Siemens M55 Service Manual

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M55 Level 2 Service Manual

Table of Contents

1 GPRS (GENERAL PACKET RADIO SERVICE) .................................................................... 2

2 K-JAVA APPLICATION........................................................................................................... 3

3 KEY FEATURES ...................................................................................................................... 4

4 COMPARISON WITH PREVIOUS PRODUCT ....................................................................... 7

5 ACCESSORIES........................................................................................................................ 8

6 UNIT DESCRIPTION M55 ....................................................................................................... 9

6 UNIT DESCRIPTION M55 ..................................................................................................... 10

7 DISASSEMBLY OF M55 ....................................................................................................... 12

8 REASSEMBLY OF M55 ........................................................................................................ 15

9 MOBILE SOFTWARE PROGRAMMING.............................................................................. 16

10 SIEMENS SERVICE EQUIPMENT USER MANUAL........................................................ 20

11 PICS INTERNET................................................................................................................. 21

12 INTERNATIONAL MOBILE EQUIPMENT IDENTITY, IMEI............................................. 26

13 GENERAL TESTING INFORMATION............................................................................... 27

ANNEX 1 ........................................................................................................................................ 32

ANNEX 2 ........................................................................................................................................ 33

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M55 Level 2 Service Manual

1 GPRS (General Packet Radio Service)

GPRS is a new non-voice value added services that allows information to be sent and received

across a GSM mobile telephone network. It supplements today’s Circuit Switched Data (CSD)

and Short Message Services (SMS). GPRS involves overlaying a packet based air interface on

the existing circuit switched GSM network. This gives the option to use a packet-based data

service. The information is split into separated but related “packets” before being transmitted and

reassembled at the receiving end. Theoretically, maximum speeds of up to 171.2 kilobits per

second (kbps) are achievable with GPRS using all eight timeslots at the same time. This is about

3 times as fast as the data transmission speed possible over today’s fixed telecommunications

networks and 10 times as fast as current Circuit Switched Data services on GSM networks.

Figure1. Example of GPRS data transmission

Example

1 physical channel for signaling, 4 physical channels for Circuit switched and 3 physical channels

for Packet switched.

: Cell with 1 Frequency channel:

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M55 Level 2 Service Manual

2 K-Java Application

Java-based game system

Java Application

Manager (JAM)

RAM for Java

applications

MIDP 1.0, CLDC 1.0 As SL45i, including performance

'OEM extensions' Proprietary API extensions as SL45i.

Application launcher and download manager.

Supports HTTP-based OTA download of applications over GPRS and CSD.

Available RAM for Java applications (ie. program code and data) during application runtime:

Minimum: 100 Kbyte (Has to be taken as working assumption for application development.)

Goal: 145 Kbyte as SL45i (not committed)

optimizations from SL45i-Infusio.

Including 'Siemens Game API'

yes

HTTP API over GPRS SL45i: only over CSD yes

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M55 Level 2 Service Manual

3 Key Features

Bands

Battery

Stand-by Time

Talk Time

• GSM/GPRS 900/1800/1900 MHz (GPRS CL.8)

• LI-Ion Battery Pack

• Nominal Voltage : 3.6V

• Nominal Capacity : 750 mAh

• GSM Capacity : 700 mAh

• 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)

• Worst case approx. : 2.0 hours (highest output level with DTX)

Condition for DTX : 40% user talk time

SIM Card

GSM Antenna

Receiver Sensitivity

• Small (=”Plug In”) 3V SIM card (Phase II)

• To insert the SIM card, the battery pack must be removed.

• A triple band PIFA antenna will be an integral part of the

mobile phone.

• EGSM: -102 dBm (-104dBm-15.2) (Specification; static & with

fading)

• PCN : -102 dBm (Specification; static & with fading)

The reception sensitivity must comply with the corresponding GSM recommendations in all operating conditions (temperature, battery level ...).

• EGSM: measurements according typical sensitivity are not yet

available.

• PCN: measurements according typical sensitivity are not yet

available

Measurement values are refered to the external antenna

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M55 Level 2 Service Manual

connector.

Transmitter Power

Speech Coder

Temperature

Range

Display

• EGSM: nominal 2W (Specification: Class 4 Mobile phone)

• PCN: nominal 1W (Specification: Class 1 Mobile phone)

Transmitter output characteristics is according to GSM 11.10 specification implying all specified operating conditions (temperature, battery level, ...).

