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Siemens S25 Service Manual

Information and Communication Products
Communication Devices
S25(88)
Level 2.5
Repair Documentation
V 1.0
V1.0 Page 1 of 39 ICP CD ST
D. Schnoor
Information and Communication Products
Communication Devices

1Introduction

The S25 is the first dualband handset (GSM-900 and GSM-1800) in the S-class. The S2588 is a special version for the asian market with the same hardware but a different Software.
The repairs for S25 and S2588 are identical unless otherwise noted.
This manual is intended to help you carry out repairs on level 2.5, meaning limited component repairs. Failure highlights are documented and should be repaired in the local workshops.
It must be noted that 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 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: dominik.schnoor@klf.siemens.de
V1.0 Page 2 of 39 ICP CD ST
D. Schnoor
Information and Communication Products
Communication Devices
Table of Contents:
1 INTRODUCTION................................................................................................................................................2
2 ANTENNA CONNECTOR
...................................................................................................................................................................................4
3 RINGER CONNECTOR
...................................................................................................................................................................................8
BOTTOM CONNECTOR (LUMBERG)
.................................................................................................................................................................................11
4 18ΜH COIL
.................................................................................................................................................................................15
5 ANTENNA SPRING
.................................................................................................................................................................................19
6 1,5 A FUSE
.................................................................................................................................................................................22
7 CARDREADER.................................................................................................................................................25
8 VIBRACONNECTOR.......................................................................................................................................28
9 SIDESWITCH MMI..........................................................................................................................................31
10 CONNECTOR MMI.......................................................................................................................................35
V1.0 Page 3 of 39 ICP CD ST
D. Schnoor
Information and Communication Products
Communication Devices

2Antenna Connector

2.1Affected Units

2.1.1Type: S25

2.1.2Affected IMEIs / Date Codes: All / All

2.1.3Affected SW-Versions: All

2.1.4Fault Code for LSO reporting: 3ANC

2.2Fault Description

2.2.1Fault Symptoms for customers:

Network Search when using the external antenna (carkit) No location update possible on external antenna (carkit)

2.2.2Fault Symptom on GSM-Tester:

Output power problems on the external antenna No location update possible

2.2.3Component Information

The Antenna Connector is a mechanical switch operated by the RF plug of a carkit or, for testing purposes, of an RF clip. Normally the RF signal goes to and comes from the internal antenna. Whenever an RF plug is plugged into the antenna connector the connection to the internal antenna is openend and the connection to the external antenna socket is made. See drawing below.
V1.0 Page 4 of 39 ICP CD ST
D. Schnoor
Information and Communication Products
Communication Devices

2.3Priority:

........ Mandatory
........ Repair
........ Optional
........ Not Yet Defined

2.4Repair Documentation

2.4.1Description of procedure:

2.4.1.1Diagnosis
Check the output power of the handset with the LSO testprogram. Especially watch the external antenna power!
2.4.1.2Repair by component change
Use hot air blower to remove defective connector Avoid excessive heat! Watch surrounding components!
V1.0 Page 5 of 39 ICP CD ST
D. Schnoor
From Power Amplifier/ To Receiver
To / From Internal Antenna
Information and Communication Products
Communication Devices
Resolder new connector afterwards.
2.4.1.3Repair by SW-Booting
Not possible!
2.4.1.4Test
Retest handset after repair as described above.

2.4.2List of needed material

2.4.2.1Components
S25 antenna connector Part-Number: L36334-Z93-C261
2.4.2.2 Jigs and Tools
Hot Air Blower Soldering Iron
2.4.2.3Special Tools
None
2.4.2.4Working materials
Desolder Wick / Braid Solder

2.4.3Drawings

V1.0 Page 6 of 39 ICP CD ST
D. Schnoor
Figure 2: C25 Antenna Connector Placement (X400) (Top View)
Figure 1: S25 Board Antenna Connector Side (Top View)
Information and Communication Products
Communication Devices
V1.0 Page 7 of 39 ICP CD ST
D. Schnoor
Figure 2: S25 Antenna Connector Side (Top View)
Information and Communication Products
Communication Devices

3Ringer Connector

3.1Affected Units

3.1.1Type: S25

3.1.2Affected IMEIs / Date Codes: All / All

3.1.3Affected SW-Versions: All

3.1.4Fault Code for LSO reporting: 3RIC

3.2Fault Description

3.2.1Fault Symptoms for customers:

Problems with the handset ringer. No ringer tone audible.

3.2.2Fault Symptom on GSM-Tester:

Handset fails ringer test.

3.3Priority:

........ Mandatory
........ Repair
........ Optional
........ Not Yet Defined
V1.0 Page 8 of 39 ICP CD ST
D. Schnoor
Information and Communication Products
Communication Devices

3.4Repair Documentation

3.4.1Description of procedure:

The connector X5 is connecting the main board of the C25 with the piezo ringer through a two pin cable.
3.4.1.1Diagnosis
Visually check the connector. Watch for bent contacts and dry joints.
3.4.1.2Repair by component change
Resolder dry soldering joints. If the connector is physically damaged use hot air blower or wick to remove defective connector. Avoid excessive heat! Watch surrounding components!
Resolder new connector afterwards.
3.4.1.3Repair by SW-Booting
Not possible!
3.4.1.4Test
Retest handset after repair.

3.4.2List of needed material

3.4.2.1Components
Ringer Connector S25: Part-Number: L36334-Z97-C43
3.4.2.2Jigs and Tools
Hot Air Blower Soldering Iron
V1.0 Page 9 of 39 ICP CD ST
D. Schnoor
Information and Communication Products
Communication Devices
3.4.2.3Special Tools
None
3.4.2.4Working materials
Desolder Wick / Braid Solder Flux

3.4.3Drawings

V1.0 Page 10 of 39 ICP CD ST
D. Schnoor
Figure 1: S25 Board Ringer Connector Side
Figure 2: S25 Ringer Connector (X5) Placement (Top View)
Information and Communication Products
Communication Devices

Bottom Connector (Lumberg)

3.5Affected Units

3.5.1Type: S25

3.5.2Affected IMEIs / Date Codes: All / All

3.5.3Affected SW-Versions: All

3.5.4Fault Code for LSO reporting: 3LUC

3.6Fault Description

3.6.1Fault Symptoms for customers:

Charging problems. Problems with external loudspeaker or microphone when using a car kit. Problems with accessories connected at the bottom connector.

3.6.2Fault Symptom on GSM-Tester:

Testequipment cannot communicate with the handset.

3.7Priority:

........ Mandatory
........ Repair
........ Optional
........ Not Yet Defined
V1.0 Page 11 of 39 ICP CD ST
D. Schnoor
Information and Communication Products
Communication Devices

3.8Repair Documentation

3.8.1Description of procedure:

3.8.1.1Diagnosis
Visually check the bottom connector. Watch for dry joints!
3.8.1.2Repair by component change
Use hot air blower remove defective bottom connector. Avoid excessive heat! Watch surrounding components!
Resolder new bottom connector afterwards.
3.8.1.3Repair by SW-Booting
Not possible!
3.8.1.4Test
Retest handset after repair.

3.8.2List of needed material

3.8.2.1Components
Bottom Connector S25 Part-Number: L36334-Z93-C262
3.8.2.2Jigs and Tools
Hot Air Blower Soldering Iron
3.8.2.3Special Tools
None
V1.0 Page 12 of 39 ICP CD ST
D. Schnoor
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