Table of Contents Car C ommunication Computer (C C C) Subject Page CarCommunication Computer ...3 Components.4 Service Conceptforthe CarCommunication Computer Electronic Parts . Mechanical Parts . Working on Electronic Components . Preparatory Work. Replacement . System Functions. Voice Control System . System Integration . Functional Principle of Voice Control System . System Start/End . Initial Print Date: 12/04 Revision Date: to to to to co oo oo cr> cr> CarCommunication Computer(CCC) Model: E60, E61, E63, E64, E90, E91 Production: Start of Production MY 2004 After completion of this module you will be able to: • Recognize the CCC • Identify the main CCC components • Disassemble and repairthe CCC • Understand the operation of the CCC 2 CarCommunication Computer CarCommunication Computer In principle, the structure of the carcommunication computer corresponds to that of a personal computer. In the same way as a personal computer, the car communication computer contains a processor as well as RAM modules and other peripheral compo¬ nents. Certain functions such as the voice input control system are integrated in the form of software in the carcommunication computer. The carcommunication computer is the central control module for all applications. It is always coupled with the 8.8" split-screen central information display.The carcommuni¬ cation computer also features the high variant of the controller with haptic feedback. The carcommunication computer is based on a modular design, i.e. the main systems of the communication network are integrated in the form of modules in the carcommunica¬ tion computer. It can be configured and expanded corresponding to requirements. At the time of market launch, the following modules/functions will be integrated in the carcom¬ munication computer: • Radio double tuner • DVD navigation system, Professional (map presentation) • Voice control system • ASK functions • MOST-CAN gateway functions The following advantages are achieved by combining several control units in one module: • Increased functionality by combining several systems • Easy to expand/upgrade by means of software with corresponding interfaces • Fewer plug connections therefore fewer potential fault sources • Reduced package space for control units 3 Carcommunication Computer Components The car communication computer consists of several components: Housing CD-ROM drive DVD drive HIP-module (host independence positioning module) The car communication computer is accommodated in an aluminium casing. The size of the car communication computer corresponds to two radio DIN casings. The following types of CD can be played on the CD-ROM drive: - Audio CD - Audio CD-ROM with M P3 files Gyro sensor Tuner module Main board 1 ! -^ - J ML"™ When the navigation system is not in use, the DVD drive can also be used to play audio CDs oraudio CD-ROMs with MP3 files. Power board Audio board The HIP module contains the GPS receiverthat has the task of converting and decoding the signals received from the GPS aerial.: Memory module Front panel Front panel with Bluetooth moduie (not at SOP) PMC-card 1 for rear compartment entertainment (not at SOP) The gyro sensor is a separate module that is connect¬ ed via plug contacts to the main board and is secured by a screw. In addition to the CPU (Central Processing Unit)fur¬ ther processors and main memories are mounted on the main board.The main board also contains plug-in slots for expansion boards. PMC-card 2 open PCMCIA-card for memory expansion (not at SOP) Electric fan The power board is located at the rear of the car communication computer.The FAKRA main con¬ nector for the power supply and the MOST connec¬ tor are secured on the power board. The main con¬ nector provides the interface to the vehicle electrical system. The ASK functions are located on the audio board. Two digital sound processors facilitate simultaneous conditioning of the audio signals and operation of the voice control system. 4 Car Communication Computer Rearview of carcommunication computer 1. 12-pin connector, left 2. 12-pin connector, right 3. 16-pin connector 4. MOST connector 5 . Cover for expansion card 6. Connection forfan motor 7. Cover for expansion card 8. LVDS connector 9. GPS aerial connector 10. Fan motor 11. Radio aerial connector 1. Audio Board 2. Power Board 3. Main Board 5 CarCommunication Computer Service Conceptforthe CarCommunication Computer The service concept is such that individual modules and parts of the carcommunication computer can be replaced in the event of malfunction, thus serving to reduce repair costs. A differentiation is made between electronic and mechanical parts. Electronic Parts Replacement of the following electronic parts is planned: CD drive DVD drive Tunermodule HIP module Gyro Frontpanel Audio board Memorymodule PMC cards Electric fan Mechanical Parts Following mechanical parts are available: Top cover Bottom cover CD retaining fixture DVD drive holder Cover PMC slot Cover PCMCIA slot DVD drive retaining fixture CD drive holder Rubber