Design
Design
Rear seat entertainment module (RSE)/DVD-player
Rear seat entertainment module (RSE) is the central unit in the system for rear seat entertainment.
The control module is integrated with the DVD player and is located in the storage tray in the center console. In XC90 it is located at the rear edge of the center console.
The control module interprets and executes the commands given by the user with the system's infrared remote control. These commands are transmitted from the remote control to Rear seat entertainment module (RSE) via system's infrared receivers in the screens. Rear seat entertainment module (RSE) also distributes current to the system's other components.
The Rear seat entertainment module (RSE) distributes audio and video signals from the DVD player or digital TV receiver to the screen and speakers in the system. Other audio and video sources can be connected via external inputs (AV panel), for example, games consoles or video cameras.
There is an internal CAN network between the Rear seat entertainment module (RSE)/DVD-player and the screens for the transfer of information. This CAN network is not connected to the vehicle's ordinary CAN network.
The DVD player mechanism has an anti-shock system and it helps to prevent the image or sound skipping when played. The DVD player has slot-in disc insertion and region coding programmed into the software. The region code can be changed using a security code.
The following media formats can be played by the DVD player:
- DVD-R/+R
- DVD-RW/+RW
- CD-R and CD-RW
- CDDA
- HDCD
The following information formats can be played:
- DVD
- DVD Audio
- VCD
- SVCD
- DivX
- WMV
- Audio CD
- Kodak photo CD
- MP3
- MP3 Pro
- playlists in M3U format
- WMA Sound.
Formats such as THX and DolbyDigital are also supported. Only stereo signals of this audio format are reproduced.
The control module is supplied with power from the Ext.X-supply in the Central electronic module (CEM) and directly from the battery.
To easily check whether the control module is powered and grounded, switch on the ignition. The background illumination on the function buttons should then come on.
Change of DVD player region code
The region coding means that only discs with the region code matching that of the DVD player can be played.
The region code in the DVD player can be changed up to 25 times. After the last change, the set region will be locked and it will not be possible to change again.
Note! Warranty repairs due to locked region on the DVD player will not be approved. Region code changes to the region in which the vehicle will be used is to be done at the workshop. The security code is not to be given to the customer.
Do as follows to open the menu for region code change:
1. Switch on the ignition.
2. Switch on the system.
Note! There must not be a disc in the DVD player.
3. Direct the remote-control towards one of the screens and press and hold the Day/Night switching button for approx. 5 seconds. The SERVICE MENU will now be shown with four stars below.
4. Enter the code 1971 using the arrow keys on the remote control and then press OK.
5. Select menu REGION CODE and press OK.
6. Select the region code which applies to the relevant vehicle and press OK.
7. Check that the set region code, which will be shown in the top left-hand corner of the screen corresponds with the region where the vehicle will be used.
8. Switch off the system.
The submenu can then be used to select a new region for the DVD player.
AUX-input
S80/V70/XC70
XC90
In order to playback audio from the rear seat entertainment system using the vehicle's ordinary audio system, the Rear seat entertainment module (RSE) is connected to the regular AUX input.
The AUX-input is a 3.5 mm stereo connection and can be used to connect, e.g., a portable CD-player or other media player to the system.
The connection is breaking which means, if nothing is connected, it is the audio signals from the Rear seat entertainment module (RSE)/DVD-player that are forwarded to the Integrated Audio Module (IAM).
When something is connected, this connection is broken and the audio from the connected unit is forwarded instead to the Integrated Audio Module (IAM).
Internal electrical connections:
- AUX input connection #1 is internally connected to AUX input #7.
- AUX input connection #2 is internally connected to AUX input #6. The circuit is broken when a 3.5 mm plug is connected.
- AUX input connection #3 is internally connected to AUX input #5. The circuit is broken when a 3.5 mm plug is connected.
Screen, head restraint
The multimedia head restraint consists of the following main components:
- Screen unit with integrated holder and circuit board.
- Head restraint pad.
