Audio System; Outer Measures - Lifan 620 Maintenance Manual

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Section VII Audio System
I. Overview
This system combines digital video and various devices to decorate your car to be a tiny music
theater and satisfy you with CD music, USB interface, AM/FM radio. It is composed of: (1) antenna
amplifier, (2) AM/FM printed antenna, (3) CD assembly, (4) speaker and (5) USB interface.
Fig. 4-104
Operating principle: This system is to provide entertainment programs and information by
receiving, modulating and amplifying the AM/FM radio signal at commercial frequency from the
local radio station. Through the printed antenna, the electromagnetic signals from the radio station
will then form weak current modulation signal and then transfer to the radio by the antenna
amplifier and cable. Then the radio will modulate and amplify the weak signals received to
stronger current signal, and then transfer it to the speaker which will then transform the strong
signal to air vibration to revert the signal to sound. The user can select the audio system of other
models to supply equipments with sound and video like cassette, CD or VCD. No matter what type
you choose, the components of the audio system will amplify and adjust the audio signal within the
car to cater for all people in the car.
The audio system resists the radio frequency interference and electromagnetic wave interference
by the inner circuit.

Outer measures:

(1) Grounded antenna amplifier housing
(2) Grounded radio housing
(3) Grounded engine and vehicle body
(4) Resistor type spark plug
(5) Radio anti-noise secondary ignition coil
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