OT - Mini-Disc help

[Bobdog/Doghouse Audio Laboratory <psbuddha@texas.net>]

hi all -

i've just picked up a sony minidisc walkman model mz-r30 & am having a
problem.

i can't find the manual (i know the fella i got it from gave me one,
but...) & need to find out if there is a trick for setting the mic input
levels other than the 2 position switch (high/low) on the back.the
lamest of mics overloads it the way it's set now even in the low
setting.

thanks,

bobdog