Siemens C11, C10 Service Manual

Information and Communication

Communication Devices

C10 / C11

Level 2.5

Repair Documentation

V 1.0

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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]

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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

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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.

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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

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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

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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

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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

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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.

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