Hi guys I'd like to share my experience with my new DSO2C10, which I bought on 20.04.2021 from Aliexpress for 202$.
When I received it it was showing : Software-1.0.1.1.0(20210416.00),hardware-000........000,Firmware-3200. After the
latest update I downloaded from the Hantek site , which was 20210416, firmware changed to 3000 and calibration broke
giving every time error 511d1 when I try to caliblrate, then I did the following thing to restore it and even make it DSO2D15.
First I opened it to confirm the mainboard is model DSO2D15_V1.7 2021.1.14 and all parts regarding GEN are present.
Second I downloaded from
https://drive.google.com/drive/folders/1Tqk8YbL_M3S0vtk7h_cZ-01U2idIaqqx, provided by "DavidAlfa"
"filesystem_20210416 backup" , "do_other_update(Restore filesystem)" from scripts forlder and "dso3kb_20210510" from
firmware folder, all these files unzipped on root dir of usbdrive.
Rename "do_other_update(Restore filesystem)" to "do_other_update"
Create folder "backup"insert in this folder unzipped "filesystem_20210416" and raname it to "filesystem"
in "filesystem" folder find two files (sys_inf.new and system.inf) and edit them with Notepad++ as described earlier
to give it model 2D15, serno (yours) ,maker(hantek) and pcb 000...001 , then save both files, insert usbdisk and make
firmware upgrd, after finish restart and you got 2D15, but still calibration don't work and gives error 511d1.
Unzip firmware "dso3kb_20210510" and make the upgrade, after finish you can go thrue calibration with no problem, remember
to remove any leads from the device before calibration.
Now the only problem remain for me is the noise the device have, which is unacceplable. My suspect for that noise is
the internal switched power supply, but will take some time to create and install analog power supply and check.
At the same time I bought Fnirsi1014D scope, which uses power adapter 5V/2A far enough from the device, this one don't have
such noise and the line is "clear" like it should be.
The generator works fine at output levels above 500mV, below this the sinusoide is "stepped".