Great Wall service chassis and body Manual - part 83

BE-61

Acoustical equipment system

The devices in this series is the vehicle-equipped acoustical receiver and recorder whose function is realized through

the electronic tuner and CD recorder, therefore, it can receive the amplitude modulation, frequency modulation and

stereo broadcast and can record the CD disc, what??s more, it is with the advanced electric anti-quaking, strong capability

of error correction, fashionable blue LCD liquid crystal digital display, and four-way power output. The device in this

series also has the characteristics such as low distortion, large output power and good performance of anti-interference,

broad frequency range and sweet sound, etc.

Diagram of Acoustical equipment system

 SF

fuse

ignition switch

ACC ON

ST

side-window aerial

CD device

loudspeaker

ignition switch

CD plugging element

plugging elements of rear

loudspeaker of CD device

1

2

3

4

5

6

7

8

9

10

1

2

3

4

5

6

7

8

9

1

2

3

4

5

5

4

1

2

3

5

3

8

4

9

7

5

6

1

7

Note: For Dr the antenna is the rod type.

battery

cigarette lighter

left front

right front

left rear

right rear

from small lamp relay

2

amplifier

Body Electric System

 Acoustical Equipment System

BE-62

Diagram of acoustical equipment system (continued)

SL SK

SY SJ

fuse

ignition switch

ACC ON ST

4

1

small lamp

large lamp

6

6

2

5

9 P Q 8 1 3 O 5 7

receiver

receiver

1

2

3

4

5

6

7

8

9

1

2

3

4

5

4

3

2

1

5

6

7

8

ignition switch

combined switch

8

7

6

5

16

15

14

NP

12

11

4

3

2

1

9

10

fuse

ignition switch

ACC ON ST

4

1

small lamp

large lamp

6

1

6

2

5

9 3 4 8 1 3 2 5 7

CD device

CD device

1

2

3

4

5

6

7

U

9

1

2

3

4

5

ignition switch

4

3

2

1

R

6

8

combined switch

8

7

6

5

16

NR

14

13

12

11

10

9

2

3

4

N

receiver

small lamp relay

small lamp relay

electric aerial

CD device

battery

battery

fuse

fuse

7

Body Electric System

 Acoustical Equipment System

BE-63

Trouble

Possible causes

Repairing approaches

Page

Receiver

CD recorder

Lack of power supply

Burned out fuse

Wiring failure

Change the fuse and check whether there is

short circuit;

Make reparation as required

Loudspeaker doesn

t work Faalure of loudspeaker

Wiring failure

Chaange the loudspeaker;

Make reparation as required.

Do not read the tape or disc

Receiver failure or

Change the receiver or CD recorder

CD recorder failure

AM or FM doesn

t work

Receiver or CD recorder failure

Change the receiver or CD recorder

VCD

Non-opening of devices

Aerial failure

Wiring failure

Main machine failure

Change or repair it as required;

Make reparation as required.

Change the main device

Neither image nor sound is

broadcasted

Failure of main device;

converter box failure plus disc box

failure

Make inspection as required and change

the parts with failure

No image when backing up

Wiring failure

Failure of video camera

Conduct an inspection as required and

change the parts with failure

FM/TV failure

Failure of aerial amplifier

Weak signal from TV station

Make an inspection as required and change

the parts with failure

Screen cannot be turned over Unsuitable main device adjustment

Failure of main device

Adjust according to the application

instruction;change the main device

Disc box cannot be pushed

Failure of disc box

Make an inspection as required

outside

Bass speaker doesn

t work Wiring failure

Failure of bass speaker

Make reparation as required.

Change the bass speaker.

Electric

aerial

Non-raising when receiver is

opened

Wiring failure

Failure of electric aerial

Make reparation as required.

Change the electric aerial

Falling seize-up

Wiring failure

Failure of electric aerial.

Make an inspection as required and change

the parts with failure.

BE-64

BE-64

BE-64

BE-65

BE-65

Inspection on Common Trouble

Body Electric System

 Acoustical Equipment System

BE-64

Inspection on Common Trouble

k

v

k

k

v

ON

OFF

blue screen

black screen

(a)

Main engine cannot be opened

Ther is no action when pressing

the 

ower
key repeatedly

Check whether the voltage of

ACC and storage cell reaches

12 V

Check the fuse in power wire

or the power supply of the

entire vehicle

Failure of main

engine

(b)

No voice or image when broadcasting

NO CDC
displayed on

screen

Re-open the device

Check whether there is image

when backing up

Failure of main

engine

Be normal after

returning

Check the converter box works

normally (whether the lamp is

light or not)

Failure of converter

box

Failure of disc box

(c)

There is no image when backing up

There is no image in

video camera

Whether the screen display

is blue screen

Failure of video

camera

The backing up wire is not connected

well; reconnect it to the positive polar

of 12V of reverse gear

Body Electric System

 Acoustical Equipment System