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E5331 Maintenance Manual Basic Version V1.0 

 
 

Internal 

 

 

2012-4-21 

Huawei confidential. No spreading without permission. 

Page 3 of 57 

 

 

 

Contents 

1

 

PRODUCT INTRODUCTION

 ............................................................................................................................................ 5

 

1.1

 

P

RODUCT 

A

PPEARANCE

 ................................................................................................................................................ 5

 

1.2

 

H

ARDWARE 

S

PECIFICATIONS

 ....................................................................................................................................... 5

 

2

 

MAINTENANCE INSTRUCTIONS

 ................................................................................................................................... 7

 

2.1

 

D

OCUMENT 

A

PPLICATION

 ............................................................................................................................................ 7

 

2.2

 

M

AINTENANCE 

P

RECAUTIONS

 ..................................................................................................................................... 7

 

2.3

 

M

AINTENANCE 

I

NFORMATION 

D

IRECTION

 .................................................................................................................. 7

 

3

 

EXPLODED VIEW OF THE WHOLE UNIT

 .................................................................................................................... 8

 

4

 

LOCATION OF COMPONENTS ON THE MAIN BOARD

 ............................................................................................ 9

 

5

 

SOFTWARE UPGRADE

 .................................................................................................................................................. 12

 

5.1

 

P

REPARATIONS 

B

EFORE 

U

PGRADE

 ............................................................................................................................ 12

 

5.2

 

H

ARDWARE CONNECTION

 ........................................................................................................................................... 12

 

5.3

 

C

LIENT 

S

OFTWARE 

I

NSTALLATION

 ............................................................................................................................ 12

 

5.4

 

U

PDATE 

P

ROCEDURE

 .................................................................................................................................................. 19

 

5.4.1

 

Normal Upgrade ............................................................................................................................................ 20

 

5.5

 

C

HECK THE 

S

OFTWARE 

V

ERSION

 .............................................................................................................................. 22

 

5.6

 

E

XCEPTION 

H

ANDLING

 ............................................................................................................................................... 22

 

6

 

MAINTENANCE TOOLS

 ................................................................................................................................................. 24

 

7

 

DISASSEMBLY PROCEDURE

 ....................................................................................................................................... 26

 

8

 

ASSEMBLY PROCEDURE

 ............................................................................................................................................. 28

 

9

 

TROUBLESHOOTING FOR COMMON FAULTS

 ........................................................................................................ 30

 

9.1

 

P

RINCIPLE 

I

NSTRUCTION

 ........................................................................................................................................... 30

 

9.2

 

N

O 

P

OWER ON

 ............................................................................................................................................................. 31

 

9.2.1

 

No Power On—High Current (DC Power Supply) ...................................................................................... 31

 

9.2.2

 

No Power On—Small Current (DC Power Supply) ..................................................................................... 34

 

9.3

 

C

HARGE 

F

AILURE

 ....................................................................................................................................................... 36

 

9.4

 

SIM

 

C

ARD 

F

AILURE

 .................................................................................................................................................... 37

 

9.5

 

D

ATA 

C

OMMUNICATION 

F

AILURE

 .............................................................................................................................. 38

 

9.6

 

D

ISPLAY 

F

AILURE

 ........................................................................................................................................................ 40

 

9.7

 

WLAN

 

F

AILURE

 ......................................................................................................................................................... 42

 

9.8

 

RF

 

F

AILURE

................................................................................................................................................................. 44

 

Summary of Contents for E5331

Page 1: ... by Product Department Documentation Team Date 2012 2 6 Reviewed by Product Department Technology Support Engineer Date 2012 2 6 Approved by Product Department Service Representative of product Date 2012 2 6 Huawei Technologies Co Ltd All rights reserved ...

Page 2: ...on V1 0 Internal 2012 4 21 Huawei confidential No spreading without permission Page 2 of 57 Revision Record Date Revision Version Revision Reason Section Number Change Description Author 2012 2 6 V1 0 Product Department Documentation Team ...

Page 3: ...SOFTWARE UPGRADE 12 5 1 PREPARATIONS BEFORE UPGRADE 12 5 2 HARDWARE CONNECTION 12 5 3 CLIENT SOFTWARE INSTALLATION 12 5 4 UPDATE PROCEDURE 19 5 4 1 Normal Upgrade 20 5 5 CHECK THE SOFTWARE VERSION 22 5 6 EXCEPTION HANDLING 22 6 MAINTENANCE TOOLS 24 7 DISASSEMBLY PROCEDURE 26 8 ASSEMBLY PROCEDURE 28 9 TROUBLESHOOTING FOR COMMON FAULTS 30 9 1 PRINCIPLE INSTRUCTION 30 9 2 NO POWER ON 31 9 2 1 No Powe...

