There is a lot of material out there for this synth.  Here are some links.  Will update as I find other noteworthy things.

• Nord legacy product page
• Nord OS, Software and Manual Downloads
• Nord spare parts list 2023(PDF) and 2024. Covers all Nord products, but super helpful for looking up part numbers and seeing what parts are using across different synths. I suspect this is for their support and distribution channels only, as when I attempted to order parts I was directed to local distribution which was charging 4x or more vs what's in here.  I might try if they'll let me order front them as a local in Sweden if they'll sell for the listed prices.
• Nord spare parts comparison chart 2024(PDF).  Handy for some part numbers and what boards are used in what synths
• Advanced Programming Techniques for Modular Synthesizers(PDF), James Clark 2003
• Wizoo Guide, Nord Modular 2nd edition (PDF), Peter Gorges, Len Sasso 2000.
• Someone else's page with info on replacing the wheel encoder and fixing buttons. (It's fascinating that this person's front panel board has the same name(Manuel)  and date(98-10-14) on the test/assembly sticker)