mount for electric fan Particular attention must be paid to electrostatic discharge ESD when working on the car communication computer. Disregard of the safety requirements may result in damage to the electronic components in the carcommunication computer. Working on Electronic Components Preparatory Work The following points must be observed when working on electronic components of the carcommunication computer corresponding to the service concept: • All work must be carried out on a conductive and earthed workbench. • The special tool 12 7 192 is additionally used forthis purpose. • The earthing cable must be connected to a secure and reliable earthing point (water pipe, heating pipe, socket outlet earth). Before taking the parts out of their packag¬ ing, the person working on the components must first put on the wrist cuff in order to discharge himself.The electronic components are placed on the antistatic mat and also connected with the earthing cable. 6 Carcommunication Computer Replacement The electronic components must be replaced as described in the repair instructions and following the procedure described on SIP Electrostatic Fundamentals, while observing ESD safety measures. 1. Antistatic Mat 2. Ground Strap Antistatic Mat 3. Wrist Strap 4. Ground Strap Component Note: The Antistatic Mat at your Center may look different than the one shown here oratthe training center. Rememberthe following when using the Antistatic Mat: • Ground the Antistatic Matto the workbench using the attached lead • Attach the Grounding strap to the component being serviced • Always wearthe wrist cuff. 7 Car Communication Computer System Functions The car communication computer comprises the following functions: • Radio • DVD navigation, Professional (map presentation) • Voice control system • Online platform • Audio management • ASK functions • Driverfor central information display • MOST CAN gateway Voice Control System A voice control system High is integrated in the car communication computer. With this system, all functions shown in the CID can be controlled by voice commands. This sys¬ tem has the advantage that the hands need not be taken off the steering wheel while dri¬ ving in order to change settings. The SES can be used to control the following systems: • Entertainment • Communication • Navigation • Climate • "5th Menu" setting The voice control system makes use of specific voice commands. The voice control sys¬ tem sets up a dialogue with the user. Repeat requests are issued if the system did not understand a command. System Integration The voice control system is loaded as pure software in the car communication computer. The voice control system makes use of the memories and processors in the car commu¬ nication computers as well as the hardware of other systems (e.g. microphones). The two hands-free microphones in the front roof console are used in connection with the voice control system. The hands-free microphones are connected directly to the telematics control unit (TCU).TheTCU sends the microphone signals via MOST to the car communication computer where they are processed in the DSP in order to execute the required functions. 8 Car Communication Computer Functional Principle of Voice Control System System Start/End The voice control system is activated/deactivated via the push-to-talk button (PTT) on the multifunction steering wheel or on the controller. Forthe first time, the PTT button on the controller makes it possible forthe passengerto use the voice control system (SES). The SES is activated forthe driver by briefly pressing the button and forthe passenger by pressing and holding the button longer. The SES is deactivated by again pressing one of the PTT buttons. Activation of the SES is indicated by a graphic display (PTT logo) in the status line of the CID.The system is active for about 5 seconds. If no input takes place during this period of time, the user is informed that no voice input was detected and the request for voice input is repeated. The voice control system is deactivated if again no input is made within 5 seconds. 9 Car Communication Computer Workshop Exercise - CCC Disassembly With the Instructor's assistance , remove and disassemble the CCC mockup using the Antistatic Mat 1. Remove CCC face plate 2. Remove housing top plate and Tuner Module (on RH side) 3. Remove CD-ROM drive and disconnect harness (shown on the right) 4. T urn CCC upside down and remove bottom cover plate 5. Remove HIP module - slide upwards and disconnect harness (shown on the right) 6. Release single screw and remove the gyro sensor (shown on the right) 7. Remove the Main Board surface screws - disconnect top ribbon cables (3) - disconnect bottom ribbon cables (2) - release fiber optic connector from rear main plug block (in housing) - remove main board (shown on the right) 8. Remove DVD drive from the front (shown on the right) 9. Remove Audio Board (shown on the right) 10. Remove the power board by sliding it out of the housing (shown on the right) 10 Car Communication Computer