Siemens A52, A55, C55 Service Manual

Information and Communication Mobile

Mobile Phones

V 1.1

A55/C55

V 1.1

Page 1 of 26

Company Confidential

ICM MP CCQ GRM

04/03

Information and Communication Mobile

Mobile Phones

Table of Content

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

1

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

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

4 Antenna Connector (C55only)........................................................................................12

5 Card Reader ..................................................................................................................16

6 Keypad LEDs.................................................................................................................20

7 Display LEDs .................................................................................................................23

V 1.1

A55/C55

Page 2 of 26

Company Confidential

ICM MP CCQ GRM

04/03

Information and Communication Mobile

Mobile Phones

1 Introduction

C55 product is a dualband (GSM900 and GSM1800) handset.

This product is developed with different HW in the radio part, which can not be distinguished on the IMEI label. The HITACHI (HIT) as the INFINEON (IFX) boards have the same logic part. For all described Level 2.5 components you find a board type identification in the document as shown below.

HIT component used only in HITACHI version IFX component used only in INFINEON version HIT/IFX component used in HITACHI and INFINEON versions

Partnumber on IMEI label:

C55: S30880-S5600-#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

V 1.1

A55/C55

Page 3 of 26

Company Confidential

ICM MP CCQ GRM

04/03

Information and Communication Mobile

2 I/O Connector (Slim Lumberg)

2.1 Affected Units

2.1.1 Type: C55

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 ¨ ¨

V 1.1

A55/C55

Repair Optional

Not Yet Defined

Page 4 of 26

Company Confidential

ICM MP CCQ GRM

04/03

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.

Information and Communication Mobile

Mobile Phones

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 C55 HIT/IFX Part-Number: L36334-Z93-C303

2.4.2.2 Jigs and Tools:

Hot Air Blower Soldering Iron

V 1.1

A55/C55

Page 5 of 26

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ICM MP CCQ GRM

04/03

2.4.2.3 Special tools:

None

2.4.2.4 Working materials

Desolder Wick / Braid Solder

2.4.3 Drawings

Figure 1: C55 IFX board I/O connector

Information and Communication Mobile

Mobile Phones

Figure 2: C55 HIT board I/O connector

V 1.1

A55/C55

Company Confidential

Page 6 of 26

ICM MP CCQ GRM

04/03

Information and Communication Mobile

Figure 3: C55 IFX/HIT I/O connector placement (top view)

Table 1: C55 IFX/HIT 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 O Serial interface

4 RX I Serial interface

5 CTS I/O Data line for accessory bus

6 RTS I/O Use as RTS in data operation

7 DCD I/O Clock line for accessory bus

Use as DTC In data operation

8 AUDIO_L O External loudspeaker

9 AUDIO_REF mid-voltage in stereo mode refernce

to AUDIO_L and AUDIO_R in mono mode not used

10 AUDIO_R OI External loudspeaker

11 GND_MIC I GND for external microphone

Mobile Phones

12 MICP2 O External microphone

V 1.1

A55/C55

Page 7 of 26

Company Confidential

ICM MP CCQ GRM

04/03

Information and Communication Mobile

3 Battery Connector

3.1 Affected Units

3.1.1 Type: C55

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

þ ¨ ¨

V 1.1

A55/C55

Repair Optional

Not Yet Defined

Company Confidential

Page 8 of 26

ICM MP CCQ GRM

04/03