Table of Contents E70 Audio Systems Subject Page Introduction .3 Audio Systems in the New BMWX5.3 System Overview .4 E70 Audio Systems.4 System Components.18 Professional Radio (CHAMP) .19 Amplifiers and Speakers .22 HiFi System .23 Top-HiFi System .24 Top-HiFi Amplifier.25 IKT Antennas .26 Blocking Circuit and HBL Filter.28 Roof Antenna.30 Radio Antennas.31 FM Antenna Diversity .32 Digital Tuners .33 CD Changer.35 Retrofitting a CD Changer .38 Audio Jack .38 Service Information.39 Diagnosis.39 Reset.40 Service Concept.40 HiFi Amplifier.40 Top-HiFi Amplifier .41 Antenna Diagnosis.41 Service Mode .41 Hissing or Interference on Radio.42 CD Changer.43 Initial Print Date: 10/06 Revision Date: Audio Systems Model: E70 Production: From Start of Production ■MICTIWIS After completion of this module you will be able to: • Identify the Audio Systems Used on the E70. • Describe the different functions of the two Audio Systems of the E70 • Identify the components integrated to the Audio Systems on the E70. 2 E70 Audio Systems Introduction Audio Systems in the New BMWX5 The following audio equipment is available in the new BMWX5 (E70): • Professional radio • Professional navigation system. The Professional radio is standard equipment. The standard equipment comprises the Drive with controller and Central Information Display (CID). US vehicles are equipped with CHAMP (Central Head unit and Multimedia Platform), the new platform for the mid¬ range radio segment in BMW vehicles. An enhancement of the CCC (Car Communication Computer) is available as the Head unit for the Professional navigation system. The Professional radio and Professional navigation system offer eight favorites buttons. There are six favorites buttons that can be assigned favorites while the other two are assigned fixed functions. CHAMP Favorites Buttons The radio and navigation system can be combined with the following speaker and ampli¬ fier systems: • HiFi system • Top-HiFi system. The Professional radio with HiFi system is standard equipment on US vehicles. The Top-HiFi system is available as option "Professional HiFi system". Digital radio is available in addition to AM and FM stations, the SDARS satellite tuner will be available from market launch. High definition radio will be available at a later date. Note: A single-slot CD changer is available in a BMW for the first time. This changer holds six discs, which are inserted into the unit without the use of a magazine. 3 E70 Audio Systems System Overview E70 Audio Systems The HiFi system has five tweeters, five mid-range speakers and two central bass speak¬ ers. The HiFi amplifier has a K-CAN connection for diagnostics and coding. The Top-HiFi system has seven tweeters, seven mid-range speakers and two central bass speakers. The Top-HiFi amplifier is connected to the MOST. The following pages show the input/output diagrams and system circuit diagrams for the audio systems of the E70: • Amplifier and speaker systems • Digital tuners. The input/output diagram shows the subscribing control units, sensors, controls and components. For emphasis, only the control unit concerned is shown in its block repre¬ sentation. The input/ output diagram gives an overview of the system concerned, repre¬ sented as a signal path. It does not show whether the signals are sent via bus connec¬ tions, additional control units, by fixed wire or by wireless. This detailed information is contained in the system circuit diagram The input/output diagram also applies to the HiFi system, if the HiFi amplifier were shown in place of the Top-HiFi amplifier. The wheel speed signals are sent from the DSC control unit on the PT-CAN and con¬ verted to the K-CAN protocol in the Junction-box ECU (JB). The instrument cluster processes the speed signal and outputs this on the K-CAN. The differences between the HiFi system and the Top-HiFi system are illustrated in the following system circuit diagrams. 4 E70 Audio Systems CCC/CHAMP HiFi System and Top-HiFi System Input/output Diagram Index Explanation Index Explanation 1 Head unit (CCC or CHAMP) 6 Antenna amplifier with diversity module 2 Multifunction steering wheel (MFL) 7 Rear spoiler (FM1, AM) and rear window anten¬ nas (FM2, FM3) 3 Central information display (CID) 8 Audio speaker 4 Wheel speed sensor 9 Top-HiFi amplifier 5 Audio jack 10 Controller 5 E70 Audio Systems HiFi System Circuit Diagram ®DIV 6 E70 Audio Systems Legend for HiFi System Circuit Diagram Index Explanation Index Explanation 1 Head unit 12 Rear spoiler antenna (AM) 2 Central information display 13 Rear spoiler antenna (FM1) 3 Mid-range speaker, front center 14 Rear window antennas (FM2, FM3) 4 Tweeter, front center 15 Antenna amplifier with diversity module 5 CD changer 20 HiFi