Siemens A70 Service Repair Documentation
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Siemens A70 Service Repair Documentation

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s Com
Company Confidential
Copyright 2005© Siemens AG
Service Repair Documentation
Level 2.5e – A70, A75
Release
Date
Department
Notes to change
1.0
06.06.2005
ICM MP CCQ GRM T
New document
Page
of
1
53
TD_Repair_L2.5_A70_A75_R1.0.pdf
Release 1.0

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Summary of Contents for Siemens A70

  • Page 1 Com Company Confidential Copyright 2005© Siemens AG Service Repair Documentation Level 2.5e – A70, A75 Release Date Department Notes to change 06.06.2005 ICM MP CCQ GRM T New document Page TD_Repair_L2.5_A70_A75_R1.0.pdf Release 1.0...

  • Page 2: Table Of Contents

    Com Company Confidential Copyright 2005© Siemens AG Table of Contents: Instruction List of available level 2,5e parts A70 List of available level 2,5e parts A75 Required Equipment for Level 2,5e Required Software for Level 2,5e Radio Part 6.1 B...
  • Page 3 Com Company Confidential Copyright 2005© Siemens AG 10 Interfaces 10.1 (XG220) IBRA 10.2 (XG243) ARPIECE 10.3 ICROPHONE 10.4 (X181) ATTERY 10.5 IO C (X211) (Z211) ONNECTOR WITH PROTECTION 10.6 11 Keyboard Page TD_Repair_L2.5_A70_A75_R1.0.pdf Release 1.0...

  • Page 4: Instruction

    For all activities the international ESD regulations have to be considered. Assembling/disassembling has to be done according to the latest A70, A75 Level 2 repair documentation. It has to be ensured that every repaired mobile Phone is checked according to the latest released General Test Instruction document (both documents are available in the Technical Support section of the C-market).

  • Page 5: List Of Available Level 2,5E Parts A70

    Com Company Confidential Copyright 2005© Siemens AG 2 List of available level 2,5e parts A70 (according to Component Matrix V1.03 - check C-market for updates) Product Chipset Order Number Description CM C204 L36377-F6225-M CAPACITOR 2U2 (Cap-Type4) C230 L36377-F6225-M CAPACITOR 2U2 (Cap-Type4)

  • Page 6: List Of Available Level 2,5E Parts A75

    Com Company Confidential Copyright 2005© Siemens AG 3 List of available level 2,5e parts A75 (according to Component Matrix V1.03 - check C-market for updates) Product Chipset ID Order Number Description CM C165 L36853-C9104-M4 CAPACITOR 100N (Cap-Type2) C200 L36853-C9104-M4...
  • Page 7 Com Company Confidential Copyright 2005© Siemens AG C803 L36853-C9104-M4 CAPACITOR 100N (Cap-Type2) C805 L36853-C9104-M4 CAPACITOR 100N (Cap-Type2) C809 L36853-C9104-M4 CAPACITOR 100N (Cap-Type2) C820 L36853-C9104-M4 CAPACITOR 100N (Cap-Type2) C821 L36853-C9104-M4 CAPACITOR 100N (Cap-Type2) C912 L36853-C9104-M4 CAPACITOR 100N (Cap-Type2) C916 L36377-F6225-M...

  • Page 8: 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(A70/A75) (F30032-P405-A1) Power Supply Spectrum Analyser Active RF-Probe incl. Power Supply Oscilloscope incl. Probe RF-Connector (N<>SMA(f))

  • Page 9: Radio Part

    Com Company Confidential Copyright 2005© Siemens AG 6 Radio Part The radio part is realizes the conversion of the GMSK-HF-signals from the antenna to the baseband and vice versa. In the receiving direction, the signals are split in the I- and Q-component and led to the D/A- converter of the logic part.

  • Page 10: Block Diagram Rf Part

    Com Company Confidential Copyright 2005© Siemens AG 6.1 Block diagram RF part Page TD_Repair_L2.5_A70_A75_R1.0.pdf Release 1.0...

