GF82.60-P-2002PJ CD-Player Mode, Function

GF82.60-P-2002PJ CD-player Mode, Function

MODELS 203 up to 23.4.04
- with CODE (352a) COMAND operating and display system
- with CODE (498) Japanese version

The CD player with changer (in glove compartment) (A2/6) is a 6-disc CD player located in the glove compartment. It is installed within the Digital Data Bus (D2B) and is controlled using the COMAND operating, display and control unit (A40/3). Only valid audio CDs can be played. The control signals and the audio data from the CD player with changer (in the glove compartment) (A2/6) are transmitted via the D2B. The end amplification of the audio signals is assumed by an amplifier integrated into the audio gateway control unit (N93/1). The audio signal is transmitted digitally to the COMAND operating, display and control unit (A40/3) via the D2B bus. The amplified signals are emitted via the vehicle's speaker system.

After switching on the COMAND operating, display and control unit (A40/3) the CD player with changer (in glove compartment) (A2/6) immediately starts to read (scan) after a magazine has been inserted, i.e. it scans the given CDs. After scanning the magazine, CD 1 or the next available CD is loaded. The CD player with changer (in glove compartment) (A2/6) reads in the data of a permanently stored table of contents (TOC entry). As a result, the operating module clearly recognizes the particular CD, and is able to automatically name it after the one-time user allocation of the title (even if the CD is inserted in another CD magazine).
The table of contents (TOC entry) also contains information on the number of titles on a CD and the total CD playing time.

Data CDs are not detected when scanning the magazine. The magazine slot is initially deemed to be occupied (the valid format only is recognized), after first selection however, it is then listed as not occupied.

The first time the CD mode is selected and each time a new CD is selected, CD 1 is always played first. The following functions are available:
- Magazine change
- CD selection
- TRACK SKIP
- CD music search and relative time of CDs that have been played
- "Scan"
- Random
- Repeat
- Stop mode
- Pause mode

Stop mode/Pause mode
In each respective mode the motor of the CD player with changer (in glove compartment) (A2/6) is switched off, in order to keep current consumption as low as possible. If the CD mode is left, the CD player with changer (in glove compartment) (A2/6) continues the read process (scan). Once the read process has been completed, the COMAND operating, display and control unit (A40/3) is notified of the magazine slot occupation status. Only CD playback is interrupted for traffic information and information from the navigation system. A previously interrupted scan process is not continued. After the end of the traffic and navigation information announcement, playback continues at the position it was stopped at.

Diagnosis function
In order to test the D2B system during the installation, to localize any fault sources and to be able to reproduce faults that occur when in operation, the CD player with changer (in glove compartment) (A2/6) has a diagnosis mode. During diagnosis the CD player with changer (in glove compartment) (A2/6) remains operational.

Device identification
To be able to clearly identify the device, the following data have been stored:
- A = MB part number
- B = Hardware status (calendar week/year)
- C = Software status (calendar week/year)
- D = Supplier code (Alpine. 32 )
- D = Diagnosis recognition (diagnosis software status)
- E = Production date (YY.MM.DD)

Fault memory:
Any faults that occur are recorded by the CD player with changer (in glove compartment) (A2/6) and stored. The memory is not deleted when the COMAND operating, display and control unit (A40/3) is switched off and the voltage supply disconnected. The fault memory has to be separately deleted.

A differentiation is made between faults that are still present (e.g. in the hardware) and faults that are no longer present (temporary faults).

Fault information/freeze frame data
- Type of fault
- Existing faults
- Frequency of occurrence