Geely Emgrand X7. Manual part — 508

11.3 Navigation

11.3.1 Specification

11.3.1.1 Fastener specifications

Torque range

Fastener name

Model

Metric

(N.m)

English system

(lb-ft)

Q2205516

4 - 6

3 - 4.4

Bolt of navigation head unit

Q1460620

5 - 8

3.7 - 6

GPS antenna self tapping screw

ST4 . 2×16

3 - 4

2 - 3

Front door high-pitch speaker self

tapping screw

ST4.2×9.5

3 - 4

2 - 3

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11.3.2 Description and operation

11.3.2.1 Overview

The on-board navigation system consists of a GPS receiver, a self-disciplined navigation device, a
vehicle speed sensor, a gyro sensor, an LCD display, etc. GPS is the abbreviation of the term
"Global Positioning System", which is developed by the United States for military purpose.

Sending.Its meaning is that the navigation satellite is used for measuring time and distance to form
the global navigation system.

The navigation system of this vehicle has an advanced design: the navigation screen, navigation
ECU and radio are integrated as a whole. Map database adopts a SD card storage technology; the
previous map database is reserved in the mode of compact disc (CD); compared with the map CD,
the data is read quickly in the storage mode of SD card; moreover, the map CD player is reduced,
so that the structure is simple; therefore, the fault probability is also greatly reduced. When new
navigate map database needs to be updated, the computer only needs to update the data in the SD
card. If you need to upgradae the map database when you only have a traditional map disc, you
must replace with a new disc.

SX718Navigation SD card capacity is 4G.

The on-board navigation system mainly provides the following functions:

–

Best route search of destination;

–

Have instant and search function

–

Provided rich menus and record function with searcher

–

Provide real-time voice prompt during proper time;

– Extended

function.

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11.3.2.2 GPS system introduction

A GPS mainly consists of three parts: space equipment, ground control and user terminals.

Space segment:

Including 21 satellites and 3 backup satellites, which as a whole seem like a constellation hanging
20,000km high above the ground.Uniformly distribute in 6 orbital planes at the orbital angle of
55°, wherein the angle between the orbital planes is 60°, 4 satellites are distributed in each orbit;
thus, such distribution structure ensure that more than 4 satellites can be seen at any place of the
global.

1

6

8

17

20

21

15

5

10

11

9

14

7

2

4

13

16

18

12

19

NL11-2019b

Ground control section:

For navigation positioning, firstly, the position of the satellite must be known. However, the
position of the satellite is obtained based on the calculation of the movement of the satellite and its
orbital parameters. Ground monitoring station constantly observes each satellite all the year round.
According to the satellite state parameter observed, regulate the satellite to the preset orbit timely
and amend the pose of the satellite. When certain satellite faults, a standby satellite can further be
dispatched instead of the invalid one.

User receiving system:

The user receiving system includes hardware, such as a power supply, an antenna, a receiver, a
microprocessor, control display device and the like, as well as other built-in software and data
processing software package etc.

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11.3.2.3 Extended function introduction

1. Radio

function

The same as the common radio, the system has a radio function. The radio station can be stored by
storing the list. After disconnecting the battery negative cable, radio station information in a
memory list shall be reset completely.

2. SD

function

Notes:

This system supports the function of using a SD card for its intended purpose: an MP3/WMA file
can be played only when it is copied onto another SD card not storing map files if it is copied onto
a SD card containing map files and the system cannot recognize the corresponding audio file.

This system supports playing audio files of such formats as MP3, WMA. After the SD card
equipped with the MP3/WMA format file is inserted, the [SD] key system is pressed to start
playing audio files in the SD card, and the display shows the SD state, including the information,
such as "track name", "singer information" and "playback progress bar", etc.

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