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Huawei G5500 Manual

Huawei G5500 Manual

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HUAWEI Technologies
A training Course for Huawei G5500
无线产品部
www.huawei.com
Wireless Product Department, August. 2010
HUAWEI TECHNOLOGIES CO., LTD.
HUAWEI TECHNOLOGIES CO., LTD.
Page 1

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Summary of Contents for Huawei G5500

  • Page 1 HUAWEI Technologies A training Course for Huawei G5500 无线产品部 www.huawei.com Wireless Product Department, August. 2010 HUAWEI TECHNOLOGIES CO., LTD. HUAWEI TECHNOLOGIES CO., LTD. Page 1...
  • Page 2 Preface 1. Introduction 2. Training Objective (Skills that can be gained from this course) 3. Reference Materials HUAWEI TECHNOLOGIES CO., LTD. Page 2...
  • Page 3 Preface: Introduction This course provides information about G5500, including the appearance, principle, ways and skills of maintenance, procedures of assembly/disassembly, and the use of the upgrade software. HUAWEI TECHNOLOGIES CO., LTD. Page 3...
  • Page 4 Preface: Training Objective After finishing this course, you can: Use and maintain G5500, assemble/disassemble G5500, and upgrade software for G5500. HUAWEI TECHNOLOGIES CO., LTD. Page 4...
  • Page 5 Preface: Reference Materials This section lists the reference materials of this course. In addition, maintenance manual, upgrade guide, and appearance check specification are also included. HUAWEI TECHNOLOGIES CO., LTD. Page 5...
  • Page 6 Table of Contents Chapter 1 G5500 Introduction Chapter 2 G5500 Working Principle Chapter 3 G5500 Tool Usage Chapter 4 G5500 Maintenance Chapter 5 Note Points Chapter 6 HUAWEI TECHNOLOGIES CO., LTD. Page 6...

  • Page 7: G5500 Introduction

    Chapter 1 G5500 Introduction 1.1 G5500 Appearance HUAWEI TECHNOLOGIES CO., LTD. Page 7...
  • Page 8 1.2 G5500 Technical Specifications G5500 is a GSM ultra low-High Music bar-shaped mobile phone. With a 2.0' inch TFT LCD. The phone design takes human factors engineering into consideration. The material used is the environment-friendly PC + ABS materials. The PCBA + LCM and the other electronic components are lead-free products.

  • Page 9: G5500 Working Principle

    Chapter 2 G5500 Working Principle The composition and important functional components of the mobile phone are included. G5500 is based on the MTK6253 platform, with the following components. 1.CPU:MTK6253 2.PMU:PMU integrates in MTK6253 3.PA :SKY 77552 4. Flash memory PF38F3050M0Y3DF 5.All ports : LCD port, SIM port , USB port (charger), keyboard port , battery port, audio port...
  • Page 10 Chapter 3 G5500 Utilities 3.1 Ways for Obtaining Software and Operation Manuals HUAWEI TECHNOLOGIES CO., LTD. Page 10...
  • Page 11 G5500 ATE Test Software Operation Guide Huawei Terminal Company-OEM and cooperation department Software used to modify IMEI Operation Guide for the Software Used to modify G5500 IMEI Huawei Terminal Company-OEM and cooperation department Radio frequency test software Operation Guide for the Software Used for G5500 Radio Frequency...

