Huawei g630 Repair Manual

G630-U10 Simplified Maintenance Manual

Issue 01

Date

HUAWEI TECHNOLOGIES CO., LTD.

Issue 01 (2014-04-01) Huawei Proprietary and Confidential

Copyright © Huawei Technologies Co., Ltd.

i

Copyright © Huawei Technologies Co., Ltd. 2014. All rights reserved.

No part of this document may be reproduced or transmitted in any form or by any means without prior

written consent of Huawei Technologies Co., Ltd.

Trademarks and Permissions

and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd.

All other trademarks and trade names mentioned in this document are the property of their respective

holders.

Notice

The purchased products, services and features are stipulated by the contract made between Huawei and

the customer. All or part of the products, services and features described in this document may not be

within the purchase scope or the usage scope. Unless otherwise specified in the contract, all statements,

information, and recommendations in this document are provided "AS IS" without warranties, guarantees or

representations of any kind, either express or implied.

The information in this document is subject to change without notice. Every effort has been made in the

preparation of this document to ensure accuracy of the contents, but all statements, information, and

recommendations in this document do not constitute a warranty of any kind, express or implied.

Huawei Technologies Co., Ltd.

Address: Huawei Industrial Base

Bantian, Longgang

Shenzhen 518129

People's Republic of China

Website: http://www.huawei.com

Email: [email protected]

http://www.huawei.com/

mailto:[email protected]

G630-U20 Simplified Maintenance Manual About This Document


Copyright © Huawei Technologies Co., Ltd..

ii

About This Document

Author

Prepared by Date 2014-02-28

Reviewed by Date 2014-02-28

Approved by Date 2014-02-28

Change History

Date Version Description Author

2014-02-28 V1.0 Released the first

issue.

G630-U20 Simplified Maintenance Manual Contents



iii

Contents

About This Document .................................................................................................................... ii

1 Overview ......................................................................................................................................... 1

1.1 Applicable Scope .............................................................................................................................................. 1

1.2 Brief Introduction ............................................................................................................................................. 1

1.3 How to Obtain Product and Maintenance Information .................................................................................... 1

2 Product Overview ......................................................................................................................... 2

2.1 Appearance ....................................................................................................................................................... 2

2.2 Specifications ................................................................................................................................................... 2

3 Exploded View and Components on the PCBA ...................................................................... 4

3.1 Exploded View ................................................................................................................................................. 4

3.2 Components on the PCBA and BOM ............................................................................................................... 6

4 Software Upgrade ......................................................................................................................... 9

4.1 Selecting the Operation Type and the BIN File to Load................................................................................... 9

4.2 Home Screen .................................................................................................................................................. 11

4.3 Screen Element Description ........................................................................................................................... 11

4.3.1 Title Bar ................................................................................................................................................ 11

4.3.2 Scan && Download Button .................................................................................................................. 11

4.3.3 Remove Devices Button ........................................................................................................................ 13

4.4 Procedure ....................................................................................................................................................... 14

4.5 (Important) Be Cautious to Allow a Second-time Upgrade............................................................................ 14

4.6 Software Downloading Types ........................................................................................................................ 14

4.7 Using the microSD Card for an Upgrade ....................................................................................................... 15

4.8 Troubleshooting Upgrade Failures ................................................................................................................. 19

5 Maintenance Tools ...................................................................................................................... 20

6 Disassembly Procedure .............................................................................................................. 22

7 Assembly Procedure ................................................................................................................... 27

8 Troubleshooting Common Faults ............................................................................................ 31

8.1 Startup Failure ................................................................................................................................................ 31

8.2 Charging Failure ............................................................................................................................................. 36

8.3 Camera Failure ............................................................................................................................................... 37

G630-U20 Simplified Maintenance Manual Contents



iv

8.4 Connection Failure Between the Phone and Computer .................................................................................. 38

8.5 Call Receiving Failure .................................................................................................................................... 39

8.6 Call Sending Failure ....................................................................................................................................... 40

8.7 Vibration Failure ............................................................................................................................................ 41

8.8 Ringtone Failure ............................................................................................................................................. 42

8.9 LCD Display Failure ...................................................................................................................................... 43

8.10 Key Failure ................................................................................................................................................... 44

8.11 No Sound Coming from the Headset During a Call ..................................................................................... 45

8.12 T-Flash Card Detection Failure .................................................................................................................... 46

8.13 GPS Signal Reception Failure ...................................................................................................................... 47

9 Functional Tests........................................................................................................................... 49

9.1 MMI Test ........................................................................................................................................................ 49

9.2 Wi-Fi Test ....................................................................................................................................................... 59

9.3 Voice Call Test ................................................................................................................................................ 60

G630-U20 Simplified Maintenance Manual 1 Overview



1

1 Overview

1.1 Applicable Scope

The G630-U10 Maintenance Manual (Template) is available in the simplified and advanced

versions. The two versions are respectively applicable to common service centers and

advanced service centers authorized by Huawei. The simplified version (this document)

provides maintenance and repair instructions for technicians at common service centers to

conduct services of level 1 and level 2. Being Huawei proprietary, this document is accessible

only for authorized service centers. Although every effort was made to ensure the accuracy of

the document, errors may still exist. If you find any errors or have any suggestions, please

report them through Huawei service platform ComPartner.