amplifier 6 Tweeter, front right door 21 Mid-range speaker,rear left door 7 Mid-range speaker, front right door 22 Tweeter, rear left door 8 Controller 23 Central bass speaker, left 9 Central bass speaker, right 24 Audio jack 10 Tweeter,rear right door 25 Mid-range speaker, front left door 11 Mid-range speaker, rear right door 26 Tweeter, front left door LVDS Low voltage differential signal MOST Media Oriented System Transport (digital bus) Aux_NF Audio input for additional audio sources FS MOST direct access Rad_On Control signal or power supply US Switching voltage HF High frequency signal ZF Intermediate frequency signal 7 E70 Audio Systems K-CAN signals at the CCC/CHAMP control unit In/out Signal Source/sink Function In Speed signal > Wheel speed sensor r > DSC -JB - Kombi Speed-dependent volume control In Button stroke > Steering wheel buttons > SZL Volume, station selection In Terminal status > START/STOP button > CAS Switch-on conditions In (CCC only) Terminal 58g > Photo diode > FRM Lighting MOST signals at the CCC/CHAMP control unit In/out Signal Source/sink Function In Decoded audio signals > CD > CD changer Audio playback In Control signals >CD changer ID3 tags, CD content In/out Control signals >CD changer CD selection, track selection,terminal control The HiFi amplifier is connected to the K-CAN for coding and diagnostics. There is no facility provided for programming the HiFi amplifier. The HiFi amplifier is woken by the Rad_On signal sent by fixed wire from the Head unit. The tweeters and mid-range speakers are connected in parallel. The capacitors at the tweeters act as duplexers and, in the case of the HiFi system, are electrolytic. The CHAMP receives the terminal 58g (lighting) signal by fixed wire. The CCC receives it via the K-CAN. 8 E70 Audio Systems Top-HiFi System Circuit Diagram r' J 13.. 12 V V TOP-HIFI 20 , MOST Kl. 30g HF+ZF+U; Rad_on 10 E70 Audio Systems Legend forTop HiFi System Circuit Diagram Index Explanation Index Explanation 1 Head unit 14 Rear window antennas (FM2, FM3) 2 Central information display 15 Antenna amplifier with diversity module 3 Mid-range speaker, front center 16 Mid-range speaker, D-pillar right 4 Tweeter, front center 17 Tweeter, D-pillar right 5 CD changer 18 Tweeter, D-pillar left 6 Tweeter, front right door 19 Mid-range speaker, D-pillar left 7 Mid-range speaker, front right door 20 Top-HiFi amplifier 8 Controller 21 Mid-range speaker, rear left door 9 Central bass speaker, right 22 Tweeter, rear left door 10 Tweeter, rear right door 23 Central bass speaker, left 11 Mid-range speaker, rear right door 24 Audio jack 12 Rear spoiler antenna (AM) 25 Mid-range speaker, front left door 13 Rear spoiler antenna (FM1) 26 Tweeter, front left door LVDS Low voltage differential signal MOST Media Oriented System Transport (digital bus) Aux_NF Audio input for additional audio sources FS MOST direct access Rad_On Control signal or power supply US Switching voltage HF High frequency signal ZF Intermediate frequency signal 11 E70 Audio Systems K-CAN signals at the CCC/CHAMP control unit In/out Signal Source/sink Function In Speed signal > Wheel speed sensor r > DSC -JB - Kombi Speed-dependent volume control In Button stroke > Steering wheel buttons > SZL Volume, station selection In Terminal status > START/STOP button > CAS Switch-on conditions In (CCC only) Terminal 58g > Photo diode > FRM Lighting MOST signals at the CCC/CHAMP control unit In/out Signal Source/sink Function In Decoded audio signals > CD > CD changer Audio playback In Control signals >CD changer ID3 tags, CD content In/out Control signals >CD changer CD selection, track selection, terminal control Out Audio signals > Top-HiFi > audio speakers Audio signals Out Control signals >Top-HiFi Speed-dependent volume control and equalizer, terminal control Out Rad_On >Top-HiFi ON/OFF The Top-HiFi amplifier is connected to the MOST for programming, coding and diagnos¬ tics. The tweeters and mid-range speakers are connected in parallel. The capacitors at the tweeters act as duplexers and, in the case of the Top-HiFi system, are high-quality foil capacitors. The CHAMP receives the terminal 58g (lighting) signal by fixed wire. The CCC receives it via the K-CAN. 12 E70 Audio Systems Satellite Tuner (SDARS) Input/output Diagram Index Explanation Index Explanation 1 Head unit (CCC) 5 Satellite tuner (SDARS) 2 Multifunction steering wheel (MFL) 6 Roof antenna (SDARS) 3 Central information display (CID) 7 Audio speaker 4 Wheel speed sensor 8 Controller 13 E70 Audio Systems The input/output diagram also applies to the CHAMR The roof antenna receives SDARS signals transmitted by satellite. The signals are amplified by an amplifier integrated in the roof antenna and forwarded to the