Technical Training
Audio Systems
Information and communication systems are playing an ever increasing role in the world today. People now expect these systems to be available within the automotive environment. The MINI is available with a range of facilities to fill these demands.
Purpose of the System
Audio systems that have been designed to integrate with the vehicle aesthetics and the sound tuned to the vehicle environment. They provide not only musical entertainment but traffic announcements and news information as well.
The MINI is offered with a range of audio systems from the standard stereo to a HI-FI system with a Digital Sound Processing (DSP) amplifier and Harman Kardon speakers. MINI is standard with the CD53 Business single disc CD player. A 6 disc CD changer is optional and dealer installed.
System Components
The Standard Audio System consists of:
- CD53 Business CD Headset
- 6 Speaker System
Standard Audio System
Maximum power 4x15 watts
- 160 mm woofer, Goodmans (front doors)
- 25 mm tweeter, Goodmans (front doors)
- 160 x 220 mm woofer, Goodmans (rear side panels)
The Top Hi-Fi DSP Audio system consists of:
- CD53 Business CD Headset
- 8 Speaker Harmon Kardon System
- Harmon Kardon DSP Amplifier
Optional 6 disc CD changer available with either System
CD53 Business CD Headset
The CD53 Business CD Headset has been designed to blend in with the vehicle interior and provide easy to read information via the display along with controls that are easy to reach and use. The radios support the following features:
- Connection to an aerial diversity system
- Speed dependent volume control (GAL)
- Diagnosis capability via DISplus
- Keyless operation for 20 minutes
- Control via multi-function steering wheel (if equipped)
- Automatic muting during a telephone call (if equipped)
Radio Functions
The radios are switched on or off by pressing the volume button on the radio. On all business spec sets the radio is operational in ignition position 1 and 2 and functions for 20 minutes after the key has been turned to position 0 or removed.
Automatic Tuning
When one of the seek tuning buttons, < or > is pressed, automatic tuning commences in the direction of the arrow on the button pressed. If no station has been found after the entire frequency band has been run through twice, the tuner stops the seek function and returns to the last set frequency. The seek function can be cancelled by pressing the frequency band button, preset buttons, tone or - - button; this will then activate the function of the particular button pressed.
Manual Tuning
When the "m" button is pressed, manual control of the frequency search is obtained. Stepping up or down through the frequency range is performed by pressing the appropriate < or > which will adjust the frequency in a pre-determined step. Keeping the button depressed will allow the waveband to be scanned rapidly, releasing the button will then revert the operation back to the pre-determined step mode. After approx. 8 seconds the tuner will switch back to automatic tuning mode if neither of the seek tuning buttons is pressed. Manual tuning is available in all wavebands.
Scan
When the "m" button is pressed for approx 1.5 seconds the Scan facility is activated. The tuner will scan the respective waveband for all available stations and play each station for approx. 7 seconds. When the tuner is set to the FM waveband and the RDS function is on, only RDS stations will be tuned in. To cancel the scan operation press the "m" button and this will revert the tuner to the last tuned station.
Tone
The tone button enables the following scroll sequence to be activated: Bass-Treble-Fader-Balance-DSP functions (if equipped). Adjustment of each option is via the volume control knob. To revert the tone settings to the original mid point settings the tone button should be held for approximately 2 seconds. The setting may then be reset or the tone functions are exited via the -- button.
When the DSP amplifier is installed the final options in the tone sequence are the DSP Effects and Driver setting. Selections are made using the - - button and volume control knob. After the TONE LIN option is accessed, a further press of the Tone button will access the following scroll menu:
- Speed volume (GAL)
- TP Min - Sets Traffic announcement sound level
- PTY - Program Type Data. Can be set to Auto or Off
- RESET - Resets this menu to the original settings
Adjustment of each option is via the volume control knob or - - button.
RDS
RDS is a transmit and receive system that operates in the FM waveband. The data service provides information that is broadcast inaudibly alongside the audio signal. The station name will be displayed when the RDS system is active and tuned to a broadcasting station.
If the reception quality of the tuned station deteriorates and no alternative frequency is available the tuner will start to search. If the tuner cannot find a transmitter for the same program that offers adequate reception quality, the tuner will revert to the last frequency received.
The RDS on/off mode can be user selected. To select the RDS function the left button marked - - should be depressed. The main display will show 'RDS ON' for 3 seconds. To cancel the RDS function the same button should be depressed again. The main display will show 'RDS OFF' for 3 seconds.
Mode
The Mode button allows the user to switch between the different listening modes, ie: Tuner, Tape, CD, or CDC. Each change is accompanied by a short mute pause during which the mode selection will change on the display. When switching between modes the settings previously set are retained for each individual mode.
Speaker Systems Standard Stereo Speaker System
Standard Stereo Speaker System
The standard Stereo Speaker System consists of 6 loudspeakers.
The Tweeters are connected in parallel with the front woofers. The wires of the loudspeaker wiring harness are twisted and the harness is integrated into the main wiring harness.
