Products > Test Equipment
SDS7102 no buttons or trigger working anymore
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tomatos666:

Hello,

I'm not sure if anyone is reading this, but I'll provide an update.
Using JTAG, I managed to read the memory to check if the NAND has many defective blocks.
After several attempts, I succeeded.
I found information on this at the following page:
https://radiokot.ru/forum/viewtopic.php?f=10&t=70052&start=520
The NAND has only one defective block, 0165. As far as I found out, having 1-2 defective blocks in the NAND is not a problem.
Subsequently, I completely erased the NAND and overwrote it with another NAND dump.
I then performed updates and calibration.
The buttons are working again, and the measurements are displayed correctly.
Apparently, the NAND had a faulty program. Whether it was just a random error or indicates an impending defect, I cannot say. At the moment, the oscilloscope is functioning.
How long it will continue working is another matter.
If the problems occur again, I will replace the NAND.
tomatos666:

--- Quote from: jmakivir on October 15, 2023, 01:11:16 pm ---Hi,
I have the same problem which appeared after the scope sat unused for a while. I too started by checking that flat flex cable but couldn't find any obvious problems with it.
I also checked the small lithium battery on the main board with a DMM and it was completely drained. I don't know whether or not that battery is used for storing the settings or is it just for the clock, but I'm wondering if it might be possible that this problem is caused by some weird firmware bug related to the scope failing to restore some settings to their defaults. Unfortunately I don't remember my firmware version but the SN / batch number is in the 1203xxx range.
Have you checked the state of that backup battery in your scope?

--- End quote ---
Hello jmakivir

After all attempts were unsuccessful, I noticed something yesterday. The oscilloscope started working. The battery voltage was 2.65V, but then suddenly the battery voltage dropped and the buttons stopped working. I tried charging the battery with a power supply. However, only the CPU became lukewarm, and the battery voltage dropped completely to 0.

I believe the CPU has a defect. I can't say exactly what the problem is, but I can say that the malfunction of the buttons is clearly related to the discharge of the battery.

Perhaps someone has an idea. The CPU likely cannot be easily replaced.
tomatos666:
Update:
I have now replaced the CPU, but unfortunately, it didn't resolve the issue.
The problem persists, and none of the buttons or switches are working.
Additionally, the oscilloscope is not being recognized by the PC via USB.
There must be a connection between these issues.
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