SDARS control module. The antenna amplifier is sup¬ plied with power from the SDARS control module. The SDARS control module decodes the digital audio signals and sends these to the Head unit on the MOST. The Head unit converts the audio data into analogue LF signals. The LF signals are output through the speakers. Note: That SDARS is operated using the iDrive and information such as track title, artist or album title are output in the CID. 14 E70 Audio Systems Satellite Tuner (SDARS) System Circuit Diagram 16 E70 Audio Systems Legend for Satellite Tuner (SDARS) System Circuit Diagram Index Explanation Index Explanation 1 Head unit 10 Mid-range speaker, rear right door 2 Central information display 11 Roof antenna (SDARS) 3 Mid-range speaker, front center 12 SDARS control module 4 Tweeter, front center 13 HiFi amplifier 5 Tweeter, front right door 14 Central bass speaker, left 6 Mid-range speaker, front right door 15 Mid-range speaker, rear left door 7 Controller 16 Tweeter, rear left door 8 Central bass speaker, right 17 Mid-range speaker, front left door 9 Tweeter, rear right door 18 Tweeter, front left door, MOST Media Oriented System Transport (digital bus) FS MOST direct access LVDS Low voltage differential signal UB Power supply Rad_On Control signal or power supply MOST signals at the SDARS control module In/Out Signal Source Function Out Decoded audio signals > Head unit Audio playback In/out Control signals > Head unit Station selection, station identifier, terminal control SDARS is also available in conjunction with the Top-HiFi system. CHAMP receives the terminal 58g (lighting) signal by fixed wire. The CCC receives it via the K-CAN. 17 E70 Audio Systems System Components This section describes the audio systems in the E70. It is divided into the following chapters: • Head units • Amplifiers and speakers • Antennas • Digital tuners • Peripherals The following Audio Systems are available for the E70: • Professional radio • Professional navigation system. The US vehicles are eguipped with the new head unit platform called CHAMP (Central Head unit and Multimedia Platform) The CCC (Car Communication Computer) is avail¬ able as the head unit for the Professional navigation system. The head units offer eight favorites buttons. The radio and navigation system with integrated audio function can be combined with the following speaker and amplifier systems: • HiFi system • Top-HiFi system. Professional radio with HiFi system is standard eguipment in the US vehicles.The Top- HiFi system is available as option."SIRIUS Satellite Radio" (SDARS) is also available as option. The "high-definition radio" (IBOC) will be available at a later date. A single-slot 6 CD changer is available in a BMW for the first time. This changer holds six discs, which are inserted into the unit without the use of a magazine. The CHAMP and CD changer support playback of MP3 and WMA files. The CCC sup¬ ports playback of MP3 files. 18 E70 Audio Systems Professional Radio (CHAMP) The CHAMP has six assignable favorites buttons. Button 7 is assigned with FM/AM selection, button 8 is for toggling the operating mode. CHAMP combines the following control modules in the one housing: • RDS double tuner • Audio system controller • Gateway between MOST and K-CAN • Interface to the Central Information Display. CHAMPsystem can be used to control: • Communication • Entertainment • Navigation • Air conditioning (climate control) • Settings (5th menu). 2 3 , 4 5 Index Explanation Index Explanation 1 favorites buttons 4 CD drive slot 2 Rotary knob 5 Rocker switch for station selection/CD track skip 3 CD drive eject button 19 E70 Audio Systems Professional Radio with NAV (CCC) Index Explanation Index Explanation 1 DVD drive slot 5 CD drive eject button 2 favorites buttons 6 Rocker switch for station selection/CD track skip 3 Rotary knob 7 DVD drive eject button 4 CD drive slot Note: Button 7 is assigned with FM/AM selection, button 8 is for toggling the operating mode The CCC combines the following control modules in one housing: • Navigation computer/GPS module; map view and/or cursor view in the CID • RDS double tuner • Audio system controller (ASK) • Gateway between MOST and K-CAN • Interface to control display (LVDS). Two drives are integrated in the housing: • DVD player • CD player 20 E70 Audio Systems When the navigation system is not in use, its DVD drive can be used to play audio CDs. The playback of video files is not supported. The CCC together with the controller and CID form the Drive system. The system can be used to control: • Communication • Entertainment • Navigation • Air conditioning (climate control) • Settings (5th menu). The MP3 directory structure corresponds to that of the PC. There is no limit