Renault Service Manual System
The control module is central to the Entertainment system. It interprets and implements commands entered by the user using the system’s infrared remote control. These commands are relayed to the control module via the system’s infrared sensors mounted in the screen modules. It also distributes power to the system and detects the vehicle’s ignition state via a sense wire running from CN1 to the vehicle’s ignition switch.
This enables it to limit battery drain whilst the vehicle is not in use. The control module receives audio and video inputs from the DVD Player via connector CN1 and from the vehicle’s TV tuner (if fitted) via connector CN2. It is also able to receive a further audio/video input and supply a low-level two-channel audio output via CN3. Technical Description: Technical Description: Technical Description: Technical Description: A micro-controller in the Control Module supplies and controls the power to the system via an I 2 C bus. On receipt of a power-on command from the Infrared Controller it performs a simple system check and then sends commands to other parts of the system to bring them on line. When a screen has been selected using the infrared remote control the Control Module identifies the selected screen and displays on it a menu providing the user with access to the functions detailed below: “Independent switching of three Audio-Visual inputs (DVD, TV and AUX) “Video manipulation (Colour, brightness, contrast and aspect ratio of the display.) “Audio processor (Bass, Treble and Volume) “On-Screen instructions language selection “Switch on/off individual screen displays The Control Module also determines which media source has been routed to the selected screen and relays commands in the appropriate protocol. For example if, while Screen A is displaying the DVD transmission, an infrared play command is detected at screen A, it would be captured, stored and relayed to the DVD in the DVD’s Infrared protocol. If screen B is displaying a TV transmission the play command would be transmitted in the vehicle’s TV tuner infrared protocol. A non-volatile memory stores the display instruction language in use and the current Audio and Video settings for each output channel. These settings are reloaded on power-up with the exception of the audio volume level, which defaults to a low state. Support equipment that has been powered off is detected by the lack of video sync pulse. This can be caused by auto shutdown after extended pause mode. When this happens the module responds by transmitting a power-on command to the support equipment until it is ready to accept it and power up. The supply of the video sync pulse then resumes and the module stops transmitting the power-on command.
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