Siemens C11, C10 Service Manual

Information and Communication

Communication Devices

C10 / C11

Level 2.5

Repair Documentation

V 1.0

V1.0 Page 1 of 33 ICP CD ST

D. Schnoor

08/98

Information and Communication

Communication Devices

1Introduction

The product familiy C1x consists of C10 (GSM-900), C11 (GSM-1800) and C12
(GSM-1900). This manual only deals with the C10 and the C11. If parts or repairs are
identical instead of C10 and C11 only C1x is mentioned.

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.: [phone]
Fax: [phone]
e-mail: [e-mail]

V1.0 Page 2 of 33 ICP CD ST

D. Schnoor

08/98

Information and Communication

Communication Devices

Table of Contents:

1 INTRODUCTION................................................................................................................................................2

2 13 MHZ OSCILLATOR

...................................................................................................................................................................................4

3 FUSE 1A

...................................................................................................................................................................................9

4 RINGER CONNECTOR

.................................................................................................................................................................................15

5 MOLEX CONNECTOR

.................................................................................................................................................................................21

6 18ΜH COIL

.................................................................................................................................................................................25

7 ANTENNA SPRING

.................................................................................................................................................................................30

V1.0 Page 3 of 33 ICP CD ST

D. Schnoor

08/98

Information and Communication

Communication Devices

213 MHz oscillator

2.1Affected Units

2.1.1Type: C10, C11 (different components!)

2.1.2Affected IMEIs / Date Codes: All / All

2.1.3Affected SW-Versions: All

2.1.4Fault Code for LSO reporting: C10: 3OSC

C11: 3VCX

2.2Fault Description

2.2.1Fault Symptoms for customers:

Network Search
Handset not logging into network

2.2.2Fault Symptom on GSM-Tester:

Frequency error in synchronized mode >90 Hz
No location update possible

The Oscillator is responsible for generating the 13 MHz reference frequency of the handset.
If it is defective, the handset cannot synchronize to the base station anymore.

V1.0 Page 4 of 33 ICP CD ST

D. Schnoor

08/98

Information and Communication

Communication Devices

2.3Priority:

 ........ Mandatory

 ........ Repair

 ........ Optional

 ........ Not Yet Defined

2.4Repair Documentation

2.4.1Description of procedure:

For the C10 three different 13MHz oscillators can be used: A TCXO, a

VCXO (Both are called Z601 in the placement diagram) and a normal
13 MHz oscillator (Z602).
The production status handsets all have a normal 13 MHz oscillator
placed, no VCXO or TCXO is used.

For the C11 only a VCXO is used.

2.4.1.1Diagnosis

Check the output frequency of the oscillator using the level-2 testing
program for C10 / C11.
Set the „Simulator“ option in the S611.INI file to 0 and restart
the program. Start the test. When the program says „Check power and
phase of external antenna with your GSM-Tester“, switch the CMD to
„LOCAL“ mode and enter the „MODULE TEST“.
On the CMD display you can see the frequency error of the handset.
(Make sure that the CMD is on channel 124, power level 5!)

If the frequency error is higher than 2kHz, the oscillator has to be
replaced.

2.4.1.2Repair by component change

Use hot air blower to remove defective oscillator.
Avoid excessive heat!
Watch surrounding components!

Resolder new oscillator afterwards.

2.4.1.3Repair by SW-Booting

V1.0 Page 5 of 33 ICP CD ST

D. Schnoor

08/98

Information and Communication

Communication Devices

Not possible!

2.4.1.4Test

Retest handset after repair as described above.
The frequency error must now be < 2kHz.

2.4.2List of needed material

2.4.2.1Components

C10: 13 MHz oscillator

Part-Number: L36145-F220-Y2

C11: VCXO
Part-Number: L36145-G300-Y21

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 33 ICP CD ST

D. Schnoor

08/98

Information and Communication

Communication Devices

V1.0 Page 7 of 33 ICP CD ST

D. Schnoor

08/98

Figure 1: C10 Board 13 MHz Oscillator Side (Top View)

Figure 2: C10 13 MHz Oscillator Placement (Z602) (Top View)

Information and Communication

Communication Devices

V1.0 Page 8 of 33 ICP CD ST

D. Schnoor

08/98

Figure 3: C11 Board VCXO Side (Top View)

Figure 4: C11 VCXO (Z601) Placement (Top View)

Information and Communication

Communication Devices

3Fuse 1A

3.1Affected Units

3.1.1Type: C10, C11

3.1.2Affected IMEIs / Date Codes: All / All

3.1.3Affected SW-Versions: All

3.1.4Fault Code for LSO reporting: C10, C11: 3FU1

3.2Fault Description

3.2.1Fault Symptoms for customers:

Battery charging not possible

3.2.2Fault Symptom on GSM-Tester:

This fault cannot be detected with a GSM-Tester

V1.0 Page 9 of 33 ICP CD ST

D. Schnoor

08/98

Information and Communication

Communication Devices

3.3Priority:

 ........ Mandatory

 ........ Repair

 ........ Optional

 ........ Not Yet Defined

3.4Repair Documentation

3.4.1Description of procedure:

3.4.1.1Diagnosis

Check the status of the fuse by measuring its resistance with
a multimeter. The fuse is defective if the resistance is higher than 10
ohms.