to the num¬ ber of directories, subdirectories and music tracks that the CCC can support. However, the time taken for the drive to read the contents of the CD when the CD is inserted is longer, depending on how much data is stored on the CD. 21 E70 Audio Systems Amplifiers and Speakers The speaker systems in the E70 are, as in other Series, available in two quality levels: • HiFi system • Top-HiFi system. The HiFi system achieves double the power of the standard stereo system. In addition, the HiFi system is equipped with a 7-channel amplifier with digital equalizer. The optional Top-HiFi system achieves double the power of the standard HiFi system and uses a digital 9-channel amplifier. Optimum audio playback in the vehicle is achieved thanks to complex digital signal processing. The HiFi system has twelve speakers while the Top- HiFi system has 16 speakers each with different auxiliary amplifiers. The central bass speakers are located under the front seats. They are coupled to the side sills to increase the resonance volume necessary for bass reproduction. The Professional radio and the Professional navigation system can be combined with any of the amplifier/speaker systems, provided the specific national variants are taken into consideration. Note: The HiFi and Top-HiFi systems feature separate speakers for the treble and midrange frequencies. Even though the diameters of the speakers in the HiFi and Top-HiFi systems are the same, there are differences in the power output of the speakers. This is achieved through the use of different materials in the diaphragms, coils and magnets. The terms Medium and High are used in the table below for distinction purposes. Stereo system HiFi system Top-HiFi system Output CHAMP//CCC: 2°40 W (2 Q) bass/ broadband 4°25 W (4 fi) Auxiliary amplifier: 2°40 W (2 fi) bass 5°25 W (4 fi) Auxiliary amplifier: 2°125 W (8 Q) bass 7°50 W (4 Q) Sound intensity >98 dB as from 63 Hz >104 dB as from 50 Hz >110 dB as from 40 Hz Bandwidth 40 Hz up to 15 kHz 30 Hz up to 20 kHz 20 Hz up to 20 kHz Linearity ±4.5 dB ±3 dB ±1.5 dB Tweeter Manufacturer 26 mm (Medium) Phillips 26 mm (High) Phillips Broadband speaker Manufacturer 100 mm Phillips Mid-range speaker Manufacturer 100 mm (Medium) Phillips 100 mm (High) Phillips Woofer Manufacturer Phillips 160 mm Phillips 217 mm Phillips 217 mm 22 E70 Audio Systems HiFi System Index Explanation Index Explanation 1 Tweeter, front right door 8 Tweeter ,rear left door 2 Mid-range speaker, front right door 9 Central bass speaker, left 3 Central bass speaker, right 10 Mid-range speaker, front left door 4 Tweeter, rear right door 11 Tweeter, front left door 5 Mid-range speaker ,rear right door 12 Mid-range speaker, front center 6 HiFi amplifier 13 Tweeter, front center 7 Mid-range speaker, rear left door 23 E70 Audio Systems Top-HiFi System Index Explanation Index Explanation 1 Tweeter,front right door 10 Tweeter,D-pillar left 2 Mid-range speaker, front right door, 11 Mid-range speaker,rear left door 3 Central bass speaker, right 12 Tweeter, rear left door 4 Tweeter, rear right door 13 Central bass speaker, left 5 Mid-range speaker, rear right door 14 Mid-range speaker, front left door 6 Tweeter,D-pillar right 15 Tweeter, front left door 7 Mid-range speaker, D-pillar right 16 Mid-range speaker, front center 8 Mid-range speaker,D-pillar left 17 Tweeter, front center 9 Top-HiFi amplifier 24 E70 Audio Systems Top-HiFi Amplifier Index Explanation Index Explanation 1 Safety fuse 3 MOST 2 Power supply 4 Audio signals The essential features of the Top-HiFi amplifier are: • MOST control module • 7-channel equalizer with control by Drive • Higher output power in the low frequency range • 15V output voltage for each mid-range speaker/tweeter • 30 V output voltage for each central bass speaker. The audio signals and the control signals are sent in digital form to the Top-HiFi amplifier through the fiber-optic cable (MOST). Programming, coding and diagnostics are carried out via the MOST. 25 E70 Audio Systems To generate surround sound information from a stereo signal, the Top-HiFi amplifier in the E70 supports Dolby Surround Pro Logic II. This method replaces the Logic7 application from other BMW vehicles. This makes it possible to generate a spatial sound pattern from the stereo signal that is only delivered by the left and right channel. The signals of the individual channels are output with time correction from the 16 avail¬ able speakers of the Top-HiFi system in the E70. This achieves an homogenous sound pattern for the listener in the 7.2 format. Audio playback can also be adjusted by the customer using the 7-channel egualizer inte¬ grated in the Top-HiFi amplifier. After signals have been processed, the audio signals are