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Company Confidential
Copyright 2005© Siemens AG
Service Repair Documentation
Release
1.0
Service Repair Documentation
Level 2.5e – C75
Level 2.5e – C75
Date
05.08.2005
ICM MP CCQ GRM T
Department
Page
of
1
37
s Com
Notes to change
New document
Release 1.0

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Table of Contents

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   Summary of Contents for Siemens C75

  • Page 1 Com Company Confidential Copyright 2005© Siemens AG Service Repair Documentation Level 2.5e – C75 Release Date Department Notes to change 05.08.2005 ICM MP CCQ GRM T New document Page Service Repair Documentation Release 1.0 Level 2.5e – C75...
  • Page 2: Table Of Contents

    Com Company Confidential Copyright 2005© Siemens AG Table of Contents: List of available level 2,5e parts C75 Required Equipment for Level 2,5e Required Software for Level 2,5e Radio Part 4.1 B LOCK DIAGRAM PART 4.2 P RF-P OWER UPPLY 4.3 F...
  • Page 3 (X3651) AMERA OCKET 9.5 IRDA (V2650) 9.6 I SIM M NTERFACE ODULE 9.7 IO C ONNECTOR WITH PROTECTION 9.8 V (XG2100) IBRATION OTOR 9.9 DISPLAY 9.10 OARD TO OARD ONNECTOR Page Service Repair Documentation Release 1.0 Level 2.5e – C75...
  • Page 4: List Of Available Level 2,5e Parts C75

    Com Company Confidential Copyright 2005© Siemens AG 1 List of available level 2,5e parts C75 (according to Component Matrix V1.06 - check C-market for updates) Product Chipset Order Number Description CM C1329 L36344-F1225-M12 CAPACITOR 2*2U2 (Cap-Type7) C1330 L36344-F1225-M12 CAPACITOR 2*2U2 (Cap-Type7)
  • Page 5: Required Equipment For Level 2,5e

    GSM-Tester (CMU200 or 4400S incl. Options) PC-incl. Monitor, Keyboard and Mouse Bootadapter 2000/2002 (L36880-N9241-A200) Adapter cable for Bootadapter due to Lumberg connector (F30032-P226-A1) Troubleshooting Frame A62/A65(C75/A75) (F30032-P405-A1) Power Supply Spectrum Analyser Active RF-Probe incl. Power Supply Oscilloscope incl. Probe RF-Connector (N<>SMA(f))
  • Page 6: Radio Part

    • Transmitter power amplifier with integrated power control circuitry • Frontend-Module including RX-/TX-switch and EGSM900 / DCS1800 / PCS 1900 receiver SAW-filters • Quartz and passive circuitry of the 26MHz VCXO reference oscillator Page Service Repair Documentation Release 1.0 Level 2.5e – C75...
  • Page 7: Block Diagram Rf Part

    BRIGHT. The voltage regulator is activated as well as deactivated via VCXOEN_UC provided by the (Functional F23) SGOLDlite. The temporary deactivation is used to extend the stand by time. Page Service Repair Documentation Release 1.0 Level 2.5e – C75...
  • Page 8: Frequency Generation

    Copyright 2005© Siemens AG 4.3 Frequency generation The C75 mobile is using a reference frequency of 26MHz. The generation of the 26MHz signal is done via a VCO (Z950). TP (test point) of the 26MHz signal is the TP 820...
  • Page 9 LO1 and the 26MHz reference Signal. The division ratio of the dividers is programmed by the SGOLDlite, according to the network channel requirements. Page Service Repair Documentation Release 1.0 Level 2.5e – C75...
  • Page 10 Com Company Confidential Copyright 2005© Siemens AG Matrix to calculate the TX and RX frequencies C75: Band RX / TX Channels RF frequencies LO1 frequency IF freq. EGSM 900 Receive: 0..124 935,0 - 959,8 MHz LO1 = 4*RF EGSM 900 Transmit: 0..124...
  • Page 11: Receiver

    From the antenna switch, up to the demodulator the received signal passes the following blocks to get the demodulated baseband signals for the SGOLDlite: Filter Demodulator D903 Bright(D903) The required voltage VDD_BRIGHT is provided by the ASIC D1300 Page Service Repair Documentation Release 1.0 Level 2.5e – C75...
  • Page 12: Transmitter

