Products > Test Equipment
Hantek 2000 series - 2C42/2C72/2D42/2D72
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Microcheap:
The LTRA is indeed a LT1931 and your voltages are fine. Hantek is using lower voltages to apparently save some battery. That was discussed earlier in this thread.

Check all resistor and diodes around U4 and see if they are all fine but it's likely that U4 is gone.


The DMM chipset is the CS7721CN from Semico and I don't think you can find it to buy in small volume (I couldn't find). You can try to contact Hantek but if they can't help you, I still have here some chips they sent me some time ago. I have no idea how much it would cost to ship it to Spain but it shouldn't be that expensive.
masta_k74:
I don't know if this is relevant to anyone here, but there is now relatively good firmware for the 2D72 from Joy-It. German, English and French can be selected as languages. I have not found anything negative about it so far.
For me, it works much better then the original Firmware from Hantek.
You can find it on this page, bottom right: https://joy-it.net/en/products/JT-DMSO2D72
jorgemef:
Are those TFT screens available somewhere? My 2C42 developed a vertical line just 2 months after purchasing it. Got very little use in fact.
Model of LCD is FPC-TFT028F014.V0. Cannot find it on Aliexpress or so.
Microcheap:
Yes, those are standard 2.8" TFT display with a 40pin flat cable. I think the controller is ILI9341 compatible.

I have a tray of them left here:



I'm not 100% sure, but I think the second option from this seller could fit: https://www.aliexpress.com/item/32862869103.html
jorgemef:
Hantek through Aliexpress support sent me a new screen as was under warranty. I replaced it and is working like a charm now.  :-+
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