Tuner Unit, Component Description - GF82.60-P-5015FH
Model 238
Up To Model Year 2021
With Code 522 (Audio 20 radio)
With Code 536 (Sirius satellite radio complete system)
Model 238
Up To Model Year 2021
With Code 522 (Audio 20 radio)
With Code 537 (DAB digital radio standard (Digital Audio Broadcast))
Shown On Model 238.3
Location
The tuner unit is located at the front end of the trunk recess on a bracket:
- In model 238.3, at the front end of the trunk recess
- In model 238.4, on the control unit carrier in the center of the trunk recess
Tasks
- Receive signals
- Processing signals
- Transmitting signals
Receive signals
- Media Oriented System Transport (MOST)
- Direct lines
Media Oriented System Transport (MOST)
The tuner unit is a MOST participant and it communicates over this with the head unit (A26/17).
Direct lines
The tuner unit receives the following signals via direct lines:
- Power supply via circuit 31 and circuit 30t
- Electronic wake-up for MOST
- SDAR antenna (A2/105) (with code 536 (SIRIUS satellite radio))
- TV 1 antenna amplifier (A94/5), for DAB-Band-III signals (DAB 1) (with code 537 (Digital radio (DAB)))
- TV 2, DAB and TV antenna amplifier (A2/108), for DAB-Band-III signals (DAB 2) (with code 537 (Digital radio (DAB)))
Processing signals
- With CODE 536 (SIRIUS satellite radio) the tuner unit decodes and amplifies the satellite signals (Time For Division Multiplex (TDM)) and the terrestrial signals (Coded Orthogonal Frequency Division Multiplex (COFDM)) into PCM signals (Pulse Code Modulation).
- With CODE 537 (Digital radio (DAB)), the tuner unit decodes the DAB band III signals into PCM signals.
Transmitting signals
- MOST
- Direct lines
MOST
The tuner unit is a MOST participant and it communicates over this with the head unit. The audio signals are transmitted to one of the following components:
- Sound system amplifier control unit (N40/3) (with code 810 (Sound system))
- Head unit (except CODE 810 (Sound system))
Direct lines
The tuner unit transmits the following signals via the signal lines:
- Supply voltage to the TV 1 antenna amplifier (with code 537 (Digital radio (DAB)))
- Supply voltage to the FM 2, DAB and TV antenna amplifier (with code 537 (Digital radio (DAB)))
| Wiring diagram for tuner unit control unit | PE82.60-P-2108-97DCA |