Transmitter setpoints will be specified for GSM and PCN when typical values and statistical values become available.

• Full Rate, Enhanced Full Rate, HR and AMR.

• -10LC to +55LC (Normal operation)

• -30LC to +85LC (Storage capability)

• Type: Full Graphic

• Resolution: 101 x 80 Pixel

• Colour depth: 4096

Keypad

• Technology: Colour STN

• Active area / mm: 29.379 x 25.265

• Visible area / mm: max. 32.4 x 28.9

• Illumination: 2 White LED

• Contrast: Adjustable

• Partially bridgeless

• 12-digit block (0-9, #, *) and two function keys (SEND, END) in

one block with small letters.

• ON/OFF key combined with the END key; the symbol  (I

inside O) is used as a symbol for ON/OFF.

• 2 soft keys

• 4-way navigation key designed as centred rocker type.

• Illumination colour : Red

• Orientation at key “5”

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M55 Level 2 Service Manual

Acoustics

• Comfortable earpiece

• Omni-directional microphone

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M55 Level 2 Service Manual

4 Comparison with Previous Product

Feature S55 SL55 M 55

Supported Systems Stand-by Time Talk Time Up to 6 h Up to 3,5 h Up to 5 h Battery Type / Capacity Weight Approx. 95 g Approx. 75 g Approx. 95 g Volume Approx. 69 cm Length 101 mm 81,6mm 100.8 mm Width 42.0 ... 46.0 mm 44,5mm 45.6 mm Thickness 17.5 … 18.9 mm 21,9mm 20.9 mm SIM Plug-In 1.8V/3V Plug-In 1.8V/3V Plug-In 1.8V/3V Antenna Integrated Integrated Integrated Antenna Perform. relative to C25

SAR related to 1 g

Half Rate Yes Yes Yes Enhanced Full Rate AMR Yes Yes Yes Fax/Data Yes Yes Yes GPRS Yes, class 8

Keypad Illum. Yes, blue LED Yes yes Display / Display

Illumination Ringer volume level

Triple band E-GSM 900 /1800/1900 Up to 250 h Up to 200h Up to 250 h

LI-Ion Battery Pack Nominal Cap.: 750 mAh

-0.4 dB @ 900 MHz

-0,3 dB @ 1800 MHz

-0,3 dB @ 1900 MHz compared to S40

1.0 W/kg @ 900 MHz

0.8 W/kg @ 1800 MHz

0.8 W/kg @ 1900 MHz

Yes Yes Yes

class 10 tbc until S2

CSTN full dot matrix, 6 lines graphic + icons /

white Min. 95 dB(A) @ 5cm Typ. >100 dB(A) @ 5cm see comment below acoustics7.2.3

Triple band GSM 900 /1800/1900

LI-Polymer Battery Pack Nominal Cap:xxxxx

Approx. 63 cm

Fugu

28,3dBm – GSM900 26,1dBm – GSM1800 25,2dBm – GSM1900

S40

29.6dBm – GSM900 25,3dBm – GSM1800 25,4dBm – GSM1900

T68 Ericsson

29,7dBm – GSM900 25,8dBm – GSM1800 24,6dBm – GSM1900

T66 Ericsson

27,4dBm – GSM900 23,5dBm – GSM1800 25,4dBm – GSM1900

Nokia8810

25.2dBm – GSM900

C55Tuna

29,2dBm – GSM900 27,2dBm – GSM1800 cw26– GSM1900

Measurement equipment done in MchG

0.8 W/kg @ 900 MHz

0.8 W/kg @ 1800 MHz

0.8 W/kg @ 1900 MHz

Yes, class8

4K color STN full dot matrix, 6 lines grapic + icons

white Min. 95 dB(A) @ 5cm

Triple band GSM 900 /1800/1900

LI-Ion Battery Pack Nominal Cap.: 750 mAh

Approx. 69 cm

-0.4 dB @ 900 MHz

-0,3 dB @ 1800 MHz

-0,3 dB @ 1900 MHz compared to S40

1.0 W/kg @ 900 MHz

0.8 W/kg @ 1800 MHz

0.8 W/kg @ 1900 MHz

Yes, class8

4K color STN full dot matrix, 6 lines grapic + icons

white

Typ. >100 dB(A) @ 5cm see comment below acoustics7.2.3

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Car Data Adapter (for CK Prof.