  • Page 11: Power Supply Rf-Part

    6.3 Frequency generation Synthesizer: The discrete VCXO (26MHz) The A70/A75 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 The oscillator output signal 26MHz_RF is directly connected to the BRIGHT IC (ball B9,.
  • Page 12 Com Company Confidential Copyright 2005© Siemens AG Bright 6E VCXO Out EGOLD In To compensate frequency drifts (e.g. caused by temperature) the oscillator frequency is controlled by the (RF_AFC) signal, generated through the internal EGOLDlite (D171 (A10) PLL. Reference for the “EGOLD-PLL” is the base station frequency received via the Frequency Correction Burst.
  • Page 13 Com Company Confidential Copyright 2005© Siemens AG Synthesizer: LO1 First local oscillator (LO1) consists of a PLL and VCO inside Bright (D903) and an internal loop filter RF PLL The frequency-step is 400 kHz in GSM1800 mode and 800kHz in EGSM900 mode due to the internal divider by two for GSM1800 and divider by four for EGSM900.
  • Page 14 Com Company Confidential Copyright 2005© Siemens AG Matrix to calculate the TX and RX frequencies A70/A75: 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 15: Receiver

    Com Company Confidential Copyright 2005© Siemens AG 6.4 Receiver Receiver: Filter to Demodulator The band filters are located inside the frontend module (D902). The filters are centred to the band frequencies. The symmetrical filter output is matched to the LNA input of the Bright .The Bright 6E incorporates three RF LNAs for GSM850/EGSM900, GSM1800 and GSM1900 operation.

  • Page 16: Transmitter

    Com Company Confidential Copyright 2005© Siemens AG 6.5 Transmitter Transmitter: Modulator and Up-conversion Loop The generation of the GMSK-modulated signal in Bright (D903) is based on the principle of up conversion modulation phase locked loop. The incoming IQ-signals from the baseband are mixed with the divided LO2-signal.

  • Page 17: Bright Ic Overview

    Com Company Confidential Copyright 2005© Siemens AG 6.6 Bright IC Overview BRIGHT 6E IC Overview Page TD_Repair_L2.5_A70_A75_R1.0.pdf Release 1.0...
  • Page 18 Com Company Confidential Copyright 2005© Siemens AG IC top view (ball overview) Page TD_Repair_L2.5_A70_A75_R1.0.pdf Release 1.0...

  • Page 19: Antenna Switch (Electrical/Mechanical)

    Copyright 2005© Siemens AG 6.7 Antenna switch (electrical/mechanical) Internal/External <> Receiver/Transmitter The A70 mobile have two antenna switches. The mechanical antenna switch for the differentiation between the internal and external antenna which is used only for RF adjustments on the board.
  • Page 20 Com Company Confidential Copyright 2005© Siemens AG Switching Matrix: select mode Vsw 1 Vsw 2 GSM900/DCS1800/PCS1900 RX EGSM TX high DCS1800/PCS1900 TX High Pin assignment: 1 Antenna 15 PCS1900 RX1 2 GND 16 PCS1900 RX2 3 Vsw2 (DCS1800/PCS1900 TX control)
  • Page 21 Com Company Confidential Copyright 2005© Siemens AG Transmitter: Power Amplifier The output signals (PCN_PA_IN , and GSM_PA_IN) from the TxVCO are led to the power amplifier. The power amplifier is a PA-module N901 from Hitachi. It contains two separate 3- stage amplifier chains GSM850/EGSM900 and GSM1800 / GSM1900 operation.

  • Page 22: Logic / Control

    Com Company Confidential Copyright 2005© Siemens AG 7 Logic / Control 7.1 Overview of Hardware Structure A70 Page TD_Repair_L2.5_A70_A75_R1.0.pdf Release 1.0...

  • Page 23: Overview Of Hardware Structure A75

    Com Company Confidential Copyright 2005© Siemens AG 7.2 Overview of Hardware Structure A75 Page TD_Repair_L2.5_A70_A75_R1.0.pdf Release 1.0...

