Radio, Stereo, and Compact Disc: Description and Operation
CIRCUIT OPERATIONWith the Ignition Switch in ACCY or RUN, voltage is applied through the RADIO Fuse to the ON-OFF Switch of the Radio.
When the Radio Receiver is turned on, voltage is applied to the solid-state circuitry and display.
Voltage is available at all times through the ARC Fuse to power the digital clock and memory related functions of the Radio Receiver to continue operation with the system off:
Delco-Bose Music System
The Delco-Bose Music System consists of Electronic Radio and four Amplifier/Speaker units. Each Amplifier/Speaker Unit has a speaker assembly, and an amplifier to power the speaker. The speakers have been carefully designed and positioned to utilize sound reflections from windows and other parts of the car interior. The result is balanced sound for every listening position in the car. This ends the need for a left and right balance control.
Power for the Radio Receiver is available through the RADIO Fuse with the Ignition Switch in ACCY or RUN. When the system is turned on, voltage is applied through the Radio Receiver to the Delco-Bose Amplifier Relay. The Relay contact closes to power the Amplifier Speaker Units.
The Radio Receiver receives voltage through four paths:
1) RADIO Fuse to the On-Off Switch from the YEL wire, 2) ARC Fuse which keeps the solid state clock, date, and station memory circuits alive when the Ignition Switch is turned OFF (ORN wire), 3) An Instrument Panel lamp voltage controlled by Panel Interior Light Control to the Radio Panel Light (GRY wire), 4) A Digital Dimming voltage from the Light Switch (BRN wire).
The Radio Receiver also applies battery voltage to the PNK wire to energize the Delco-Bose Amplifier Relay (if equipped).