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Mic ETS2228 Maintenance Manual

Fixed wireless terminal (fwt)
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ETS2228 Maintenance Manual
ETS2228 Maintenance Manual
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Summary of Contents for Mic ETS2228

  • Page 1 ETS2228 Maintenance Manual ETS2228 Maintenance Manual All right reserved Page 1, Total 43...

  • Page 2: Table Of Contents

    Contents Chapter 1 Overview ........................... 3 Brief Introduction of Product....................3 1.2 Specifications of the Software and Hardware ................4 Chapter 2 ETS2228 Principles......................... 5 2.1 Principles............................5 2.1.1 ETS2228 principle structure....................5 2.1.2 Detailed Introduction to Functional Circuit Unit ..............6 Chapter 3 Detailed Introduction of Functional Module................

  • Page 3: Chapter 1 Overview

    Chapter 1 Overview 1.1 Brief Introduction of Product Based on the protocol IS-2000 and CDMA technology, supporting 450M/800M/1900M with jointing different RF modules in PIPU, HUAWEI ETS2228 Fixed Wireless Terminal has the following features:  Working on frequency 800M; ...

  • Page 4: Specifications Of The Software And Hardware

    ETS2228 Maintenance Manual 1.2 Specifications of the Software and Hardware 1.2.1 Introduction to software functions Functional modules within software structure as follows: (1)Application processing module: Management of voice service. (2) Protocol shed processing module: to support the CDMA2000 1X standard and being compatible with the protocol IS-95.

  • Page 5: Chapter 2 Ets2228 Principles

    Chapter 2 ETS2228 Principles 2.1 Principles ETS2228 Fixed Wireless Terminal (FWT) is composed by two boards, keypad and LCD etc. one board is Terminal Communication Process Unit (TCPU), the other one is Phone Interface Process Unit(PIPU). The TCPU includes MSM6000 subsystem, Power supply and power management subsystem, RF subsystem and TCPU interface subsystem;...

  • Page 6: Detailed Introduction To Functional Circuit Unit

    ETS2228 Maintenance Manual board is Terminal Communication Process Unit (TCPU) and Phone Interface Process Unit (PIPU). The hardware architecture of FWT is shown in Figure 1. The TCPU is the core of an FWT, including a radio frequency (RF) receiving and transmitting unit, a central processing unit and a power module.
  • Page 7 ETS2228 Maintenance Manual Figure 2 Power-on Circuit With Battery  Charging Circuit When charging or discharging to battery, the management module is controlled by MSM6000 in TCPU. MSM6000 detects the voltage of the battery to output the signal CHG_EN, which control the charging to battery or not.
  • Page 8 ETS2228 audio interface includes handle receiver (the microphone and earphone is included), speaker interface and hands-free MIC interface. The power of speaker is quit bigger than the others, which must be amplified through the audio amplifier, but for hands-free MIC interface and handle receiver can be connected directly.
  • Page 9 ETS2228 Maintenance Manual Figure 4 Handset MIC Circuit 2）Handle Receiver Interface. Bead and capacitor constitutes the filter circuit. Figure 5 Handle Receiver Interface 3）Hands-free Interface Circuit The audio amplifier amplifies EAR2 signal to speaker, the switch of speaker is controlled by the bias voltage of MIC2_P.
  • Page 10 Figure 6 Hands-free Interface Circuit  LCD unit In the ETS2228 FWT, LCD is a peripheral component. If wrong with LCD, it can be replaced directly. The PIPU is compatible with the lattice LCD and the segment LCD, ETS2228 adopt the lattice LCD.
  • Page 11 ETS2228 Maintenance Manual Figure 7 LCD Hardware Interface Circuit FUNCTION DESCRIPTIONS SYMBOL PIN NO. /CS1 This is the chip select signal. /RES All right reserved Page 11, Total 43...
  • Page 12 ETS2228 Maintenance Manual 6~13 DATA BUS DB0~ DB7 Power supply Ground VOUT CAP3P CAP1N CAP1P DC/DC voltage converter. CAP2P CAP2N CAP4P This is a multi-level power supply for the liquid crystal drive. The voltage Supply applied is determined by the liquid crystal cell, and is changed through the use of a resistive voltage divided or through changing the impedance using an op.
  • Page 13 ETS2228 Maintenance Manual Figure 10 keypad implements circuit Figure 1 keypad back facet circuit  Asynchronous serial port drive circuit We put the drive of the serial port onto the serial port line. The output power level the serial port drive does not match the MSM6000 power level---The high power level of MSM6000 is 2.8V, while the high power level of the serial port drive is 4.4V.
  • Page 14 ETS2228 Maintenance Manual Input power level conversion circuit: Figure 2 Input power level conversion circuit Output power level conversion circuit: Figure 3 Output power level conversion circuit Data receiving signal power level conversion circuit. The power level conversion of signal UART1_RX is accomplished by clamp circuit.