3.4.1.2Repair by component change

Use soldering iron to remove defective fuse.
Avoid excessive heat!
Watch surrounding components!

Resolder new fuse afterwards.

3.4.1.3Repair by SW-Booting

Not possible!

3.4.1.4Test

Retest handset after repair as described above.

V1.0 Page 10 of 33 ICP CD ST

D. Schnoor

08/98

Information and Communication

Communication Devices

The resistance must now be close to zero.

3.4.2List of needed material

3.4.2.1Components

Fuse
Part-Number: L36145-A820-Y7

3.4.2.2Jigs and Tools

Soldering Iron

3.4.2.3Special Tools

Multimeter

3.4.2.4Working materials

Desolder Wick / Braid
Solder

V1.0 Page 11 of 33 ICP CD ST

D. Schnoor

08/98

Information and Communication

Communication Devices

3.4.3Drawings

V1.0 Page 12 of 33 ICP CD ST

D. Schnoor

08/98

Figure 1: C10 Board 1A Fuse Side

Figure 2: C10 1A Fuse (F901) Placement (Top View)

Information and Communication

Communication Devices

V1.0 Page 13 of 33 ICP CD ST

D. Schnoor

08/98

Information and Communication

Communication Devices

V1.0 Page 14 of 33 ICP CD ST

D. Schnoor

08/98

Figure 3: C11 Board 1A Fuse Side

Figure 4: C11 1A Fuse (F901) Placement (Top View)

Information and Communication

Communication Devices

4Ringer Connector

4.1Affected Units

4.1.1Type: C10, C11

4.1.2Affected IMEIs / Date Codes: All / All

4.1.3Affected SW-Versions: All

4.1.4 Fault Code for LSO reporting: C10, C11: 3RIC

4.2Fault Description

4.2.1Fault Symptoms for customers:

Problems with the handset ringer. No ringer tone
audible.

4.2.2Fault Symptom on GSM-Tester:

Handset fails ringer test.

4.3Priority:

 ........ Mandatory

 ........ Repair

 ........ Optional

 ........ Not Yet Defined

V1.0 Page 15 of 33 ICP CD ST

D. Schnoor

08/98

Information and Communication

Communication Devices

4.4Repair Documentation

4.4.1Description of procedure:

The connector B1 is connecting the main board of the C1x with the piezo
ringer through a two pin cable.

4.4.1.1Diagnosis

Visually check the connector. Watch for bent contacts and dry joints.

4.4.1.2Repair 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.

4.4.1.3Repair by SW-Booting

Not possible!

4.4.1.4Test

Retest handset after repair.

V1.0 Page 16 of 33 ICP CD ST

D. Schnoor

08/98

Information and Communication

Communication Devices

4.4.2List of needed material

4.4.2.1Components

Ringer Connector C1x:
Part-Number: L36334-Z97-C43

4.4.2.2Jigs and Tools

Hot Air Blower
Soldering Iron

4.4.2.3Special Tools

None

4.4.2.4Working materials

Desolder Wick / Braid
Solder
Flux

V1.0 Page 17 of 33 ICP CD ST

D. Schnoor

08/98

Information and Communication

Communication Devices

4.4.3Drawings

V1.0 Page 18 of 33 ICP CD ST

D. Schnoor

08/98

Figure 1: C10 Board Ringer Connector Side

Information and Communication

Communication Devices

V1.0 Page 19 of 33 ICP CD ST

D. Schnoor

08/98

Figure 2: C10 Ringer Connector Placement (Top View)

Figure 3: C11 Board Ringer Connector Side

Information and Communication

Communication Devices

V1.0 Page 20 of 33 ICP CD ST

D. Schnoor

08/98

Figure 4: C11 Ringer Connector Placement (Top View)

Information and Communication

Communication Devices

5Molex Connector

5.1Affected Units

5.1.1Type: C10, C11

5.1.2Affected IMEIs / Date Codes: All / All

5.1.3Affected SW-Versions: All

5.1.4Fault Code for LSO reporting: C10, C11: 3MOC

5.2Fault Description

5.2.1Fault Symptoms for customers:

Battery charging not possible.
Problems with external loudspeaker or microphone
when using a car kit.
Network search when using the external antenna.
Problems with data accessories.

5.2.2Fault Symptom on GSM-Tester:

Output power problems on the external antenna only

5.3Priority:

 ........ Mandatory

 ........ Repair

 ........ Optional

 ........ Not Yet Defined

V1.0 Page 21 of 33 ICP CD ST

D. Schnoor

08/98

Information and Communication

Communication Devices

5.4Repair Documentation

5.4.1Description of procedure:

5.4.1.1Diagnosis

Visually check the bottom connector. Watch for dry joints or a broken
charging pin.

