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Home >> Land Rover >> 2007 >> Range Rover (LM) V8-4.4L >> Repair and Diagnosis >> Accessories and Optional Equipment >> Radio, Stereo, and Compact Disc >> Description and Operation >> Description >> Audio System

Audio System



Audio System

The Digital Signal Processor (DSP) audio system comprises:
^ DSP amplifier
^ Touch Screen Display (TSD)
^ Integrated Head Unit (IHU)
^ Six disc CD (compact disc) autochanger
^ 11 Speakers

The Harman/Kardon Logic7 audio system comprises:
^ Logic7 amplifier
^ TSD
^ IHU
^ Six disc CD (compact disc) autochanger
^ 14 Speakers

Touch Screen Display







The Touch Screen Display (TSD) forms the basis of the audio system. It communicates with the rest of the audio/infotainment system on the MOST ring and allows control of the audio system and other infotainment systems from a single point.

The TSD communicates with the Integrated Head Unit (IHU) on the MOST ring and provides the driver interface and driver display of the audio system. The TSD also provides driver display and control of the telephone, the rear view camera, the Venture Cam, the navigation system, the Traffic Message Channel and the rear seat entertainment.

The audio system and other systems are operated by a combination of the physical buttons located on each side of the screen and the 'virtual' buttons displayed on the touch screen. For clarification, the physical buttons are referred to as 'buttons' and the touch screen virtual buttons are referred to as 'icons'.

The TSD is a touch sensitive, 800 X 600 pixels LCD VGA screen which displays in a 15.9:1 format.

Care should be taken with the TSD to ensure its correct operation:
^ The screen should be cleaned with a lightly, water moistened cloth. Do not use chemical agents or domestic products to clean the screen or any part of the surround.
^ Only use your finger to operate the touch screen. Ensure you only use one finger to avoid incorrect entries.
^ A short light press of the touch screen is sufficient. Excessive pressure can damage the screen.Six connectors provide the interface between the TSD and the other system components.

Six connectors provide the interface between the TSD and the other system components.

TSD Connector C2819







TSD Connector C2820







TSD Connector C2823







TSD Connector C2825







TSD Connector C2826







TSD Connector C2827







On-Board Computer
The on-board computer functions can be accessed by from the TSD, by pressing the on-road information button on the LH (left-hand) side of the TSD. After pressing this button the last displayed screen in the on-road information selection appears in the TSD. The following screens are available in the on-road information screen:
^ Fuel and temperature
^ Speed
^ Stopwatch
^ Trip settings.

TSD Diagnostics

NOTE:
^ Fault codes can also be retrieved using T4.
^ The navigation computer also has an on-board diagnostic mode which is accessible using the TSD.

The TSD has an on-board diagnostics capability to allow the functionality of the following to tested:
^ touch screen icons
^ Touch screen surrounding physical buttons
^ Vehicle input signals
^ Video inputs
^ RGB color display
^ Self test with fault codes displayed (if applicable)
^ Configuration settings of the TSD
^ Vehicle configuration
^ MOST ring function