    Bright. The TxVCO which is realized inside the Bright chip generates the GSMK modulated frequency. Filter TxVCO Modulator Bright(D903) The required voltage VDD_BRIGHT is provided by the ASIC D1300 Page Service Repair Documentation Release 1.0 Level 2.5e – C75...
  • Page 13: Bright Ic Overview

    Com Company Confidential Copyright 2005© Siemens AG 4.6 Bright IC Overview BRIGHT 6E IC Overview Page Service Repair Documentation Release 1.0 Level 2.5e – C75...
  • Page 14 Com Company Confidential Copyright 2005© Siemens AG IC top view (ball overview) Page Service Repair Documentation Release 1.0 Level 2.5e – C75...
  • Page 15: Antenna Switch (electrical/mechanical)

    Copyright 2005© Siemens AG 4.7 Antenna switch (electrical/mechanical) Internal/External <> Receiver/Transmitter The C75 mobile have two antenna switches. The mechanical antenna switch for the differentiation between the internal and external antenna. The electrical antenna switch, for the differentiation between the receiving and transmitting signals.
  • Page 16 8 GND 22 GND 9 GND 23 GND 10 GND 24 GND 11 GND 25 GND 12 GND 26 Vsw1 (EGSM900 TX control) 13 GND 27 EGSM900 TX 28 GND Page Service Repair Documentation Release 1.0 Level 2.5e – C75...
  • Page 17: Transmitter: Power Amplifier

    It is then compared with the RF_RAMP1 signal. (Analoq Interface L24) N901 is activated through the signal RF_TXONPA (TDMA Timer A17) The required voltage BATT+ is provided by the battery. Page Service Repair Documentation Release 1.0 Level 2.5e – C75...
  • Page 18: Logic / Control

    Com Company Confidential Copyright 2005© Siemens AG 5 Logic / Control 5.1 Overview Hardware Structure C75 5.2 SGOLDLITE 5.2.1 Digital Baseband Baseband Processor SGOLDlite (PMB8875) S-GOLDliteTM is a GSM single chip mixed signal baseband IC containing all analog and digital functionality of a cellular radio.
  • Page 19 • GMSK Modulator according to GSM-standard 05.04 (5/2000) • Hardware accelerators for equalizer and channel decoding • Advanced static and dynamic power management features including TDMA-Frame synchronous low-power mode and enhanced CPU modes (idle and sleep modes) Page Service Repair Documentation Release 1.0 Level 2.5e – C75...
  • Page 20 – Sleep control in standby mode – RAMs and ROMs in power save mode during standby mode – Additional leakage current reduction in standby mode possible by switching off the power for the TEAKLite subsystem. Page Service Repair Documentation Release 1.0 Level 2.5e – C75...
  • Page 21 • mandatory sub-functions like – discontinuous transmission, – voice activity detection, VAD – background noise calculation • generation of tone and side tone • hands-free functions (acoustic echo cancellation, noise-reduction) • support for voice memo Page Service Repair Documentation Release 1.0 Level 2.5e – C75...
  • Page 22: Sdram

    During charging it will be done after the TX time slot. 5.2.2 SDRAM Memory for volatile data. SDRAM= synchronous High data rate Dynamic RAM Memory Size: 64 Mbit Data Bus: 16 Bit Frequency: 105 MHz Power supply: 1.8 V Page Service Repair Documentation Release 1.0 Level 2.5e – C75...
  • Page 23: Flash

    - an Active Matrix Liquid Crystal Display Panel, 1.8”, 132x176 dots, 262k colours - a display controller mounted on the display - a light guide with 4 white LED’s -a FPC with all passive components - an electrical interface 10-pin spring connector Page Service Repair Documentation Release 1.0 Level 2.5e – C75...
  • Page 24: Camera, Display Asic

    IrDA). As a Low-Power-Device, the infrared data interface has a transmission range of at least: • 20cm to other Low-Power-Devices and • 30cm to Standard-Devices It is not possible to use the Bluetooth and the IRDA interface at the same time. Page Service Repair Documentation Release 1.0 Level 2.5e – C75...
  • Page 25: Power Supply