M55 Level 2 Service Manual

5 Accessories

For the M55, the following accessories will be available.

Description Product Code Part number

Li-Ion Battery 700 mAh EBA-510 L36880-N5601-A100

Car Charger ECC-500 L36880-N5601-A106

Travel Charger (Euro) ETC-500 L36880-N5601-A104

Travel Charger (UK) ETC-510 L36880-N5601-A105

Desk Top Charger (dual slot) EDC-510 L36880-N5601-A101

Carry Set FCS-520 L36880-N6301-A113

Leather Case FCL-500 L36880-N5601-A136

Leather Holster FCL-510 L36880-N5601-A137

Belt Case FCL-520 L36880-N5601-A138

Loop Case FCT-500 L36880-N5601-A139

Tour Case FCT-550 L36880-N5601-A140

Headset with PTT HHS-510 L36880-N5601-A108

Basic Car Pack (Headset, Car Charger, Y-Adapter)

Car Kit Portable HKP-500 L36880-N5601-A109

Mobile Holder HMH-540 L36880-N6301-A104

Mobile Holder Antenna HMH-550 L36880-N6301-A105

Car Kit Comfort HKC-540 L36880-N6301-A106

Car Kit Professional Voice II (D) HKV-560 L36880-N6301-A108

Car Kit Professional Voice II (E) HKV-570 L36880-N6301-A109

HKB-500 L36880-N5601-A118

Car Kit Upgrade Comfort/Voice HKO-505 L36880-N6301-A111

Car Kit Upgrade Voice II HKO-515 L36880-N6301-A112

Voice II)

HKO-530 L36880-N5701-A108

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M55 Level 2 Service Manual

Car Handset HKO-550 L36880-N3015-A123

Adapter Cable VDA for Car Kit Comfort

Push To Talk Key (for CK Prof. Voice II)

Phone-In-Adapter HKO-570 L36880-N3015-A137

Data Link Cable DCA-500 L36880-N5601-A110

Data Link Cable USB DCA-510 L36880-N5601-A111

Sync Station DSC-500 L36880-N5601-A103

Quick Pic IQP-530 L36880-N6301-A102

HKO-560 L36880-N4001-A121

HKO-520 L36880-N3015-A137

5.1 Interface M55 to accessories

The I/O Connector of M55 is the slim Lumberg (identical to SL55, S55/57, C55/2128 and A55).

It is the only electrical interface to the Accessories (no RF – connector). Also it has only one

mechanical interface which is integrated in the design parts.

Slim Lumberg I/O Connector

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M55 Level 2 Service Manual

6 Unit Description M55

M55 is designed with a partly bridgeless keypad module and a color display. The mechanical

design is built around the platform of S55. The housing is built up as a two-component plastic

molding part so that the housing shows an “X-design” with two different colors. The complete

housing is lacquered with a translucent effect varnish, which gives the housing a pearlescent

look. Earpiece and keypad are decorated with IMF in the same color. Behind the earpiece is a

metal mesh located, which is also the sound outlet of the receiver. The display lens is decorated

from its outside with IMD and anti scratch protection.

M55 has the same PCB size as S55, which allows using the same carrier in production.

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M55 Level 2 Service Manual

6.1 Exploded View of M55

Upper Case Shell w/o Keypad Palladium C39158-A110-A101

Keypad with MMI Latin Palladium C39158-A110-A600

Earphone C39212-Z3-C51

Main Board S30880-Q6300-A200

Shielding Cover RF C39158-A84-C204

Microphone C39254-Z6-C101

SIM Shielding Cover C39158-A84-C90

Lower Mounting Frame w/o VibraAlert Unit Microphone and SIM Shielding Cover Palladium C39158-A110-A250

Displaymodule V24851-Z1508-A92

Shielding Cover Logik C39158-A84-C208

Shielding Cover BT C39158-A84-C206

Shielding Cover MMI C39158-A84-C202

Vibramotor C39453-Z5-C205

Screw C39158-A84-C94

Battery Li-Ion V30145-K1310-X250

Battery Cover Palladium C39158-A110-B500

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M55 Level 2 Service Manual

7 Disassembly of M55

Note: ESD concept; the internal circuits will be more susceptible to ESD because of the use of exchangeable

housing. The construction of the internal block must be/is designed, in the best possible way, to protect the circuit

against sparks.

