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Information and Communication Products
Communication Devices
S25(88)
Level 2.5
Repair Documentation
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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
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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
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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.
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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!
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From Power
Amplifier/ To
Receiver
To / From
Internal
Antenna
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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
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Figure 2: C25 Antenna Connector Placement (X400) (Top View)
Figure 1: S25 Board Antenna Connector Side (Top View)
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Figure 2: S25 Antenna Connector Side (Top View)
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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
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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
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3.4.2.3Special Tools
None
3.4.2.4Working materials
Desolder Wick / Braid
Solder
Flux
3.4.3Drawings
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Figure 1: S25 Board Ringer Connector Side
Figure 2: S25 Ringer Connector (X5) Placement (Top View)
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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
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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
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3.8.2.4Working materials
Desolder Wick / Braid
Solder
3.8.3Drawings
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Figure 1: S25 Board Bottom Connector Side
Figure 2: S25 Bottom Connector (X4) Placement (Top View)
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418µH Coil
4.1Affected Units
4.1.1Type: S25
4.1.2Affected IMEIs / Date Codes: All / All
4.1.3Affected SW-Versions: All
4.1.4Fault Code for LSO reporting: 3COI
4.2Fault Description
4.2.1Fault Symptoms for customers:
Loud humming noise in loudspeaker.
4.2.2Fault Symptom on GSM-Tester:
Handset fails with loud humming noise in echo loop.
4.3Priority:
........ Mandatory
........ Repair
........ Optional
........ Not Yet Defined
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4.4Repair Documentation
4.4.1Description of procedure:
4.4.1.1Diagnosis
The 18µH coil is used in the step up converter which is generating a
5.4 V supply voltage for the power amplifier out of the 2.8V battery
voltage.
If the coil is mechanically damaged (broken) it produces heavy
interference with the acoustical elements of the S25 resulting in a loud
humming noise in the earpiece.
A broken coil can easily be diagnosed by trying to move it with two
fingers. If it moves, the core is broken and the coil has to be
replaced.
4.4.1.2Repair by component change
Use hot air to remove defective coil.
Avoid excessive heat!
Watch surrounding components!!
Resolder new coil afterwards
4.4.1.3Repair by SW-Booting
Not possible!
4.4.1.4Test
Retest handset after repair by checking the audio quality with the echo
loop of the testprogram.
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4.4.2List of needed material
4.4.2.1Components 18µH Coil
Part-Number: L36151-F5183-M
4.4.2.2Jigs and Tools
Soldering Iron
Hot Air Blower
4.4.2.3Special Tools
None
4.4.2.4Working materials
Desolder Wick / Braid
Solder
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4.4.3Drawings
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Figure 1: S25 Board 18µH Coil (L201) Side
Figure 2: S25 18µH Coil (L1) Placement (Top View)
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5Antenna Spring
5.1Affected Units
5.1.1Type: S25
5.1.2Affected IMEIs / Date Codes: All / All
5.1.3Affected SW-Versions: All
5.1.4Fault Code for LSO reporting: 3ANS
5.2Fault Description
5.2.1Fault Symptoms for customers:
Network Search.
Handset drops calls.
5.2.2Fault Symptom on GSM-Tester:
Power problems on the internal antenna of the handset
only.
5.3Priority:
........ Mandatory
........ Repair
........ Optional
........ Not Yet Defined
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5.4Repair Documentation
5.4.1Description of procedure:
The antennaspring connects the main board with the internal antenna
of the handset.
5.4.1.1Diagnosis
Visually check the status of the spring. Bent or oxidated springs have
to be replaced.
5.4.1.2Repair by component change
Use soldering iron to remove defective spring.
Avoid excessive heat!
Watch surrounding components!
Resolder new spring afterwards.
5.4.1.3Repair by SW-Booting
Not possible!
5.4.1.4Test
Retest handset after repair.
