Products > Test Equipment
I broke the hantek DSO2C15
eospss:
--- Quote from: pcprogrammer on November 27, 2023, 06:16:13 am ---I'm not sure which one it actually is. It depends on the type of memory in it and if there is a ground pad underneath the chip. (P or no P), (LQ or EQ)
The other chip is the ADC for converting the analog signal into the digital values. The consensus is that it is an ADC08D500.
--- End quote ---
During the soldering process, I felt that the lower part of the chip should be grounded, because I used an air gun to heat the pins and gently lifted one corner with tweezers, only a little at a time. The temperature of the air gun reached 400°C and the chip still could not be removed. So I feel like there should be a ground pad underneath the chip.
pcprogrammer:
In the case of a ground pad the EQ type should be used. Still leaves the question of the memory type.
eospss:
--- Quote from: pcprogrammer on November 28, 2023, 07:30:10 am ---In the case of a ground pad the EQ type should be used. Still leaves the question of the memory type.
--- End quote ---
Someone mentioned that there were functional issues after replacing the GW2AR-LV18EQ144PC8, which uses PSRAM. So I think it should be GW2AR-LV18EQ144C8/I7, and I happened to see it on sale online. I plan to practice soldering first and completely remove the previous chip. Then buy a GW2AR-LV18EQ144C8/I7 and try it. If this doesn't work, we can only think that Lemontree is a custom chip. This process may take some time, after all, GW2AR-LV18EQ144C8/I7 is not cheap. Not sure what the impact would be if I didn't solder the ground pad. I also need to buy solder paste if I have to solder the ground pad. I actually don't want to invest more in a scope that has little hope of repair.
DavidAlfa:
Sorry to say it like this, but it seems you simply skipped any reading here or in 4pda.ru and went on your own taking the worst route without proper skills/equipment.
If you failed at soldering some pins, replacing the entire IC doesn't look good!
Probably there was nothing wrong with it in first place, maybe just lacking updates, or old FW version.
Sometimes it will randomly hang, specially on long runs, it's simply impossible to run it for two hours straight without crashing.
* It's just Hantek *.
eospss:
--- Quote from: DavidAlfa on November 28, 2023, 02:41:23 pm ---Sorry to say it like this, but it seems you simply skipped any reading here or in 4pda.ru and went on your own taking the worst route without proper skills/equipment.
If you failed at soldering some pins, replacing the entire IC doesn't look good!
Probably there was nothing wrong with it in first place, maybe just lacking updates, or old FW version.
Sometimes it will randomly hang, specially on long runs, it's simply impossible to run it for two hours straight without crashing.
* It's just Hantek *.
--- End quote ---
I already had some premonitions while trying to remove the chip. The chip removal was not smooth. The air gun temperature remains at 400°C for too long. In the end, it was still not completely disassembled. Then I realized there might be a ground pad underneath the chip. I put the chip back together and checked the pins to make sure there were no false solders or solder bridge on the pins.
Before removing the chip, I pressed the corners of the PBC with my hands to cause some deformation. I found that the waveform was normal and the displayed values were also normal. This gave me the idea of soldering fpga.
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