The keypad must be completely closed to prevent any occurrence of an ESD disruptive discharge.

The SIM contacts may be open, thus reachable for ESD contact discharge. This could lead to damage or destruction of

the EGold pins.

It is a requirement for the service personnel to observe ESD protection rules while performing servicing the M55.

Step 1

Step 3

Front view of the M55

Step 2

Back View of the M55

Step 4

The Batterypack is secure within the Lowercase

Remove the Battery Cover by lifting it upwards.

carvity. To remove the Batterypack, first release the catch (indicated by the circle) and next, lift it outwards.

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M55 Level 2 Service Manual

Step 5

Remove the SIM card from the SIM-holder by pushing it upwards.

Step 7

Step 6

Unscrew the four screws with a Torx Plus 5IP tip screwdriver.

Step 8

Remove the Uppercase from the Lowercase with a case opener.

Remove the MMI with keypad from the Uppercase.

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M55 Level 2 Service Manual

Step 9

Remove the PCB from the Lowercase.

Step 11

Step 10

Remove the Vibra and Microphone from the Lowercase with a pair of tweezers.

Step 12

Remove the Receiver from the PCB, and the Display-Module from the Display-Frame.

Fully disassembled M55.

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M55 Level 2 Service Manual

8 Reassembly of M55

For the reassembly of the M55, simply reverse the disassembly procedures from Step 12

to Step 1. However there are some areas to be taken note during reassembling of the

phone.

The torque for the screwdriver should be set at 12Ncm for the 5IP screws.

(1) (2)

Insert the SIM Card as shown in (1). Properly inserted SIM card

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M55 Level 2 Service Manual

9 Mobile Software Programming

The common mobile software available is divided into language groups. However, this software

does not contain the specific settings, such as ringing tones, greeting text, short dial list, etc.

required by the operator(s) or service provider(s). Therefore, it is common to have some menu

item(s) differ in different variants or are not visible at all. These settings are stored in different

memory area of the mobile and will be activated depending on the customer specific model or

variant of the phone by a separate test step during the production process.

Due to this separation of common mobile software and customer specific initialization, it is

possible to fulfil the demands of the market requiring customization and flexibility. As a

consequence the software programming process in the LSO is divided into two different steps as

followed:

- Software update to actual version and appropriate language group.

- Programming of Customer Specific Initialization.

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M55 Level 2 Service Manual

Figure 2. M55 Software Programming Setup

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M55 Level 2 Service Manual

9.1 Mobile Software Updating

The software of the mobile, L55 series is loaded from a PC directly. Hardware interconnection

between the mobile and the PC is shown in Figure 2.24 Because of the new type of external

connector used in L55 series (Slim-Lumberg type) an additional adaptor cable between mobile

and boot adaptor is required. Table 2.1 listed all the hardware requirements

If you use the battery dummy, make sure that the power supply voltage is correctly adjusted.

Description Part No.

Bootadapter 2000 incl. AC-Adapter,

L36880-N9241-A200

serial cable and mobile connection cable

IBM Compatible PC – Pentium -

Adapter cable F30032-P226-A1

TABLE 2.1 EQUIPMENT LIST FOR SOFTWARE PROGRAMMING

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M55 Level 2 Service Manual

9.2 Flow Chart for Software Upgrading

Plug in the Boot Adaptor to the PC and Mobile

Connect the AC adaptor to the Boot Adaptor

Power up Boot Adaptor & check LED.

OK?

YES

Start the SWUP

program

Select & Execute the "Mobile S/W"

ERROR?

YES

Check

H/W setup = S/W

S/W upgrading in

progress

ERROR?

TEST Mobile

Take note of error and repeat process

YES

Check AC Adaptor

YES

Faulty AC Adaptor

Faulty Boot

FLOW CHART FOR S/W PROGRAMMING PROCESS

OK?

Adaptor

OK?

Correct Settings

Feedback Error to Tech. Supp. Dep

END

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

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M55 Level 2 Service Manual

10 Siemens Service Equipment User Manual

Introduction

Every LSO repairing Siemens handset must ensure that the quality standards are observed.