5.4.2List of needed material
5.4.2.1Components
Antenna Spring S25
Part-Number: L36158-A25-C9
5.4.2.2Jigs and Tools
Hot Air Blower
Soldering Iron
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5.4.2.3Special Tools
None
5.4.2.4Working materials
Desolder Wick / Braid
Solder
5.4.3Drawings
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Figure 1: S25 Board Antenna Spring Side
Figure 2: S25 Antenna Spring (X401) Placement (Top View)
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61,5 A Fuse
6.1Affected Units
6.1.1Type: S25
6.1.2Affected IMEIs / Date Codes: All / All
6.1.3Affected SW-Versions: All
6.1.4Fault Code for LSO reporting: 3FU1
6.2Fault Description
6.2.1Fault Symptoms for customers:
Battery charging doesn’t work.
6.2.2Fault Symptom on GSM-Tester:
This fault cannot be detected with a GSM-Tester.
6.3Priority:
........ Mandatory
........ Repair
........ Optional
........ Not Yet Defined
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6.4Repair Documentation
6.4.1Description of procedure:
6.4.1.1Diagnosis
Simply measure the resistance of the fuse with a multimeter. Open
connection means the fuse is defective. Otherwise it should be close
to zero ohms.
6.4.1.2Repair by component change
Use soldering iron to resolder dry joints or use hot air blower to
remove defective fuse.
Avoid excessive heat!
Watch surrounding components!
Resolder new fuse afterwards.
6.4.1.3Repair by SW-Booting
Not possible!
6.4.1.4Test
Retest handset after repair.
6.4.2List of needed material
6.4.2.1Components
1,5 A fuse S25:
Part-Number: L36145-A820-Y12
6.4.2.2Jigs and Tools
Hot Air Blower
Soldering Iron
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6.4.2.3Special Tools
None
6.4.2.4Working materials
Desolder Wick / Braid
Solder
6.4.3Drawings
Figure 2: S25 Fuse (F1) Placement (Top View)
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Figure 1: S25 Board 1,5 A Fuse Side
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7Cardreader
7.1Affected Units
7.1.1Type: S25
7.1.2Affected IMEIs / Date Codes: All / All
7.1.3Affected SW-Versions: All
7.1.4Fault Code for LSO reporting: 3REA
7.2Fault Description
7.2.1Fault Symptoms for customers:
Handset does not accept Simcard
7.2.2Fault Symptom on GSM-Tester:
This fault cannot be detected with a GSM-Tester.
7.3Priority:
........ Mandatory
........ Repair
........ Optional
........ Not Yet Defined
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7.4Repair Documentation
7.4.1Description of procedure:
7.4.1.1Diagnosis
Visually check the SIM-Card reader. Look for dry joints or mechanical
problems.
7.4.1.2Repair by component change
Use soldering iron to resolder dry joints or use hot air blower to
remove defective reader.
Avoid excessive heat!
Watch surrounding components!
Resolder new reader afterwards.
7.4.1.3Repair by SW-Booting
Not possible!
7.4.1.4Test
Retest handset after repair.
7.4.2List of needed material
7.4.2.1Components
SIM-Card reader S25:
Part-Number: L36334-Z97-C51
7.4.2.2Jigs and Tools
Hot Air Blower
Soldering Iron
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7.4.2.3Special Tools
None
7.4.2.4Working materials
Desolder Wick / Braid
Solder
7.4.3Drawings
Figure 2: S25 Cardreader Placement (Top View)
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Figure 1: S25 Board Cardreader Side
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8Vibraconnector
8.1Affected Units
8.1.1Type: S25
8.1.2Affected IMEIs / Date Codes: All / All
8.1.3Affected SW-Versions: All
8.1.4Fault Code for LSO reporting: 3VIC
8.2Fault Description
8.2.1Fault Symptoms for customers:
Vibrator function does not work
8.2.2Fault Symptom on GSM-Tester:
This fault cannot be detected with a GSM-Tester.