The screen is attached to the opening on the rear of the head restraint cushion and is held in position in the head restraint cushion frame by two screws.
On the lower edge of the screen there is a window so that infrared signals (IR) from the remote control can be received by the infrared receiver on the screen's circuit board, and the integrated infrared red transmitter can send audio signals to the wireless headphones.
The 8-inch screen in the head restraint has an aspect ratio of 16:9. The screen is positioned to provide the optimal viewing angle. The screen has a 120 degree horizontal viewing angle.
The screen has an integrated temperature sensor that registers the temperature inside the screen. The temperature signal is sent to the Rear seat entertainment module (RSE)/DVD-player via the CAN network to prevent the use of the screens with a two high or low temperature.
The temperature is not monitored during the first 5 minutes after the ignition has been switched on. This is to prevent the system being switched off unnecessarily if, for example, the temperature is too high in the passenger compartment when the vehicle is started. If the temperature is high the climate unit is usually used to lower the temperature.
The following occurs:
- At +72 °C (-19 °C) a warning is shown on the screen. The warning message clears if the temperature changes to +70 °C (-17 °C).
- If the temperature changes to +77 °C (-24 °C) the system will also switches off.
Note! The temperature limits above apply inside the screen and not to the temperature in the passenger compartment.
The integrated infrared receiver is activated when the Rear seat entertainment module (RSE) is voltage fed. The receiver receives infrared signals from the remote control executes these commands.
The infrared receiver is also directly connected to the Rear seat entertainment module (RSE). When the ignition is switched on, the LEDs on the infrared receiver and transmitter should be slightly illuminated. The LEDs are on for approx. 2 minutes after the system has been switched on and when audio is played back from a selected audio source.
The screens are not activated until the system has been switched on using the POWER button on the remote control or the POWER button on the DVD player. Before the screens can be activated the Rear seat entertainment module (RSE) must establish communication with the integrated circuit board in the screens. This is performed directly when the ignition is switched on and normally takes approx. 8-10 seconds
The circuit board contains an image generator, infrared receiver, infrared transmitter and the unit that controls all screen settings:
- color
- contrast
- brightness
- aspect ratio.
The dampening control has a dampening factor of 30:1 to improve the picture and reduce sharp light from bright day conditions down to complete dark. The brightness can be adjusted so that the picture can be easily seen in daylight. The control module contains logic to interpret commands for setting video performance, input selection and the strength of the background lighting. Control commands are sent from the Rear seat entertainment module (RSE) via a private CAN network.
The screens are supplied power and grounded via the rear seat entertainment module (RSE).
To check whether a screen has power and ground, you can switch on the ignition and then switch on the system with the remote control. The screen will then come on.
Note! If the voltage supply and ground to the screen work, but the screen does not have contact with the Rear seat entertainment module (RSE)/DVD-player via the CAN network, the screen will start up and be lit in LOCAL mode. However this is not a guarantee that the complete system works.
For further information, see: Diagnostic functions Diagnostic Functions
If the screen works in LOCAL mode this indicates that the voltage supply and ground to the screen's circuit board are OK.
Remote control
The remote control is used to control the Rear seat entertainment module (RSE)/DVD player, screens, TV receiver (if the accessory is installed).
The remote control is available in 2 designs. If the system is equipped with TV the remote control has 17 buttons.
If the system is equipped with TV (DVB-T) the remote control has 29 buttons.
The remote control uses infrared signals (IR) to transfer commands to the system. The signals are received by the screens' infrared receivers.
The remote control is equipped with two batteries, fitted under a cover at the rear.
Headphones
The wireless headphones can be used on both screens. The sound to the headphones is transferred from the screen via infrared signals (IR) to the headphones in two channel stereo format. The headphones are powered by an internal battery.
The headphones are switched on using a button on the side and the volume, in each earpiece, can be adjusted using a knob. The headphones also have a channel selector which controls the audio channel received by the headphones. The sound from the left-hand screen is always sent on channel A and the sound from the right-hand screen is always sent on channel B. A LED is lit when the headphones are switched on.
