Discovery electrical Manual - part 38

RADIO (EXCEPT NAS) (HIGH LINE)

E6

11

CIRCUIT DIAGRAM

X235
Radio Volume Up
Switch

0

X234
Radio Wave-
band Switch

0

[1]

[1]

Except NAS

High Line Radio

C2057

B

S217

E201

E201

0

[1]

Z111
Radio

Z234
Radio Volume
Resistor

Z236
Radio Waveband
Resistor

X236
Radio Volume
Down Switch

X233
Radio Tune
Switch

3

2

5

1

4

1

2

4

5

2

1

5

4

Interior Lamps

C230

C2058

C2058

C2057

C2056

C2056

0

[1]

C2097

1

2

4

5

C2059

Interior Lamps

See Ground Dis-
tribution

Interior Lamps

See Ground Dis-
tribution

See Ground Dis-
tribution

U

RN

NY

B

B

RG

B

B

B

RN

UG

NY

B

B

U

RN

S277

S277

RN

E201

UG

Z235
Radio Tune Re-
sistor

RADIO (EXCEPT NAS) (HIGH LINE)

E6

12

CIRCUIT DIAGRAM

F 3

10 A

5

C437

P126
Fascia Fuse Box

See Fuse Details

1

C229

4

5

Z111
Radio

6

S272

3

C2061

3

2

6

E401

See Ground Dis-
tribution

C413

+

–

+

–

C412

6

PY

B

E6-9

E201

1

11

9

10

C2055

1

3

2

C212

1

3

2

C437

C412

See Ground Dis-
tribution

R

B

SCR

Z199
Subwoofer Am-
plifier Shield

K146
Subwoofer

Except NAS

S418

High Line Radio

B

 

X

Z176
Subwoofer Am-
plifier

LGO

B

BW

B

BW

S334

RADIO (NAS)

E7

CIRCUIT OPERATION

1

CIRCUIT OPERATION

The audio system consists of a new head unit
connected to a Radio Tune Switch, a waveband
switch, a volume up and a volume down switch
which are located on the fascia next to the
Instrument Cluster. The system is also equipped with
an amplifier, a subwoofer, a subwoofer amplifier and
a CD changer which is connected to the Radio with a
DIN cable. The amplifier is connected to power via a
Power Amplifier Relay which is energised with
ignition on.

The control head is equipped with an anti–theft
feature which makes the unit inoperative once
battery power is removed. A security code must be
entered to restore power to the unit. The system is
equipped with two rear and four front speakers.

Battery voltage is provided to the control head at all
times through the P wire. In addition to monitoring
the anti–theft feature, this input keeps the preset
station memory alive. Whenever battery power to the
unit is lost, the anti–theft code must be entered and
the preset stations reprogrammed.

When the Radio (Z111) and the ignition are turned
on, the voltage signal through the LGO wire and the
control head wakes up the unit. The Radio (Z111)
plays, the VF display comes on, and the control unit
buttons illuminate. The VF display is dimmed when
the headlights or park lights are turned on. When the
lights are on, voltage from fuse F8 of the Fascia
Fusebox (P126) is applied to the Radio (Z111)
terminal 6, Connector 230 signalling the Radio
(Z111) to dim the display.

Side Screen Antenna

The antenna is now printed into the rear side screen
on four door models. For America and Japan the
element is fitted in both rear side screens, known as
diversity antenna system. Other markets have a
single element in the right hand side screen only.
Diversity reception means that if vehicle movement
results in a loss of signal due to reflections from
buildings (known as multipath distortion), the radio
will switch to the antenna receiving the strongest
signal. This results in less interference and better
stereo performance.

 Antenna Amplifier

New antenna amplifiers are located behind the
headlining above the side screen antenna(s). Right

hand side fitment is an FM + AM amplifier, left hand
side, diversity, is an FM only amplifier.

 Subwoofer

The subwoofer unit is located in the right hand side
of the luggage compartment. It amplifies frequencies
between 20 and 150 Hz to give an enhanced bass
sound.

 Subwoofer Amplifier

The amplifier is fitted on top of the subwoofer unit.

RADIO (NAS)

E7

2

CIRCUIT DIAGRAM

S2061

4

C230

E201

30

F 6

20 A

P

P128
Satellite Fuse
Box 2

6

RN

7

X

F 3

10 A

P126
Fascia Fuse Box

C229

1

See Fuse Details

Interior Lamps

C209

13

LGO

8

C2055

10

C2029

6

See Ground Dis-
tribution

5

C2055

12

UY

C230

PY

C212

13

Z111
Radio

S272

A

E7-7

E7-9

B

5

C268

B

S2065

SCR

B

LGO

NAS

See Fuse Details

See Ground Dis-
tribution