forwarded as analogue low freguency (LF) signals to the speakers. The Top-HiFi amplifier supports speed dependent egualization in addition to speed dependent volume control. The effect is that the freguency response is adjusted in rela¬ tion to the speed of the vehicle. A total of 16 speakers are controlled through nine audio channels with Top-HiFi guality: • one tweeter and mid-range speaker in each of the front doors • one tweeter and mid-range speaker in the instrument panel • one tweeter and mid-range speaker in each of the rear doors • one tweeter and mid-range speaker in each of the D-pillars • one central bass speaker under each of the front seats. Note: The Top-HiFi amplifier is located in the rear left of the luggage compartment behind the side panel trim. IKT Antennas The E70 has up to five antennas systems, depending on eguipment options: • FM/AM radio (spoiler and rear window Antennas) • Digital tuners (roof antenna and left side window) • Navigation system (roof antenna) • Telephone (roof antenna) additionally: - Bluetooth antenna under the center console for mobile phone connection - Emergency antenna, rear left (only in conjunction with Telematics Control UnitTCU) 26 E70 Audio Systems IKT Antennas JS ■ dab am |fm Btv ■fbd Index Explanation Index Explanation 1 Bluetooth antenna 5 Antenna amplifier with diversity module 2 Roof antenna(navigation, telephone, digital tuners) 6 SOS antenna 3 TV2 amplifier (not for U.S.) 7 TV1/DAB band III amplifier (not for U.S.) 4 TV3 amplifier (not for U.S.) 8 Blocking circuit and HBL filter 27 E70 Audio Systems In addition to the antennas listed above are the Antennas for the remote control (FBD) and the nine Antennas for Comfort Access (four on the outside and five in the interior). You will find further information in the "Central locking", "Comfort Access" and "Car Access System" Product Information documentation. The radio antennas for AM (waveband: LW, MW, KW) and FM (waveband: UHF) recep¬ tion are described below. The HBL filter is fitted to suppress interference pulses from the additional brake light dur¬ ing radio reception. The same unit houses the capacitor of the rear window heater block¬ ing circuit. The inductive resistor for the blocking circuit is located in the supply line of the rear window heating. Blocking Circuit and HBL Filter Index Explanation Index Explanation 1 Rear window heater, vehicle side Connector color code: black 4 Securing screw with ground connection 2 HBL filter, vehicle side Connector color code: black 5 HBL filter, rear window side Connector color code: purple 3 Rear window heater, rear window side Connector color code: white 28 E70 Audio Systems Rear Window Blocking Circuit Inductive Resistor Index Explanation Index Explanation 1 Inductive resistor 3 Connection, vehicle side Connector color code: black 2 Rear window connection 29 E70 Audio Systems Roof Antenna • Mobile phone antenna • Telematics Control Unit (TCU) telephone antenna • GPS antennal • SDARS satellite reception antenna. Index Explanation Index Explanation 1 Telephone antennas for mobile phone and Telematics Control Unit (TCU) 5 SDARS signal, satellite and terrestrial Connector color code: pink 2 SDARS antenna for satellite reception 6 Telephone signal: connector color code: Bordeaux violet 3 GPS antenna 7 Telephone signal: connector color code: Grey 4 GPS signal connector color code: blue Note: The telephone antennas for the mobile phone and the TCU are on differ¬ ent sides of the same circuit board. 30 E70 Audio Systems Radio Antennas The high-frequency signals of the radio stations are received by the spoiler antenna (AM and FM1) and the rear window antenna (FM2 and FM3). Antenna Amplifier with Diversity Module Index Explanation Index Explanation 1 VICS signal (not for US) 4 Rear window antennas (FM2, FM3, TV3) 2 Power supply and FBD 5 Spoiler antennas (AM, FM1) 3 Securing screw with ground connection 6 AM/FM tuner signal Connector color code: black The assignment of the antenna amplifier with diversity module may differ depending on the vehicle equipment. The TV3 signal is not currently used. The antenna amplifiers for AM and FM are supplied with DC voltage from terminal Rad_On when the radio is switched on. The high-frequency signals of the AM, FM1 antenna in the spoiler and of the FM2, FM3 antennas on the rear window are sent to the antenna amplifier with diversity module by means of a ribbon cable. Note: In US vehicles, the antenna amplifier also supports the frequencies of the weather band. Weather band is transmitted over seven channels in the frequency range from 162.400 MHz to 162.550 MHz. Note: The antenna amplifiers are in the Diversity module. There are separate amplifiers for AM and FM. The installation location is on the inside of the tailgate above the rear window. 