Siemens A50, C45, M50, MT50 Service Manual

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Our innovation shapes the future

Local Service Organization Service Manual

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Table of Content

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C H A P T E R 1
Cellular Communication
Coverage Concept 1
GSM Network Architecture 2
Subscriber Identity Module 3
SIM Application Toolkit 4
Extended GSM 900 - EGSM 4
Built-in Modem 5
Data Application 5
WAP 6

C H A P T E R 2
Level 2 Service Guide
Introduction 7
General Information 7
Different between C45 and 2118 7
C45 Series Technical Information 8
Accessories 10
C45 Series Mechanical Diagram 12
Mechanical Concept 13
Hardware Concept – Block diagram 14
Hardware Description 15

C45 Spare Parts Level 1 & Level 2 17
Disassemble the C45 18
Disassemble/Assemble Control Board Assy 21
Assemble the C45 22
Mobile Software Programming 25
Customer Specific Initialization 27
International Mobile Equipment Identity 27
Phone Unblocking 28

C H A P T E R 3
Siemens Service Equipment
Introduction 30
Other equipment 31
Software Installation 33
Configuring the test software 34
Running the test sequence 35
ANNEX A – Test SIM Information 39
ANNEX B – Service Equipment List 40

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References 40

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Chapter

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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.

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.

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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.

To protect the SIM card from improper use, a security feature, a four digits personal identification
number (PIN), is built in. The PIN is stored in the SIM card and can be changed by the
subscriber. PIN2 is required for additional functions available with a special SIM card (Consult the
operator for more information about the PIN 2).

A code (PUK) is provided for unlocking the SIM card if the SIM card is blocked

.

7

SIM Application Toolkit

This is a new GSM feature that has been integrated into the GSM standards in Release 96, with
further enhancements added as part of the Release 97 feature set. This feature came about
because of a desire by Network Operators to offer differentiated services, without the need for the
Mobile Manufacturers having to build different variant for different customers. The unique service
offered by the Operator is placed as an application on the SIM and that could work on any mobile
that supports the Toolkit feature.

There is a distinct set of commands between the mobile and the SIM specifically for the Toolkit
that allows the SIM Toolkit and the mobile to communicate independently of the GSM
communication between the SIM and the mobile. Henceforth, the SIM Application Toolkit and
GSM functionality on the SIM are separated logically. The Toolkit can interact directly with the
mobile itself and adding itself to the mobile menu.

Currently, Toolkit application on the SIM and its “other half” communicate by using the Short

Message Service(SMS). “Proactive SIM” is a mechanism whereby the SIM can initiate actions to

be taken by the mobile. These actions include:

 Display text from the SIM on the Mobile display
 Send short message
 Set up a voice call to a number held by the SIM
 Set up a data call to a number and bearer capabilities held by the SIM
 Send a Supplementary Service (SS) control or Unstructured Supplementary Services Data

(USSD) string

 Play a tone in the mobile’s ear piece or ringer
 Initiate a dialogue with the user
 Provide local information from the mobile to the SIM.
 Data download to the SIM from network
 Call control by the SIM.

SIM Applications Toolkit (SAT) allows the flexibility to update the SIM, to change the services and
download new services over the air. In the SAT specification, the short message service is a key
mechanism for personalizing the SIM in each user’s GSM phone. It is designed as a client-server
application. C45 series supports SAT Class 3 specification.

When active, the name of the service may appear in the menu, and there will be sub-menu if
more than one application is active. Figure 1.4 is the SAT icon.

FIGURE 1.4 SAT ICON

Extended GSM 900, E-GSM

This is a new standard that allows Network Operators to increase their capacity through an
extended frequency. The frequency range of E-GSM is as follows:

 Mobile Transmit: 880,2 - 914,8 MHz
 Mobile Receive: 925,2 - 959,8 MHz

C45/2118 series is a GSM Phase 2 / Phase 2+ Dualband E-GSM / GSM 1800 mobile phone.

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Built-in Modem.

C45/2118 has an integrated modem for data communication with a PC using the data cable as
shown in Figure 1.5.

FIGURE 1.5 DATA CABLE

Data Application Support

Modem driver conforms to V.25 command set, and transmission speed conforms ITU-T-standard
of V.22bis. (2400, 4800,and 9600 bits/sec).

Facsimile conforms to Service Class, group 3 and operate at 2400, 4800, 7200 and 9600 bit/s.
Data services via GSM network up to 9600 kbps, and remote control using cellular AT

commands.