Page 4: ... Receiving Failure WCDMA 900MHz 46 9 8 3 RF Receiving Failure GSM 47 9 8 4 RF Transmitting Failure WCDMA 2100MHz 48 9 8 5 RF Transmitting Failure WCDMA 900MHz 49 9 8 6 RF Transmitting Failure GSM 50 10 WELD POINTS INDICATOR CHART FOR PCB 51 11 FUNCTIONAL TEST 54 11 1 APPEARANCE INTRODUCTION 54 11 2 DATA SERVICE 55 11 2 1 USB Modem 55 11 2 2 Wireless Modem 55 11 3 INTERNET TEST 57 ...

Page 5: ...AN HSPA HSPA UMTS EDGE GPRS GSM WLAN IEEE 802 11b g n Operating frequency HSPA HSPA UMTS E5331 2100 900MHz EDGE GPRS GSM 1900 1800 900 850MHz WLAN 2 401GHz 2 495GHz Internal memory 128MB Flash 64MB Memory Maximum transmitter power UMTS 24 1 3 dBm WLAN Power adapter mode 802 11b 14 3 dBm 802 11g 11 3 dBm 802 11n 7 3 dBm Receiver sensitivity UMTS 106dBm WLAN 802 11b 76dBm 11Mbps 82dBm 1Mbps WLAN 802...

Page 6: ...i Rechargeable Capacity 3 7 V 1500 mAh Maximum working time 4 5 hours Maximum standby time 150 hours while Wi Fi is off 30 hours while Wi Fi is often on External interfaces USB interface Micro USB SIM card standard 6 pin SIM card interface Display screen LED key press Power key Reset key Antenna Built in GSM UMTS main diversity antenna Built in UMTS diversity antenna Built in WLAN antenna Dimensio...

Page 7: ...ucted only by qualified technical personnel Always wear an antistatic wrist strap during the operation and conduct the maintenance in an antistatic room Ensure that all the components screws and insulators are properly installed after maintenance or calibration Ensure that all the cables are properly connected Ensure that the soldering should comply with the environmental requirements and is lead ...

Page 8: ...exploded view is only applied to show phone frame It is not regarded as a reference for applying spare parts No Description Quantity 1 WiFi Antenna 1 2 Battery Cover 1 3 Battery 1 4 Bolt 7 5 Back Cover 1 6 Main Antenna 1 7 Diversity Antenna 1 8 Water Proof Label 1 9 Main Board 1 10 Front Cover 1 11 Power Button Dome 1 12 Reset Button Dome 1 2 3 10 11 5 6 1 4 7 9 12 8 ...

Page 9: ...0MHz Failure Symptom TX failure U3601 Voltage Regulator Failure Symptom RF Failure WCDMA X4001 Crystal Osillator 26MHz Failure Symptom WiFi Failure U4102 RF Switch Failure Symptom WiFi Failure U4001 WIFI IC Failure Symptom WiFi Failure Z4101 Ceramics Filter 2450MHz Failure Symptom WiFi Failure U901 Duplexer W2100MHz W900MHz Failure Symptom RF Failure U101 RF Transceiver Failure Symptom RF Failure ...

Page 10: ...ulti band RF Transceiver U101 35020094 Consumable Chip Hi6481RBCV150 TFBGA 3 3 5V Average Input Current Limit Six Bucks E5 U201 40060266 MCP 1Gb 128Mb 8 NAND FLASH 166MHz 128KB 1 8V FBGA107 Pb free 512Mb 32Mb 16 DDR U301 47100306 Power Module 1920 1980MHz 27dB 28dBm QFN 1000V U401 13080065 Duplexer TX 1920 1980MHz RX 2110 2170MHz 1 8dB 2 2dB 50dB 42dB 2520 U402 47140042 0 5 3GHz SPDT 0 46 22 TSSON...

Page 11: ...6MHz 12pF 10ppm 50ohm SMD3225 X3901 13010186 SAW FILTER 1950 2 9 Z401 13010253 SAW Filter 881 5MHz 942 5MHz 2 5dB 3 0dB 50V 1814 Z601 13010176 SAW filter 2140MHz 1 9dB 1 4 1 1mm Z602 13010189 SAW FILTER 897 5MHz 2 7dB 100V MM SFLT5 0101 Z1201 Z701 13010174 SAW Filter 836 5MHz 2 1dB 50V 1 4 1 1mm TS16949 Z702 13010320 SAW Filter 881 5MHz 942 5MHz 2 5dB 3 2dB 50V 1814 Z801 13010321 SAW Filter 1842 5...

Page 12: ...Fi Firmware v3 6 exe Firmware software The client software is just for you information please download the newest software to upgrade Upgrade mode Normal upgrade Force upgrade Upgrade condition Computer Windows XP Windows 7 Vista USB data cable BOM 02450760 5 2 Hardware connection 5 3 Client Software Installation 1 Power on the E5331 2 Connect the E5331 to the PC with USB data cable 3 Double click...

Page 13: ...E5331 Maintenance Manual Basic Version V1 0 Internal 2012 4 21 Huawei confidential No spreading without permission Page 13 of 57 ...

Page 14: ...E5331 Maintenance Manual Basic Version V1 0 Internal 2012 4 21 Huawei confidential No spreading without permission Page 14 of 57 4 Click Next to continue 5 Click I Agree to continue ...

Page 15: ...E5331 Maintenance Manual Basic Version V1 0 Internal 2012 4 21 Huawei confidential No spreading without permission Page 15 of 57 ...

Page 16: ...E5331 Maintenance Manual Basic Version V1 0 Internal 2012 4 21 Huawei confidential No spreading without permission Page 16 of 57 6 Click Install to continue ...

Page 17: ...E5331 Maintenance Manual Basic Version V1 0 Internal 2012 4 21 Huawei confidential No spreading without permission Page 17 of 57 7 The installation is completed Click Finish to close the window ...

Page 18: ...21 Huawei confidential No spreading without permission Page 18 of 57 8 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: ... Version V1 0 Internal 2012 4 21 Huawei confidential No spreading without permission Page 19 of 57 5 4 Update Procedure Please install the client software before upgrade After updated successfully please restore the factory settings ...

Page 20: ... No spreading without permission Page 20 of 57 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 ...

Page 21: ...oot 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 Reset your Data Card to restore default settings Then you can test the function of your data card Caution you must restore default settings of your data card before you test functions of the data card ...

Page 22: ...t permission Page 22 of 57 5 5 Check the Software Version Verify the FW version from WebUI You may visit http 192 168 1 1 1 Log_in 2 Check Version for E5331 5 6 Exception Handling Failure Type Ensure that Can not connect the wireless modem The wireless modem is power on The client software is installed ...

Page 23: ...Internal 2012 4 21 Huawei confidential No spreading without permission Page 23 of 57 Failure Type Ensure that Upgrade software failure Open the upgrade software is correctly You can restart the PC and the wireless modem to try the download again ...

Page 24: ...lication 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 Name soldering fixture Application It is used to fix the main board Name lead free solder wire Application It is used for soldering Name digital multimeter Application It is used for measuring during maintenance ...

Page 25: ...ential No spreading without permission Page 25 of 57 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: ...Huawei confidential No spreading without permission Page 26 of 57 7 Disassembly Procedure 4 Remove the battery 3 Remove the battery cover 2 Disassemble procedure of the E5331 is shown below 1 Make sure the ESD antistatic wrist strap connect to the ground is normal ...

Page 27: ...n V1 0 Internal 2012 4 21 Huawei confidential No spreading without permission Page 27 of 57 8 Disassembly procedure of the E5331 is completed 7 Remove the main board 6 Loosen the Front cover Remove the Front cover 5 Remove the seven screws ...

Page 28: ...1 Huawei confidential No spreading without permission Page 28 of 57 8 Assembly Procedure 4 Install the back cover 3 Install the main board 2 Assembly procedure of the E5331 is shown below 1 Make sure the ESD antistatic wrist strap connect to the ground is normal ...

Page 29: ...al Basic Version V1 0 Internal 2012 4 21 Huawei confidential No spreading without permission Page 29 of 57 8 Assembly procedure of the E5331 is completed 7 Install the battery cover 6 Install the battery 5 Install the screw ...

Page 30: ...ore 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 9 1 Principle Instruction E5331 includes the following modules WLAN baseband sub system AR6063 Power Management Module Hi6481 Memory module MCP The baseband processing module Hi6755 RF module transceiver module Hi6331 ...

Page 31: ... Maintenance Manual Basic Version V1 0 Internal 2012 4 21 Huawei confidential No spreading without permission Page 31 of 57 9 2 No Power on 9 2 1 No Power On High Current DC Power Supply Reference Figure 9 1 ...

Page 32: ...t Replace the U3801 N Y Measure J3801 pin3 whether is short N Remove the L3601 then check if it is not short Replace the U401 U501 N Y Remove the U3501 then check if it is not short Replace the U3501 N Y Remove the U3601 then check if it is not short Replace the U3601 N Y Replace the U4001 Remove the U801 then check if it is not short Replace the U801 N Y Y Replace the C3811 C3810 C3806 ...

Page 33: ...tenance Manual Basic Version V1 0 Internal 2012 4 21 Huawei confidential No spreading without permission Page 33 of 57 J3801 U3101 U3501 L3601 U4001 J3701 U3201 U501 U401 U801 TCXO301 U101 J3702 Figure 9 1 U3801 ...

Page 34: ...ignal value of the X3501 is normal Replace the X3501 Replace U3201 check whether it is normal Replace the U3101 Y N Measure whether output voltages of the U3501 are normal Y Replace the U3501 N N End Y Download the latest software version check whether it is normal End N Y U201 Output Reference Value Test Point VDD_2V6 2 6V C3512 LDO5 C3507 VDD_PMU 3 1V C3533 V_CORE_1V8 1 8V C3505 VREF 2 6V C3514 ...

Page 35: ... 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 C3512 VDD_2V6 2 6V C3502 VDD_1V2C 1 2V C3522 VDD_PMU 2 85V C3504 VDD_1V2T 1 2V C3507 LD05 C3505 V_CORE_1V8 1 8V C3521 VBUCK5 3 1V C3514 VREF 2 6V C3511 VDD_2V8 2 8V C3513 VREG_SIM 3 3V 1 8V C3505 VOUT12 3 3V C3510 V_TCXO_2V85 2 85V C3503 VDD_1V8 1 8V C3536 VSYS Figure 9 2 ...

Page 36: ...ading without permission Page 36 of 57 9 3 Charge Failure Reference Figure 9 3 Charge Failure Measure if the voltage of VBAT is 3 4 4 2V Replace the U3801 Replace the U3101 Insert charger Y N Measure if the voltage of VBUS is 5V Y Replace the J3701 N J3801 U3101 J3701 J3702 U3801 Figure 9 3 ...

Page 37: ...igure 9 4 SIM card failure Check whether Socket is in good condition soldering Y Re solder replace socket N Measure whether the C3416 C3513 C3702 C3719 R3701 R3707 RV3705 RV3706 RV3707 RV3 708 Are normal Replace the faulty components Replace the U3101 Y N Insert a normal SIM card Measure whether the supply voltage of the SIM card is normal Replace the U3501 Y N ...

Page 38: ...ermission Page 38 of 57 9 5 Data Communication Failure Reference Figure 9 5 Figure 9 4 R3707 Resistor C3713 Capacitor R3701 Resistor RV3708 Varistor C3416 Capacitor C3719 Capacitor C3702 Capacitor RV3705 Varistor RV3707 Varistor RV3706 Varistor R3312 Resistor C3718 Capacitor R3313 Resistor C3717 Capacitor ...

Page 39: ...place the U3101 Check whether J3701 is normal Y Replace the J3701 N Measure whether the RV3703 RV3704 C3720 C3721 C3705 C3706 L3701 L37 02 are normal Replace the faulty components N Y J3701 Figure 9 5 L3701 Inductor 15nH L3702 Inductor 15nH RV3704 Varistor RV3703 Varistor C3705 Capacitor 1 8pF C3706 Capacitor 1 8pF C3720 Capacitor 6 8pF C3721 Capacitor 6 8pF ...

Page 40: ...ay Failure Reference Figure 9 6 Display Failure Replace the LED check whether it is normal End Replace the U3101 Y N Measure whether power supply voltage of the LED is normal Check the battery Replace the U3801 N Y Measure whether the R3908 R3909 R3914 R3910 R3911 R391 5 Q3902 Q3903 Q3904 Q3905 are normal Replace the faulty components N Y ...

Page 41: ... 0 Internal 2012 4 21 Huawei confidential No spreading without permission Page 41 of 57 Figure 9 6 R3909 Resistor 220Ω Q3902 R3908 Resistor 300Ω Q3905 Q3903 Q3904 R3910 Resistor 300Ω R3911 Resistor 220Ω R3914 Resistor 300Ω R3915 Resistor 300Ω ...

Page 42: ...ck whether WLAN antenna are normal Replace the antenna Check whether J4101 Z4101 are normal Replace the faulty components Replace the U3101 Y N N Replace U4102 Check whether it is normal End Y Y N Measure whether output signal value of the X4001 is normal Replace the X4001 N Replace U4001 check whether it is normal End Y Y N Upgrade the software Then inspect if it is normal End N Y ...

Page 43: ... V1 0 Internal 2012 4 21 Huawei confidential No spreading without permission Page 43 of 57 Z4101 X4001 Figure 9 7 U4102 U4001 C4007 U4001 Power supply VDD_3V3_WIFI J4101 C4012 U4001 Power supply VDD_1V8_WIFI C4004 U4001 Power supply DVDD12 ...

Page 44: ...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 Y END Check whether antenna are normal N N Replace The antenna Replace Z603 Check whether It is normal Y Y END Replace U801 Check whether It is normal N Y END Replace U101 N ...

Page 45: ...E5331 Maintenance Manual Basic Version V1 0 Internal 2012 4 21 Huawei confidential No spreading without permission Page 45 of 57 Figure 9 8 ...

Page 46: ...6 of 57 9 8 2 RF Receiving Failure WCDMA 900MHz Reference Figure 9 8 Receiving Failure WCDMA9000MHZ Update the sofeware Then inspect if it is normal Y END Check whether antenna are normal N N Replace The antenna Replace Z603 Check whether It is normal Y Y END Replace U801 Check whether It is normal N Y END Replace U101 N ...

Page 47: ... Page 47 of 57 9 8 3 RF Receiving Failure GSM Reference Figure 9 8 Receiving Failure GSM Update the sofeware Then inspect if it is normal Y END Check whether antenna are normal N N Replace The antenna Replace Z604 Z605 Check whether It is normal Y Y END Replace U801 Check whether It is normal N Y END Replace U101 N ...

Page 48: ...ansmitting Failure WCDMA2100MHZ Update the sofeware Then inspect if it is normal Y END Check whether antenna are normal N N Replace The antenna Replace J801 Check whether It is normal Y Y END Replace U801 Check whether It is normal N Y END Replace U402 Check whether It is normal N Y END Replace U401 Check whether It is normal N Y END Replace Z401 Check whether It is normal N Y END Replace U101 N ...

Page 49: ...nsmitting Failure WCDMA2100MHZ Update the sofeware Then inspect if it is normal Y END Check whether antenna are normal N N Replace The antenna Replace J801 Check whether It is normal Y Y END Replace U801 Check whether It is normal N Y END Replace U502 Check whether It is normal N Y END Replace U501 Check whether It is normal N Y END Replace Z501 Check whether It is normal N Y END Replace U101 N ...

Page 50: ...ference Figure 9 8 Transmitting Failure GSM Update the sofeware Then inspect if it is normal Y END Check whether antenna are normal N N Replace The antenna Replace J801 Check whether It is normal Y Y END Replace U801 Check whether It is normal N Y END Replace U703 Check whether It is normal N Y END Replace Z701 Z702 Check whether It is normal N Y END N Replace U101 ...

Page 51: ...E5331 Maintenance Manual Basic Version V1 0 Internal 2012 4 21 Huawei confidential No spreading without permission Page 51 of 57 10 Weld Points Indicator Chart for PCB GND Empty point ...

Page 52: ...E5331 Maintenance Manual Basic Version V1 0 Internal 2012 4 21 Huawei confidential No spreading without permission Page 52 of 57 GND Empty point ...

Page 53: ...E5331 Maintenance Manual Basic Version V1 0 Internal 2012 4 21 Huawei confidential No spreading without permission Page 53 of 57 GND Empty point ...

Page 54: ...E5331 Maintenance Manual Basic Version V1 0 Internal 2012 4 21 Huawei confidential No spreading without permission Page 54 of 57 11 Functional Test 11 1 Appearance Introduction ...

Page 55: ...the E5331 WEB page or directly use the default settings and set up a network connection Then you can send or receive E mail access the network through wireless connection and download files through wireless data channels One device access via USB 11 2 2Wireless Modem 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 wirel...

Page 56: ...Maintenance Manual Basic Version V1 0 Internal 2012 4 21 Huawei confidential No spreading without permission Page 56 of 57 Multi device access via Wi Fi Multi device access via Wi Fi and USB at the same time ...

Page 57: ...tenance Manual Basic Version V1 0 Internal 2012 4 21 Huawei confidential No spreading without permission Page 57 of 57 11 3 Internet Test For details of network connection settings Please refer to Product Manual ...

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