184002177 - E3570 BUILT-IN RADIO PHONE - OPERATIONAL DESCRIPTION

The integrated radio-phone-navigation system P20 is supplied directly (pin 7 of connector A) from the battery via a line protected by fuse F39 of underfacia control unit B2.The integrated radio-phone-navigation system P20 is supplied by the igntion-operated line (INT) (pin 4 of connector A) via a line protected by fuse F49 of underfacia control unit B2.Pins 1 and 3 of connector A receive the CAN line by which radio P20 is connected to Body Computer M1 and the other system nodes. Pin 8 of connector A is earthed.The GSM aerial is connected to the phone function by means of a coaxial cable different from the radio cable and the navigation cable (GPS).Signals leave connetor B of P20 carrying signals to the speakers used for the handsfree function    See E3510 RADIOPins 9 and 18 of connector F of P20 are connected to microphone P26; pin 12 of connector D is connected to earth.The external phone receiver P27 is connected to connector F of P20 at pins6, 7, 8, 16 and 17 and supplied via the line of fuse 39 of underfacia control unit B2.