Rear entertainment, TV reception, function - GF82.90-P-1003LEA
MODEL 221 with CODE (864) Rear entertainment system with CODE (863) Digital/analog TV tuner as of model year 2010/YoM 09 model refinement package
Function requirements, general
- Telematics CAN (CAN A) active
- Rear entertainment system is switched on
Rear entertainment, TV reception, general
The TV picture and the interface are generated by the left rear display (A40/5) or right rear display (A40/6) when the "TV" menu in the application bar is selected and shown on the screen of the particular display.
The TV reception function is operated using the remote control.
The control signals are transmitted to the following components via infrared (IR) interfaces:
- SPLITVIEW display (A40/10) (with code (867) SPLITVIEW)
- Left rear display
- Right rear display
When the TV application is started, the TV picture appears on the rear display in full-screen mode. A control menu displaying the station currently selected appears in the status bar of the rear display.
Irrespective of the settings on the COMAND controller unit (A40/3), the analog and digital TV stations that can currently be received can be selected for the rear display.
Function sequence for TV reception
The TV combination tuner (analog/digital) (A90/1) receives TV signals from TV antennas 1 to 4 in the rear window over the following route:
- Direct lines
- Rear window antenna amplifier module (A2/12)
- Direct lines
The TV combination tuner evaluates the TV signals and transmits the analog audio signals via a stereo line and the analog picture signals via a Y-brightness (luminance)/C-color information (chrominance) (Y/C) line to the DVD player (A40/4). The DVD player forwards the analog audio signals via a stereo line and the analog picture signals via a Y/C line to the rear display. The interface is displayed on the screen of the rear display.
The TV channel is selected using the corresponding remote control. The control signals from the remote control are transmitted to the rear display via the IR interface on the remote control. The rear display forwards the signals to the TV combination tuner via the telematics CAN. The TV combination tuner evaluates these signals and transmits analog audio signals over a stereo line and analog picture signals via a Y/C line to the DVD player.
The DVD player forwards the analog audio signals via a stereo line and the analog picture signals via a Y/C line to the rear display. On receiving the analog picture signals of the TV channel from the TV combination tuner, the rear display generates the digital picture signals for displaying on the screen. The analog audio signals for the TV station are converted in the rear display and sent over the IR interface (up to 31.8.10) or wifi interface (as of 1.9.10) of the rear display to the IR interface or the wifi interface of the headphones (cordless). The volume is controlled by means of the volume control integrated in the headphones.
Alternatively, it is possible to output the audio signals over the vehicle's speaker system.
The audio signals are output at the volume set at the COMAND controller unit. The volume setting is sent by the COMAND controller unit over the Media Oriented System Transport (MOST) to the audio tuner control unit (N93/1) or the digital sound processor (A2/69) (as of 1.9.10 with code (811) Advanced Sound System).
The audio signals of the TV combination tuner (analog/digital) are transmitted via the DVD player directly to the audio tuner control unit.
The audio signals are emitted on vehicles with code (810) Sound system at the following speakers:
- Left rear door speaker group (H4/3)
- Right rear door speaker group (H4/4)
- Bass module speaker (H4/17)
- Center cockpit speaker (centerfill) (H4/27)
- Left rear surround speaker (H4/54)
- Right rear surround speaker (H4/57)
- Left front door Sound tweeter (H4/68)
- Right front door Sound tweeter (H4/69)
- Left front door Sound woofer and midrange speaker group (H4/72)
- Right front door Sound woofer and midrange speaker group (H4/73)
For vehicles with code (811) Advanced Sound system, audio is emitted over the following speakers:
- Speaker Left front door (H4/5)
- Right front door speaker (H4/6)
- Bass module speaker
- Center cockpit speaker (centerfill)
- Left front door tweeter (H4/33)
- Right front door tweeter (H4/34)
- Left rear door tweeter (H4/35)
- Right rear door tweeter (H4/36)
- Left rear surround speaker
- Right rear surround speaker
- Left front door woofer (H4/64)
- Right front door woofer (H4/65)
- Left rear door woofer (H4/66)
- Right rear door woofer (H4/67)
The woofer and bass box speaker are actuated by the sound amplifier (A2/13), which is regulated by the digital sound processor.
| Electrical function schematic for rear entertainment TV reception | PE82.90-P-2053-97SAB | ||
| Digital sound processor, component description | A2/69 As of YoM 10 with code (811) Advanced Sound System |
GF82.62-P-5011LE | |
| Component description for COMAND controller unit | A40/3 With code (526) COMAND with single DVD drive (without navigation) or with code (527) COMAND APS with single DVD drive (with navigation) |
GF82.85-P-3136LE | |
| Component description for rear entertainment DVD player | A40/4 | GF82.90-P-4009LE | |
| Component description for rear display left/right | A40/5, A40/6 | GF82.90-P-4020LEA | |
| COMAND display, component description | A40/8 Without code (867) SPLITVIEW |
GF54.30-P-6110LE | |
| SPLITVIEW display, component description | A40/10 With code (867) SPLITVIEW |
GF54.30-P-6120LE | |
| TV combination tuner (analog/digital), component description | A90/1 | GF82.90-P-4019LE | |
| Audio tuner control unit, component description | N93/1 | GF82.62-P-3132LES |