Component Description For Sound System Amplifier Control Unit - GF82.62-P-5010RD

Model 172.4 

with code 810 (Premium sound system) 

Shown on model 172.4 as of 01.03.2016 

Location 

The sound system amplifier control unit is located in the front passenger footwell.

Tasks 

The sound system amplifier control unit has the following tasks:

• Receive signals 
• Decoding, supporting and amplifying signals 
• Transmitting signals 

Receive signals 

• Direct lines 
• Media Oriented System Transport (MOST) 

Direct lines 

• Power supply over circuit 31 and circuit 30g over one direct line each
• Wake-up for MOST
• Audio muting (mute function) from the HERMES control unit (N112/9) (with code 360 (HERMES UMTS) or with code 362 (HERMES LTE)) or from the emergency call system control unit (N123/4) (with code 348 (Emergency call/Assist system) or with code 359 (TELEAID emergency call system))
• Synthesized sound signals from the engine sound control unit (N40/1) (with code B63 (iESS vehicle sound))

Media Oriented System Transport (MOST) 

The sound system amplifier control unit is a MOST subscriber and receives e.g. audio signals from the following components:

• Audio unit
• Tuner unit (A90/4) (with code 536 (SIRIUS satellite radio), with code 537 (Digital radio (DAB)) or with code 865 (TV tuner) as of 01.03.2016)
• Satellite digital audio radio (SDAR) control unit (N87/5) (with code 536 (SIRIUS satellite radio) up to 29.02.2016)
• Digital Audio Broadcasting control unit (N87/3) (with code 537 (Digital radio (DAB)) up to 29.02.2016)
• Digital TV tuner (A90/3) (with code 865 (TV tuner) up to 29.02.2016)

Decoding, supporting and amplifying signals 

Signal conditioning in the sound system amplifier control unit encompasses the following aspects:

• Decoding of copy-protected audio signals based on Digital Signal Processing (DSP) technology
• Supporting surround sound
• Supporting of stereo entertainment channels and announcement channels
• Amplifying decoded audio signals
• Processing of synthesized sound signals from the engine sound control unit (with code B63 (iESS vehicle sound))

Transmitting signals 

The sound system amplifier control unit outputs the audio and sound signals via the following speakers:

• Left rear speaker (H4/7)
• Right rear speaker (H4/8)
• Center instrument panel speaker (H4/27)
• Left door tweeter (H4/33)
• Right door tweeter (H4/34)
• Center rear speaker (H4/49)
• Left door midrange speaker (H4/86)
• Right door midrange speaker (H4/87)
• Left door woofer (H4/88)
• Right door woofer (H4/89)

Sound amplifier control unit wiring diagram

N40/3

PE82.62-P-2101-97TAA