SIEMENS M55x Repair Documentation

Information and Communication Mobile

Mobile Phones

M55/M56

Level 2.5

Repair Documentation

V 1.0

M55/M56

Page 1 of 28

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ICM MP CCQ GRM

05/03

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Mobile Phones

Table of Content

1

Introduction..................................................................................................................... 3

2 I/O Connector (Slim Lumberg) ........................................................................................ 4

3 Battery Connector........................................................................................................... 8

4 Display Connector..........................................................................................................11

5 Antenna Connector........................................................................................................14

6 Card Reader ..................................................................................................................18

7 Board Connector............................................................................................................21

8 Light-Night LEDS...........................................................................................................25

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Mobile Phones

1 Introduction

M55 product is a tripleband (GSM900, GSM1800 and GSM1900) handsets and the M56 is a dualband mobilphone (GSM850 and GSM1900).

Partnumber on IMEI label:

M55: S30880-S6300-#xxx

M56: S30880-S7600-#xxx

, while # may be any letter (A-Z) and xxx may be any number from 100, 101, 102....

This manual is intended to help you carry out repairs on level 2.5, meaning limited component repairs. The documented failure highlights should be repaired in the local workshops.

All repairs have to be carried out in an environment set up according to the ESD (Electrostatic Discharge Sensitive Devices) regulations defined in international standards.

If you have any questions regarding the repair procedures or technical questions about the spare parts do not hesitate to contact our technical support team in Kamp-Lintfort, Germany:

Tel.: +49 2842 95 4666 Fax: +49 2842 95 4302 e-mail: st-support@klf.siemens.de

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2 I/O Connector (Slim Lumberg)

2.1 Affected Units

2.1.1 Type: M55/M56

Mobile Phones

2.1.2 Affected IMEIs / Date Codes:

2.1.3 Affected SW Versions:

2.2 Fault Description

2.2.1 Fault Symptoms for customers:

- Charging problems.

- Problems with external loudspeaker or microphone when using a car kit.

- Problems with accessories connected at the I/O - connector.

- Problems with SW booting

2.2.2 Fault Symptoms on GSM Tester:

This fault cannot be detected with a GSM-Tester

All / All

All

2.3 Priority:

¨ Mandatory þ ¨ ¨

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Repair Optional

Not Yet Defined

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2.4 Repair Documentation:

2.4.1 Description of procedure:

2.4.1.1 Diagnosis:

Visually check the bottom connector. Watch for dry joints:

2.4.1.2 Repair by component change:

Use hot air blower remove defective I/O connector. Avoid excessive heat! Watch surrounding components!

Resolder new I/O connector afterwards.

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2.4.1.3 Repair by Software booting:

Not possible!

2.4.1.4 Test:

Retest handset after repair.

2.4.2 List of needed material:

2.4.2.1 Components:

I/O Connector M55/M56 Part-Number: L36334-Z93-C303

2.4.2.2 Jigs and Tools:

Hot Air Blower Soldering Iron

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2.4.2.3 Special tools:

None

2.4.2.4 Working materials

Desolder Wick / Braid Solder

2.4.3 Drawings

Figure 1: M55/M56 board I/O connector

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Figure 2: M55/M56 I/O connector placement (top view)

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Table 1: M55/M56 Bottom Connector Pin Description

Pin Name IN/OUT Notes 1 POWER I/O POWER is needed for charging

batteries and for supplying the accessories

2 GND

3 TX_1 O Serial interface

4 RX_1 I Serial interface

5 CTS_1 I/O Data line for accessory bus

6 RTS_1 I/O Use as RTS in data operation

7 DCD_1 I/O Clock line for accessory bus

Use as DTC In data operation

8 AUDIO_P O External loudspeaker

9

10 AUDIO_N OI External loudspeaker

11 GND_MIC I External microphone

Mobile Phones

12 EPP1 O External microphone

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3 Battery Connector

3.1 Affected Units

3.1.1 Type: M55/M56

Mobile Phones

3.1.2 Affected IMEIs / Date Codes:

3.1.3 Affected SW Versions:

3.2 Fault Description

3.2.1 Fault Symptoms for customers:

Mobile does not switch on. Error message “WRONG BATTERY” on display.

3.2.2 Fault Symptoms on GSM Tester:

This fault cannot be detected with a GSM-Tester.

3.3 Priority:

¨ Mandatory

All / All

All

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þ ¨ ¨

Repair Optional

Not Yet Defined

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3.4 Repair Documentation:

3.4.1 Description of procedure:

3.4.1.1 Diagnosis:

Visually check the status of the Battery connector. Watch for oxidation and dry solder joints.

3.4.1.2 Repair by component change:

Use hot air blower remove defective Battery connector. Avoid excessive heat! Watch surrounding components!

Resolder new Battery connector afterwards.

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Mobile Phones

3.4.1.3 Repair by Software booting:

Not possible!

3.4.1.4 Test:

Retest handset after repair.

3.4.2 List of needed material:

3.4.2.1 Components:

Battery Connector M55/M56 Part-Number: L36334-Z97-C213

3.4.2.2 Jigs and Tools:

Hot Air Blower Soldering Iron

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