BMW E90 Manual page 11

Legend for HiFi System Circuit Diagram
Index
1
'Professional' radio (RAD 2)
4
Instrument cluster
5
Junction box control unit
6
Dynamic stability control
7
Steering column switch cluster
8
FM1, FM2 and FM3 aerials
9
10
Antenna amplifier with diversity module
11
Tweeter, front right
12
Mid-range speaker, front right
13
Central base speaker, right
15
Mid-range speaker, rear right
KL
Control signal or power supply
Rad_on
Explanation
AM aerial
Index
16
Tweeter, rear right
17
18
19
Mid-range speaker, rear left
21
Central base speaker, left
23
Mid-range speaker, front left
24
MOST
Media Orientated System Transport
HF
High frequency signal
ZF
Intermediate frequency signal
Changeover voltage, AM/FM
Us
antenna diversity mode
Audio input for additional
Aux_In
Tel_
Radio muting during telephone operation
Mute
Explanation
HIFi Amplifier
Tweeter, rear left
Tweeter, front left
audio sources
E90 Communication
11