Huawei E5331 Maintenance Manual
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Huawei E5331 Maintenance Manual

Maintenance manual basic version
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E5331 Maintenance Manual Basic Version
Prepared by
Reviewed by
Approved by
V1.0
Product Department
Documentation Team
Product Department
Technology Support Engineer
Product Department Service
Representative of product
Huawei Technologies Co., Ltd.
All rights reserved
Date
2012-2-6
Date
2012-2-6
Date
2012-2-6

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Summary of Contents for Huawei E5331

  • Page 1 E5331 Maintenance Manual Basic Version V1.0 Product Department Prepared by Date 2012-2-6 Documentation Team Product Department Reviewed by Date 2012-2-6 Technology Support Engineer Product Department Service Approved by Date 2012-2-6 Representative of product Huawei Technologies Co., Ltd. All rights reserved...
  • Page 2 Internal E5331 Maintenance Manual Basic Version V1.0 Revision Record Revision Revision Section Change Date Author Version Reason Number Description Product Department Documentation 2012-2-6 V1.0 Team 2012-4-21 Huawei confidential. No spreading without permission. Page 2 of 57...

  • Page 3: Table Of Contents

    Internal E5331 Maintenance Manual Basic Version V1.0 Contents PRODUCT INTRODUCTION ............................5 ..............................5 RODUCT PPEARANCE ............................5 ARDWARE PECIFICATIONS MAINTENANCE INSTRUCTIONS ........................... 7 ............................7 OCUMENT PPLICATION ............................. 7 AINTENANCE RECAUTIONS ........................7 AINTENANCE NFORMATION IRECTION EXPLODED VIEW OF THE WHOLE UNIT ........................8 LOCATION OF COMPONENTS ON THE MAIN BOARD ....................
  • Page 4 Internal E5331 Maintenance Manual Basic Version V1.0 RF Receiving Failure – WCDMA 2100MHz ....................44 9.8.1 RF Receiving Failure – WCDMA 900MHz ....................46 9.8.2 RF Receiving Failure – GSM........................47 9.8.3 RF Transmitting Failure – WCDMA 2100MHz ................... 48 9.8.4...

  • Page 5: Product Introduction

    Internal E5331 Maintenance Manual Basic Version V1.0 Product Introduction 1.1 Product Appearance 1.2 Hardware Specifications Item Specifications  WAN: HSPA+/HSPA/UMTS/EDGE/GPRS/GSM Technical standard  WLAN: IEEE 802.11b/g/n HSPA+/HSPA/UMTS E5331: 2100/900MHz Operating frequency EDGE/GPRS/GSM: 1900/1800/900/850MHz WLAN: 2.401GHz–2.495GHz Internal memory 128MB Flash, 64MB Memory UMTS: ≥24 (+1/-3) dBm...
  • Page 6 Internal E5331 Maintenance Manual Basic Version V1.0 Item Specifications 802.11b: Up to 11Mbit/s WLAN speed 802.11g: Up to 54Mbit/s 802.11n: Support MCS0–MCS7; Up to 72.2Mbit/s. Maximum power 3.5 W consumption  AC: 100V–240V Power supply  DC: 5V, 1A ...

  • Page 7: Maintenance Instructions

    This document provides instructions for the maintenance of Huawei products for the maintenance personnel in Huawei-authorized service sites. This manual is Huawei proprietary and is only permitted to be used by authorized service sites or companies. Mistakes may be found in the document. If you have found any mistake or have any suggestion, please contact our customer service personnel.

  • Page 8: Exploded View Of The Whole Unit

    Internal E5331 Maintenance Manual Basic Version V1.0 Exploded View of the Whole Unit This exploded view is only applied to show phone frame. It is not regarded as a reference for applying spare parts. Description Quantity WiFi Antenna Battery Cover...