  • Page 15: Chapter 3 Detailed Introduction Of Functional Module

    ETS2228 Maintenance Manual Figure 4 Data receiving signal power level conversion circuit Chapter 3 Detailed Introduction of Functional Module 3.1 Power Part（including power supply and power management） 1 .DC/DC power protect module This part is chosen joint circuit .the external power over voltage protection module protects the input power.
  • Page 16 ETS2228 Maintenance Manual Figure16 External power over voltage protection module 2. DC/DC power module The DC/DC power module generates 4.4V main power necessary for the operation of the whole machine. It also fulfills the constant current charging function. The maximum output current is 830mA.
  • Page 17 ETS2228 Maintenance Manual Figure 6 TL494 The differential amplifier can work within the range from AC -0.2V to 0.2V. The time overflow controller has a fixed offset to assure the stable output in case of the changed external input. The external oscillating circuit can be set through Rt/Ct (The working frequency to be set is 100KHZ).
  • Page 18 ETS2228 Maintenance Manual Figure19 Anti-reverse-insertion circuit 4 .Second-time power voltage-limiting module The second-time power voltage-limiting module limits the second-time power voltage to 4.4V. When the constant current charging operation is ended, the second-time power output is stabilized to 4.4V to provide power for the back-level circuit.. The feedback loop is accomplished by operational amplifier 1 of TL494.
  • Page 19 ETS2228 Maintenance Manual Figure 7 Second-time power voltage-limiting module 5 .Battery temperature switchover module The temperature’s measure is finished on TTPU veneer, and the battery’s ID measure is finished on PIPU veneer. This module converts the thermistor into voltage and sends the voltage to ADC on the TCPU board to be measured.

  • Page 20: Base Band Part

    ETS2228 Maintenance Manual PM6610 PIN NO. Function Description Signal Name HKADC5 Veneer temperature PHONE_THERM sampling HKADC8 Battery temperature BAT_TEMP sampling HKADC9 BAT_ID Battery identify （ Battery ID） Table 1 Environment variable measure PIN 3.2 Base Band Part The MSM6000 sub-system includes voice coding/decoding unit, baseband signal processing unit, and CPU system on which protocol software runs.
  • Page 21 ETS2228 Maintenance Manual Signal Signal name Signal flow Signal function Receive unit’s PIN direction name VREG-PH Interface board ICHARGE_P(3 interface→PM6610 power supply power VDD-ANA(12) VDD，supply power to 、 PM6610 VDD-MSM(15) 、 VDD-MAIN(30 VEXT-DC prescription of VCHARGER(1 interface→PM6610 external power supply V-BATT interface→PM6610...
  • Page 22 ETS2228 Maintenance Manual which produces power chip SBI-ST MSM6000 control SBST(22) MSM6000→PM6610 signal SBI-CK MSM6000 control SBCK(21) MSM6000→PM6610 signal SBI-DT MSM6000 control SBDT(20) MSM6000→PM6610 signal back facet KEY_BAC KEYBD-DRV( keypad MSM6000→interface KLIGHT drive headstream VERG-TC Supply TCXO VERG-TCXO PM6610→TCXO voltage which produces （32）...

  • Page 23: Rf Part

    Table 2 power management module interface’s signal description 3.4 RF Part ETS2228 is the FWT working in the 800M frequency band .The structure of the FWTs which use WL71PIPU but working different frequency band is the same and the difference is RF part.
  • Page 24 ETS2228 Maintenance Manual Figure 8 RF receiving unit 2 .Transmit unit Primary unit function: Emission modulation module RFT6120 directly amplifies analog I/O signals after DA conversion. Next, radio frequency signals are generated after RF Mixer and RF filter function on the signals. Then the RF signals are amplified by the RF amplifier, so that RF emission signals set with certain output power value are generated.
  • Page 25 ETS2228 Maintenance Manual Table 9 RF emission unit 3 .RF tracing unit The main unit function is to provide RF local oscillation signals for transceiver. The RF duplex interval is 45MHz. Therefore, we design the RF oscillator to be shared by both receiving and transmitting operations.
  • Page 26 ETS2228 Maintenance Manual LOCK SBI control （CP-RX） Digital logic RX-CP interface TCXO Counter RX-FAQ Phase Loop filter checking RX-CP VCO-TUNE RFT6122 RFR6122 Rx-LO-IN LO-OUT （RX-LO-BUFF） note： Red signal is the definition of RFT pins, blue signal is the definition of RFR PIN, green signal is the definition of interface.
  • Page 27 ETS2228 Maintenance Manual 3.5 Parameter Indices 1 .Performance Indices  Primary indices of the receiving unit: （1）Basic indices （2）Frequency range: Work frequency 869MHZ--894MHZ MHz （3）Noise coefficient under sensitivity condition: <=7.5dB (Note: Including the loss from duplexer) （4）Linearity requirement （5）Sensitivity capability indices：≤-106dBm/1.23MHz （6）Amplitude frequency characteristics...
  • Page 28 ETS2228 Maintenance Manual Reference source signal indices:： （1）Frequency 19.2MHz （2）Frequency error ±2ppm（-30℃～85℃） （3）Output signal amplitude 0.5Vpp（min） Indices of emitting and receiving intermediate frequency local oscillation signals ：Zero intermediate frequency method RF local oscillation signals Indices： （1）Output frequency: 1664～1788MHz； （2）Output power: -12dBm 2 .Electric Indices...

