My car CD Pioneer SuperTunerIII D,that I bought recentry,It works well at first,One day it only play with bass speaker,other speakers no sound after my car was loaned my friends,I asked him how it was,He said nothing,but only touch several keys.I haven't handbook of it,The faceplate is English,But myfriend and I did not know it,I am Chinese.i don't know how to set.Thanks a lot.