1.2 Brief Introduction

This document introduces the product features, mechanical parts, assembly and disassembly

procedures, and common troubleshooting methods. You will be able to clear common faults of

the product with this document.

1.3 How to Obtain Product and Maintenance Information

To obtain product and maintenance information, visit Huawei service website. You are

recommended to install the ComPartner to download maintenance required software tools and

the phone version software.

To obtain the ComPartner installation package, log in to

http://support.huaweidevice.com/service/, search for ComPartner. You will find the

installation package.

http://support.huaweidevice.com/service/

G630-U20 Simplified Maintenance Manual 2 Product Overview



2

2 Product Overview

2.1 Appearance

Error! Reference source not found. shows the appearance of the HUAWEI G630-U10 mobile

phone (G630-U10 for short).

Figure 2-1 G630-U10

2.2 Specifications Table 2-1 lists the G630-U10 specifications.

G630-U20 Simplified Maintenance Manual 2 Product Overview



3

Table 2-1 G630-U10 specifications

No. Description

Mobile phone model Touchscreen smartphone

Dimensions (H x W x D) 143 mm x 71.8 mm x 8 mm

Weight About 155 g (including the battery)

Working band GSM: 850/900/1800/1900M

UMTS: 900/2100M

External ports Standard micro USB port, microSD card slot, 3.5 mm headset jack

UIM card interface Two standard 6-pin UIM card slots

microSD card 32 GB

USB interface USB 2.0, high speeds of up to 480 Mbit/s

Battery Capacity: 2000 mAh

Display 5-inch HD display, 720x1280 resolution

Antenna Built-in antenna

Camera Rear camera: 8 MP pixels; Front camera: 1 MP

Sensors Accelerator, proximity sensor, and ambient light sensor

Test the Bluetooth. Bluetooth v2.1 + EDR

Wi-Fi 802.11b/g/n, Wi-Fi routing

GPS GPSone

Power supply 100–240 V, 50/60 Hz, 1 A

Temperature Operating temperature: 0°C to +40°C

Storage temperature: –40°C to +70°C

Humidity Working humidity: 5% to 95% RH

G630-U20 Simplified Maintenance Manual 3 Exploded View and Components on the PCBA



4

3 Exploded View and Components on the PCBA

3.1 Exploded View

Figure 3-1 shows the exploded view of the G630-U10.

Figure 3-1 Exploded view

Table 3-1 lists components in the exploded view.

Table 3-1 Components in the exploded view

No. Name

1 Receiver decoration

2 TP

3 LCD

4 Proximity sensor rubber

5 Front cover assembly




5

No. Name

6 Proximity sensor FPC

7 Proximity sensor support

8 Speaker FPC

9 Receiver

10 Front camera

11 Rear camera

12 PCBA assembly

13 CPU shielding cover

14 RF shielding cover

15 Side key FPC

16 Motor

17 Battery

18 Speaker

19 Battery support assembly

20 Back cover assembly

21 Main antenna

22 GPS antenna

23 Wi-Fi antenna

24 Phone label

25 NFC antenna

26 Battery cover assembly

27 Two screws for fastening the battery steel plate

28 15 screws for fastening the phone




6

3.2 Components on the PCBA and BOM

Figure 3-2 Layout of components and relevant failures (top)

J2101 rear camera slot

Fault symptom:Rear camera fault

J1701 speaker spring

Fault symptom:Speaker fault

U2002 backlight IC

Fault symptom:LCD fault

U2003 LCD positive/negative voltage IC

Fault symptom:LCD fault

U2202 gravity sensor

Fault symptom:Gravity sensor fault

U3201 RF IC

Fault symptom:RF fault

J1901 headset jack

Fault symptom:Headset fault

J2102 front camera slot

Fault symptom:Front camera fault

U201 power management chip

Fault symptom:Startup failure

U701 CPU chip


X201 19.2M oscillator


HD1G630P proximity sensor FPCFault symptom:Proximity/Ambient light sensor fault

J2404 6-pin connector

Fault symptom:Volume key fault, key startup failure, motor fault

U3801 WTR2605-RF chip


MIC1801 main microphone

Fault symptom:No voice transmitted or noice transmitted

U1500 EMM+DDR chip


U3301 RF PA


LED2201 tri-color indicator

Fault symptom:Indicator fault




7

Figure 3-3 Layout of components and relevant failures (bottom)

Table 3-2 is provided for your reference only. It is subject to changes without notice. Obtain

the latest BOM information from Huawei TCS system. For details about how to query a BOM

code, see the simplified version.

