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Table Of Contents - Siemens A55 Repair Documentation

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Table of Contents:

1
LIST OF AVAILABLE LEVEL 2,5E PARTS C55 IFX ......................................... 4
2
REQUIRED EQUIPMENT FOR LEVEL 2,5E ...................................................... 5
3
REQUIRED SOFTWARE FOR LEVEL 2,5E C55 IFX......................................... 5
4
RADIO PART DESCRIPTION ............................................................................. 6
4.1
Introduction..................................................................................................... 6
4.2
Power Supply RF-Part .................................................................................... 7
4.3
Frequency generation .................................................................................... 7
4.3.1
Synthesizer: The discrete VCXO (26MHz)...........................................................................7
4.3.2
Synthesizer: LO1 ..................................................................................................................8
4.4
C55) 10
4.5
Frontendmodul (Electrical Antenna Switch) .............................................. 10
4.6
Receiver......................................................................................................... 11
4.6.1
Receiver: EGSM900/GSM1800 - Filter to Demodulator ...................................................11
4.6.2
IC Overview ........................................................................................................................13
4.7
Transmitter.................................................................................................... 15
4.7.1
Transmitter: Modulator and Limited Amplifier ....................................................................15
4.7.2
Transmitter: and Power Amplifier .......................................................................................16
5
LOGIC / CONTROL........................................................................................... 17
Overview of Hardware Structure ................................................................. 17
5.1
5.1.1
Logic Block Diagram ..........................................................................................................17
5.1.2
Block Diagram C55 IFX Control Part .................................................................................17
5.1.3
EGOLD+ .............................................................................................................................18
5.1.4
SRAM .................................................................................................................................22
5.1.5
FLASH ................................................................................................................................22
5.1.6
SIM .....................................................................................................................................22
5.1.7
Vibration Motor ...................................................................................................................23
6
POWER SUPPLY.............................................................................................. 23
6.1
Power Supply ASIC ...................................................................................... 23
6.1.1
Power Supply Operating modes: .......................................................................................25
6.1.2
Power Supply Functions:....................................................................................................26
6.2
Battery ........................................................................................................... 33
6.3
Charging Concept......................................................................................... 34
V 1.10
A52/A55/C55 IFX
Page 2of 45
Company Confidential © Copyright Siemens AG
ICM MP CCQ GRM
08/03

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