09_E65 Audio System.pdf

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Table of Contents
E65 AUDIO SYSTEM
Subject
Page
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Components
Antenna Tuner with Diversity (AVT). . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Antenna System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Rear Window. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Antenna Diversity Unit (FM). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Antenna Amplifier (FM). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Antenna Amplifier (AM). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Audio System Controller (ASK). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Basic Hi-Fi Amplifier. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
LOGIC 7 Hi-Fi Amplifier. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Speakers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Audio CD Changer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Review Questions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Initial Print Date: 10/01
Revision Date: 11/01
E65 AUDIO SYSTEM
Model: E65 - 745i
Production Date: 11/2001 - Start of Production
Objectives:
After completing this module you should be able to:
•
•
•
Explain how audio signals are transported in the E65.
Describe the functions of the ASK.
Recognize the component layout of the audio system of the E65.
2
E65 Audio System
Introduction
On previous vehicle models, the radio was always controlled by an integrated control unit.
This control unit included the tuner, cassette deck, amplifier, display and the operating unit.
The radio could be equipped as an Hi-Fi audio system by adding further components (CD
changer) or boosters (Digital Signal Processor etc.). Because of the increasing number of
functions in a radio and the limited area available in the standard radio chassis, new solu-
tions had to be found for the radio control unit.
In the E65, the radio control unit is no longer in a single module. The audio system has dis-
tributed functions which are integrated in various control units, e.g. the display and operat-
ing function.
The radio is operated via the Controller in the center console, the display is produced in the
Control Display located in the instrument panel and the audio signals are controlled in the
ASK.
There are two audio systems available for the E65 from the start of production: A basic Hi-
Fi and the optional LOGIC 7 Hi-fi.
System Diagram
Block diagram of the basic E65 audio system.
kt-9308
3
E65 Audio System
Block diagram of the Logic7 E65 audio system
kt-9309
Components
Antenna/Radio Tuner with Diversity (AVT)
The E65 tuner is different from previous radios. The tuner is actually a control unit with a
MOST port and is placed in a different location than the radio.
The tuner (2) is now located close to the antennas. The installation location of the anten-
na tuner is in the rear left C pillar. Due to the direct connection of the antenna diversity (1),
no antenna amplifier is needed on the left-hand side.
On the right-hand side, there is an antenna
amplifier which is linked via a coaxial cable to the
diversity unit. The tuner provides the power sup-
ply to the antenna diversity and the antenna
amplifier.
The digital audio signals are transmitted to the
ASK via the MOST, therefore there is no antenna
coaxial cable. This avoids signal losses and
interference.
kt-9217
4
E65 Audio System
The tuner used on U.S. E65s is a world tuner which can receive long wave (LW), medium
wave (AM), short wave (SW) and frequency modulation (FM), as well as traffic and weather
forecast information (US). In the U.S. weather forecast information is transmitted on 7 dif-
ferent frequencies 24 hours a day.
The single tuner is set for all country variants, with the exception of the ECE. It corresponds
to the former Business Radio.
Antenna System
The antenna for radio and remote control services (FBD) on the E65 are located in the rear
window. They include an AM antenna for LW, MW, and SW and 4 FM aerials for VHF
reception. The FBD frequency for U.S. vehicles is 868.4MHz
kt-8677
Index
1
2
3
4
5
6
LMK
FM1
FM2
Description
Antenna tuner
Antenna diversity
Antenna amplifier
Coaxial cable
Suppressors are integrated into the
Wiring harness.
Filter trap
AM antenna for long, middle and short
waves
First FM antenna
Second FM antenna
Index
FM3
FM4
FM5
FBD
PM
KL30
KL31
U ANT
Description
Third FM antenna
Fourth FM antenna
FM antenna for traffic announcements
(Japan)
Antenna for remote control services
Power Module
Power supply
Ground
Power supply for antenna modules
5
E65 Audio System

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