CD player with changer, function - GF82.64-P-3113-02PA

CD player control 

The CD player with changer (in the glove compartment) (A2/6) is controlled by the radio (A2) via the Digital Data Bus (D2B).

The CD player with changer (in glove compartment) (A2/6) generates messages for the following operating states:

• No magazine in CD changer
• Magazine occupation (music CDs only)
• Number of current CD
• Number of current title
• List of occupied slots (CDs)
• Number of titles per CD
• Current operating condition (play, pause, etc.)

The messages are placed on the D2B and interpreted by the radio (A2).

CD playback 

The audio data are stored digitally on the CD. The audio CD is driven by a motor in the CD player. An optical laser system scans the rotating CD without contact and converts the digital optical signals into electrical signals. Small interruptions to the data flow to the laser optics, caused by scratches or contamination on the audio CD, are subsequently interpolated by the DA converter and thus compensated for.

The electric signals are then decoded in the CD changer and transmitted via the D2B to the radio (A2) or the sound amplifier (A2/13) depending on the vehicle equipment.