8.3Priority:
........ Mandatory
........ Repair
........ Optional
........ Not Yet Defined
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8.4Repair Documentation
8.4.1Description of procedure:
8.4.1.1Diagnosis
Visually check the Vibramotor connector.
8.4.1.2Repair by component change
Use soldering iron to resolder dry joints or use hot air blower to
remove defective connector.
Avoid excessive heat!
Watch surrounding components!
Resolder new connector afterwards.
8.4.1.3Repair by SW-Booting
Not possible!
8.4.1.4Test
Retest handset after repair.
8.4.2List of needed material
8.4.2.1Components
Vibraconnector S25:
Part-Number: L36334-Z93-C268
8.4.2.2Jigs and Tools
Hot Air Blower
Soldering Iron
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8.4.2.3Special Tools
None
8.4.2.4Working materials
Desolder Wick / Braid
Solder
8.4.3Drawings
Figure 2: S25 Vibraconnector Placement (Top View)
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Figure 1: S25 Board Vibraconnector Side
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9Sideswitch MMI
9.1Affected Units
9.1.1Type: S25
9.1.2Affected IMEIs / Date Codes: All / All
9.1.3Affected SW-Versions: All
9.1.4Fault Code for LSO reporting: 3SSW
9.2Fault Description
9.2.1Fault Symptoms for customers:
Voice memo or up/down button does not work
9.2.2Fault Symptom on GSM-Tester:
The keyboard test fails on the defective button.
9.3Priority:
........ Mandatory
........ Repair
........ Optional
........ Not Yet Defined
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9.4Repair Documentation
9.4.1Description of procedure:
9.4.1.1Diagnosis
Visually check the switches on the MMI board.
9.4.1.2Repair by component change
Use soldering iron to resolder dry joints or use hot air blower to
remove defective switch.
Avoid excessive heat!
Watch surrounding components!
Resolder new switch afterwards.
9.4.1.3Repair by SW-Booting
Not possible!
9.4.1.4Test
Retest handset after repair.
9.4.2List of needed material
9.4.2.1Components
Sideswitch S25:
Part-Number: L36315-.Z77-C194
9.4.2.2Jigs and Tools
Hot Air Blower
Soldering Iron
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9.4.2.3Special Tools
None
9.4.2.4Working materials
Desolder Wick / Braid
Solder
9.4.3Drawings
Figure 2: S25 Up/Down Switch Placement (Top View)
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Figure 1: S25 MMI Board Sideswitch Side
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Figure 3: S25 Voice Memo Switch Placement (Top View)
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10Connector MMI
10.1Affected Units
10.1.1Type: S25
10.1.2Affected IMEIs / Date Codes: All / All
10.1.3Affected SW-Versions: All
10.1.4Fault Code for LSO reporting: 3MMC
10.2Fault Description
10.2.1Fault Symptoms for customers:
Problems with MMI functions like:
• Display malfunction
• Keyboard malfunction
• Illumination problems
10.2.2Fault Symptom on GSM-Tester:
The keyboard / display test fails.
10.3Priority:
........ Mandatory
........ Repair
........ Optional
........ Not Yet Defined
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10.4Repair Documentation
10.4.1Description of procedure:
10.4.1.1Diagnosis
Visually check the connector on the MMI board. Look for mechanical
damages or dry joints.
10.4.1.2Repair by component change
Use soldering iron to resolder dry joints or use hot air blower to
remove defective connector.
Avoid excessive heat!
Watch surrounding components!
Resolder new connector afterwards.
10.4.1.3Repair by SW-Booting
Not possible!
10.4.1.4Test
Retest handset after repair.
10.4.2List of needed material
10.4.2.1Components
MMI Connctor S25:
Part-Number: L36195-Z26-C626
10.4.2.2Jigs and Tools
Hot Air Blower
Soldering Iron
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10.4.2.3Special Tools
None
10.4.2.4Working materials
Desolder Wick / Braid
Solder
10.4.3Drawings
Figure 2: S25 MMI Connector Placement (Top View)
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Figure 1: S25 MMI Board Sideswitch Side
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