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New Hantek DSO2X1X models?
IonutL:
Thank you both for your advice, I appreciate your experience. Unfortunately for me it's not a choice, I need to revive the scope I just bought, and soldering back the memory with hot air seems to be impossible now (with the two pads exfoliated, and my soldering skills seem to be poor...).
So if I do not try with wires and some kind of socket, the scope is as good as a paperweight.
I will let you know what happens.
Best regards to all.
vistorik:
--- Quote from: IonutL on October 28, 2023, 07:33:27 pm ---soldering back the memory with hot air seems to be impossible now (with the two pads exfoliated, and my soldering skills seem to be poor...).
--- End quote ---
Such damaged pads are easily repaired using two thin wires as shown in David's photo. At least you could try this. This is better than the story with socket thing.
IonutL:
@vistorik: there is one more impediment I did not mention: the couple of W25N01GVZEIG I received from AliExpress are used ones (despite the seller said they are new!!), and the back was polished to hide the fact they were desoldered from some board. As a result, they do not adhere well to solder, I spent a few days trying to make them stick on a converter board using hot air gun and solder paste. So putting such a chip on the DSO motherboard would inevitably lead to over-heating (due to my lack of experience with hot air soldering) and more pads exfoliating, eventually desoldering other components and destroying the motherboard beyond repair.
So despite your solution being very elegant, I went on with the converter-socket-wires approach. The picture shows the hardware part of the result..
First I put a memory flashed with the image I saved with dsoflash when the scope arrived. The scope started, but the functionality was poor: buttons were sluggish, de-calibration of the input, could not save into internal memory (kind of errors I have seen previously when I started asking help in this forum).
Then I put another memory (huh, this is one advantage of having a socket - could change the memory very easy!) and flashed the scope using platform tools in FEL mode. Scope started and was working much better, then I upgraded to the latest firmware from Hantek website, calibrated, and all works well now. I tried to set the serial number and board ID using the upks created when I ran Backup builder when I received the scope, but I got error -3 (and this error appeared on any upgrade with a package from that Backup builder created set. Finally I managed to change those two using commands in Keysight IO Monitor (PRIVate:SET:SERIal and PRIVate:SET:PCB).
So I would say that it is still a success. I can use this scope for visual inspection of waveforms and will not trust this scope for exact measurements, but at least I did not loose all the money, which is something! And all this is due to you all who worked to decipher the intricacies of this scope and share this information with us.
Thank you all !
DavidAlfa:
Error -3?
Make sure you're placing the upk files at the root of the USB drive, better avoid folders, absolutely avoid spaces in folders or filenames, always use safe drive extraction.
Also, place a small decoupling cap in the socket pins to compensate the long wires, the usual 100nF should do it.
The only thing you can really lose is the generator amplitude calibration, the scope channels will work fine after running a calibration procedure, so relax, you can trust it.
Still, I don't think the upk backups are broken, I can check them if you send them to me.
IonutL:
It turns out that the generator calibration is fine, I checked it at 1kHz and 100kHz, for 1.5 and 6V amplitude and for all the waveforms it can provide - it seems that the amplitude and frequencies are ok (at least gross values, not talking about mVolts).
As for upks all conditions were met. I unpacked the dso3kb_CNxxxxxxxxx.upk and all the files are ok, they are even exact content with the other backup by backup builder I took with the new memory chip and after setting everything up - all files within the upk are identical.
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