  • Page 29: Chapter4 Engineering Mode And Test Mode

    ETS2228 Maintenance Manual Chapter4 Engineering Mode and Test Mode 4.1 Entrance to engineering mode and test mode 1、Entering test mode ： Inputting keypad command ＃＃10999* to enter factory test mode：  Press 4 to hands-freeing voice loopback.  Press 6 to handle loopback.

  • Page 30: Chapter 5 Troubleshooting

    ETS2228 Maintenance Manual Chapter 5 Troubleshooting 1）Troubleshooting Procedure of the Baseband （ 1、Power fault maintenance procedure power-on and startup Check if Q301 is Chiefly check if CE good. junction of Q301 is good Check if the voltage of Check if Check if the voltage of foot 4 of foot 4 of U302 is 1.25V.
  • Page 31 ETS2228 Maintenance Manual 2、Initialization fault maintenance procedure power-on and startup Is the voltage of pin 10 of Check if the clock output of pin 3 of X501 is 19.2MHz. J404 is 2.84V？ Check if the clock signal on the Any 19.2MHz clock signal channel of X501 is normal.
  • Page 32 ETS2228 Maintenance Manual 3、Key-press fault maintenance procedure power-on and startup Does LCD respond after Check inter-board connection power the key is pressed? and replace the fault cable. Doed LCD show value of Check if keys are reliably connected with the key pressed? the keypad and remove faults.
  • Page 33 ETS2228 Maintenance Manual 4、LCD display fault maintenance procedure Figure 14 LCD LCD display fault maintenance procedure All right reserved Page 33, Total 43...
  • Page 34 ETS2228 Maintenance Manual 5、Hands-free fault maintenance procedure Figure 15 Hands-free fault maintenance procedure All right reserved Page 34, Total 43...
  • Page 35 ETS2228 Maintenance Manual 6、Charging fault maintenance procedure Figure 16 Charging fault maintenance procedure All right reserved Page 35, Total 43...
  • Page 36 ETS2228 Maintenance Manual 7、Data service fault maintenance procedure Figure 17 Data service fault maintenance procedure All right reserved Page 36, Total 43...
  • Page 37 ETS2228 Maintenance Manual （2）RF Processing Module Fault Maintenance Procedure 1、RF Channel Fault Maintenance Procedure Figure 18 RF Channel Fault Maintenance Procedure All right reserved Page 37, Total 43...
  • Page 38 ETS2228 Maintenance Manual 2、RF receiving channel fault maintenance procedure Figure 19 RF receiving channel fault maintenance procedure All right reserved Page 38, Total 43...
  • Page 39 ETS2228 Maintenance Manual 3、RF emission channel fault maintenance procedure Figure 20 RF emission channel fault maintenance procedure All right reserved Page 39, Total 43...

  • Page 40: Chapter 6 Nam Programming

    ETS2228 Maintenance Manual Chapter 6 Name Programming Please refer to Key Command Operation Guide.enclosed. All right reserved Page 40, Total 43...

  • Page 41: Chapter 7 Appendix

    ETS2228 Maintenance Manual Chapter 7 Appendix 7.1 Damageable Spare Part List Location Code Name Number Manufactured board-T601-450AS-WL71PIPB-RASYS FWT interface 03020ASS module-1*2 T601-450AS,Phone type FWT Series Generally Parts Set,Graphic 02235191 Suit LCD,White,For ETS2X28 02130633 Primary power supply--5degC-45degC-190V-300V-(12V+/-5%)/0.5A Accessory Rechargeable battery,Nickel Metal Hydride Battery,3.6V,1.0Ah,Battery...

  • Page 42: Schematic Circuit Diagram

    ETS2228 Maintenance Manual 12070006 TCXO,19.2MHz,2.8V,2.5ppm,-30degC,85degC X501 12020102 TCXO -32.768KHZ X601 Operation Amplifier,Headphone Audio Power Amplifier with Digital 39080088 U602 Volume Control,2.0V~5.5V,1MHz,Stereo,LLP,Terminal Dedicated 7.2 Schematic Circuit Diagram 7.3 Mainboard Structure Diagram Please refer enclosed pages for BOM Schematics & Silk Screen.

  • Page 43: Abbreviations

    ETS2228 Maintenance Manual 7.5 Abbreviations Abbreviation English Phase lock loop ACLR Adjacent channel leakage power radio Radio frequncy Liquid crystal display Low noise amplifier CDMA Code-division multiple access Pulse coded modulation Universal serial bus UART Universal Asynchronous Receiver TCXO Temperature-compensated crystal oscillator...

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