  • Page 9: Location Of Components On The Main Board

    Internal E5331 Maintenance Manual Basic Version V1.0 Location of Components on the Main Board Take E5331 for example: Z701 SAW FILTER U703 SPDT U801 U502 Duplexer –W900MHz –W900MHz Failure Symptom: Front End Module Failure Symptom: Failure Symptom: Failure Symptom: RF Failure...
  • Page 10 Internal E5331 Maintenance Manual Basic Version V1.0 BOM List is only for your reference, the lasted BOM information is downloaded in the system of Huawei. Description Location 07050038 NTC,10000ohm,NTC,SMD,0402,B=3380K,TS16949 RT301 07050063 Thermistor,150kohm+/-5%,SMT,0402 RT4101,RT4201,RT4224 07040075 Varistor,18V,14V,10A,40V,SMT,0402,82pF@1KHz RV3301,RV3601 07040071 Varistor,90V,45V,1A,300V,SMT,0402,3pF@1MHz RV4101,RV4102,RV4103, RV4104,RV4105,RV4106 16100036 Touch switch-SPST-12V(DC)-0.05A-SMT-0.6mm-5*2.5-100000-for...
  • Page 11 Internal E5331 Maintenance Manual Basic Version V1.0 35020090 Consumable U3101 Chip,Hi6755RBCV120,SVFBGA,1.2/2.5V,WCDMA/HSPA Communication Baseband Function,SOC Support Dual Mode PS 39110566 Switching Regulators,1~4V,1.5A,SMT U3802 39200280 Terminal Dedicated IC,WIFI 802.11bgn,1.8V~3.3V,BGA97(Pb-Free) U3901 47140023 RF Switch,DC~3000MHz,SPDT,0.6dB,1.4,20dB,SOP6-26-50,250V U4002 39070085 Battery Management IC,4.1~16V,DC-DC Charger,Smart Power U4201 Control,QFN,SMT 39110532 Voltage Regulator,Vin~20V,0.7A,5-Pin SOT23...

  • Page 12: Software Upgrade

    BOM: 02450760 5.2 Hardware connection USB Cable E5331 5.3 Client Software Installation Power on the E5331. Connect the E5331 to the PC with USB data cable. Double click the “MobileWiFi”. 2012-4-21 Huawei confidential. No spreading without permission. Page 12 of 57...
  • Page 13 Internal E5331 Maintenance Manual Basic Version V1.0 2012-4-21 Huawei confidential. No spreading without permission. Page 13 of 57...
  • Page 14 Internal E5331 Maintenance Manual Basic Version V1.0 Click “Next” to continue. Click “I Agree” to continue. 2012-4-21 Huawei confidential. No spreading without permission. Page 14 of 57...
  • Page 15 Internal E5331 Maintenance Manual Basic Version V1.0 2012-4-21 Huawei confidential. No spreading without permission. Page 15 of 57...
  • Page 16 Internal E5331 Maintenance Manual Basic Version V1.0 Click “Install” to continue. 2012-4-21 Huawei confidential. No spreading without permission. Page 16 of 57...
  • Page 17 Internal E5331 Maintenance Manual Basic Version V1.0 The installation is completed. Click “Finish” to close the window. 2012-4-21 Huawei confidential. No spreading without permission. Page 17 of 57...
  • Page 18 Internal E5331 Maintenance Manual Basic Version V1.0 Power on the wireless modem. Then connect the wireless modem to the PC with USB data cable. Access the “Device Management” to check if the connection between the wireless modem and the PC is well.

  • Page 19: Update Procedure

    Internal E5331 Maintenance Manual Basic Version V1.0 5.4 Update Procedure Please install the client software before upgrade. After updated successfully, please restore the factory settings. 2012-4-21 Huawei confidential. No spreading without permission. Page 19 of 57...

  • Page 20: Normal Upgrade

    5.4.1 Normal Upgrade 1. Start Upgrade tool, shows as below(actual verisoin is depended on the upgraded firmware )，click “next” button to ready to start upgrade the E5331: 2. click start button, the upgrade sofrware start upgrading, shows as below: 2012-4-21 Huawei confidential.
  • Page 21 Internal E5331 Maintenance Manual Basic Version V1.0 3. After upgrade complete, the board reboot automatically。 4. At last, all work complete, shows as below (actual verisoin is depended on the upgraded firmware ),please click the “Finish” button to finish the upgrade: 5.

