Radio, Stereo, and Compact Disc: Description and Operation

RADIO

The Radio incorporates most of the circuitry found in an ordinary radio including the tuner and amplifier. Instead of manually operated controls, however, it utilizes a data input/output port to control its functions. Signals are sent to this port from the Radio Control Head. The Radio responds to these signals by adjusting frequency, changing its output to the speakers and so on.

RADIO CONTROL HEAD

The Radio Control Head contains all the control switches and the display. It controls the Radio by sending signals to it, causing the Radio to adjust its output accordingly. The Radio Control head displays the selected receiving frequency and other operating information.

CASSETTE PLAYER

The Cassette Player derives a signal from cassette tapes and sends the signal to the radio which amplifies it and drives the speakers. In addition, a mute signal is sent from the Cassette Player to the Radio to switch its program source from the internal tuner to the Cassette Player. The Cassette signals are not digitally encoded.

COMPACT DISC

The Compact Disc Player operates similarly to the Cassette Player.

RADIO, CASSETTE, AND COMPACT DISC PLAYER ILLUMINATION

The Radio Control Head, Cassette Player and Compact Disc Player receive an illumination signal from the Light Switch through the Radio via the GRY (8) wires. This signal powers the bulbs in the Radio Control Head, Cassette Player, and Compact Disc Player and controls the vacuum fluorescent (VF) dimming in the Radio Control Head, Cassette Player, and Compact Disc Player. The Lights ON input signal used to dim the VF displays is provided through the Radio to the Radio Control Head through the BRN (9) wire. The Compact Disc Player receives its VF signal from the Radio Control Head via the PPL/WHT (724) wire.