31 E70 Audio Systems FM Antenna Diversity In the E70, an FM antenna diversity is standard equipment. The FM antennal diversity comprises: • FM1, FM2 and FM3 antennas • FM antenna amplifier with diversity module. The sequence of the FM antenna diversity is defined as: FM1 - FM2 - FM1 - FM3. It then switches back to the FM1 antenna again. The FM1 antenna has the best reception characteristics due to its location in the rear spoiler. The defined sequence in which the antennas are switched ensures that the FM antenna with the best reception characteristics has priority over the others. For SW, MW and LW reception, no antenna diversity system is provided as there is only one AM antenna available. The signal quality of the currently selected FM antenna (FM1 to FM3) is evaluated in the diversity module. The antenna diversity module will switch to the next FM antenna if the signal quality of the current radio station on the active antenna deteriorates to a certain level in terms of quality and field strength. The switching takes place such manner that no interruption can be detected. The high- frequency signal from the active FM antenna at any particular time is fed by the antenna amplifier and Diversity module via a co-axial cable to the tuner in the radio or navigation system. The signal is then de-modulate in the tuner and output in the form of an audio signal through the speakers. The radio or navigation system detects that a diversity module is installed and generates the changeover voltage Us and the signal of the intermediate frequency (ZF) necessary for diversity operation. The ZF signal is analyzed by the electronic circuitry in the diversity module and is a copy of the currently selected radio station transmission on a fixed fre¬ quency of 10.7 MHz. The switch between AM reception, FM diversity operation and diagnostics mode occurs in response to changeover voltage Us. This is generated by the radio and analyzed in the diversity module. Diversity operation is active when Us= 2.5 V. AM mode is active, or the FM1 antenna is selected, when Us = 0 V. Diagnostics mode is active when Ds = 5 V. 32 E70 Audio Systems In total, up to three signals are therefore applied on the coaxial cable simultaneously. • HF signal (e.g. 87.5 - 108 MHz) from the diversity module to the radio • Control DC voltage Us from the radio to the diversity module • Intermediate frequency (fZF = 10.7 MHz) from the radio to the diversity module as the basis for evaluating the quality of the HF signal. Note: Mutual influencing is not possible due to the different frequencies. Digital Tuners SDARS (Satellite Digital Audio Radio Service) V \*J & Index Explanation Index Explanation 1 Power supply 3 SDARS signal Connector color code: pink 2 MOST SDARS enables you to receive digital radio signals and therefore enhances AM and FM reception. Digital transmissions are superior in quality to analogue transmissions. The satellite radio stations can be selected using the additional "SAT" menu item in the Drive. 33 E70 Audio Systems Advantages of digital satellite radio: • Reception of same radio station across the entire US mainland (excluding Alaska) • Digital reception of music, news and talk stations • Wide choice of available music • No commercial breaks • Digital signal transmission provides greater immunity to external interference. The SDARS system developed by Sirius Satellite Radio is supported. This uses three satellites which follow an elliptical orbit around the Earth. Because of the arrangement of the orbits, there are always two satellites over the reception area. In areas without cover¬ age, the SDARS signals are beamed terrestrially. Both SDARS signals (satellite and ter¬ restrial) are received by an antenna patch in the roof antenna and made available to the SDARS control module. To make use of the signal, the feature must be enabled by the service provider Sirius. Note: The separate satellite tuner is necessary because the signals are trans¬ mitted in the gigahertz band (microwave band).The satellite tuner is located in the luggage compartment on the left-hand side. 34 E70 Audio Systems CD Changer The new 6-disc CD changer (CDC) is available for the E70 the first time that a single-slot CD changer has been fitted in a BMW vehicle. It is manufactured by Alpine. The CD changer is integrated on the MOST network. Index Explanation Index Explanation 1 Buttons for operating trays 5 CD drive eject button 2 Load button for CD drive 6 MOST 3 Status display 7 Power supply 4 CD drive slot 35 E70 Audio Systems Single-slot CD Changer Shutter (Front view without trim panel) i Index Explanation Index Explanation 1 Shutter closed 2 Shutter open Single-slot