Principles of Operation

PRINCIPLES OF OPERATION

Audio Unit
The audio unit can be powered up when the ignition switch is in the ON or ACC position. The audio unit provides audio signals to the speakers, subwoofer amplifier, and center imaging amplifier, thus producing sound.

Radio Frequency suppression
The radio frequency suppression equipment reduces interference transmitted through the speakers by the engine ignition and electrical systems. When installing any new radio suppression equipment components, make sure that a good contact is made at all connections.

Antenna
The antenna receives AM and FM radio waves. The antenna is a conductive trace concealed on the inside of the windshield. The AM and FM waves are sent to the audio unit through the antenna cables.

Subwoofer
The subwoofer speakers are powered from a separate subwoofer amplifier. The clip detection circuit carries out 2 functions: to turn on the subwoofer amplifier, and to indicate to the audio unit when the subwoofer output distortion signal reaches a damaging level. The audio unit then reduces the audio output signal to the subwoofer amplifier.

Steering Wheel Control Switches
The steering wheel audio control consists of a specific resistor value for each button function creating a voltage divider. When a button is pressed, a specific reference voltage is sent to the audio unit. The audio unit then uses this reference voltage to determine which control input function has been selected.