Table 3-2 lists the BOM information about key components on the PCBA.

Table 3-2 BOM code list

Position BOM Description

X201 1202021

5

Crystal Unit,19.2MHz,7pF,+/-10ppm,70ohm,2.5*2.0*0.9mm,NTC internal,Terminal

Dedicated

U201 3920057

2 Power Management IC(PM8110),3.0~4.4V,118WLNSP(pb-free),Terminal Dedicated

U701 3920057

4

Terminal Baseband process IC,WCDMA/GSM dualmode baseband

processor,1.2V/1.8V/2.85V,488NSP,Terminal Dedicated

U1500 4006054

3

MCP,4GB(x8) eMMC,52MHz,1024KB,3.3V/1.8V,FBGA162,8Gb(x32)

LPDDR2,Terminal Dedicated

J5003 5004WLAN/BT antenna springFault symptom:WLAN/BT fault

U4701WLAN/BT/FM IC

Fault symptom:WLAN/BT/FM fault

J1601 battery connector


J2302 TF card slot

Fault symptom:TF card detection failure

J2303 SIM card slot

Fault symptom:SIM card detection failure

J2301 SIM card slot

Fault symptom:SIM card detection failure

J2001 LCD connector to the peer board

Fault symptom:LCD display fault

J3201 RF connector


J5001 J5002 GPSantenna spring

Fault symptom:GPS fault

J2501 TP connector

Fault symptom:TP failure

MIC1802 secondary microphone

Fault symptom:No voice transmitted, or noise transmitted

J2401 motor

Fault symptom:No or weak vibration

LED2101 flashlight

Fault symptom:Flashlight fault

U2801 NFCmodule

Fault symptom:NFC malfunctional

J5005 J5006 main antenna spring

Fault symptom:No or weak signal

J1602 USBconnector

Fault symptom:No charging or USB communication fault




8

Position BOM Description

U3801 3920043

9

Terminal Baseband process IC,RF Transceiver

WTR2605 -2.2V/1.8V/1.3V-62-WLNSP-Terminal Dedicated

J1601 1424057

6 Card Block Connector,BTF Connector,3*2,Female,1.3mm,Terminal Dedicated

J1701 5162102

3 108-5785,Ground Spring,U1250

MIC1801 2205009

9 Microphone,-42dB.,3.76*2.95*1.1mm,silicon

J2102 1424049

6 BTB Connector,Female,24Pin,0.4mm,SMT,Mating Height 0.8mm,Terminal Dedicated

J2404 1424078

0

Card Socket,Spring Contact,6PIN,Horizontal,Center Line Spacing 1.6mm,Pin Tail

Length 0.4mm,SMT,Terminal Dedicated

U2101 3911080

0

Switching Regulators,1.5A LED Flash Driver

IC,2.5V~5.5V,1.5A,4MHz,CSP-9,Terminal Dedicated

U2201 3814009

8 Semiconductor Sensor,Accelerometer,LGA,3axis,Terminal Dedicated

J2101 1424057

9 BTB Connector,BTBconnector,34PIN,0.4mm,0.8mm,SMT,female,Terminal Dedicated

J2501 1424083

1

FPC Connector,8,0.5mm,0.5mm,Back Lock&Double Touch,0.8mm,Terminal

Dedicated

J1901 1424083

0

Earphone Connector,12.66*6.7*4.2,6Pin,Arc,SMT,Reverse plate (pin inside plate

distance to the flat top surface 1.65mm),Terminal Dedicated

J5004 5162498

9 Edge mini Groung Spring

U4701 3921016

0

Connectivity IC,Wireless Connectivity WCN3620,2.05V~2.17V,62-WLNSP,Terminal

Dedicated

J2302 1424070

8

Card Connector,MicroSD card Connector,8PIN,Horizon,1.1mm,hinge type,without

post,Terminal Dedicated

J2301 1424077

2

Card Socket,Micro SIM Socket,8Pin,Horizontal,2.54mm,Without Hold

Peg,PUSH-PULL,height 1.3mm,Terminal Dedicated

J2001 1424057

9 BTB Connector,BTBconnector,34PIN,0.4mm,0.8mm,SMT,female,Terminal Dedicated

J3201 1424000

4 Coaxial Connector,RF Switch,Straight,Female,SMT,Terminal Dedicated

J5001 5162498

9 Edge mini Groung Spring

G630-U20 Simplified Maintenance Manual 4 Software Upgrade



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4 Software Upgrade

4.1 Selecting the Operation Type and the BIN File to Load

After WH62406270ML01Ver1006 is run, the following dialog box is displayed.