CD changer means that the CDs are loaded individually into the device with¬ out a magazine. A CD can be loaded by pressing the load button, followed by the button for the operating tray of the CD to be inserted. If no button is pressed after the load but¬ ton has been tapped, the LED in the operating tray button assigned to the first free tray flashes. In the meantime, the tray moves into position. When the tray is in the correct position, the status display begins to flash and the CD can be loaded. The contents of the CD are read as soon as the CD is inserted. The next CD cannot be inserted until the contents of this CD have been read. The rapid loading fea¬ ture must be activated to be able to insert all CDs immediately one after the other. To do this, the load button must be pressed for approximately 2 seconds. The LEDs in the operating buttons assigned to free trays begin to flash. Up to 6 CDs can be inserted one after the other, depending on the number of trays free. The contents of the CDs inserted are read either once the final free tray has been filled, on expiry of a time out or if the load or eject button is pressed. An individual CD can be ejected by pressing the eject button followed by the operating button concerned. Pressing and holding the eject button ejects all the CDs. The CDs cannot be loaded unless the shutter is open. The status display flashes when it is possible to insert a disc. Operation is described in detail in the Owner's Handbook for the vehicle. 36 E70 Audio Systems Single-slot CD Changer Installation Location The CD changer supports the following compressed file formats: • MPEG-1 Layer 3 Audio (MP3) with ID3 tag version 1 and version 2 • Windows Media Audio (WMA) with WMA tags • Advanced Audio Coding (AAC). These files are decoded in the CD changer. The CD changer is accessible when the glove compartment is open. The following graphic shows how the CD changer is con¬ nected to the cross-member. The data on the CD is decoded by the CD changer and converted into the digital MOST format. If the vehicle is eguipped with the stereo or HiFi speaker system, the digital data on the CD is sent to the head unit via the MOST. Here they are converted to analogue data and output via the amplifier and the speakers. If the Top-HiFi system is installed, the decoded audio data is sent directly to the Top- HiFi amplifier via the MOST from where it is output. This direct transmission bypassing the head unit is made possible because data conversion and sound adjustment take place exclusively in the Top-HiFi amplifier. 37 E70 Audio Systems Retrofitting a CD Changer The fiber optics conductors for connecting the CD changer are arranged at the fiber optics connector in the luggage compartment such that they are not incorporated in the MOST ring. After retrofitting a CD changer, the fiber optics conductors for the CD chang¬ er preparation are unplugged at the fiber optics connector and connected to the MOST ring. It is then necessary to code the entire vehicle. Audio Jack The audio jack is used to connect an external audio source such as MP3, cassette or CD playback devices. The audio jack (Aux In) is standard equipment in the E70. It is located below the center armrest. A 12-V socket outlet is located in the immediate vicinity of the audio jack. 38 E70 Audio Systems Service Information Diagnosis It is possible to run diagnostics on the HiFi amplifier thanks to its connection to the K- CAN. The following measures have been implemented to minimize interference during AM and also FM reception: • Tailgate hinges with integrated ground straps • Low-noise AM and FM antenna amplifiers • ground connection on both silencers • Shielded Wave barrier. An audio test CD is available from the EPC that can be used to test drives. The BMW diagnostic system contains the control module entries listed in the table: CHAMP Professional radio CCC Professional navigation system CHAMP-GW CCC-GW CHAMP-BO CCC-BO CCC-A CCC-ANT CCC-ASK Key for the table above: Index Explanation Index Explanation GW Gateway A Applications BO User interface ANT Antenna tuner NAV Navigation system ASK Audio system controller 39 E70 Audio Systems Reset All head units can be reset by following the procedure described below: • Switch system ON/OFF • BMW diagnostic system • Disconnect from vehicle electrical system. There is no specific button or button stroke combination on the CHAMP for performing a reset. The CCC can be reset by simultaneously pressing and holding the eject buttons on the DVD and CD player and the rotary push button for approximately 10 seconds. The CID becomes blank. The CCC is then restarted. Note: The MOST gateway (CHAMP, CCC) is muted for 2 seconds when a MOST control module is reset. Service