  • Page 22: Check The Software Version

    Internal E5331 Maintenance Manual Basic Version V1.0 5.5 Check the Software Version Verify the FW version from WebUI. You may visit http://192.168.1.1 Log_in Check Version for E5331. 5.6 Exception Handling Ensure that… Failure Type The wireless modem is power on...
  • Page 23 Internal E5331 Maintenance Manual Basic Version V1.0 Ensure that… Failure Type Open the upgrade software is correctly. Upgrade software failure You can restart the PC and the wireless modem to try the download again. 2012-4-21 Huawei confidential. No spreading without permission.

  • Page 24: Maintenance Tools

    Internal E5331 Maintenance Manual Basic Version V1.0 Maintenance Tools Name: constant-temperature gun Application: It is used to heat the components. Name: soldering iron Application: It is used for soldering during maintenance. Name: DC power Application: It is used to supply power.
  • Page 25 Internal E5331 Maintenance Manual Basic Version V1.0 Name: Oscillograph Application: It is used for measuring during maintenance. Name: Tool kit Application: It is used to assembly and disassembly the wireless modem. Name: Electrical screwdriver Application: It used for turning screws.

  • Page 26: Disassembly Procedure

    Internal E5331 Maintenance Manual Basic Version V1.0 Disassembly Procedure 2. Disassemble procedure of the E5331 is shown below. 1. Make sure the ESD antistatic wrist strap connect to the ground is normal. 3. Remove the battery cover. 4. Remove the battery.
  • Page 27 Internal E5331 Maintenance Manual Basic Version V1.0 5. Remove the seven screws. 6. Loosen the Front cover, Remove the Front cover. 8.Disassembly procedure E5331 7. Remove the main board. completed. 2012-4-21 Huawei confidential. No spreading without permission. Page 27 of 57...

  • Page 28: Assembly Procedure

    Internal E5331 Maintenance Manual Basic Version V1.0 Assembly Procedure 2. Assembly procedure of the E5331 is shown 1. Make sure the ESD antistatic wrist strap connect to the ground is normal. below. 3. Install the main board. 4. Install the back cover.
  • Page 29 Internal E5331 Maintenance Manual Basic Version V1.0 5. Install the screw. 6. Install the battery. 7. Install the battery cover. 8. Assembly procedure of the E5331 is completed. 2012-4-21 Huawei confidential. No spreading without permission. Page 29 of 57...

  • Page 30: Troubleshooting For Common Faults

    Internal E5331 Maintenance Manual Basic Version V1.0 Troubleshooting for Common Faults Take E5331 for example: Before performing the following troubleshooting operations on the hardware, ensure that the software on the wireless modem is in good condition and is restored to default settings.

  • Page 31: No Power On

    Internal E5331 Maintenance Manual Basic Version V1.0 9.2 No Power on 9.2.1 No Power On—High Current (DC Power Supply) Reference Figure 9-1 2012-4-21 Huawei confidential. No spreading without permission. Page 31 of 57...
  • Page 32 Internal E5331 Maintenance Manual Basic Version V1.0 High Current Replace the Measure J3801 pin3 C3811,C3810 whether is short？ &C3806 Remove the Replace the U3801, then check if it is U3801 not short? Remove the Replace the U3501, then check if it is not...
  • Page 33 Internal E5331 Maintenance Manual Basic Version V1.0 J3701 U801 J3702 U501 U401 U4001 J3801 U101 L3601 TCXO301 U3101 U3501 U3201 U3801 Figure 2012-4-21 Huawei confidential. No spreading without permission. Page 33 of 57...