Figure 4-1 Entering the login password

Enter the password (initial password: Huawei) and click OK.




10

Figure 4-2 Selecting the BIN file and configuration file

In this dialog box, you can select whether to allow a second-time upgrade and select the BIN

(Firmware) file and the configuration file to be loaded.

1. Select the operation type.

Under Be cautious to select, select or deselect Allow upgrade for the Second time to

allow or prohibit a second phone board upgrade.

If the board software is burned and then mounted, do not select this option, and ensure that the board has

just loaded with the BOOT file with the JTAG tool and does not have APP.

In a normal upgrade after printing rear labels, select this option; otherwise, file loading will fail.

Selection or deselection of this option may affect the NV data status of the phone. Be cautious to confirm

the operation in the displayed dialog box.

2. Select the file to load.

Under Please Select File, the browse button is unavailable and the file path is cleared if

the check boxes are deselected.

3. Once selecting a check box, an Open dialog box is displayed, asking you to select a BIN

file. After you select a file, its path information will be displayed in the text box and the

browse button will be available. When the check box is selected and the browse button is

available, you can click the button to change the file path.

4. The default configuration file PhoneMultiUpgradeDefaultCfg.xml (Windows phones

and some other products possibly cannot use the default configuration file, and therefore

a customized configuration file needs to be provided) and the software executable file

WH62406270ML01Ver1003(SmartPhone).xml are in the same directory level.

5. Select Next to navigate to the Home screen.

6. To cancel or exit the software, select Cancel.




11

4.2 Home Screen

After you click Next, the screen shown in Figure 4-3 is displayed.

Figure 4-3 Home screen

4.3 Screen Element Description

4.3.1 Title Bar

The title bar displays the software name, version, feature code, and compilation date from left

to right.

The feature code is automatically generated by the software based on the configuration file, and is

intended only for check by R&D personnel.

4.3.2 Scan && Download Button

After clicking the Scan && Download button (before loading a file, ensure that ports have

been correctly mapped; otherwise, loading will fail), the application scans for the mapped

ports (the names of ports to search for are specified in the configuration file) in Device

Manager and start loading software. The port numbers of the found ports are displayed on the

list. You can click Scan && Download several times until the ports of all the UEs are found.




12

Figure 4-4 During an upgrade process

During the software upgrade, do not close the application; otherwise the dialog box shown in

Figure 4-5 will be displayed.

Figure 4-5 Closing the application during an upgrade

Do not terminate the application forcibly during an upgrade through measures such as the

Windows Task Manager. Otherwise, the tested boards may get damaged.




13

Figure 4-6 Restoring NV after loading (not required for some products)

Figure 4-7 Successful downloading

4.3.3 Remove Devices Button

You can click Remove Devices to remove phones only after all phones are upgraded.

The Remove Devices button will clear all current screen display, preparing for the next

upgrade.




14

4.4 Procedure

Prepare the required environment and ensure that ports for all phones have been correctly

mapped in Device Manager. Then, click the Scan && Download button. If not all ports are

found after a click, perform several more clicks. During an upgrade, the upgrade progresses of

different phones may be different. When stable phone hot swapping is supported, especially if

several phones need to be hot swapped (unstable hot swapping may cause problems such as

computer down), first remove phones that have been upgraded successfully without affecting

phone being upgraded. This process releases ports for accessing new phones to be upgraded.

After the ports of the new phones are correctly mapped, click the Scan && Download button

again to upgrade the new phones, without affecting other phones being upgraded.

4.5 (Important) Be Cautious to Allow a Second-time Upgrade

Under Be cautious to select, select or deselect Allow upgrade for the Second time to allow

or prohibit a second phone board upgrade. That is, once is selected, a phone to which phone

software has been downloaded can be upgraded for a second time.

If this downloading tool needs to be used for software loading for a phone that is loaded with a BOOT file

with a JTAG tool and with applications with a USB flash driver, do not select the Allow upgrade for the

Second time option. In addition, before using this tool, ensure that the board has just loaded with the

BOOT file with the JTAG tool and does not have APP; otherwise, downloading will fail and a message

Refuse Download In AMSS Fail will be displayed. If this operation is incorrectly selected in this case, it

may result in faulty phones in subsequent work stations.

