I'll have a go!
Require the technical writers to go into the TASCAM company archives, find the owner manuals for the TASCAM M-1, M-3 and Model 30 Mixers; the 40-4, 80-8, 34-4, and 38-8 Multitrack Recorders, the excellent TEAC White Paper, and the even more excellent TEAC Multi-track Primer.
Require your technical writers learn from those gems how to write a proper, informative owner manual specific to using your products effectively, so the musicians and aspiring recording engineers that are your customer base will feel empowered and enthusiastic about creating music, rather than being confused and frustrated, as many now are, due to the mediocre quality of your current owner manuals.