  • Page 12: G5500 Maintenance

    Chapter 4 G5500 Maintenance 4.9 Troubleshooting Vibrator Faults 4.1 General Maintenance Ways 4.10 Troubleshooting PIM Socket Faults 4.2 Troubleshooting Power-on Faults 4.11 Troubleshooting Charging Faults 4.3 Troubleshooting Display Faults 4.12 Troubleshooting Signal Faults 4.4 Troubleshooting Back Light Faults 4.13 Troubleshooting Bluetooth Faults 4.5 Troubleshooting Key Pad Faults...
  • Page 13 An experienced maintenance engineer can roughly locate the fault and determine the faulty components according to the information about the fault provided by the user. Such a way helps to improve maintenance quality and efficiency. HUAWEI TECHNOLOGIES CO., LTD. Page 13...
  • Page 14 4.1.3 Writing Down the Model and IMEI Code of the Cell Phone Each cell phone has a unique number, that is, the IMEI code. To avoid delivery errors, you can write down IMEI codes before maintenance the cell phones received. HUAWEI TECHNOLOGIES CO., LTD. Page 14...
  • Page 15 Analyze the fault from a global view and then in detail. Locate the fault according to the symptom and check the possible causes one by one. After the fault is located, take corresponding measures with caution. 4.1.7 Maintenance Log After the problem is resolved, log it for future reference. HUAWEI TECHNOLOGIES CO., LTD. Page 15...
  • Page 16 4.2 Troubleshooting Power-on Faults 4.2.1 Power-on Circuit To pass then startup-key PWR_ON, PWRKEY is connected with GND, so the signal of PWRKEY will be lower, and the startup process starts. HUAWEI TECHNOLOGIES CO., LTD. Page 16...
  • Page 17 Automatic shutdown: Measure the important LDO output voltage. Ensure that each output is not faulty. Down system: Clear the user data in the flash. Re-download the software. If the problem remains, change the CPU. Slow response: Usually it is a CPU or flash problem. HUAWEI TECHNOLOGIES CO., LTD. Page 17...
  • Page 18 Symptom: Startup failed after the charger was connected.  Fault analysis: Measuring of the VCHG voltage showed that it was only 2V or so. Finally found  CN701 was poor soldered. Solution: Re-solder CN701.  HUAWEI TECHNOLOGIES CO., LTD. Page 18...
  • Page 19 Fault analysis: It was discovered that the startup current differed each time. Measuring of the  Reset signal showed that the signal was available sometimes and unavailable at other times. It was judged that the problem was CPU to poor soldering. Solution: Re-solder U100.  HUAWEI TECHNOLOGIES CO., LTD. Page 19...
  • Page 20 4.3.1 Display Circuit The main parts of display circuit are CN702 and LCD; circuit powered by MT6253 VIO; LCM_LED+ provides backlight driver, MT6253 and LCD NLD [0:8] signal for data transmission and several control signals HUAWEI TECHNOLOGIES CO., LTD. Page 20...
  • Page 21 Instance 1 : Symptom: LCD had no display. The backlight and other relevant parameters were all normal. Fault analysis: Measuring of the pins showed that the signals were normal. Solution: Re-soldering LCD. The problem was removed. HUAWEI TECHNOLOGIES CO., LTD. Page 21...
  • Page 22 4.4 Troubleshooting Back Light Faults 4.4.1 Back Light Circuit MT6253 chip integrated backlight driver module, the backlight driver module can connect to the LCD by CN702. HUAWEI TECHNOLOGIES CO., LTD. Page 22...
  • Page 23 The problem of no backlight was related to soldering, LCD and CN702. Exhaust each possibility to solve the problem. 4.4.3 Maintenance Instances LCD had no backlight. When the phone is power-on, measurements the LCM_LED+ found no voltage, we judgment is the MT6253 problem. Re-soldering removed the problem. HUAWEI TECHNOLOGIES CO., LTD. Page 23...
  • Page 24 4.5 Troubleshooting Key Pad Faults 4.5.1 Circuit Analysis HUAWEI TECHNOLOGIES CO., LTD. Page 24...
  • Page 25 KCOL or KROW wires are the same. In that way, check the signals of the network. 5.3 Cases Key OK was faulty. The corresponding KCOL and KROW were normal. Use ethanol to cleanse the corresponding DOME chip. HUAWEI TECHNOLOGIES CO., LTD. Page 25...
  • Page 26 4.6 Troubleshooting Ringing Faults 4.6.1 Ring Circuit The ring circuit consists of C523, B508, C535, D509, C527, B509, C536, D508, C537 and SPEARKER. HUAWEI TECHNOLOGIES CO., LTD. Page 26...
  • Page 27 The speaker had no sound. The measuring of the speaker impedance with a multimeter was 7.33ohm. Power on the mobile phone to enter the ring selecting mode. Measuring of the offset voltage on both ends of the speaker showed that it. HUAWEI TECHNOLOGIES CO., LTD. Page 27...
  • Page 28 B206, B207 and U100 also can solve the problem. 4.7.3 Maintenance Instances The receiver worked abnormally. Check B504, B512 and U100 are OK . Observation in the X ray showed that both ends were short-circuited. HUAWEI TECHNOLOGIES CO., LTD. Page 28...