In a normal upgrade after printing rear labels, select this option; otherwise, the software upgrade will fail

and a message Refuse Download In AMSS Fail is displayed. Before a software upgrade, the phone

software automatically backs up the NV data in the current phone. After the software upgrade, the phone

software will automatically restore the NV data from the backup data. After a later USG upgrade or SD

upgrade, the NV data will also be restored from the backup. The backup data is restored in the NV backup

backup area of the phone. Pay attention to the message in the dialog box that is displayed after you

selecting or deselecting this option, and be cautious to confirm your operation.

4.6 Software Downloading Types

Two software upgrade types are available: software is burned (not supported for smart

phones), and software upgrade. The screens for the two types are similar except for the

messages displayed during interchanges with phones. Differentiate the phones for which

software needs to be burned and the phones for which software needs to be upgraded;

production line stoppage or even accidents may result if the phones are not correctly

differentiated. (The software should be initially started by a PE. Operators must not start it

without permission. If no exception occurs during software downloading, this software does

not need to be shut down.)




15

4.7 Using the microSD Card for an Upgrade

To upgrade the phone using a microSD card:

Step 1 Format the microSD card using FAT32.

Step 2 Create a dload folder in the microSD card's root directory.

Figure 4-8 shows the dload folder under the root directory.

Figure 4-8 dload folder under the microSD card's root directory

Step 3 Copy the upgrade file UPDATE.APP to the dload folder.

Step 4 Insert the microSD card into the phone, power on the phone, and enter *#*#2846579#*#* on

the dialing screen. Touch ProjectMenu > Upgrade > SD card upgrade > Confirm.




16

Figure 4-9 Operation procedure




17

The upgrade progress is displayed on the phone screen, as shown in Figure 4-10.




18

Figure 4-10 Upgrade process

After the upgrade is complete, restore the phone to its factory settings and check whether the

software version is correct.

If the phone cannot be powered on, use either of the following methods to perform a forcible

upgrade:

Install the battery to the phone (if the phone screen flashes, remove the battery from the phone

and install it again after 5 minutes). Press and hold the volume up and down keys, and then

press the power key. The phone automatically starts a forcible upgrade. The upgrade process

displayed on the phone screen is the same as that shown in Figure 4-9.

Remove the battery from the phone. Press and hold the volume up and down keys, and

connect the charger to the phone. The phone automatically starts a forcible upgrade. The

upgrade process displayed on the phone screen is the same as that shown in Figure 4-9.




19

4.8 Troubleshooting Upgrade Failures

Table 4-1 Upgrade failures and solutions

Failure Solution

(Computer) Failed to

detect the phone's

presence

Check whether there is any other driver conflicting with the USB

upgrade driver.

Check whether the USB upgrade driver has been installed

properly.

Check whether the USB cable has been properly connected.

Check whether the serial port settings are correct.

Failed to upgrade the

phone using the USB

cable.

Check whether the USB cable has been properly connected.

Check whether the target firmware version is higher than the

original one.

Perform the upgrade again.

Fail to upgrade the

phone using the

microSD card.

Check whether the upgrade file is correct.

Check whether the upgrade method is correct.

Check whether the microSD card functions properly.

Perform the upgrade again.

G630-U20 Simplified Maintenance Manual 5 Maintenance Tools



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5 Maintenance Tools

Name: soldering iron

Usage: solders components

Name: DC power supply

Usage: supplies power

Name: soldering fixture

Usage: secures PCBAs

Name: lead-free tin solder wire

Usage: solders components

Name: digital multimeter

Usage: measures parameters during maintenance

G630-U20 Simplified Maintenance Manual 5 Maintenance Tools



21

Name: toolkit

Usage: assembles and disassembles terminals

Name: electric screwdriver

Usage: fastens and removes screws

G630-U20 Simplified Maintenance Manual 6 Disassembly Procedure



22

6 Disassembly Procedure

4. Place the mobile phone on a flat panel, press

the phone with your left hand, hold the electric

screwdriver with your right hand, and remove all

the 15 screws one after another.

3. Check the quantity and positions of screws on

the rear cover. There are 15 Phillips screws.

2. Hold the phone with your right hand, lever up the

hand hole on the battery cover with your left thumb to

open the battery cover.

1. Ensure that the ESD wrist strap is properly

grounded.




23

10. Lever up the battery steel plate with a crowbar

and remove the battery assembly.

9. Lever up the battery BTB connector with a

crowbar and remove the battery BTB connector.

8. Check the positions of the two screws that are

used to connect the battery and the front cover,

place the phone on a flat panel, press the phone with

your left hand, hold the electric screwdriver with

your right hand, and remove the two screws.

7. After the rear cover assembly is removed.

6. Use your hands to hold both sides of the rear

cover and remove the rear cover.

