I know this is an old question but my KDC-PS9060R just failed because of a broken ribbon cable. Open up the case (one screw, lift off the panel), remove the CD player (3 screws, be careful of the attached ribbon cable), release the ribbon cable latches (use a small flat screwdriver to slide the plastic lug/pins towards the cable), remove the mask faceplate (two small screws one at each end). The front of my faceplate has a plastic panel that is glued on and covers the screws and hidden micro-switch. Lift off the plastic cover carefully to avoid damage, undo the 4 screws. Release the ribbon cable in the faceplate from the circuit board. Mine was labelled with the part number J84-0061-33 - found a new one on ebay for £7. Good luck!
Richard, September 2013