Discussion about the Korg PolySix synthesizer

so... just going through a tune up (sounds better tuned already after doing the resonance offsets)... and am a bit confused about which trimmer to use. For CN05-11 it says to use the vcf res trimmer but for CN05-7 it just says 'adjust'... ro 0.00v ... does anyone have a clue what im supposed to ne adjusting here?? thanks much.