5. Check the position of the headset jack. Insert a

finger or a spudger from the upper right corner

into the headset jack, and slide your finger or the

spudger clockwise to release all clips from the

rear cover.




24

14. Hold the phone with your left hand, push

leftwards the PCBA with your right hand to release

clip 1 at the bottom.

13. Remove the rear camera. Use a finger or plastic

tweezers to lever up the rear camera and finally to

separate the camera from the front cover.

12. Remove the TP FPC ZIF. First, turn on the ZIF

connector switch, use a plastic tweezers to clasp the

FPC two ears, pull the FPC upwards, and remove

the FPC.

11. Lever up the LCD BTB connector with a

crowbar.




25

18. Use a finger or a crowbar to remove the front

camera. Firstly, unfasten the front camera BTB and

then remove the camera.

17. Use a finger or a crowbar to remove the rear

camera. Firstly, unfasten the rear camera BTB and

then remove the camera.

16. Shake the PCBA to release clip 3 on the right

side and finally to separate the PCBA and the front

cover.

15. Hold the phone with your left hand, push

rightwards the PCBA neck position with your right

hand to release clip 2 on the left side.




26

19. End.

G630-U20 Simplified Maintenance Manual 7 Assembly Procedure



27

7 Assembly Procedure

2. Connect the rear camera BTB male and female. Make

sure the connectors are properly fastened and do not bump

the surrounding components.

1. Ensure that the ESD wrist strap is properly

grounded.




28

4. Gently move the PCBA, aligning the positioning hole at

the PCBA bottom with the positioning rod in the lower left

corner of the front cover. Press the positioning hole area in

the lower left corner of the PCBA with your left thumb to

fit the positioning rod in the positioning hole. Press the

board at the clip position to fit the board into the clip with

your right thumb.

3. Connect the front camera BTB male and female.

Make sure the connectors are properly fastened and

do not bump the surrounding components.




29

8. Use the tweezers to take the anti-dismantle label

and attach it to its specified position on the rear

cover. Use a cotton swab to gently press the

anti-dismantle label, ensuring that the label is

securely attached.

7. Install the15 screws clockwise, starting from the

headset jack.

6. Use an electric screwdriver to install screws for fastening

the front cover and the battery.

5. Fasten the LCD BTB and TP BTB to the PCBA,

without touching other components. Install the

battery and engage it into the BTB connector.




30

9. Assemble the battery cover.

G630-U20 Simplified Maintenance Manual 8 Troubleshooting Common Faults



31

8 Troubleshooting Common Faults

Before you repair a G630-U10, back up the user data and restore the phone to its factory settings.

8.1 Startup Failure

Most power-on failures are caused by power supply exceptions. Therefore, you can rectify

power-on failures by troubleshooting power supply circuit faults. Power-on failures are

divided into the following types:

No current: After you connect the phone to the DC power supply and power on the

phone, the reading on the power supply ranges from 0 mA to 5 mA.

Weak current: After you connect the phone to the DC power supply and power on the

phone, the reading on the power supply ranges from 5 mA to 100 mA.

Excessive current: After you connect the phone to the DC power supply and power on

the phone, the reading on the power supply exceeds 300 mA.

If the G630-U10 fails to be powered on, observe the power-on current reading on the DC

power supply to identify the fault.

No current




32

Figure 8-1 Troubleshooting startup failures with no current

This situation occurs when the main power circuit is short-circuited. Check whether VBUS and

VPH_PWR circuits are short-circuited.

Weak current

Connect the phone to a

fake battery and

maintenance power supply,

press the power key, and

observe the current

Is the key copper foil

oxidized?

No current

Clean the key

Is the VPH_PWR voltage between

the range from 3.4 V to 4.2 V, and

equal to the maintenance power

voltage?

Check the clock

X201

Check the U201

N

Y

Y

N

Startup failure




33

Figure 8-2 Troubleshooting startup failures with weak current

If the VPH_PWR voltage is normal, but the U201 output is not, the other output of U201 is probably

short-circuited, which results in the power output exception of the PMU. Check every output of the U201

to see whether they are short-circuited.

Excessive current

Connect the phoneto a fake battery and


press the power key, and observe the current

Check whetherU201 haspartial DC-DC voltage output

Weak current

Check the U201

Check whether other U201 outputs

are short-circuited

Resolder theU201

Replace the U201

Y

N

N

Y

Startup failure

Check whether U201 has partial L6/L17voltage output

Check whether EMMC(U1500) is properly

soldered

Replace the U701

Y

Y

Replace the U1500

N




34

Excessive current is usually caused by short-circuited power supply circuits (DC power

supply) which may result in 500 mA or greater current leakage. Mostly this fault occurs when

VBAT is short-circuited to ground.

