In a car CD changer, various conditions occur which are frequently misconstrued as faults. Many phenomena are, however, system-related and therefore cannot be avoided.
The mechanical part of the CD changer must be spring-mounted, however, it must not vibrate but rather it must take up (dampen) impact. For instance, unevenness in the road surface can be compensated for in this way.
The CDs are held in a 6-compartment magazine. Only the CD which is to be played is located completely within the mechanical part. The CD is transported from the magazine into the play position by means of 2 rubber rollers which pull the CD out of the magazine. Once the CD has reached the play position, it is lowered and fixed on a cone in the center hole (clamping). Playback can now begin. The CD is transported back into the magazine in the reverse order. 3 photoelectric barriers are installed in the changer in order to determine the CD's position within the mechanical part. The position of the disk can be determined exactly by the sequence, in which these photoelectric barriers are interrupted.