Use the following procedure to get access to the diagnostic screens.
^ Insert the vehicle key in the ignition switch and turn to the ignition position II.
^ Once the 'CAUTION' screen has been displayed, press the 'AGREE' virtual button in the bottom right hand corner of the TSD. The 'Home Menu' will be displayed.
^ In a central position at the top of the TSD, press the screen and hold for 5 seconds, then release and press and hold the navigation physical button for 5 seconds and release. A 'Diag PIN Entry' box will appear.
^ In the 'Diag PIN Entry' box, enter the diagnostic PIN entry code of '753' and press the 'OK' icon on the TSD. A 'Diagnostics Menu' screen will appear.
^ The following selections can be made from the 'Diagnostics Menu' screen. Hard Key Test (physical buttons) Touch Switch Test (virtual icons) Vehicle signals Video Inputs Test RGB Color Test Self Test Configurations Vehicle Configurations MOST Test
^ Hard Key Test (physical buttons)
^ Touch Switch Test (virtual icons)
^ Vehicle signals
^ Video Inputs Test
^ RGB Color Test
^ Self Test
^ Configurations
^ Vehicle Configurations
^ MOST Test
^ Once a screen display is complete, you can return to the previous menu screen by pressing the return icon in the top right hand corner of the TSD.
^ Hard Key Test This screen displays a 'Hard Key Test Form' screen. The hard key test verifies the correct function of each of the physical buttons which surround the TSD. Pressing each button in turn will turn the applicable icon in the TSD green if the button is functioning correctly.
^ This screen displays a 'Hard Key Test Form' screen. The hard key test verifies the correct function of each of the physical buttons which surround the TSD. Pressing each button in turn will turn the applicable icon in the TSD green if the button is functioning correctly.
^ TouchSwitch Test This screen displays the 'Touch Switch Test' screen which gives two selections; 'Start Calibration' and 'Touch Switch Check'. The 'Start Calibration' screen allows re-calibration of the screen. The touch screen co-ordinates can be aligned by pressing a series of on screen targets. To return to the 'Touch Switch Test' screen, press the 'Navigation' physical button. The 'Touch Switch Check' screen displays a blank screen. Touching the screen will display a series of co-ordinates for the area of the screen which has been touched. This can be used to check if an area of the screen has a fault.
^ This screen displays the 'Touch Switch Test' screen which gives two selections; 'Start Calibration' and 'Touch Switch Check'.
^ The 'Start Calibration' screen allows re-calibration of the screen. The touch screen co-ordinates can be aligned by pressing a series of on screen targets. To return to the 'Touch Switch Test' screen, press the 'Navigation' physical button.
^ The 'Touch Switch Check' screen displays a blank screen. Touching the screen will display a series of coordinates for the area of the screen which has been touched. This can be used to check if an area of the screen has a fault.
^ Vehicle Signals The vehicle signals screen displays inputs from other vehicle systems. The screen shows the 'real time' parameters and status of the following: Battery voltage Lights (on/off) Ambient light sensor voltage Backlight dimming duty (PWM (pulse width modulation) %) Graphic illumination dimming duty (PWM (pulse width modulation) %) Output audio allocation (AM (amplitude modulation) /FM (frequency modulation) tuner, CD (compact disc), Navigation, DVD, TV) PCB Temperature Speed inhibit (overspeed) (on/off) MOST FOT temperature (degree C) Parking position (Park brake on/off) Backlight PWM (pulse width modulation) duty Beep volume Beep tone.
^ The vehicle signals screen displays inputs from other vehicle systems. The screen shows the 'real time' parameters and status of the following:
^ Battery voltage
^ Lights (on/off)
^ Ambient light sensor voltage
^ Backlight dimming duty (PWM (pulse width modulation) %)
^ Graphic illumination dimming duty (PWM (pulse width modulation) %)
^ Output audio allocation (AM (amplitude modulation) /FM (frequency modulation) tuner, CD (compact disc), Navigation, DVD, TV)
^ PCB Temperature
^ Speed inhibit (overspeed) (on/off)
^ MOST FOT temperature (degree C)
^ Parking position (Park brake on/off)
^ Backlight PWM (pulse width modulation) duty
^ Beep volume
^ Beep tone.
^ Video Inputs Test The video inputs test screen allows the video inputs from the Venture Cam, Rear View Camera and the TV/DVD to be tested. Pressing the 'Companion Camera' icon enables the Venture Cam display. The Venture Cam must be removed from its docking station and switched on. The display can be switched between PAL and NTSC and also in two wide-screen formats and a normal view. Pressing the 'Rear View Camera' icon enables the rear view camera display. The display can be switched between PAL and NTSC and also in two wide-screen formats and a normal view. Pressing the 'TV/DVD' icon enables the display from the TV tuner or the DVD player. The display can be switched between PAL and NTSC and also in two wide-screen formats and a normal view.
^ The video inputs test screen allows the video inputs from the Venture Cam, Rear View Camera and the TV/DVD to be tested.
^ Pressing the 'Companion Camera' icon enables the Venture Cam display. The Venture Cam must be removed from its docking station and switched on. The display can be switched between PAL and NTSC and also in two wide-screen formats and a normal view.
^ Pressing the 'Rear View Camera' icon enables the rear view camera display. The display can be switched between PAL and NTSC and also in two wide-screen formats and a normal view.
^ Pressing the 'TV/DVD' icon enables the display from the TV tuner or the DVD player. The display can be switched between PAL and NTSC and also in two wide-screen formats and a normal view.
^ RGB Color Test The RGB color test form screen allows the TSD color outputs to be tested. By pressing each color in turn, the whole screen is displayed in that color and the whole screen area can be checked for uniform color display. Pressing the screen a second time returns to the RGB color test form screen.
^ The RGB color test form screen allows the TSD color outputs to be tested. By pressing each color in turn, the whole screen is displayed in that color and the whole screen area can be checked for uniform color display. Pressing the screen a second time returns to the RGB color test form screen.
^ Self Test The 'Self Test' screen displays the current ignition switch position, the battery output voltage and the diagnostic session. After a few seconds, the display will show any existing fault conditions in the form of a diagnostic trouble code and a brief description.
^ The 'Self Test' screen displays the current ignition switch position, the battery output voltage and the diagnostic session. After a few seconds, the display will show any existing fault conditions in the form of a diagnostic trouble code and a brief description.
^ Configurations The 'Configurations' screen allows the data for the TSD and also the Navigation Computer to be displayed. The display can be switched between the TSD and the Navigation computer by pressing the icon in the top left hand corner of the screen, which displays either 'Show MMM Information' (navigation computer) or 'Show HLDF Information' (TSD). Each screen shows the following information: Vehicle Type Serial Number Part Number / Parts Level Land Rover Software Version MOST SWDL Block Size Main CPU Software/Bootloader Versions Main CPU Application Version Sub CPU Software Version Private CAN (controller area network) Database Version
^ The 'Configurations' screen allows the data for the TSD and also the Navigation Computer to be displayed. The display can be switched between the TSD and the Navigation computer by pressing the icon in the top left hand corner of the screen, which displays either 'Show MMM Information' (navigation computer) or 'Show HLDF Information' (TSD).
^ Each screen shows the following information:
^ Vehicle Type
^ Serial Number
^ Part Number / Parts Level
^ Land Rover Software Version
^ MOST SWDL Block Size
^ Main CPU Software/Bootloader Versions
^ Main CPU Application Version
^ Sub CPU Software Version
^ Private CAN (controller area network) Database Version
^ Vehicle Configurations The 'Vehicle Configurations' screen has four separate screens which show information for each of the audio/navigation system components. Each screen can be displayed by pressing the 'Next' icon in the bottom right hand corner of the screen. A previous screen can be displayed by pressing the 'Prev.' icon adjacent to the 'Next' icon.
^ The 'Vehicle Configurations' screen has four separate screens which show information for each of the audio/navigation system components. Each screen can be displayed by pressing the 'Next' icon in the bottom right hand corner of the screen. A previous screen can be displayed by pressing the 'Prev.' icon adjacent to the 'Next' icon.
^ MOST Test The 'Most Test Form' screen shows the information being passed on the MOST ring for each driver input. For example, when the screen is displayed, adjusting the volume control using the TSD rotary control or the steering wheel switches will show the MOST ring signals being transmitted. This can be repeated for each function to establish that the driver request is being transmitted on the MOST ring.
^ The 'Most Test Form' screen shows the information being passed on the MOST ring for each driver input. For example, when the screen is displayed, adjusting the volume control using the TSD rotary control or the steering wheel switches will show the MOST ring signals being transmitted. This can be repeated for each function to establish that the driver request is being transmitted on the MOST ring.

