Design
Design
Rear seat entertainment module (RSE)
The rear seat entertainment module (RSE) is enclosed in a steel casing with installation holes. In the S80, the control module is located in the centre console below the DVD player. In the XC90, it is located below the centre console between the driver's and passenger seat. The control module is driven from Ext.X-feed in the central electronic module (CEM).
The central unit of the rear seat entertainment system is the rear seat entertainment module (RSE), which interprets and implements the commands issued by the user via the system's infrared remote control. These commands are forwarded to the rear seat entertainment module (RSE) via the system's infrared receiver in the screens. The rear seat entertainment system (RSE) also distributes current to the system and detects the status of the vehicle ignition via a sensor lead that runs from the control module to the vehicle ignition switch. This prevents battery consumption when the vehicle is not in use.
The rear seat entertainment module (RSE) receives audio and video signals from the DVD player and the vehicle's TV receiver (if installed). It is also possible to receive additional input audio/video and output a two-channel audio output at low level via the AUX inputs.
Rear audio separation module (RAS)
The rear audio separation module (RAS) is enclosed in a casing of ribbed aluminium with installation holes.
The rear audio separation module is a unit with dual functions. The first is the production of continual infrared signals via "control module infrared transfer" for "wireless headphones" (audio is in headphone mode as standard). The second is integration with the vehicle's rear speakers for media selection.
Screen, head restraint
The multimedia head restraint consists of five main components:
- Screen
- Circuit board
- Rear piece
- Border
- Head restraint pad
The rear piece is fastened in an opening on the rear of the head restraint pad. The circuit board is held in place in the rear piece with three screws. The screen is housed in the rear piece in front of the circuit board and is connected with a flexible foil cable and an AC lead. The border holds all electronic components in place in the rear piece in the head restraint pad. The lower edge of the border contains a window so that the infrared receiver on the circuit board can receive infrared signals from the remote control. The infrared receiver is separately connected to the rear seat entertainment module (RSE) and is activated when the rear seat entertainment module (RSE) is on.
The 7-inch screen 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 integrated infrared receiver is activated when the rear seat entertainment module (RSE) is supplied power. The screen is activated once the receiver obtains an infrared "switch-on command" from the remote control. The circuit board contains an image generator, an infrared receiver and a unit that controls all screen settings:
- colour
- contrast
- brightness
- aspect ratio.
Contrast control has a contrast ratio of 30:1 to improve the image and reduce sharp light from bright daytime conditions down to complete darkness. Brightness can be adjusted so that the image on the screen is clear even in daylight. The circuit board is also responsible for voltage protective and the power supply to the screen's background illumination. The control module contains logic for interpreting commands for setting video output, input selections and background illumination brightness.
The screens are supplied power and grounded via the rear seat entertainment module (RSE).
DVD player
The DVD player has a compact chassis and border in miniature format that is ideal for tight installation locations (148 mm x 55 mm x 160 mm). The DVD player has standard ISO connections. Its mechanism is resistant to vibrations and works to avoid the image or audio becoming choppy during playback. The DVD player has slot-in disc feed with region coding programmed into the software. The DVD player has video output in NTSC or PAL format depending on the format of the DVD disc. The player is completely integrated with the rear seat entertainment system and is controlled with the infrared remote control via the rear seat entertainment module (RSE). The operating temperature of the player is -20 to +70 °C.
Introduction of a new DVD player is planned for week 5 2005. The new and improved DVD player can read DVD-R/+R, DVD-RW/+RW, CD-R and CD-RW discs and can play MP3 files. The "+" and "-" buttons can now be used to change chapters in a DVD movie or jump to the next track on a CD.
The DVD player is supplied power and grounded via the rear seat entertainment module (RSE).
Headphones
The wireless IR headphones are compatible with both screens. IR transfer is used to transfer standard audio to the headphones in two-channel stereo format. The headphones are powered by internal batteries. The headphones are switched on with a button on one side while the volume of the respective headphones is adjusted with a wheel. Each set also has a channel selector that controls which audio source the set of headphones receives.
External input
The armrest (S80) or the rear of the centre console (XC90) houses an AUX panel with external input connections for audio/video. This input can be used for inputting standard AV signals to the system. Such signals include video camera, Dreamcast, Nintendo, Playstation, Playstation 2, VHS videotapes, portable DVD or CD player.