The document is an owner's manual covering two specific models of Yamaha compact disc players: the CDX-520 and the CDX-420. It outlines key differences between the units, such as the inclusion of a remote control transmitter and digital output terminals on the CDX-520 model only.
Wipe the disc surface with a clean, dry cloth straight outward from the center; do not use circular motions or chemical-based liquids.
The unit will play standard compact discs and 3-inch (8-cm) compact discs.
Open the case, press down at the center with a finger through the hole, and lift the disc out carefully while holding the outer edges.
Use a clean, dry cloth and wipe straight outward from the center, never in a circular motion.