Integrated Head Unit (IHU)







The Integrated Head Unit (IHU) is located behind the TSD. The IHU contains the radio functionality for the audio system. The IHU communicates on the MOST ring with the components in the audio system. The IHU is also the timing master for the MOST ring. The IHU is the controls and manages the MOST ring and provides the allocations of channels, system power management and the functionality and co-ordination of the other system components.

The IHU also controls the operation of the infotainment relay. The infotainment relay is located in the rear fusebox and the relay coil is controlled by the IHU which provides a ground for the coil. The relay supplies power to a number of the audio system components.

Radio signals are received by antennae located in the left hand rear quarter window and the rear screen. An FM (frequency modulation) antenna amplifier is located in the upper taildoor and passes AM (amplitude modulation) /FM (frequency modulation) signals from the rear screen antennae to the IHU. A diversity antenna is located in the left hand rear quarter window. A FM (frequency modulation) diversity antenna amplifier is located behind the left hand luggage compartment trim panel, below the window and passes FM (frequency modulation) radio signals from the rear quarter window diversity antenna to the IHU. The FM (frequency modulation) diversity system uses a multi-antenna system which selects the strongest signals from the antennae. In weak signal areas the amplifier uses an integral ultrasonic noise detector to find the least distorted antenna signal to ensure maximum reception quality is maintained.

Diagnostic messages retrieved via T4 are routed from the IHU through the instrument pack, prior to being transferred to the diagnostic socket.

IHU Connector C1354







IHU Connector C2115







IHU Connector C2105







IHU Connector C0738







6 Disc CD (compact disc) Autochanger







The six disc CD (compact disc) autochanger is located at the rear of the glove compartment. The CD (compact disc) autochanger is a standard fitment on all 2005 MY Range Rovers. The CD (compact disc) autochanger is capable of playing audio CD (compact disc) s and MP3 CD (compact disc) s. The autochanger uses a six disc magazine which is loaded into an aperture on the front of the unit.

The CD (compact disc) autochanger is connected on the MOST ring and receives a permanent fused power supply from the passenger compartment fusebox.

CD (compact disc) Autochanger Connector C0941





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