Siemens has developed an automatic testing system that will perform all necessary

measurements. This testing system is known as:

Siemens Mobile Service Equipment

Using this system vastly simplifies the repair of the phones and will make sure that:

1. All possible faults are detected

2. Sets, which pass the test, will be good enough to return to customer.

Starting from the P35 Series, Siemens will introduce a simpler and faster testing platform for

testing a repaired Siemens mobile phone. The testing platforms are either base on R&S CMD

53/55 or CTS55 GSM test set or CMD200 with a software called (CTS, CMD, or CMU-GO).

There is also test software available for testing with the Willtec 4201S the 4107 and the 4400

GSM test set called (CATS 4200 or CATS4400).

THE LSO WILL HAVE TO PURCHASE THE SYSTEM, CHOOSING BETWEEN THE COMPLETE PACKAGE OR SUB-SET OF IT.

A FULLY AUTOMATIC TEST PROCEDURE IS ONLY POSSIBLE IF THE COMPLETE SYSTEM IS INSTALLED.

Make sure that your CTS firmware is Version 3.01 or higher. For CMD 55 it must be Version 4.03 and higher. Please check with the Service Info SB_0500 for the CTS/CMD Hardware Options.

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M55 Level 2 Service Manual

11 PICS Internet

Overview

The following functions are available for the LSO

• Generate PINCODE

• Generate SIMLOCK-UNLOCK-Code

• Print IMEI labels

The access to the server which is located in Kamp-Lintfort is protected and will only be

granted to authorize users being supplied with a special coded chipcard.

Chipcards and the administration services of the PICS database are provided by PICS-

TRUST- Center at department ICP MP OI Kamp-Lintfort.

In case of any questions or requests concerning chipcards or administration of the

database please ask your responsible Siemens Customer Care Manager.

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M55 Level 2 Service Manual

Installation for Windows 95 / 98 / NT / 2000

Requirements

In order to use the PICS-Internet websites you need a fully configured internet access with a

32bit NETSCAPE-Browser.

Remark:

Microsoft Internet Explorer and Netscape versions above 4.7x cannot be used!

There is a 90-day-trial-version of Netscapes Navigator 4.6 in English or German available on

the PICS installation CD provided by Siemens.

Every user is responsible for a proper installation matching the license

agreements.

For installation and further access you need the following:

1. The Installation-CD which contains:

• the SETUP program for the InterSEC plugin

• the trial version of Netscape Navigator 4.6 (German / English)

• the German / English documentation

2. A chipcard which is authorized by ICP MP OI KLF in order to decode the protected PICS

Websites (and a password which gives you access to your chipcard). Chipcards can be

ordered via your responsible Customer Care Manager within Siemens.

3. A supported chipcard reader (Smarty or Siemens B1) in order to access your chipcard.

Remark:

We recommend using the Siemens B1 reader. Similar device to B1 is Cardman 9010.

Generate Codes

In the module “Generate Codes“you can choose to generate:

- Master - Phonecodes

- Simlock Unlock – Codes

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M55 Level 2 Service Manual

Master - Phonecodes

The Master – Phonecode is used to unlock blocked mobiles.

Master – Phonecodes can only be supplied for mobiles which have been delivered in a

regular manner.

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M55 Level 2 Service Manual

Simlock Unlock - Code

The Simlock-Unlock-Codes can only be generated if the following conditions are given:

- Mobile must have an active Simlock inside.

- The user must be given the authorization to obtain Simlock Unlock- Codes for the variant

of the operator to which the mobile was delivered last time.

Hint:

If there's no such authorization you'll get the following screen:

In this case please contact your responsible Siemens Customer Care Manager.

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M55 Level 2 Service Manual

Printing IMEI label

The module “Print IMEI label” offers the possibility to print IMEI labels for mobiles again.

You are able to print up to six labels in just one step.

To prevent that misaligned labels are being printed, the setting "test printer = Yes" is activated as

default. After having printed a well-aligned test label you can switch setting to "No" and print the

correct label.

Hint:

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M55 Level 2 Service Manual

For correct printing of IMEI labels you must have a Zebra – label printer with special

material that fits for label printing. This printer has to be connected to local LPT1 printer port

(also see Installation of IMPRINT) and MUST feature a printing resolution of 300dpi.