    ASIC hardware can override/interrupt the charging in the case of over voltage of the battery Page Service Repair Documentation Release 1.0 Level 2.5e – C75...
  • Page 26 (charger) is detected with a supply voltage above 6.4 Volt by the ASIC ASIC. The level of charge current is only limited by the charger. Page Service Repair Documentation Release 1.0 Level 2.5e – C75...
  • Page 27 Vibra) the SSC is used. TWI interface TWI ( two wire interface) is an I2C 2 wire interface with the signals Clock (I2C_CLK) data line (I2C_DAT) and the interrupt (PM_INT). Page Service Repair Documentation Release 1.0 Level 2.5e – C75...
  • Page 28: Illumination

    6 high-brightness LEDs (colour: white, type: top-shooter, driven by 5 mA / LED). b) Display The 4 serial LEDs for the display are supplied by one constant current source, to ensure the same brigthness and colour of the white backlight. Page Service Repair Documentation Release 1.0 Level 2.5e – C75...
  • Page 29: Interfaces

    Com Company Confidential Copyright 2005© Siemens AG 9 Interfaces 9.1 Microphone (XG1901) Name IN/OUT Remarks MIC1A Microphone power supply. The same line carries the low frequency speech signal. MIC1B GND_MIC Page Service Repair Documentation Release 1.0 Level 2.5e – C75...
  • Page 30: Loudspeaker (xg1702-xg1703)

    2nd connection to the internal earpiece. Earpiece can be switched off in the case of accessory operation. 9.3 Battery (X1400) Name Remarks BATT+ Positive battery pole AKKU_TYP Recognition of battery/supplier Ground Page Service Repair Documentation Release 1.0 Level 2.5e – C75...
  • Page 31 Pixel data line PIXEL_DATA5 Pixel data line PIXEL_DATA4 Pixel data line PIXEL_DATA3 Pixel data line PIXEL_DATA2 Pixel data line PIXEL_DATA1 Pixel data line PIXEL_DATA0 Pixel data line DVDD_CAMERA Voltage supply for camera Page Service Repair Documentation Release 1.0 Level 2.5e – C75...
  • Page 32 Pin Name IN/OUT Remarks SIM_CLK Pulse for chipcard. The SIM is controlled directly from the SGOLD. SIM_RST Reset for chipcard SIM_IO Data pin for chipcard VDD_SIM Switchable power supply for chipcard; Page Service Repair Documentation Release 1.0 Level 2.5e – C75...
  • Page 33 STEREO1_OUT and STEREO2_OUT differential mode STEREO2_OUT Analog O driving ext. right to PHANTOM_BUF_OUT with mono- headset STEREO1_OUT and STEREO2_OUT differential mode GND_MIC Analog I for ext. microphone MICEA_AC Analog I External microphone Page Service Repair Documentation Release 1.0 Level 2.5e – C75...
  • Page 34 Com Company Confidential Copyright 2005© Siemens AG ESD Protection with EMI filter and USB Switch Application schematic Page Service Repair Documentation Release 1.0 Level 2.5e – C75...
  • Page 35 5-channel filter with over-voltage and ESD Protection array which is designed to provide filtering of undesired RF signals in the 800-4000MHz frequency band Additionally Z1500 contains diodes protect downstream components from Electrostatic Discharge (ESD) voltages Page Service Repair Documentation Release 1.0 Level 2.5e – C75...
  • Page 36 DISPLAY _SYNC Tearing pin (synchronization of display refresh and data transmission) DISPLAY_CLK Serial Clock DISPLAY _DAT Serial Data 2.9V Power supply V Power supply GND VBOOST Anode LED LIGHT_DISP Cathode LED Page Service Repair Documentation Release 1.0 Level 2.5e – C75...
  • Page 37 The keyboard is connected via an inter board connector (X2705). The lines KPOUT0 – KPOUT2 and KPIN0 – KPIN4 are connected with the SGOLDLITE. KB_ON_OFF is used for the ON/OFF switch. Page Service Repair Documentation Release 1.0 Level 2.5e – C75...

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