AV-panel
S80/V70/XC70
XC90
There is an AV panel with external input connections for audio/video in the storage tray in the center console in front of the DVD player. In XC90 this is positioned at the rear of the center console.
This input can be used to feed standard AV signals to the system from e.g. a video camera, video games console, VHS video, portable DVD or CD player.
All inputs on the AV-panel are directly connected to Rear seat entertainment module (RSE)/DVD-player.
Digital TV receiver (DVB-T)
The digital TV receiver (DVB-T) is an extra option that can receive digital TV channels, convert them and send them on to the Rear seat entertainment module (RSE).
Two antennas are connected to the receiver so that the TV receiver is able to receive and send the channels.
DVB stands for Digital Video Broadcasting and is a series of internationally accepted open technical standards for digital television. The suffix "T" stands for Terrestrial and alludes to the subset of standards that regulate how a digital TV signal should appear when transmitted terrestrially.
The receiver in S80 (07-) is installed on the left-hand side inside the side panel, and in V70 (08-)/XC70 (08-) in the storage compartment below the cargo compartment floor.
In XC90 the receiver is installed in the cargo compartment, on the right-hand side under the cover above the wheel housing.
The following connections, switches and card slots can be found on the TV receiver:
1. Connection to the vehicle and Rear seat entertainment module (RSE) the two connectors.
2. Connections for two antennas.
3. Slot for a subscription/program card.
4. Serial communications port (serial port RS232).
5. Reset button.
6. Two functions switches.
7. Green status LED.
The TV receiver is voltage fed directly from the battery via connector #A4 for the Rear seat entertainment module (RSE) and then a fuse. The fuse holder is on the TV receiver.
To easily see whether the receiver is voltage fed and ground switch on the ignition. The status LED should then be lit green.
Subscription/program card
Used to watch paid-by-view channels.
Serial communications port (serial port RS232)
Used to connect a computer when updating the software.
Note! Special instructions are issued when this is to be performed.
Reset button
Used to restart the TV receiver when the ignition is on. Switching the ignition off and on has the same effect.
Function switches
Used to:
- Change the signal standard between PAL and NTSC.
- Switch the TV receiver to software update mode.
- Deleting stored TV channels.
The following settings are possible:
1. Normal mode
2. Software update mode
3. Mode to delete programmed TV channels.
4. Mode to change signal standard between PAL and NTSC.
To initiate one of the settings, proceed as follows:
1. Ignition on.
2. Set the switches to the required mode as set out above.
3. Ignition off and on again. This initiates the selected function. As an option the reset button can be used instead of switching the ignition off and on.
4. The selected function is now initiated.
When initiation takes place with the switches in the positions set out above the following occurs:
- Mode 2. A special menu to update the software is shown on the screens.
- Mode 3. All stored channels are deleted directly. A message about deletion is shown on the screens followed by a menu to restore the channels.
- Mode 4. The receiver switch the signal standard from either PAL to NTSC depended on the original setting. Each time the system is restarted (ignition off and on again) or when the reset button is used, the TV receiver switches between PAL or NTSC. The screens can handle both types of standard signals so that no difference in picture is seen.
Hint: If the customer comes in with his/her vehicle and complains about one of the following, the position of the switches, as set out above must be checked. Normally these should always be set in Normal mode.
- a software update menu is always shown on the screens when showing the TV.
- the stored TV channels are always deleted and a message is shown.
Antennas for digital TV receiver
The two antennas receive the transmitted digital TV signals and send these to the digital TV receiver. The antennas are voltage fed and ground from the TV receiver. A supply voltage of approx. 5 V is fed via the antenna cable's conductor and is ground via the cable's screen.
On each antenna, under the cover, is a status LED that lights when the digital TV receiver is on and the antenna is OK. If the system is on and the LED is not lit, there is either a fault on the antenna, its cables or the supply from the TV receiver.
The antennas are installed underneath the upper side corners on the rear bumpers.