Siemens A 56, A 55, A 52 Service Manual

Local Service Organization Service Manual

BE INSPIRED

SIEMENS COMMUNICATIONS UNLIM ITED

Our innovation shapes the future

SIEMENS PTE LTD

A55 Level 2 Service Manual

Table of Contents

1 CELLULAR COMMUNICATION…………………………………………………….2

1.1 Subscriber Identity Module (SIM)…….………………………………………………………..4

2 WIRELESS APPLICATION PROTOCOL (WAP)………………………………….6

3 KEY FEATURES………………………………………………………………………8

4 COMPARISON WITH PERVIOUS PRODUCT……………………………………10

5 ACCESSORIES………………………………………………………………………11

5.1 Interface A55 with Accessories……………………………………………………………….11

5.2 Accessories Part Numbers……………………………………………………………………12

6 UNIT DESCRIPTION A55 PIRANHA………………………………………………13

6.1 Exploded View of A55 Piranha……………………………………………………………….14

7 DISASSEMBLY OF A55.......………………………………………………………..15

8 REASSEMBLY OF A55……………………………………………………………..17

9 MOBILE SOFTWARE PROGRAMMING………………………………………….18

9.1 Mobile Software Updating…………………………………………………………………….19

9.2 Flow Chart for Software Updating……………………………………………………………20

10 SIEMENS SERVICE EQUIPMENT USER MANUAL…………………………….21

11 PICS INTERNET……………………………………………………………………..22

12 INTERNATIONAL MOBILE EQUIPMENT IDENTITY, IMEI…………………….27

13 GENERAL TESTING INFORMATION…………………………………………….28

SIEMENS PTE LTD

A55 Level 2 Service Manual

1 Cellular Communication

The cellular systems are made up of numerous transmitting and receiving sites, whose individual

coverage areas partially overlap. The concept of frequency reuse, 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.

GSM Net 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 Centre (MSC) which performs the switching of calls between the mobile users, and between mobile and fixed network users.

SIEMENS PTE LTD

A55 Level 2 Service Manual

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 Centre, 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.

SIEMENS PTE LTD

A55 Level 2 Service Manual

1.1 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

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

SIEMENS PTE LTD

A55 Level 2 Service Manual

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

SIEMENS PTE LTD

A55 Level 2 Service Manual

A55 is a GSM Phase 2 / Phase 2+ Dual band E-GSM / GSM 1800 mobile phone.

2 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 mark-up language (WML), for information or service. The request

is passed to a WAP Gateway, which then retrieves the information from an Internet server, in

HTML format, and translates 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.

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

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.

SIEMENS PTE LTD

A55 Level 2 Service Manual

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 A55 is possible with the inclusion of Wireless Application Protocol

(WAP) browser 1.2.1

SIEMENS PTE LTD

A55 Level 2 Service Manual

3 Key Features

General:

Battery

Stand-by Time

Talk Time

· EMS

· WAP 1.2.1

· Exchangeable Housing

· Hands free

· Amber Backlight for Display

· Li Ion Battery Pack from L55 Platform (C55/2128 and S55/57)

· Nominal Capacity: 750mAh

· GSM Capacity : 700mAh

· Power Input : 1.8A (0.6ms) / 0.2A (4ms)

· Cut-off Threshold : 3.2V

· Approx. 250 h / Li Ion (measured at BSPAMFRMS = 9; number of

neighbouring cells = 0)

· Best case approx. : 5 hours (lowest output level with DTX)

SIM Card

Speech Coder

Temperature Range

· Worst case approx. : 2.5 hours (highest output level with DTX)

Condition for DTX : 40% user talk time

· Small (=”Plug In”) 1.8V or 3V SIM card (Phase II)

· To insert the SIM card, the battery pack must be removed

· The SIM reader coding will be realised by lower case

· Full Rate, Enhanced Full Rate, Adaptive Multi Rate and Half Rate

speech coders are available as standard.

· -10˚C to +55˚C (Normal operation)

· -30˚C to +85˚C (Storage capability)

SIEMENS PTE LTD

A55 Level 2 Service Manual

Display

Keypad

· Type: Full Graphic

· Resolution: 101 x 64 Pixel

· Technology: FSTN

· Pixel size / mm: 0.277 x 0.297

· Pixel distance / mm: 0.015

· Active area / mm: 29.5 x 20.0

· Visible area / mm: 33.0 x 23.2

· Illumination: Amber (approx: 590nm)

· 12-digit block (0-9, #, *), small letters

· Two function keys (SEND, END)

· ON/OFF key combined with the END key; the symbol ¼ (I inside O)

is used as a symbol for ON/OFF

· 2 way navigation key up & down

· 2 softkeys on left & right position

· Amber as illumination colour

· Orientation at the housing in the area between keys “5“ and “8”

Acoustics

· Comfortable earpiece with optimal acoustics

· Unidirectional microphone (similar to SL45 with modified rubber

gasket)

· Loud signal emitter (sound ringer) (>100dB(A) SPL @5cm,

'Hongkong-Spec.')

· Different call melodies (for the amount see SW product description).

All melodies with increasing volume because of the danger of

acoustic shock. Additional measures to protect from acoustic shock

see SW product description.

· Different selectable volume levels for handset and ringer mode (for

the amount see SW product description)

SIEMENS PTE LTD

A55 Level 2 Service Manual

4 Comparison with Previous Product

Feature A50 A55

Supported Systems

Stand-by Time Up to 200 h Up to 250 h

Talk Time Up to 5 h Up to 5 h

Dual Band E-GSM 900 / GSM 1800

Battery Technology Battery Capacity

Weight approx. 106 g approx. 84 g

Volume approx. 82 cm3 approx. 75 cm3

Length 108,9 mm 103,1 mm

Width 42.0 ... 46.0 mm (Panth) max. 46 mm

Thickness 19.0 ... 23.0 mm (Panth) max. 21.7 mm

SIM Plug-In 1.8V/3V Plug-In 1.8V/3V

Antenna

Antenna performance in comparison to S35:

SAR ? < 1.0 W/Kg

Half Rate Yes Yes

Enhanced Full Rate Yes Yes

AMR No No

Fax/Data No

GPRS No No

Ni-MH Battery Pack Nominal Cap.: 550 mAh

Integrated external RF connection

-0,5 dB @ 900 MHz

-0,3 dB @ 1800 MHz

Li-Ion Battery Pack Nominal Cap.: 750 mAh

Integrated no external RF connection

-0,8 dB @ 900 MHz

-0,5 dB @ 1800 MHz

see the SW production Description

Keypad Illumination Yes (amber) Yes (amber)

Display / Display Illumination

Ringer volume level

FSTN full dot matrix, 5 lines graphic amber

Min. 100 dB(A) @ 5cm Typ. >103 dB(A) @ 5cm

FSTN full dot matrix, 5 lines graphic amber

Min. 100 dB(A) @ 5cm Typ. >103 dB(A) @ 5cm

+ 23 hidden pages