  • Page 24: Egoldlite

    Com Company Confidential Copyright 2005© Siemens AG 7.3 EGOLDlite Blockdiagram EGOLDlite Page TD_Repair_L2.5_A70_A75_R1.0.pdf Release 1.0...
  • Page 25 Com Company Confidential Copyright 2005© Siemens AG E-GOLDlite is designed as a single chip solution that integrates the digital and mixed signal portions of the baseband. It uses a leading 0.13 µm technology with a core voltage of 1.5 V.
  • Page 26 Com Company Confidential Copyright 2005© Siemens AG The RF transceiver modulates the baseband signal to the desired frequency in the 850 MHz, 900 MHz, 1.8 GHz, and 1.9 GHz band using an I/Q modulator. The E-GOLDlite is able to support quad band applications.
  • Page 27 Com Company Confidential Copyright 2005© Siemens AG C166S MCU The C166S is a 16-bit CMOS (Complementary Metal Oxide Silicon) microcontroller. It contains a CPU (Central Processing Unit) core (the MCU) and a set of peripherals. The architecture of the MCU combines both RISC (Reduced Instruction Set Computing) and CISC (Complex Instruction Set Computing) architecture.
  • Page 28 Com Company Confidential Copyright 2005© Siemens AG • DPRAM: – Internal 16-bit dual port RAM with a 1K x 16-bit size. • SCU (System Control Unit): – Handles the boot and sleep mode of the core – Provides a watchdog timer.
  • Page 29 Com Company Confidential Copyright 2005© Siemens AG The Bit Manipulation Unit consists of a full 36-bit barrel shifter, an exponent unit, a bit-field operation unit, two 36-bit accumulator registers B0 and B1, and a shift value register. The Data Address Arithmetic Unit performs all the address storage and address calculation necessary for accessing the data and program memories.

  • Page 30: Sram

    Memory Size: A70/A75 - 16 Mbit Data Bus: 16Bit 7.5 FLASH Memory Size: A70 - 32 Mbit (4Mbyte) A75 - 64 Mbit (8Mbyte) Data Bus: 16 Bit 7.6 SIM SIM cards with supply voltages of 1.8V and 3V are supported.

  • Page 31: Display Modules

    Copyright 2005© Siemens AG 7.8 Display Modules The A70 display has a resolution of 101x64 pixels b/w. It contains a passive addressed F- STN panel. The A75 display has a resolution of 101x80 pixels with a colour depth of 256 or 4096 colours.
  • Page 32 Com Company Confidential Copyright 2005© Siemens AG The voltage regulator N280 with a nominal output voltage of 2.8V is used. With the signal LIGHT_LCD the illumination for the display is controlled. Required voltage for the display controller VEBU_2.9V. The voltage regulator N308 with a nominal output voltage of 2.9V is used...

  • Page 33: Illumination - Keyboard

    Com Company Confidential Copyright 2005© Siemens AG 7.9 Illumination – Keyboard The LED´s are mounted on the upper side of the PCB. The illumination of the keypad will be done via high-brightness LEDs (colour: amber, type: top-shooter, driven by 6 mA / LED). The light is switched via switches inside the EGOLDlite.

  • Page 34: Acoustic

    Com Company Confidential Copyright 2005© Siemens AG 8 Acoustic he speaker module is designed to provide good performance for mobile handsfree and sound ringer. The speaker module is a system which has a closed front volume with sound- outlets towards the ear of the user. The speaker is partly hidden behind the display to save length of the phone.

  • Page 35: Power Supply Asic

    Com Company Confidential Copyright 2005© Siemens AG 9.1 Power Supply ASIC The power supply ASIC will contain the following functions: Powerdown-Mode Sleep Mode Trickle Charge Mode Power on Reset Digital state machine to control switch on and supervise the uC with a watchdog...
  • Page 36 Com Company Confidential Copyright 2005© Siemens AG Mode Pin Requirements Description Active Mode In this mode, the uC controls the charging block and most of (submode of Full the failure cases. The ASIC can be controlled by the TWI operating mode) interface, interrupts can be sent by the ASIC.
  • Page 37 Com Company Confidential Copyright 2005© Siemens AG Power Supply Functions: Functions Pin Requirements Implementation/Sequence Switching on the ON_OFF, There are 3 different possibilities to switch on the phone by mobile phone ON_OFF2, external pins: VDD_CHARGE VDD_CHARGE with rising edge after POR or high level at...
  • Page 38 Com Company Confidential Copyright 2005© Siemens AG Functions Pin Requirements Implementation/Sequence Voltage Supply REG2 The linear controller is designed for 1.5V (±2%) and a Logics (1,5V) maximum load current of 300 mA. The output voltage can be adjusted to four different values with TWI register by the µC.
  • Page 39 Com Company Confidential Copyright 2005© Siemens AG Functions Pin Requirements Implementation/Sequence Voltage Supply VLPREG The linear controller is designed for 2.00V(min. 1.9V, max. 2.1V) and a maximum load current of 1 mA. The output voltage can be adjusted to four different values with TWI register by the µC.
  • Page 40 Com Company Confidential Copyright 2005© Siemens AG Functions Pin Requirements Implementation/Sequence Battery Charging is stopped, when overtemperatur occurs. Within temperature 128ms, 3 values are measured. When these 3 values are supervision identical status can be changed. The supervision is active in fast charge or trickle charge mode.
  • Page 41 Com Company Confidential Copyright 2005© Siemens AG Functions Pin Requirements Implementation/Sequence Audio Stereo VDDSTEREO For stereo mode 2 single ended buffers are used. These Mode STEREO1 buffers will be supplied by the additional regulator with 2.9 STEREO2 Volt to be more stable against the GSM ripple on the battery STEREOM voltage.

