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| I broke the hantek DSO2C15 |
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| eospss:
I always felt like this scope was unstable and when I took the machine apart I found that the Lemontree 2090 had a rough welding. Some of the pins felt like they were only halfway touching the pads, so I decided to remove the chip and resolder it. Unfortunately, I did not master the stability and directness when removing the chip, which caused the Lemontree 2090 to be damaged. After booting, the machine freezes after initialization. There is no Lemontree 2090 for sale right now and I am looking for a replacement chip. Is anyone willing to provide relevant information? Thanks |
| Algoma:
Review the post by David Alpha for more info about the chip. https://www.eevblog.com/forum/testgear/hacking-the-dso2x1x/msg3603156/#msg3603156 I'm not certain there is a direct replacement available, some have requested a replacement mainboard from Hantek Support. Some of these large chips are already over half the cost of the scope to buy them from an available suppliers. |
| pcprogrammer:
The ID within the bit stream shows it being a Gowin FPGA, but not precisely which one. It has to do with the memory within the chip. But it might be easy and cheap to find a replacement within China. I did find this website where they seem to be about 10 bucks US. I believe it to be the one with the 64Mb of SDR memory. Take a look at the schematics I made. Or read more about the journey of making them. |
| DavidAlfa:
As per the datasheet and the JTAG ID, likely a GW2AR-18-144. https://www.eevblog.com/forum/testgear/hacking-the-dso2x1x/msg3598420/#msg3598420 Check this datasheet, also this one. However, there are several types, at least: GW2AR-LV18LQ144C7/I6 GW2AR-LV18LQ144C8/I7 GW2AR-LV18EQ144C7/I6 GW2AR-LV18EQ144C8/I7 GW2AR-LV18EQ144PC7/I6 GW2AR-LV18EQ144PC8/I7 Which one is actually used here, I don't now. LQ / EQ refers to the package : --- Quote ---LQ LQFP, Low-profile Quad Flat Package EQ ELQFP, E-pad Low-profile Quad Flat Package --- End quote --- The "P" (144P) refers to the memory type: Maybe this "Lemontree" is a custom device, having 128MBit DDR RAM in a 144-pin package? Rest is speed grade and temperature range: This guy replaced it, but either did a bad job or the replacement device was defective/incorrect: https://www.eevblog.com/forum/testgear/new-hantek-dso2x1x-models/msg4899533/#msg4899533 https://www.eevblog.com/forum/testgear/new-hantek-dso2x1x-models/msg4798610/#msg4798610 I'd take the fastest grade for sure. The package should be "EQ" (Bottom gnd pad). Only the memory type remains unknown. |
| ebastler:
--- Quote from: eospss on November 26, 2023, 04:22:15 am ---I decided to remove the chip and resolder it. Unfortunately, I did not master the stability and directness when removing the chip, which caused the Lemontree 2090 to be damaged. --- End quote --- Let's assume that the factory soldering was indeed not done right. Even in that case, unsoldering the chip was not necessary at all. You should just have added some flux and carefully re-soldered the connections. Since you are apparently not too experienced with soldering these fine-pitch chips: How sure are you that your new solder joints are all good, and that there are no solder bridges? If you have not done so yet, please inspect all joints closely under a microscope. If you find suspicious joints, add flux and re-solder them. Maybe the Lemontree chip is not damaged after all, and you can still fix your scope by cleaning up the soldering. Fingers crossed! |
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