GF82.61-P-4099RTE Audio 50 APS Component Description

GF82.61-P-4099RTE Audio 50 APS Component Description
- with CODE (525) MB Audio 50 APS radio

Component Identification:

Location
The radio and navigation unit is installed in the center console.

Task
The radio and navigation unit is a central control and display unit for all the entertainment and communication systems integrated into the vehicle. It can also be controlled using the control panels in the multifunction steering wheel (MFL) (left multifunction steering wheel button group (S110), right multifunction steering wheel button group (S111)).

The most important task of the radio and navigation unit is to display all the individual components integrated into the system in a uniform and user-friendly manner.

The following system components integrated into the device are controlled by the radio and navigation unit
^ Arrow navigation with CD-ROM
^ Radio tuner
^ Basic audio amplifier
^ CD audio

The radio and navigation unit consists of 2 control units. These are the control and display group and the audio gateway. Communication of these modules takes place internally via Media Oriented System Transport (MOST).

Also actuated are
^ Amplifier for sound system (N40/3)
^ CD changer (A2/6)
^ Voice control system (VCS [SBS]) control unit (N41/3) (code (813) Voice control system (VCS [SBS]))
^ Universal Portable CTEL Interface (UPCI [UHI]) control unit (N123/1)
^ An external analog audio source, which can be connected to the radio and navigation unit via the AUX jack in the glove box.

Other functions
^ Resource management
^ MOST ring master (light, power and clock master)
^ Central diagnostic interface for MOST components (via MOST and Controller Area Network bus class B (interior) (CAN-B))

Component Identification:

Operation
When switching on the radio and navigation unit via circuit 15 (ignition "ON") or by pressing the "ON" button, the menu that was displayed last before the unit was switched off is shown.

By pressing one of the buttons next to the display, the following base functions can be called up:
^ Audio
^ NAV
^ SERV
^ TEL

Component Identification:

Device description
^ DIN control panels with hard and soft keys:
- 12 key block with telephone keys on right side
- 3 soft keys each on left and right of the display
- 8 hard keys on the left side
- 5 hard key function keys under the display
- Cross-shaped control switch with confirmation function ("OK") at bottom right
- A push/rotary switch for ON/OFF and volume on the left

^ Navigation integrated into the unit (arrow navigation)
^ Global Positioning System (GPS) receiver and vibration gyro (for navigation)
^ Display (4.9" color display (TFT)) with a resolution of 380 x 96; 32,000 colors
^ CAN-B and MOST interface (radio and navigation unit serves as a gateway between MOST and (CAN-B))
^ Operable via the button groups of the multifunction steering wheel
^ Radio with dual tuner
^ Basic amplifier output stages
^ Processor
^ MMI for:
- Audio (Radio, AUX, CD, CDC)
- Navigation
- Communication (telephone, SMS)
- Office (address book)
- System settings

Technical specifications
^ Networking with CAN-B
^ Displays (radio, CD/CDC, telephone, navigation) in the multifunction display (A1p13) via CAN-B
^ Networking with CD changer, amplifier for sound system and Universal Portable CTEL Interface (UPCI [UHI]) control unit via MOST

TMC = Traffic Message Channel. This is a subchannel that broadcasts traffic information permanently and inaudibly for some stations via FM radio broadcasting. It is used for text messages and for dynamic destination-oriented navigation system.

^ Dynamic destination-oriented navigation system using radio TMC
^ Fast loading of another language for navigation voice outputs(voice output for the navigation feature is possible in multiple languages)
^ Position finding with GPS
^ Determination of the relative changes in direction using turn rate sensor (gyro)
^ Determination of the route traveled by the vehicle using wheel pulse counter (RIZ signal) via CAN-B
^ Control unit performs a self-test after activation and calibrates itself automatically if needed

Audio gateway (AGW)
The audio gateway is fully integrated in the housing of the radio and navigation unit.

AGW functions
^ Radio dual tuner (is the radio component in the system)
^ CAN-B interface
^ MOST ring master (light, power and clock master)
^ Central diagnostic interface for the MOST components (via MOST and CAN-B)
^ Amplifier output stages for standard sound (except code (810) Sound system)

Control of radio functions
^ Receiver for FM, MW, LW, SW receiver (10 station presets per band)
^ Selection of frequency band (manually/automatically)
^ Station search (manually/automatically)
^ Station preset management (saving and retrieving stations)
^ Traffic information radio channel via integral traffic information radio channel decoder (TP/TA)
^ Telephone muting (MUTE)
^ Decoding and displaying of RDS information (station name, traffic information radio channel)

Software update
The radio and navigation unit is updated with an update CD. The AGW software, however, is updated via diagnosis.

CD drive
The standard CD drive is used for playing audio CDs and reading out navigation data CDs and DVDs. Self-burned CDs and data CDs with MP3 files (max. 99 tracks) can be read. The functional capability, however, depends on the blank CDs used and the burning method; the playback of CD-RWs is limited.

Navigation processor
The navigation function is run in the radio and navigation unit. For this purpose, a GPS receiver and a turn rate sensor are integrated in the device, in addition to the DVD ROM drive.

GPS receiver
^ Receiver unit for receiving GPS satellites (degrees longitude and latitude as well as UTC time and date)
^ Position fixing, e.g. with reception of at least three satellites, the receiver can evaluate and track up to 12 satellites

Gyro sensor
The turn rate sensor is a piezo-electric vibration gyro.
It is used to detect changes in direction (e.g. when cornering).

Diagnosis
Diagnosis takes place from the central gateway control unit (N93), via the Control Area Network bus class D (diagnosis) (CAN-D) and to the radio and navigation unit.
The radio and navigation unit forms the interface (gateway) to the connected MOST subscribers. The "Keyword 2000 protocol" is used.

Other control units in MOST can only be addressed and diagnosed if they are entered into the specified configuration (MOST variant coding).