Introduction
Tools
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            Remove the 8 screws on the bottom. Ensure that you have the right screwdriver bit, and that you go slowly and use enough force to turn the screw without stripping it. 
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            (Serial numbers and personal info removed from picture) 
 
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            You can now remove the main circuit board, lifting out the left side first. (as the mini-USB port may hold the right side in.) 
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            The rubber buttons can now easily come out. 
 
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            Features: (first picture) 
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            8 faders 
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            8 potentiometers 
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            8 x Solo, Mute, Record buttons 
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            5 + 4 transport buttons 
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            2 track buttons 
 
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            Chips 
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            Labelled with: 2210CFP24V H8S/2210C TH30140 1325 
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            ROSON Crystal oscillator, labelled with 24.000F20 HO 
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            LW051A 58A04 P256 Texas Instruments Analog multiplexer 
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            Mini-usb port 
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            Power indicator LED 
 
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To reassemble your device, follow these instructions in reverse order.
8 comments
Hi do you think it’s possible to replace the mini usb port on this, with a usb c connector bought online? I actually have a Korg Nanokey 2 but I think it’s the same setup.
Lemo -
Technically yes, but it won’t be easy as the pins are probably in different locations. There are only 4 pins on a USB micro B connector (not in order: Ground, 5V, D+, D-) and there are 24 on a USB C connector (12 different x2). If you have a way of connecting the right pins up then you can use a Dremel or another tool to make the connector fit through the hole if needed.
jzohsuh -
Yeah maybe I can solder it via some wires if it doesn’t fit directly. Actually I have zero experience in soldering, but I can get the stuff online, and then bring it to a shop to solder it for me I think. How about this, do you think it’s okay? https://www.aliexpress.com/item/10050014...
Lemo -
Also do you think that connector on this page is configured correctly as “host” if I buy the female port? Or I might need a resistor to change the mode similar to what he’s doing on this video? https://www.youtube.com/watch?v=V-vFtiDY...
Lemo -
Yes, that aliexpress link could work, provided you make enough space for it. For the resistor, I think it is likely that you'll have to change the mode, but you'll need to check once you've got the part.
I realise this is quite a delayed reply, sorry!
jzohsuh -
hello, my controller is corrupted (midi nano... corrupted) since a windows update, now the faders are going crazy by themselfs, i use ableton