Mercedes-Benz ML320. Service manual - part 244

 

  Index      Mercedes     Mercedes-Benz ML320 - service and repair manual 1997-2005 year

 

Search            copyright infringement  

 

 

 

 

 

 

 



 

 

Content   ..  242  243  244  245   ..

 

 

Mercedes-Benz ML320. Service manual - part 244

 

 

Fig. 65: Identifying Speaker System (LSA) Components Arrangement 

SPEAKER SYSTEM (LSA), LOCATION OF COMPONENTS - GF82.62-P-0002-01E 

Model 163 with sound system  

 

2001 Mercedes-Benz ML320 

1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis

  

me 

 

Fig. 66: Identifying Speaker System (LSA) Components Location

TABLE OF CONTENTS, FUNCTION DESCRIPTION OF ANTENNA SYSTEM (ATS) - GF82.62-P-0999GHZ 

MODEL 163  

SOUND AMPLIFIER, POSITION - GF82.62-P-3100-01GH 

Fig. 67: Identifying Sound Amplifier Location 

SOUND AMPLIFIER, FUNCTION - GF82.62-P-3100-04GH 

The data interchange between the sound amplifier (A2/13) and the possible signal sources, e.g.: 

Radio (A2) or  

COMAND operating, display and control module (A40/3)  

is performed via the digital databus (D2B ). Here, both the control information and the signals from the audio 
sources (radio, CD, navigation voice command) are sent via the digital databus (D2B ). 

Signal processing  

In order to make the diverse sound settings possible, the sound amplifier (A2/13) is equipped with a D igital S 
ignal P rocessor (DSP ), which performs the entire signal filtering process. In comparison to conventional 

 

Antenna system (ATS), function

 

GF82.62-P-
0001GH

 

Survey of system components for antenna 
system (ATS), 
location/purpose/design/function

 

GF82.62-P-
9999GHZ

 

2001 Mercedes-Benz ML320 

1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis

  

me 

 

analog filters, digital filters contain the following significant advantages:

the filter parameters (sound settings) do not alter throughout the period, this thus means that all the 
settings can be repeated exactly  

low noise level  

the component outlay is significantly reduced, as the filter parameters are set by the software and not by 
varying component values (resistances, capacitances or inductance values), thus the number of possible 
filter settings is increased  

Sound optimizations  

Each of the six amplifier channels is equipped with an individual compensation, which can, when requested, 
rectify the vehicle's acoustics. In addition further sound optimization settings can be made and effects such as, 
e.g. 'voice emphasizing' or 'stereoscopic sound' invoked. 

Bass, treble, volume, balance, fader and the dynamic loudness function can be individually set. 

Noise suppression  

The output level of the six 6 output stages is constantly monitored and regulated such that distortion is kept to a 
minimum. 

Automatic Vehicle Noise Compensation (VNC))  

With the aid of the sound amplifier microphone (B25/6) , which is connected directly to the sound amplifier 
(A2/13)
 , the noise level in the vehicle is measured. The volume of the music output signal is constantly adapted 
to this noise level. To this end the sound amplifier (A2/13) must be able to detect which of the measured 
signals are noise emissions from the moving vehicle and which are audio signals. This is conducted by 
comparing the output signal of the sound amplifier (A2/13) with the measured signal. 

Put simply, the vehicle noise level is the difference between the two signals. 

Diagnosis  

The sound amplifier (A2/13) can set up the following messages which are relevant for the diagnosis: 

Operating status  

Undervoltage  

Internal fault in the sound amplifier (A2/13)  

The messages are sent over the digital databus ( D2B ) to the COMAND operating, display and control 
module (A40/3)
 or the radio (A2) , and can be read out there over the ( K-wire ) diagnostics line. 

SOUND AMPLIFIER, LOCATION/TASK/DESIGN/FUNCTION - GF82.62-P-3100GH 

MODEL 163 with CODE (810) sound system

 

2001 Mercedes-Benz ML320 

1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis

  

me 

 

REAR WINDOW ANTENNAS, DESIGN - GF82.62-P-3106-03GH 

Model 163  

Antenna ranges  

 

Sound amplifier, 
position

 

GF82.62-P-3100-
01GH

 

Sound amplifier, task

Processing (sound settings) 
and amplification of all audio 
signals (radio, cassette, CD, 
navigation voice command,..)

 

 

Sound amplifier, design

Digital databus interface 
(D2B)  

Connection for sound 
amplifier microphone 
(B25/6)
 for automatic 
vehicle noise 
compensation  

Digital filter technology  

outputs distributed 
across following 
loudspeaker groups:  

Treble  

Medium treble  

Medium bass  

Bass  

 
These are distributed as 
follows: 
Left front 
Right front 
Left rear 
Rear right 
Center 
Woofer

 

 

Sound amplifier, 
function

 

GF82.62-P-3100-
04GH

 

2001 Mercedes-Benz ML320 

1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis

  

me 

 

 

 

 

 

 

 

 

Content   ..  242  243  244  245   ..