I decided to throw caution to the wind tonight and cracked open my DX1, blatently ignoring the warning sticker on the back of the DX1 that reads “Under no circumstances should this label be removed. … Tampering with or removing this label will nullify all product warranties and will likely cause your DX1 Input System to malfunction”. I'm happy to report that my DX1 is still functionaing perfectly after this procedure. The label itself is metal backed so probably does serve some purpose, personally I cut a slit into my label around the center hole (under which is a screw that needs to be removed before the unit can be opened) so that I could fold the label back down again.

Here's the numbers from the IC's on the main PCB:

SILABS F321 DCNA92 0521+

Programmable Micro-controller

Development Kit

Data Sheet, etc

72C B407

P435B MM74HCT 164M

P14SF 74AC00

Click to see full-size images (warning, 2.5mb each!)

Enjoy!