12 International Mobile Equipment Identity, IMEI

The mobile equipment is uniquely identified by the International Mobile Equipment Identity, IMEI,

which consists of 15 digits. Type approval granted to a type of mobile is allocated 6 digits. The

final assembly code is used to identify the final assembly plant and is assigned with 2 digits. 6

digits have been allocated for the equipment serial number for manufacturer and the last digit is

spare.

The part number for the A55 is S30880-S5750-Axxx where the last 4 letters specify the housing

and software variant.

C45 series IMEI label is accessible by removing the battery.

Re-use of IMEI label is possible by using a hair-dryer to remove the IMEI label.

On this IMEI label, Siemens has also includes the date code for production or service, which

conforms to the industrial standard DIN EN 60062. The date code comprises of 2 characters: first

character denotes the Year and the second character denotes the Month. For example, the IMEI

above show date code M3.

Year Date Code Month Date Code

1999 L December D

2000 M January 1 2001 N February 2

TABLE 2.3 DIN EN 60062 DATE CODE

To display the IMEI number, exit code and SW/HW version, key: *#06#.

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M55 Level 2 Service Manual

13 General Testing Information

General Information

The technical instruction for testing GSM mobile phones is to ensure the best repair quality.

Validity

This procedure is to apply for all from Siemens AG authorized level 2 up to 2.5e workshops.

Procedure

All following checks and measurements have to be carried out in an ESD protected

environment and with ESD protected equipment/tools. For all activities the international ESD

regulations have to be considered.

Get delivery:

 Ensure that every required information like fault description, customer data a.s.o. is

available.

 Ensure that the packing of the defective items is according to packing requirements.

 Ensure that there is a description available, how to unpack the defective items and

what to do with them.

Enter data into your database:

(Depends on your application system)

 Ensure that every data, which is required for the IRIS-Reporting is available in your

database.

 Ensure that there is a description available for the employees how to enter the data.

Incoming check and check after assembling:

!! Verify the customers fault description!!

 After a successful verification pass the defective item to the responsible

troubleshooting group.

 If the fault description can not be verified, perform additional tests to save time and to

improve repair quality.

- Switch on the device and enter PIN code if necessary unblock phone.

- Check the function

- Check the display for error in line and row

- Check the ringer/loudspeaker acoustics by individual validation.

of all keys including side keys.

, and for illumination.

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M55 Level 2 Service Manual

- Perform a GSM Test as described on page 31.

Check the storage capability:

 Check internal resistance and capacity of the battery.

 Check battery charging capability of the mobile phone.

 Check charging capability of the power supply.

 Check current consumption of the mobile phone in different mode.

Visual inspection:

 Check the entire board for liquid damages.

 Check the entire board for electrical damages.

 Check the housing of the mobile phone for damages.

SW update:

 Carry out a software update and data reset according to the master tables and

operator/customer requirements.

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M55 Level 2 Service Manual

GSM Test:

 Connect the mobile/board via internal antenna (antenna coupler) and external

antenna (car cradle) to a GSM tester.

 Use a Test SIM.

 Skip GSM 900/GSM1800 or GSM1900 test cases if not performed by the mobile

phone.

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M55 Level 2 Service Manual

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M55 Level 2 Service Manual

Final Inspection:

The final inspection contains:

1) A 100% network test (location update, and set up call).

2) Refer to point 3.3

3) A random sample check of:

- data reset (if required)

- optical appearance

- complete function

4) Check if PIN-Code is activated (delete the PIN-Code if necessary).

Basis is the international standard of DIN ISO 2859.

Use Normal Sample Plan Level II and the Quality Border 0,4 for LSO.

Remark: All sample checks must be documented.

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M55 Level 2 Service Manual

Annex 1

Test SIM Card

There are 2 different “Test-SIM-Cards” in use

a) Test SIM from the company “ORGA”

Pin 1 No: 0000 PUK 1: 12345678

Pin 2 No: 0000 PUK 2: 23456789

b) Test SIM from the company “T-D1”

Pin 1 No: 1234 PUK 1: 76543210

Pin 2 No: 5678 PUK 2: 98765432

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M55 Level 2 Service Manual

Annex 2

Battery – Date – Code overview

Siemens M55 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual