how can i fix my z-2600 aiwa?

My father has a Aiwa Z-M2600. (Bought in 1998).

Although the CD player can play CDs, it does not recognise every CD out of the 5 which can be held at any one time on the "Direct Disk Play/Rotary Changer System".

I intend to remove the outer casing and see if perhaps there is a sensor which is most probably coated in dust. If so I will clean it, if not I will have to come up with another plan.

Other suggestions appreciated.

Aberdeen Fan
July 2012