5.4.1.2Repair by component change

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

Resolder new bottom connector 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

Bottom Connector C10, C11
Part-Number: L36334-Z93-C244

5.4.2.2Jigs and Tools

Hot Air Blower
Soldering Iron

V1.0 Page 22 of 33 ICP CD ST

D. Schnoor

08/98

Information and Communication

Communication Devices

5.4.2.3Special Tools

None

5.4.2.4Working materials

Desolder Wick / Braid
Solder

5.4.3Drawings

V1.0 Page 23 of 33 ICP CD ST

D. Schnoor

08/98

Figure 1: C10 Board Bottom Connector Side

Information and Communication

Communication Devices

V1.0 Page 24 of 33 ICP CD ST

D. Schnoor

08/98

Figure 2: C11 Board Bottom Connector Side

Figure 3: C1x Bottom Connector (X203) Placement (Top View)

Information and Communication

Communication Devices

618µH Coil

6.1Affected Units

6.1.1Type: C10, C11

6.1.2Affected IMEIs / Date Codes: All / All

6.1.3Affected SW-Versions: All

6.1.4Fault Code for LSO reporting: C10, C11: 3COI

6.2Fault Description

6.2.1Fault Symptoms for customers:

Loud humming noise in loudspeaker.

6.2.2Fault Symptom on GSM-Tester:

Handset fails with loud humming noise in echo loop.

6.3Priority:

 ........ Mandatory

 ........ Repair

 ........ Optional

V1.0 Page 25 of 33 ICP CD ST

D. Schnoor

08/98

Information and Communication

Communication Devices

 ........ Not Yet Defined

6.4Repair Documentation

6.4.1Description of procedure:

6.4.1.1Diagnosis

The 18µH coil is used in the step up converter which is generating a

6.0 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 C1x 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.

6.4.1.2Repair by component change

Use hot air to remove defective coil.
Avoid excessive heat!
Watch surrounding components!!

Resolder new coil afterwards

6.4.1.3Repair by SW-Booting

Not possible!

6.4.1.4Test

Retest handset after repair by checking the audio quality with the echo
loop of the testprogram.

V1.0 Page 26 of 33 ICP CD ST

D. Schnoor

08/98

Information and Communication

Communication Devices

6.4.2List of needed material

6.4.2.1Components 18µH Coil

Part-Number: L36151-F5183-M

6.4.2.2Jigs and Tools

Soldering Iron
Hot Air Blower

6.4.2.3Special Tools

None

6.4.2.4Working materials

Desolder Wick / Braid
Solder

V1.0 Page 27 of 33 ICP CD ST

D. Schnoor

08/98

Information and Communication

Communication Devices

6.4.3Drawings

V1.0 Page 28 of 33 ICP CD ST

D. Schnoor

08/98

Figure 1: C10 Board 18µH Coil (L201) Side

Figure 2: C10 18µH Coil (L201) Placement (Top View)

Information and Communication

Communication Devices

V1.0 Page 29 of 33 ICP CD ST

D. Schnoor

08/98

Figure 3: C11 Board 18µH Coil (L201) Side

Figure 4: C11 18µH Coil (L201) Placement (Top View)

Information and Communication

Communication Devices

7Antenna Spring

7.1Affected Units

7.1.1Type: C10, C11

7.1.2Affected IMEIs / Date Codes: All / All

7.1.3Affected SW-Versions: All

7.1.4Fault Code for LSO reporting: C10, C11: 3ANS

7.2Fault Description

7.2.1Fault Symptoms for customers:

Network Search.
Handset drops calls.

7.2.2Fault Symptom on GSM-Tester:

Power problems on the internal antenna of the handset
only.

7.3Priority:

 ........ Mandatory

 ........ Repair

 ........ Optional

 ........ Not Yet Defined

V1.0 Page 30 of 33 ICP CD ST

D. Schnoor

08/98

Information and Communication

Communication Devices

7.4Repair Documentation

7.4.1Description of procedure:

The antennaspring connects the main board with the internal antenna
of the handset.

7.4.1.1Diagnosis

Visually check the status of the spring. Bent or oxidated springs have
to be replaced.

7.4.1.2Repair by component change

Use soldering iron to remove defective spring.
Avoid excessive heat!
Watch surrounding components!

Resolder new spring 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

Antenna Spring C10, C11
Part-Number: L36158-A26-C430

7.4.2.2Jigs and Tools

Hot Air Blower
Soldering Iron

V1.0 Page 31 of 33 ICP CD ST

D. Schnoor

08/98

Information and Communication

Communication Devices

7.4.2.3Special Tools

None

7.4.2.4Working materials

Desolder Wick / Braid
Solder

7.4.3Drawings

V1.0 Page 32 of 33 ICP CD ST

D. Schnoor

08/98

Figure 1: C10 Board Antenna Spring Side

Figure 2: C10 Antenna Spring (X751) Placement (Top View)

Figure 3: C11 Board Antenna Spring Side

Information and Communication

Communication Devices

V1.0 Page 33 of 33 ICP CD ST

D. Schnoor

08/98

Figure 4: C11 Antenna Spring (X751) Placement (Top View)