Following are some of the link to the information regarding data application of mobile
phone and computing devices - under MySiemens web page International>Mobile
World>S25>Product World>Tips & Hints.

http://www.ic.siemens.com/mysiemens
To use the phone data/fax modem, you need a SIM that subscribe to GSM Data/Fax

service or Mobile Office service. The C45 need to be connected to the PC using the data
cable. The PC has to install with a Windows standard 19200bps modem driver.

Once the modem driver was installed, to use the phone data modem for Internet, just
select MyComputer> Dial Up Networking>ISP Connection. Right click the ISP connection
to select Properties>Modem> 19200bps Modem.

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Wireless Application Environment (WAE)

Wireless Session Protocol (WSP)

Wireless Transaction Protocol (WTP)

Wireless Transport Layer Security (WTLS)

Wireless Datagram Protocol (WDP)

Bearers e.g. Data, SMS, USSD

Wireless Application Protocol, WAP.

Wireless Application Protocol takes a client-server approach that uses the in-built micro-browser
to make a request, in wireless markup language (WML), for information or service. The request is
passed to a WAP Gateway, which then retrieves the information from a Internet server, in HTML
format, and translate it into WML. The requested information is then sent to from the WAP
Gateway to WAP client (mobile) using the available and most appropriate mobile network bearer
services.

Wireless Protocol Stack.

TABLE 1..1 WAP PROTOCOL STACK

1. Wireless Application Environment

Defines the user interface on the phone. WAE contains the WML,WML script and the
wireless telephony application (WTA).

2. Wireless Session Protocol

Link the WAE to two session services – one connection oriented operating above the WTP
and a connectionless service operating above WDP.

3. Wireless Transaction Protocol

Runs on top of the datagram service and part of the standard suite of TCP/IP protocols, to
provide a simplified protocol suitable for low bandwidth mobile station.

4. Wireless Transport Layer Security

WTLS incorporates security features that are based upon the established Transport layer
Security (TLS) protocol standard, that include data integrity checks, privacy on the WAP
Gateway to client leg and authentication.

5. Wireless Datagram Protocol

Allows WAP to be bearer independent by adapting the transport layer of the under-laying
bearer. WDP presents a consistent data format to the higher layer on the WAP stack.

WAP Internet access via the C45 is possible with the inclusion of Wireless Application Protocol
(WAP) browser 1.1.

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Chapter

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Level 2 Service Guide

Introduction

The chapter is intended to help you carry out repair up to Level 2 on the C45 series mobile
phone.

General Information

C45 series is a dual band (GSM 900 and GSM 1800) Siemens GSM Smart handset.
Due to different requirements of the markets, the C45 has different variants, which broadly

classified under International version and Asian version. Marketing name for international version
is C45, whereas Asian version is 2118.

The C45 and 2118 share the same phone accessories.

Difference between C45 and 2118

The differences between the C45 and 2118 are the phone hardware code and the phone
software.

2118 is a Asian variant of C45 series phone for the China, Taiwan, Hong Kong, Singapore and
Malaysia markets featuring support for English, Simplified Chinese and Traditional Chinese
language.

The repair for international version C45 and the Asian variants 2118 are identical unless
otherwise noted, therefore the description herein is confined to C45 only.

All repairs have to be carried out in an environment set up

according to ESD regulations defined in international standards.

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C45 Technical Information

System GSM Phase 2, Dual Band

EGSM 900, Class 4(2 Watt)
GSM 1800, Class 1(1 Watt)

Operating Voltage 3.6V

Size (LxWxH) 109 x 46 x 23 mm (L x W x H)
Volume 82 cm3 including battery (approx)
Weight 107g including battery (approx)
Battery 550mAH NiMH Battery (C45 Standard)
Standby time1 60 - 200 hours (standard battery)
Talk time1 100 - 300 minutes (standard battery)
Charging Time < 2 hours for 100%
SIM support Plug in card 1.8 V or 3V, SIM Application Tool Kit Class 3
Antenna Integrated
Speech codec Triple rate voice coder Enhance Full Rate/Full Rate/Half Rate

Display 5 lines, 64x101 pixels
Keypad 12 numeric keys (10 numeric, #, *)

2 function keys (Send, End-ON/OFF)

2 multifunctional softkey and 1phone book key
Key Sound Click/DTMF/None
Key Lock Activation and Deactivation by #-key or

Automatic
Dialing Last 10 outgoing calls (Redial)

Last 10 incoming with date/time stamp

Last 10 missed calls with date/time stamp

Ringer On/Beep/Off
20+4 individual melodies and 5 ringer volume settings

Speaker Volume Adjustable in 4 levels during call via softkey
Silent Alert Built-in vibrator
Phone Book Storage depends on the SIM card capacity (up to 255)

Internal phonebook of 50 entries.