  • Page 29 The microphone circuit consists of C524, R509, B506, D507, C525, R506, R512 and C526, The MICBIASP outputted by U100 forms the offset voltage circuit of the microphone after impedance splitting. The AD signals are transmitted to U100 through two blocking capacitors. HUAWEI TECHNOLOGIES CO., LTD. Page 29...
  • Page 30 There was no out audio. Measuring of the offset voltage showed that the voltage on both ends of the Mic was near 0V. In the end it was discovered that it was the problem of R509. Re-soldering R509 and the phone return to normal. HUAWEI TECHNOLOGIES CO., LTD. Page 30...
  • Page 31 4.9 Troubleshooting Vibrator Faults 4.9.1 Vibrator Circuit Vibration is controlled by VIBR. When VIBR turns high, the vibrator starts to work. When VIBR turns low, the vibrator stop to work. HUAWEI TECHNOLOGIES CO., LTD. Page 31...
  • Page 32 4.9.2 Troubleshooting Vibrator Faults The problem of the vibrator accounts for a large percentage of this type of faults. 4.9.3 Maintenance Instances There was no vibration. Changed the vibrator and solved the problem. HUAWEI TECHNOLOGIES CO., LTD. Page 32...
  • Page 33 It has five signal interfaces: VSIM, SIM_IO, SIM_RST and SIM_CLK, VSIM be used to provide voltage for the SIM card, SIM_IO and SIM_CLK be used to data exchange for SIM card. The figure is the SIM holder of CM301 is 8pin. Specific signals seen in the figure HUAWEI TECHNOLOGIES CO., LTD. Page 33...
  • Page 34 Card identification problem is usually caused by poor soldering of the CPU or other peripheral components. 4.10.3 Maintenance Instances Card identification problem. Measuring VSIM from the pressing down of the startup key to the actual startup showed no voltage. Replacing the CPU solved the problem . HUAWEI TECHNOLOGIES CO., LTD. Page 34...
  • Page 35 BATSNS. When the battery voltage rises to 4.2V, and the current is less than 20mA, the BATSNS will report to CPU U100-C to express the battery is full. Then, U100-C will control 4pin of Q301 to high- level(5V), so the Q301 will close. Charger Stop to charge the battery. HUAWEI TECHNOLOGIES CO., LTD. Page 35...
  • Page 36 HUAWEI TECHNOLOGIES CO., LTD. Page 36...
  • Page 37 4.11.3 Maintenance Instances In the case of no charging, replaced the battery, the problem remained. Measuring VCHG is 2V. In the end, the test showed that it was due to poor soldering of CN701. HUAWEI TECHNOLOGIES CO., LTD. Page 37...
  • Page 38 4.12 Troubleshooting Signal Faults 4.12.1 Circuit Analysis HUAWEI TECHNOLOGIES CO., LTD. Page 38...
  • Page 39 The signal was weak. The main board calibration was not faulty. The antenna plate was corrected so that it was connected fully to the main board. Searching the network again showed that the problem was removed. HUAWEI TECHNOLOGIES CO., LTD. Page 39...
  • Page 40 (MT6612) Bluetooth circuit as the image. Bluetooth receives signal through L601, C601, C602 and F601 to the pin 21 and 22 of MT6612, Bluetooth transmit signal through the circuit to the antenna. The circuit used a 32MHz crystal oscillator in the RF output circuit. HUAWEI TECHNOLOGIES CO., LTD. Page 40...
  • Page 41 HUAWEI TECHNOLOGIES CO., LTD. Page 41...
  • Page 42 4.13.3 Cases The Hardware Device busy. First check U700 is soldered all right. If it is poor soldered and got to hot up, and power on Bluetooth, searching device the problem was removed. HUAWEI TECHNOLOGIES CO., LTD. Page 42...
  • Page 43 FM circuit has U100 and U602, and U602 is integration FM IC .PMU in MT6253 output AVDD, and support FM circuit. MT6253 output GPIO75_FM_32k to U602 used support clock signal. MT6253 control FM circuit working by serial interface, and FM_ANT connect to earphone port, use to FM RF input HUAWEI TECHNOLOGIES CO., LTD. Page 43...
  • Page 44 HUAWEI TECHNOLOGIES CO., LTD. Page 44...
  • Page 45 4.14.3 Maintenance Instances FM can’t get any stations. And can fine the I/O port one pin poor soldered. The problem was analyzed by repair. The pin is FM_ANT signal line. And re-solder the problem was removed HUAWEI TECHNOLOGIES CO., LTD. Page 45...
  • Page 46 4.15 Camera Faults Troubleshooting Camera circuit has CN703 and U100. U100 control data, clock, reset signal of camera circuit. VBAT support U100 power, U100 output 1.8V and 2.8v of voltage to CN703 camera port. HUAWEI TECHNOLOGIES CO., LTD. Page 46...
  • Page 47 OK. 4.15.3 Cases When using camera, the LCD view back screen. And measure the support power circuit. Finding no voltage, then exchange U100. The camera can normal work, the problem was removed. HUAWEI TECHNOLOGIES CO., LTD. Page 47...
  • Page 48 4.16 Ways for Obtaining Maintenance Manuals For the maintenance of specific circuits, refer to the corresponding maintenance manuals and maintenance guides. HUAWEI TECHNOLOGIES CO., LTD. Page 48...

