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Local Service Organization Service Manual
C 3 5 S e r i i e s
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Table of Content
Language Groups
32
CHAPTER 1
Cellular Communication
Coverage Concept
Customer Specific Initialization
34
International Mobile Equipment Identity
34
1
Phone Unblocking
35
GSM Network Architecture
2
Subscriber Identity Module
3
CHAPTER 3
Siemens Service Equipment
Introduction
SIM Application Toolkit
4
Extended GSM 900 - EGSM
5
37
Built-in Modem
5
Other equipment
39
Data Application
6
Software Installation
40
Configuring the test software
41
CHAPTER 2
Level 2 Service Guide
Running the test sequence
42
ANNEX A
46
Introduction
7
ANNEX B
49
C35 Series Technical Information
8
Accessories
10
CHAPTER 4
Level 2.5 Repair Document
Introduction
General Information
11
C35 Series Exploded Diagram
13
50
Mechanical Concept
14
Antenna Connector
51
Hardware Concept – Block diagram
15
Ringer
55
Hardware Description
16
Bottom Connector (Lumberg)
58
Power Supply Concept
18
Display Connector
62
Over voltage Condition
18
Keyboard LED
66
Battery
19
Display LED
69
Short Circuit Protection
19
Infrared Diodes
73
Charging 19
Deep Discharge Battery 20
C35 Spare Parts Level 2 21
Disassemble the C35 22
Disassemble/Assemble Lower Housing 24
Disassemble/Assemble Control Board Assy 25
Disassemble/Assemble Upper Housing
ANNEX C
PC Adapter Cable & Accessories C35
76
Power Plug for C35
77
Car installation Ratio Unit, C35
78
Car Installation kit Handfree kit
79
27
Car Installation kit Handfree Pro.
80
Assemble the C35
28
Car Installation Comfort GPS, C35
81
Mobile Software Programming
30
References
83
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Cellular Communication
Coverage Concept .
he cellular systems is made up of numerous transmitting and
receiving sites, whose individual coverage areas partially overlap. The
concept of frequency re-use, same frequency is used by several sites,
allows a high traffic density in a wide area. Due to the limited
transmission range of the terminals, cellular systems are based on a large
number of base stations on the infrastructure side, scattered over the area to
cover, with each covering a fairly small geographical zone called cell. Cells are
often represented by hexagons (see figure 1.1.).
FIGURE 1.1 CELLULAR COVERAGE REPRESENTATION.
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GSM Network Architecture.
GSM network can be broadly divided into three broad parts, namely:
1. Mobile Station(MS) carried by the subscriber,
2. Base Station Sub-system(BSS) which controls the radio link with the mobile station.
3. Mobile Switching Center(MSC) which performs the switching of calls between the mobile
users, and between mobile and fixed network users.
FIGURE 1.2 GSM ARCHITECTURE
Each mobile station is given a unique identity. As soon as the mobile phone is turned on, it
registers with the network and is authenticated, as such the network could always find the
mobile phone.
Larger amount of data is being exchanged to and from the following functional blocks in the
MSC:
Visitor Location Register, VLR
Stores information about mobile subscribers that enter it coverage area which is associated with
the geographical area where the mobile is currently roaming. When there is an incoming call for
the mobile, the HLR is interrogated about the present address of the VLR.
Home Location Register, HLR
A database that contains all data concerning the subscription of the mobile subscriber, i.e. their
access capabilities, subscribed services, and supplementary services. It also contains
information about the VLR that is handling the mobile station currently. When the mobile
changes location, the HLR is updated accordingly. It also provides the MSC with information
about the MSC area where the mobile is actually located to allow incoming calls to be routed
immediately to the called party.
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Authentication Center, AUC
Stored information that is necessary to protect communication through the air interface against
any intrusions. The legitimacy of the subscriber is established through authentication and
ciphering, which protects the user information against unwanted disclosure.
Equipment Identity Register, EIR
An option the network operator can use to enforce security. With this feature the network can
identify defective or stolen mobile that may not be used in the network.
Subscriber Identity Module(SIM)
SIM is a smart card which has a computer and memory chip that is permanently installed in the
mobile equipment. It comes in either the size of a credit card or smaller version known as the
plug-in SIM.
The subscriber information, which includes a unique number called the International Mobile
Subscriber Identity (IMSI) is stored in the SIM card. SIM card identifies the subscriber to the
network.
FIGURE 1.3 INSERT SIM CARD
Figure 1.3 illustrates the steps for inserting the SIM card into the C35 series.
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