  • Page 42: Battery

    Com Company Confidential Copyright 2005© Siemens AG Functions Pin Requirements Implementation/Sequence I2S Interface CLO, The I2S Interface is a three wire connection that handels two WAO, timemultiplexed data channels. The three lines are the clock (CLO), the serial data line (DAO) and the word select line (WAO).

  • Page 43: Charging Concept

    Com Company Confidential Copyright 2005© Siemens AG 9.3 Charging Concept Charging current Charging control signal 9.3.1.1 Charging Concept General The battery is charged in the unit itself. The hardware and software is designed for LiIon with 4.2V technology. Charging is started as soon as the phone is connected to an external charger. If the phone is not switched on, then charging takes place in the background (the customer can see this via the “Charge”...
  • Page 44 Com Company Confidential Copyright 2005© Siemens AG Measurement of Battery, Battery Type and Ambient Temperature For the conversion of signals like battery voltage, battery type, temperature, EGOLDlite provides identical measurement interfaces. Measurement circuit is consisting of external sensing components and integrated analog multiplexers and switches. Through corresponding switch settings, the measured signal is passed to input of ADC.
  • Page 45 Com Company Confidential Copyright 2005© Siemens AG Restrictions • A battery which has completely run down can not be re-charged quickly because the battery voltage is less than 3.0V and the logic which implements the charge control cannot be operated at this low voltage level.
  • Page 46 Com Company Confidential Copyright 2005© Siemens AG 10 Interfaces 10.1 Vibra (XG220) Pin IN/OUT Remarks BATT+ The FET V211, switching this signal, is controlled via EGOLDLite signal VIBRA_UC. Page TD_Repair_L2.5_A70_A75_R1.0.pdf Release 1.0...
  • Page 47 Com Company Confidential Copyright 2005© Siemens AG 10.2 Earpiece (XG243) Pin Name IN/OUT Remarks EPP1 1st connection to the internal earpiece. Earpiece can be switched off in the case of accessory operation. EPP1 builds together with EPN1 the differential output to drive multifunctional “earpiece”...
  • Page 48 Com Company Confidential Copyright 2005© Siemens AG 10.3 Microphone Pin Name IN/OUT Remarks MICP1 Microphone power supply. The same line carries the frequency speech signal. GND_MIC 10.4 Battery (X181) Name Level Remarks BATT+ 3 V... 4.5V Positive battery pole AKKU_TYP 0V...2.65V...
  • Page 49 Com Company Confidential Copyright 2005© Siemens AG 10.5 IO Connector (X211) with ESD protection (Z211) IO Connector Name IN/OUT Notes POWER POWER is needed for charging batteries and for supplying the accessories. If accessories are supplied by mobile, talk- time and standby-time from telephone are reduced.
  • Page 50 Com Company Confidential Copyright 2005© Siemens AG ESD Protection with EMI filter Z211 is a 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...
  • Page 51 Com Company Confidential Copyright 2005© Siemens AG 10.6 SIM Pin Name IN/OUT Remarks CCLK Pulse for chipcard. The chipcard is controlled directly from the EGOLDlite. CCRST Reset for chipcard CCIO Data pin for chipcard; 10 kΩ pull up at the...
  • Page 52 Com Company Confidential Copyright 2005© Siemens AG 11 Keyboard The keyboard is connected via the lines KB0 – KB9 with the EGOLDlite. KB 7 is used for the ON/OFF switch. The lines KB0 – KB5 are used as output signals. In the matrix KB6, KB8 and KB9 are used as input signals for the EGOLDlite.
  • Page 53 Com Company Confidential Copyright 2005© Siemens AG Page TD_Repair_L2.5_A70_A75_R1.0.pdf Release 1.0...

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A75

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