho. not so accurate but useable
if you use your scope quite often and the instrument most of the time connected to AC input, you can use a downconverter from standby to 3 VDC and apply it to dallas chip.
Or maybe just put there 3V_ALWAYS from CPU board
Nice work!
Nice fix, and a great little module. FRAM has transformed our test instrument battery woes!
Excellent video + each step nicely presented.
I love how when people share designs for problems they have fixed (the FRAM replacement board) it can pop up in so many other places to help others fix more kit :)
Keep up the good work.
Nice repair. I ordered 5 of a very large PCB design for a retro computing design I was working on. For some reason I also received 10 boards in the mail. I didn't complain especially as each board was over 100 sq inches in size. I used one and sold a pair to a guy in the UK for the cost of shipping.
Wow, that's one nice rig, nice work!
For some reason, a big oscilloscope running windows 98 totally blows my mind
Looks like some pretty impressive folks are following your channel! Nice work. Always look forward to your next video. - JRH
So cool. I did the same to my Korg M1 synth. Was tired of changing the battery all the time. But I used Cypress nvSRAM chips. Using FRAM is even cooler.
A tiny soldering adventure.... fine work.
Awesome work, very neat and tidy. Never seen this type of NVRAM chip before.
Excellent repair. Thank you.
Well done Alexander
How I love this videos with replace some original parts with custom solution, and also measurement, agilent power supply, everything. Perfect and thanks. And more videos like that :)
Nothing can beat glory of Windows 98.
Wow, what a level. You must know a lot about this oscilloscope to find a bad battery inside a casing.
Simply wau!!! Thank you
Nice video.Please add chip remove process scienes too next videos.How remove which tools used etc.Thank you for video
thank you for video
Very COoL. Love the "classics" (no, not referring to you:). I'll always think of scopes like this as ShOcK & AWE technology. Would still take one in a heartbeat. Of course I'd tell tell the owner first. You R the "Classic Tektronix Whisperer". Cheers from So.Ca.USA 3rd house on the left (please call before stopping by)
Please join the Tektronix owners group man! It has a lot of useful infos!
Super cool !
I would love to see the soldering process as well...
Nice fix, let’s see if the rest of the scope can last that 150 years…. Maybe an SSD is next?
Congrats! Now ring Dave's shoephone to tell him!
When I bought some PCBs from PCBWay and used them in a recent YT video, I got criticism in the comments that I was just another PCBWay huckster. They might be just a good supplier of PCBs and other services such as 3D printed or injection moulded parts. But we can't say such a thing for fear of punishment for mentioning the company at all.
Fuck the haters, they are just jealous of people making money and too lazy to get out there and do the same.
Hmm myTDS7254 is still sitting in peices waiting for a second trigger chip, might be an idea to do this upgrade to it
Is there a BOM for this board? Thanks,
I don't think so, but it is quite simple.
I really suggest to locate every single EEPROM and flash memory on all the boards, read out and back up their contents. If this thing runs Win98, it must be close to 25 years old, which is beyond the limit when EEPROMs and flash chips can develop bit rot. I wonder how prone CPLDs and FPGAs to this. I'm afraid these digital scopes will be impossible to keep alive 30-40 years after their manufacturing date, just because of bit rot. Which is a shame, because a new scope with such specs is absolutely unaffordable to any hobbyist, even smaller businesses think twice to justify the cost.
About how much these beasts go for, in working and non-working condition?
I paid about $500, so I could not resist. I see a few non-working ones, let's say, around $1000 on eBay now. Working ones are offered for $1500-2000, but who knows what they really are sold for.
@@mrnmrn1 I guess one approach is to always upgrade to a scope twenty years old, instead of new!
@ydonl Yes, but it's very upsetting to throw away a perfectly working, advanced and expensive hardware, just because they made it impossible for the user to reprogram it. Plus not sure if it will be that simple in the future. Newer scopes are more complex, and they have the whole OS in flash memory, todays higher capacity flash roms have significantly shorter data retention time, nowadays you can't trust a high capacity USB flash drive to keep the data intact for just 5 years if not refreshed. Modern SSD controllers periodically refresh their cells to prevent bit rot, if they implement this on the scope's motherboard or they use a high quality off the shelf SSD, than it's not an issue if the scope is in regular use. The latter would be the best, because it would make backing up the OS super easy.
I have an OWON DSO from around 2007, when I bought it second hand in 2020 I planned to back up the content of the flash, but it turned out to be integrated into its Samsung ARM system controller. Even if I reverse engineer the JTAG and manage to gather every dev tool that's necessary to program that controller, I will most likely be unable to back up the firmware, because it's pretty much guaranteed that the flash in it is read protected.
Long story short, I will keep my analog scopes forever, because those can be kept alive practically indefinitely with the amount of use they are getting from me. I won't gamble thousands of $ on decades old high end DSOs, knowing they can fail in any moment, just from sitting on a shelf.
Energizer and Duracell are not good brands anymore :D
Fair enough; what’s your preference? :)
@ydonl that's the tricky part... Don't know... Do we have any reliable ones left? Same as Varta. It was good. 10 years ago...
@ Its a sad, sad, sad, sad world? :-(
I am not sure why I mentioned those. I might have used Sony or Sanyo or some other.