Figure 8-3 Troubleshooting startup failures with excessive current

Startup failure summary:

1. Current leakage in case of excessive current:

When the phone is connected to a regulated power supply, excessive power such as hundreds

of mA current is generated upon a power-on. This problem usually occurs because the VBAT

is generally short-circuited to the ground. It also may be because the VPH_PWR is

short-circuited to the ground. It is earlier to troubleshoot VBAT short-circuit to the ground,

Connect the phone to a

fake battery and


press the power key, and

observe the current

Check whether pin 1

of J1601 is short-

circuited to the

ground

Excessive current

(>500 mA)

Replace the J1601

Check whether the U201 voltage is

normal

Repair the capacitor

Resolder or replace

the U201

N

Y

N

Startup failure

Check whether the

capacitor connected

to the Vbat is short-

circuited

N

Y




35

since fewer components (PA, antenna switch, and capacitor) are connected to the VBAT. You

can locate the fault by removing the components separately.

If the voltage on the VPH_PWR circuit is short-circuited, the component removal method is

not applicable. Instead, adjust the DC power output voltage to about 3 V, connect the negative

end of the power supply to the PCB negative end, connect the positive end of the power

supply to the detected short-circuit point, touch the PCB with your hand to locate the hot

position after about 20s, and then remove the hot component.

2. Current leakage in case of weak current:

If the power-on current is weak (generally less than 30 mA), usually the power management

chip, PA, or an ESD protection tube is damaged. It may also be because the EMMC fails to

start up and the program fails to run.

3. No or weak current when you press the power key:

If no current is generated, first check whether the power key fails to work. Then, check the

power supply line to the VBAT. If weak current is gated, measure each output voltage of the

power supply IC. If all IC output voltage is 0, this fault is most possibly related to the PM.

4. After you press the power key, the current sharply changes within a range or remains

unchanged at a fixed value:

This problem is usually due to a CPU or PM communication fault.




36

8.2 Charging Failure

Figure 8-4 Troubleshooting charging failures

Y

Chargingfailure

Is J1602poorlysoldered?

Resolder the J1602

Check the U201

N

Y

Y

Is the battery damaged? Change the battery

N

Are the battery connector and the battery are in good

contact

Repair the J1601

N

Is the charger functional?

Replace the charger

N

Y




37

8.3 Camera Failure

Figure 8-5 Troubleshooting camera failures

Y

Camera failure

Is the problem

solved af ter you

replace the

camera?

End

Is the J2101 poorly

soldered?Re-solder or

replace the J2101

Y

N

Y

Is the problem

solved af ter you re-

load the phone

sof tware?

End

Y

N

N

End

Replace the

U701

Replace the

U201

N




38

8.4 Connection Failure Between the Phone and Computer

Figure 8-6 Troubleshooting connection failures between the phone and computer

Connection failure between

the phone and computer

Is the 5-pin mini USB connector poorly soldered?

Resolder the USB connector

Y

Is the problem solved after

you replace the USB cable?End

Y

N

N

Is there voltage at VCHG?

Replace the U201

Y

N

Is the problem solvedafter you reload the

phone software?

End

Y

N

Replace the USB




39

8.5 Call Receiving Failure

Figure 8-7 Troubleshooting call receiving failures

No voice can be heard

af ter a call is set up

Is the problem

solved af ter you

replace the

receiver?

End

Is the insertion of the

headset misjudged?

Replace the

U701

Replace the

headset connector

Y

N

Y

Is the receiver

volume properly set?End

N

N

Y




40

8.6 Call Sending Failure

Figure 8-8 Troubleshooting call sending failures

No voice can be sent

af ter a call is set up

Is the problem

solved af ter you

replace the

microphone?

End

Is the MICBIAS voltage

1.8 V?

Replace the

U701

Check the

U201

N

N

Y

Is the problem


load the phone

sof tware?

End

Y

Y

N




41

8.7 Vibration Failure

Figure 8-9 Troubleshooting vibration failures

No vibration

Is the VIB_DRV_N

voltage equal to

the battery voltage?

Check the U201

Is the problem solved

af ter you replace the

motor?

Check whether the voltage

dif ference meets the

requirement for the motor

operating voltage

End

Y

N

Y

Is the problem


load the phone

sof tware?

End

Y

N

N




42

8.8 Ringtone Failure

Figure 8-10 Troubleshooting ringtone failures

N

No ringtone for

incoming calls

Is the FPC in good contact?Re-crimp or

replace the

FPC



speaker?

Replace the

U701

End

Y

Y

N

Is the problem


load the phone

sof tware?

End

Y

N

N

Is the ringtone

volume properly set? End

N

Y

Is the problem solved af ter

you replace the volume key

sub-board?

