Table Of Contents - Siemens S55 Repair Documentation

Table of Contents:

1 LIST OF AVAILABLE LEVEL 2,5E PARTS S55/S57......................................... 4
2 REQUIRED EQUIPMENT FOR LEVEL 2,5E ...................................................... 5
3 REQUIRED SOFTWARE FOR LEVEL 2,5E S55/S57 ........................................ 5
4 RADIO PART ...................................................................................................... 6
4.1 Power Supply RF-Part .................................................................................... 7
4.2 Frequency generation .................................................................................... 8
4.2.1 Synthesizer: The discrete VCXO (26MHz)...........................................................................8
4.2.2 Synthesizer: LO1 ................................................................................................................10
4.2.3 Synthesizer: LO2 ................................................................................................................12
4.2.4 Synthesizer: PLL ................................................................................................................13
4.3 Antenna switch (electrical/mechanical)...................................................... 14
4.4 Receiver......................................................................................................... 17
4.4.1 Receiver: EGSM900/GSM1800/GSM1900 -Filter to Demodulator ...................................17
4.4.2 IC Overview ........................................................................................................................19
4.5 Transmitter.................................................................................................... 20
4.5.1 Transmitter: Modulator and Up-conversion Loop...............................................................20
4.5.2 Transmitter: Power Amplifier ..............................................................................................21
5 LOGIC / CONTROL........................................................................................... 22
5.1 Overview of Hardware Structure ................................................................. 22
5.1.1 Logic Block Diagram ..........................................................................................................22
5.1.2 Block Diagram S55/S57 Control Part.................................................................................22
5.1.3 EGOLD+ .............................................................................................................................23
5.1.4 SRAM .................................................................................................................................27
5.1.5 FLASH ................................................................................................................................27
5.1.6 SIM .....................................................................................................................................27
5.1.7 Vibration Motor ...................................................................................................................28
6 POWER SUPPLY.............................................................................................. 28
6.1 Power Supply ASIC ...................................................................................... 28
6.1.1 Pinout diagram ...................................................................................................................29
6.1.2 Power Supply Diagram.......................................................................................................30
6.1.3 Power Supply Operating mode: .........................................................................................31
6.1.4 Power Supply Functions:....................................................................................................32
6.2 Battery ........................................................................................................... 34
6.3 Charging Concept......................................................................................... 34
7 INTERFACES.................................................................................................... 38
V1.00
S55/S57
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12/02