  • Page 49: Note Points

    Contact your vendor for information about the affect of your cell phone to pacemaker and other medical-electric devices. Cell phone can also affect the operation of televisions, radios, PC, and so on. HUAWEI TECHNOLOGIES CO., LTD. Page 49...
  • Page 50 Do not Assemble/Disassemble Your Cell Phone in Normal Cases Do not disassemble or refit your cell phone. Otherwise, your cell phone may be damaged, battery creepage and circuit errors may occur. HUAWEI TECHNOLOGIES CO., LTD. Page 50...
  • Page 51 11. Clean Your Cell phone Properly Use wet cloth and neutral wash to clean your cell phone. Do not use acidic cleaning solvent, which rots the shell and the parts of your cell phone. HUAWEI TECHNOLOGIES CO., LTD. Page 51...
  • Page 52 14. Keep the SIM Card with Caution The SIM card can be removed from your cell phone. Make sure it is beyond the reach of children if you remove it from your cell phone. HUAWEI TECHNOLOGIES CO., LTD. Page 52...
  • Page 53 The original call will be held. Touch the Bottom right corner of the screen to select Reject to continue the original call and reject the new incoming call. HUAWEI TECHNOLOGIES CO., LTD. Page 53...
  • Page 54 Press the button of Options during a call, and choose “recorder” in the options to start record. It can Pause/Stop recording, and select Save audio or not. 1.10 How to use the DTMF function during a call? Press the bottom of Options to select DTMF on/off on the Options during a call. HUAWEI TECHNOLOGIES CO., LTD. Page 54...
  • Page 55 Operation: In the standby state, press keys 2 to 9 (about 3s) to dial the corresponding number. 2.5 How many call records can the mobile phone save automatically? Missed call records:20 Received call records:20 Dialed call records:20 HUAWEI TECHNOLOGIES CO., LTD. Page 55...
  • Page 56 SIM card: Depending on the capacity of the SIM card (the phone capacity is 500) 3.7 How to query the remaining storage space for the SMS? Enter Menu–Messages–SMS–SMS Settings–Memory Status to display the total space and used space for SMS in the SIM card and phone. HUAWEI TECHNOLOGIES CO., LTD. Page 56...
  • Page 57 4.6 Does the mobile phone have Camera and video recorder function? Yes. 4.7 Does the mobile phone have Bluetooth function? Yes. Enter Menu—Extra—Bluetooth—Power. 4.8 Does the mobile phone have WAP function? Yes. 4.9 Does the mobile phone have E-book applications? Yes. HUAWEI TECHNOLOGIES CO., LTD. Page 57...
  • Page 58 5.3 How to lock and unlock the mobile phone quickly? In the standby state, press left soft key, then press “*” to lock the keypad. When the keypad is locked, press the Left soft Key and then press “*” to unlock the keypad. HUAWEI TECHNOLOGIES CO., LTD. Page 58...
  • Page 59 Thank You www.huawei.com HUAWEI TECHNOLOGIES CO., LTD. Page 59...