On-board monitor

The top navigation on-board monitor (BM) is the control unit (with cassette drive) and display for following components:

• Video module
  
• Navigation computer
  
• Radio
  
• CD changer
  
• On-board computer functions
  

The functions are operated and displayed on the monitor from the on-board monitor control panel.

The system users are interlinked via the K-bus. Operation of push buttons and incremental transducers (radio rotary knob and BM rotary knob) is transferred via the K-bus to the individual components. The cassette stage is controlled by the radio via the K-bus.

The graphics stage (navigation computer) creates the images from the K-bus information of the individual control units and transfers them via the RGB interface to the display.

LC Display

The monitor temperature is measured by a temperature sensor. If the overtemperature threshold is exceeded, the monitor is switched off and is not reactivated before it has cooled down.

Radio LED

The radio LED is controlled by the radio via the K-bus and indicates the radio ON/OFF status.

Incremental transducer

The radio rotary knob serves the purpose of setting the volume for all devices incorporated in the top navigation system.

The menus of the interlink system are served with the BM rotary knob.

Service Mode

• Select "setting" with rotary knob in main menu and confirm by pressing the rotary knob.
  
• Now press and hold the "menu" button until the "service mode" menu appears.
  
• Select and confirm "on-board monitor" in the "service mode" menu with the rotary knob.
  
• Select "on-board monitor" functions in the menu and confirm.
  
• Select and confirm button functions.
  
  

The following displays now appear for:

• Button
  
• BM incremental transducer
  
• Radio incremental transducer
  
  

Button test

"FF" appears in the button display as long as no button is pressed

All buttons can now be checked. During this check, the display changes from "FF" for no button pressed to 01 to 25 depending on what button is pressed.

The button test is terminated automatically if no button is detected as being pressed for a longer period of time.

Rotary knob test

Test for BM rotary knob and radio rotary knob

"00" appears in the corresponding display as long as no rotary knob is operated

The display changes from "00" to "01", "02", "03" etc. by slowly turning the knob in anticlockwise direction.

The display changes from "00" to "FF", "FE", "FD" etc. by slowly turning the knob in clockwise direction.