  • Page 34: No Power On-Small Current (Dc Power Supply)

    Internal E5331 Maintenance Manual Basic Version V1.0 9.2.2 No Power On—Small Current (DC Power Supply) Reference Figure 9-2 Small Current Download the latest software version, check whether it is normal? Measure whether Replace the output signal value of the X3501...
  • Page 35 Internal E5331 Maintenance Manual Basic Version V1.0 U201 Output Reference Value Test Point VREG_SIM 3V/1.8V C3513 V_TCXO_2V85 2.85V C3510 VOUT12 3.3V C3516 VDD_1V2T 1.2V C3504 VDD_1V2C 1.2V C3502 VDD_1V8 1.8V C3503 C3503 VDD_1V8 1.8V C3522 VDD_PMU 2.85V C3502 VDD_1V2C 1.2V C3521 VBUCK5 3.1V...

  • Page 36: Charge Failure

    Internal E5331 Maintenance Manual Basic Version V1.0 9.3 Charge Failure Reference Figure 9-3 Charge Failure Insert charger Measure if the voltage Replace the of VBUS is 5V? J3701 Measure if the voltage Replace the of VBAT is 3.4-4.2V? U3801 Replace the U3101...

  • Page 37: Sim Card Failure

    Internal E5331 Maintenance Manual Basic Version V1.0 9.4 SIM Card Failure Reference Figure 9-4 SIM card failure Check whether Re-solder/ Socket is in good replace socket condition soldering？ Replace the Measure whether the C3416/C3513/C3702/C3719/R3701 faulty R3707/RV3705/RV3706/RV3707/RV3 components 708 Are normal?

  • Page 38: Data Communication Failure

    Internal E5331 Maintenance Manual Basic Version V1.0 C3713 Capacitor R3707 Resistor RV3708 Varistor R3701 Resistor C3702 Capacitor C3416 Capacitor RV3705 Varistor C3719 Capacitor RV3707 Varistor R3312 Resistor RV3706 Varistor C3718 Capacitor R3313 Resistor C3717 Capacitor Figure 9.5 Data Communication Failure...
  • Page 39 Internal E5331 Maintenance Manual Basic Version V1.0 Data Communication Failure Replace the Check whether J3701 is normal？ J3701 Measure whether the Replace the RV3703/RV3704/C3720 faulty /C3721/C3705/C3706/L3701/L37 components 02 are normal? Replace the U3101 RV3703 Varistor RV3704 Varistor J3701 C3721 Capacitor 6.8pF...

  • Page 40: Display Failure

    Internal E5331 Maintenance Manual Basic Version V1.0 9.6 Display Failure Reference Figure 9-6 Display Failure Check the Measure whether battery power supply voltage of the LED /Replace the is normal? U3801 Replace the LED, check whether it is normal? Measure whether...
  • Page 41 Internal E5331 Maintenance Manual Basic Version V1.0 220Ω R3911 Resistor R3910 Resistor 300Ω R3914 Resistor 300Ω Q3905 Q3902 R3908 Resistor 300Ω Q3903 R3909 Resistor 220Ω R3915 Resistor 300Ω Q3904 Figure 2012-4-21 Huawei confidential. No spreading without permission. Page 41 of 57...

  • Page 42: Wlan Failure

    Internal E5331 Maintenance Manual Basic Version V1.0 9.7 WLAN Failure Reference Figure 9-7 WLAN Failure Upgrade the software. Then inspect if it is normal? Replace the Check whether WLAN antenna are normal？ antenna Replace the Check whether J4101&Z4101 faulty are normal？...
  • Page 43 Internal E5331 Maintenance Manual Basic Version V1.0 U4001 Power supply C4007 VDD_3V3_WIFI X4001 U4001 Power supply C4012 VDD_1V8_WIFI U4001 U4001 Power supply C4004 DVDD12 Z4101 U4102 J4101 Figure 2012-4-21 Huawei confidential. No spreading without permission. Page 43 of 57...

  • Page 44: Rf Failure

    Internal E5331 Maintenance Manual Basic Version V1.0 9.8 RF Failure 9.8.1 RF Receiving Failure – WCDMA 2100MHz Reference Figure 9-8 Receiving Failure (WCDMA9000MHZ) Update the sofeware。 Then inspect if it is normal? Check whether Replace antenna are normal antenna Replace Z603. Check whether It is normal Replace U801.
  • Page 45 Internal E5331 Maintenance Manual Basic Version V1.0 Figure 2012-4-21 Huawei confidential. No spreading without permission. Page 45 of 57...

