Siemens S8 GSM, S6 Power GSM, E10 Service Manual

Information and Communication

Communication Devices

E10 / S6 Power GSM /S8 GSM

Level 2.5

Repair Documentation

V 1.2

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Information and Communication

Communication Devices

Table of Contents:

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

2 VCXO

...................................................................................................................................................................................3

3 FUSE 1A

...................................................................................................................................................................................8

4 FUSE 0.25 A

.................................................................................................................................................................................12

5 MOLEX CONNECTOR

.................................................................................................................................................................................16

6 RINGER

.................................................................................................................................................................................20

1Introduction

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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.

The E10 and the S6 Power GSM are both handsets for GSM-900. Internally they are almost
identical but the form factors of the boards are different.

Note: In some countries the S6 Power GSM is called S6 Classic!

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]

2VCXO

2.1Affected Units

2.1.1Type: E10 / S6 Power GSM

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2.1.2Affected IMEIs / Date Codes: All / All

2.1.3Affected SW-Versions: All

2.1.4Fault Code for LSO reporting: 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 VCXO (Voltage Controlled Crystal 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.

2.3Priority:

 ........ Mandatory

 ........ Repair

 ........ Optional

 ........ Not Yet Defined

2.4Repair Documentation

2.4.1Description of procedure:

2.4.1.1Diagnosis

Check the output frequency of the VCXO using the level-2 testing
program for E10 / S6 Power GSM.
Switch off the „CMD in Use“ option in the S611.INI file and restart

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Information and Communication

Communication Devices

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 VCXO has to be
replaced.

2.4.1.2Repair by component change

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

Resolder new VCXO afterwards.

2.4.1.3Repair by SW-Booting

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

VCXO
Part-Number: L36145-G300-Y19

2.4.2.2 Jigs and Tools

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Hot Air Blower
Soldering Iron

2.4.2.3Special Tools

None

2.4.2.4Working materials

Desolder Wick / Braid
Solder

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Communication Devices

2.4.3Drawings

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Figure 1: E10 / S6 Power GSM Board VCXO Side

Figure 2: VCXO (Z601) Placement (Top View)