Harmon Kardon 8 Speaker System
The optional Harmon Kardon 8 Speaker System consists of the following:
- CD53 Business CD (or Cassette) Headset (Same as in Standard System)
- DSP Active Amplifier
- 8 Harmon Kardon speakers (10 discrete channels)
DSP (Digital Sound Processing Amplifier)
The DSP function allows five unique processed sound types to be selected along with the standard setting. The five types are:
- Electronic
- Spatial
- Festival
- Instrumental
- MINI Harmon Kardon
The DSP function also allows for an on/off switching of the speaker time alignment facility (Driver function). This function enhances the stereo of the sound by allowing for the fact that as the driver does not sit centrally in the car one speaker is closer to the listener than the other, hence the sound reaches the listener at different times; time alignment enables the sound to reach the listener at the same time thereby improving the stereo image. The Driver function is not available for the Spatial or Festival settings.
All DSP user functions are controlled from the radio headset using the Tone key and volume control knob. The DSP amplifier is located in the right of the luggage compartment behind the rear light.
MFL
All radio headsets are compatible with the Multi-Function Steering Wheel. There are two sets of switches fitted on the back of the steering wheel, one on the left side and one on the right side. The right switch controls the volume up/down and the MODE function while the left switch enables the up/down selection of the preset stations on the chosen waveband. If the manual button is activated the left switch will manually up/down search the chosen frequency band and by pressing the switch > 4 seconds the frequency band will be fast searched.
CD Changer (CDC)
The CD changer (CDC) is fitted into the right side of the luggage compartment. The CDC works in conjunction with all the MINI radio headsets. The CD magazine holds 6 discs and locates in an opening in the front of the unit. A sliding cover is closes off the magazine aperture and prevents dirt and dust ingress into the mechanism. A button located by the magazine is used to eject the magazine from the unit. Data is transferred and the CDC is controlled via the K-bus.
K-bus Interface
The headset is connected to the systems by means of the K-bus. The following functions are controlled through communication via the K-bus:
- Anti-theft system
- Control via multi function steering wheel
- Changing of CD's by the CDC
- Diagnosis by means of DISplus
- DSP operation, illumination
Security
The radio headsets are no longer protected by a manually entered security code system. If a valid K-bus message isn't received, the radio will remain inoperative ('Disabled' status). Normal radio operation will commence once the radio has received a valid K-bus message. Each time the radio power supply is disconnected and reconnected a K-bus message is sent to the radio and if OK, the radio operation recommences. This security function also applies to the CD Auto changer when equipped.
Diagnosis
All units have diagnostic capability using DISplus.
Service Mode
All MINI radios have an on board service mode. This enhanced mode can be used to interrogate the unit settings and also diagnose the reception quality and audio acoustics.
Activating the service mode
The service mode can be activated within the first 8 seconds after switching on the radio unit. This is achieved by pressing and holding the "m" button (after 1.5 seconds, the SCAN mode is activated, the m button should not be released until the service test mode is entered. SN ****** will be shown). The radio will then automatically switch to service test mode. Switching off the radio deactivates the service mode.
Service mode functions
When the service mode is activated the radio unit automatically switches to radio mode (FM1/RDS on). Only manual tuning is available in the service mode. The range of functions in Service mode is selected by using the - - button:
- SN Serial Number
- SV - MM Software Version
- RS - 00 Revision Level
- GAL Selection of GAL Curve
- Tuner 1 Setting and Data for the Listening Receiver
- DSPO VOO DSP Setting
- TP-V TP Volume Setting (Traffic Report)
- Blank Display Pixel Display Check
- Region Set Country Program
- AF Auto AF Setting
Description of service mode functions
SN The serial number of the unit is displayed, this cannot be altered.
SV MM This displays the software version installed in the unit. In addition to the calendar week and year, the information also contains a version number.
RS 0.0 This displays the radio unit revision level.
GAL Displays the current GAL curve setting. Pressing the preset buttons 1 to 6 can set a new GAL curve.
Tuner 1 Displays the frequency set (FM waveband), the signal strength and the quality of the signal received. In AM mode, the frequency set and signal strength are indicated.
DSPO VOO Indicates if DSP is fitted and in communication with the headset. DSP 0 will be shown if DSP is not fitted and DSP 1 will be shown if DSP is fitted. V is for the volume level, 00 is minimum. The volume control knob changes volume.
TP-V The minimum TP volume can be adjusted within a range from -9 to +9. Preset station button 1 (- direction) will reduce the level by one step. Preset station button 2 (+ direction) will increase the level by one step. The volume can be made louder or quieter by repeatedly pressing the buttons until the desired level is found.
Blank Display The blank display is the test mode for the display pixels. Pressing the preset button 1 to 4 will change the type of display: All pixels ON, all pixels OFF, chessboard 1 and chessboard 2.
Area Setting This function is only on business radio headsets. This function enables the unit to be market programmed to the correct region. Options are: Europe, USA, Japan, Oceanic and Canada.
AF Auto The Alternative Frequencies (AF) can be switched between auto setting and off.