  • Page 46: Rf Receiving Failure - Wcdma 900Mhz

    Internal E5331 Maintenance Manual Basic Version V1.0 9.8.2 RF Receiving Failure – WCDMA 900MHz Reference Figure 9-8 Receiving Failure (WCDMA9000MHZ) Update the sofeware。 Then inspect if it is normal? Check whether Replace antenna are normal antenna Replace Z603. Check whether It is normal Replace U801.

  • Page 47: Rf Receiving Failure - Gsm

    Internal E5331 Maintenance Manual Basic Version V1.0 9.8.3 RF Receiving Failure – GSM Reference Figure 9-8 Receiving Failure (GSM) Update the sofeware。 Then inspect if it is normal? Check whether Replace antenna are normal antenna Replace Z604&Z605. Check whether It is normal Replace U801.

  • Page 48: Rf Transmitting Failure - Wcdma 2100Mhz

    Internal E5331 Maintenance Manual Basic Version V1.0 9.8.4 RF Transmitting Failure – WCDMA 2100MHz Reference Figure 9-8 Transmitting Failure (WCDMA2100MHZ) Update the sofeware。 Then inspect if it is normal? Check whether Replace antenna are normal antenna Replace J801. Check whether It is normal Replace U801.

  • Page 49: Rf Transmitting Failure - Wcdma 900Mhz

    Internal E5331 Maintenance Manual Basic Version V1.0 9.8.5 RF Transmitting Failure – WCDMA 900MHz Reference Figure 9-8 Transmitting Failure (WCDMA2100MHZ) Update the sofeware。 Then inspect if it is normal? Check whether Replace antenna are normal antenna Replace J801. Check whether It is normal Replace U801.

  • Page 50: Rf Transmitting Failure - Gsm

    Internal E5331 Maintenance Manual Basic Version V1.0 9.8.6 RF Transmitting Failure – GSM Reference Figure 9-8 Transmitting Failure (GSM) Update the sofeware。 Then inspect if it is normal? Check whether Replace antenna are normal antenna Replace J801. Check whether It is normal Replace U801.

  • Page 51: Weld Points Indicator Chart For Pcb

    Internal E5331 Maintenance Manual Basic Version V1.0 Weld Points Indicator Chart for PCB : GND : Empty point 2012-4-21 Huawei confidential. No spreading without permission. Page 51 of 57...
  • Page 52 Internal E5331 Maintenance Manual Basic Version V1.0 : GND : Empty point 2012-4-21 Huawei confidential. No spreading without permission. Page 52 of 57...
  • Page 53 Internal E5331 Maintenance Manual Basic Version V1.0 : GND : Empty point 2012-4-21 Huawei confidential. No spreading without permission. Page 53 of 57...

  • Page 54: Functional Test

    Internal E5331 Maintenance Manual Basic Version V1.0 Functional Test 11.1 Appearance Introduction 2012-4-21 Huawei confidential. No spreading without permission. Page 54 of 57...

  • Page 55: Data Service

    The E5331 can be used as a wireless modem when the Wi-Fi is enabled. You can access the Internet service through setting up the wireless network connection with the E5331. A maximum of eight wireless users can access the E5331 at the same time. You can set up the WLAN with the access point (AP) function.
  • Page 56 Internal E5331 Maintenance Manual Basic Version V1.0 Multi-device access via Wi-Fi Multi-device access via Wi-Fi and USB at the same time 2012-4-21 Huawei confidential. No spreading without permission. Page 56 of 57...

  • Page 57: Internet Test

    Internal E5331 Maintenance Manual Basic Version V1.0 11.3 Internet Test For details of network connection settings, Please refer to Product Manual. 2012-4-21 Huawei confidential. No spreading without permission. Page 57 of 57...

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