How can I access the sled movement in a Goodmans Gps 285DAB player?

My CD only plays the 1st couple of tracks on all CD's then stops and makes a grating sound. I suspect it is a problem with the drive that move the laser along the disc, probably dirty or something. i've taken the back/top apart but I still cannot access the drive without major removal of the electronics. Surely there's an easier way to clean this area.

Chris Upton
February 2010