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Actual time dependent on the network.

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SMS Support MT, MO, CB

Predictive Text Input, Tegic T9.
Supplementary Call Forwarding, Call Hold, Call Wait,

Services Multiparty Conference, CLIP, CLIR, AoCC
AoCI, FDN, LND USSD and SAT

Ciphering A5/1 and A5/2 supported
PIN control PIN 1 & 2 Code Control
Phone code 4 to 8 digit code
Network function Automatic and manual network selection
Chipset Infineon EGOLD+
WAP Browser Version 1.2

Other Features

 Calling Faces & Calling Symbols
 Predefined EMS sounds & pictures
 Various animations (menu, welcome)
 Silent Alert
 Various user profiles
 Text modules
 Intelligent Typing (T9) + Libraries
 Chinese menu and input (xx88)
 Alarm / Date
 Diary
 Date & Time Stamp
 50 additional phone book entries in the phone
 Built in data & fax modem (Data Services @9.6kbps, Fax @9.6kbps + Fax class 2)
 Mobile Internet Access
 Grouping SMS
 Notes

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L36104-F3090-X903

Handsfree Loudspeaker S45/ME45/C45/M45

L36145-K1310-X187

Battery NiMh C45/M45

L36145-K1310-X196

Battery NIMH C45

L36145-K1310-X216

Battery LI-ION C45

L36146-A3043-D

Phone Adapter Cable S45/ME45/C45/M45

L36146-A3061-D

Y-Adapter

L36158-A58-C35

Mounting for Car Cradle S45/ME45/C45/M45

L36254-Z6-C95

Handsfree Microphone aktiv S45/ME45/C45/M45

L36280-Z4-C354

Plug-In Power Sup C45 TAI

L36280-Z4-C355

Power Supply C45 CHN

L36880-N4001-A160

Rollup Headset with PTT dunkelblau

L36880-N4501-A101

Desk Top Charger S45, ME45, C45, M45

L36880-N4501-A102

Car-Cradle Standard S45, ME45, C45, M45

L36880-N4501-A103

Car-Cradle with Antenna Cab S45, ME45, C45, M45

L36880-N4501-A115

Soft Data Link 5.0 S45, ME45, C45, M45

L36880-N4501-A134

Car Data Adapter S45, ME45, C45, M45

L36880-N4501-A135

Push to Talk Key S45, ME45, C45, M45

L36880-N4501-A137

Multi Media Card 32 MB S45, ME45, C45, M45

L36880-N4501-A143

Desk Top Charger China S45/ME45/C45/M45

L36880-N4501-A144

Car-Cradle Standard China S45/ME45/C45/M45

L36880-N4501-A145

Data Cable China S45/ME45/C45/M45

L36880-N4501-A148

Data Cable S45/ME45/C45/M45/S25/C35/C35i/
M35/S35i/SL42/SL45

L36880-N4701-A100

Battery NiMH 550mAh C45

L36880-N4701-A101

Belt Clip C45

L36880-N4701-A103

CLIPit Covers Light Steel C45

L36880-N4701-A104

CLIPit Covers Hot Magma C45

L36880-N4701-A105

CLIPit Covers Cool Sky C45

L36880-N4701-A106

CLIPit Covers Fresh Lemon C45

L36880-N4701-A107

CLIPit Covers Dry Savanna C45

L36880-N4701-A108

CLIPit Covers Shining Pearl C45

L36880-N4701-A109

CLIPit Covers Metallic Grass C45

L36880-N4701-A110

CLIPit Covers Techno Ocean C45

L36880-N4701-A112

Battery LI-Ion 840mAh C45

L36880-S4501-A300

E-Box Carkit Voice S45/ME45/C45/M45 german

L36880-S4501-A301

E-Box Carkit Voice S45/ME45/C45/M45 english

L36880-S4501-A302

E-Box Carkit Voice S45/ME45/C45/M45 french

L36880-S4501-A600

Phone Adapter Cable Voice S45/ME45/C45/M45

L36880-S4501-A700

Phone Adapter Cable GPS S45/ME45/C45/M45

Accessories: