TV tuner (analog/digital), component description - GF82.60-P-3106FQ

MODEL 218 with CODE (863) Digital/analog TV tuner 

Illustrated on model 218.3 

Location 

The TV tuner (analog/digital) is located in the trunk on the right rear in front of the wheel well cutout behind the side wall lining on a bracket.

Task 

The TV tuner (analog/digital) performs the following tasks:

• Receive signals 
• Demodulating and decoding signals 
• Transmit signals 

Receive signals 

The input factors are read in via the following connections:

• Media Oriented System Transport (MOST) 
• Direct lines 

Media Oriented System Transport (MOST) 

The TV tuner (analog/digital) receives control signals over MOST from the COMAND controller unit (A40/3).

Direct lines 

The following signals are read in by the TV tuner (analog/digital):

• Power supply through circuit 31 and circuit 30g
• Wake-up signal from COMAND controller unit
• TV radio signals from:
  • TV 1 antenna amplifier (A94/1) over a coaxial cable
  • TV 2 antenna amplifier (A94/2) over a coaxial cable
  • TV 3 antenna amplifier (A94/3) over a coaxial cable

Demodulating and decoding signals 

The TV signals that are received via the antenna amplifier are evaluated internally and separated into video and audio signals.

Transmit signals 

The initial parameters are transmitted over the following connections:

• MOST 
• Direct line 

MOST 

The TV tuner (analog/digital) sends audio signals to the COMAND controller unit or to the sound system amplifier control unit (N40/3) (with code (810) Sound system or code (811) Advanced sound system).

Direct line 

The TV tuner (analog/digital) sends video signals over Y/C lines to the COMAND controller unit.

Apart from this, the following components are supplied with a phantom voltage:

• TV 1 antenna amplifier
• TV 2 antenna amplifier
• TV 3 antenna amplifier

Technical data Designation	Unit	Values	Tolerance range	Remarks
TV tuner (analog/digital)
Power supply	V	14		Battery voltage UB
Voltage limits	V	9		Minimum UBmin
		16		Maximum UBmax
Power consumption	A	< 1.9		Rated power consumption IBmax
	A	< 1.9		Action IAction (Standby=Operation)
	mA	1		Quiescent current I0
Reverse polarity protection				YES
Additional specific parameters	MHz	90 - 108		TV band 1
TV reception frequencies (analog and digital)	MHz	170 - 222		TV band 3
	MHz	470 - 770		TV band 4/5
Minimum voltage	V	≤9	±0.2	Minimum UBmin If the voltage drops below the minimum value (UBmin ), all data in the volatile memories is lost.
Special features				The IS-tester can access the TV tuner (analog/digital) diagnosis over the electronic ignition lock control unit (N73), interior CAN (CAN B), COMAND controller unit and the MOST. The following service functions are supported: Control unit identification Fault management Read fault list Read freeze frame data of a fault Delete fault codes Wiring test of TV antenna amplifier and audio/video lines for short circuit and connection Read current signal strength TV antenna amplifier switched on or off Read mean signal strength value - TV antenna amplifier switched on or off Antenna use (TV performs long-term observation) Test picture and test audio Programming TV parameters, i.e. National settings and audio and video lines used Read TV parameters Control module reset Write and read permanent channel list for special usage areas (workshop list)
Flash capability/coding capability				Profi-compatible flashable/SCN coding

Wiring diagram for TV tuner

A90/1

PE82.60-P-2220-97XAA