Concept The CHAMP is replaced as complete units. The service concept of the CCC permits replacement of individual assemblies. The following assemblies can be replaced: • Fan • CD and DVD player • Front panel • HIP • Yaw rate sensor. Note: Observe the ESD guidelines in case of replacement. The CCC must not be stood on its rear panel as the sockets may be damaged by the weight of the unit. In diagnostics, the following diagnostic gueries can be issued for the amplifiers available: HiFi Amplifier • Responds to diagnostics thanks to K-CAN connection • Separate control of individual audio channels 40 E70 Audio Systems Top-HiFi Amplifier • Output of sinus tones by means of an internal sine-wave generator (configurable parameters: freguency, volume, speaker channel) • Separate control of individual audio channels Antenna Diagnosis Antenna diagnostics on the E70 proceeds in the same way as diagnostics on the BMW 3 Series (E90, E91, E92), BMW 5 Series (E60, E61) and BMW 6 Series (E63, E64): The self-diagnosis procedure for the diversity module is initiated in the diagnosis module of the BMW diagnosis system. The self-diagnosis comprises a check of the antenna inputs based on a DC measurement. If the check proves positive, each individual FM antenna is switched on one after the other in a specified seguence and the signal guality evaluated (antenna scan). The AM reception can be evaluated in the LW, SW and MW range with the AM amplifier switched on and off. The diagnosis system evaluates the measurements and deduces the status when the self-diagnosis of the diversity module provides a positive result. This procedure can also be carried out manually by switching the CHAMP into service mode: The signal guality and field strength of the station currently tuned in can be displayed in service mode. Service Mode Service Mode is Accessed as Follows: • Open Start menu • Press and hold the controller for at least 10 seconds • Move the controller 3 stops to the right • Move the controller 3 stops to the left • Move the controller 1 stop to the right • Move the controller 1 stop to the left • Move the controller 1 stop to the right • Press the controller once. Note: To exit Service mode press the Menu button. 41 E70 Audio Systems Note: Low values with regard to signal quality and field strength may indicate to damaged antennas or the absence of terminal Rad_On. Terminal Rad_On supplies power to the antenna amplifier and the diversity module. Hissing or Interference on Radio Check the following in the event of hissing or interference with radio reception: • Station tuning • Mechanical damage to the antenna structure • Power supply terminal Rad_On for the antenna amplifiers in the diversity module. • Antenna connector at diversity module • Diversity module connected to ground by securing screws • Antenna connector on radio or navigation system. The following measures have been taken in the E70 to minimize reception interference of AM and FM stations: • Tailgate connected to ground by the tailgate hinges with integrated ground straps • Low-noise AM and FM antenna amplifiers with direct ground connection • Ground connection on the left and right silencer • Shielded Wave barrier. The ground connection on the two silencers helps to suppress interference transmitted from the engine compartment (ignition electronics) along the exhaust system. The exhaust system is a wave guide and, if no ground straps are used, it carries high-fre¬ quency interference to the rear end of the vehicle. At the end of the exhaust system, the interference is radiated out and couples into the antenna structures located at the rear of the vehicle. The ground straps on the silencers connect the interference to ground, there¬ by suppressing the interference. These ground connections have already been fitted to the BMWX5 (E53). The shielded wave barrier connects to ground the screen of the coaxial line between the head unit and antenna diversity on the D-pillar. Interference transmitted by the screen is therefore conducted away to ground. 42 E70 Audio Systems CD Changer If the eject button is no longer working, a CD can be ejected using the diagnostic tester. If the CD is mechanically jammed in the drive, it is necessary to send in the CD changer. When the MOST bus enters sleep mode, the contents of the CD that has been inserted and read is stored inside the head unit. There is therefore no need for this data to be read once more when the MOST boots up again. The data is not saved in the event of a low voltage situation before the MOST has entered sleep mode or a voltage interruption with the MOST active. For this reason, the contents of the inserted CDs have to be read once more when the MOST boots up. 43 E70 Audio Systems