EndY




43

8.9 LCD Display Failure

Figure 8-11 Troubleshooting LCD display failures

No display on the LCD


af ter you disassemble the

phone can re-fasten the

LCD BTB connector?

End

Y

N


af ter you re-load the

phone sof tware?

End

Y

N



LCD?

EndY

Replace the

U301

N

N

Is the to-ground-resistanceof T2001/T2002/T2003 is not 0 ohm?

Replace the

U201

Y




44

8.10 Key Failure

Figure 8-12 Troubleshooting key failures

Key failure

Is the problem solved after you

replace the key

FPC?

End

N

Y

Are the key dome sheets in good

contact?

Clean or replace the

key dome

sheets

N

Y

Re-load the phone

software




45

8.11 No Sound Coming from the Headset During a Call

Figure 8-13 Troubleshooting procedure for no sound coming from the headset during a call

No voice can be heard f rom the

headset af ter a call is set up

Is the headset

icon displayed

on the status bar?

Replace the

headset connector



headset?

Replace the

U701

End

Y

Y

N

Is the receiver

volume properly set?End

N

N

Y




46

8.12 T-Flash Card Detection Failure

Figure 8-14 Troubleshooting T-Flash card detection failures

T-Flash card detection failure

Check whether any T-Flash card slot pins are tilted

Replace the slot

Y

Is the problem solved after you replace the

T-Flash card?

EndY

N

N

Replace the Z2302 End

Y

N

Replace the U701




47

8.13 GPS Signal Reception Failure

Figure 8-15 Troubleshooting GPS signal reception failures

GPS signal reception failure

Is the GPS channel poorly soldered?

Re-solder or replace the faulty

component

Y

N

Y

Is the GPS antenna in good

contact with the

spring?

Replace the GPS antenna or spring

N

Re-load the phone software




48

G630-U20 Simplified Maintenance Manual 9 Functional Tests



49

9 Functional Tests

9.1 MMI Test To enter the MMI test mode:

1. Insert the TF card and SIM card (no SIM card insertion is required if the SIM card is

integrated in the phone), install the battery, and power on the phone to enter the Home screen.

2. Enter *#*#2846579#*#* to drive the phone into MMI test mode. Press the volume down

key to start the test. You can touch the menu key to skip the current test or touch the back key

to return to the previous test.

No. Item Step Content Test Method

1 Testing the

SD card 1

Test whether

the SD card

functions

properly.

Insert the SD card and start a power-on test. If the SD card can

be detected, this item passes the test.




50


2

Checking

for the

battery

2

Check

whether the

battery is

in-position.

If the battery is in-position, this item passes the test.

3 Key test 3 Test the keys.

Press or touch all the keys. When a key is pressed or touched,

the color of the corresponding key displayed on the screen will

change. After all keys are tested, press the Volume down key to

start the next test.




51


4 LCD test 4

White screen

Blank screen.

Color screen

Press the volume down key to display the white screen.

Press the volume down key to display the black screen.

Press the volume down key to display triple color bars (red,

green, and blue).




52


5

LCD

backlight

test

5 Test the LCD

backlight.

If the LCD backlight repeatedly turns on and off, the LCD

backlight is normal. Press the Volume down key to start the

next test.

6 Testing the

touchscreen 6

Test the

touchscreen.

Slide your figure along the touchscreen edges in a circle. The

route that your finger passes should turn red. Press the volume

down key to proceed.

7

Tri-color

indicator

test

7

Test the

tri-color

indicator.

The red, blue, and green indicator is lighted cyclically.

8 Testing the

rear camera 8

Test the rear

camera.

Touch the white frame until the white frame turns green. The

preview focus test is successful.




53


9 Testing the

front camera 9

Test the front

camera.

10 Flashlight

test 10

Test the rear

camera

flashlight

function.

Touch the red text position. If the flashlight turns on, this item

passes the test.




54


11

Testing the

proximity

sensor

11

Test the

proximity and

light sensor's

proximity

detection

function.

Place the light shielding plate approximately 4 mm above the

light hole. If the portrait icon changes to an in-call icon, the

function is normal.




55


12 Ambient

light test 12

Test whether

the ambient

light sensor is

functional.

Check whether data of environmental light is detected. If yes,

the test is passed. When the test screen is displayed, orient the

phone front side to the light and block the light sensor using

your hand, the phone automatically detects the light changes

and determines whether the test item passes. If the test item

passes, the phone automatically proceeds to the next test item.

If the phone fails to detect the light changes after you tried

changing the light environment for the phone several times,

touch the menu key to confirm the light sensor failure.

13 Testing the

motor 13

Test the

vibration

motor.

The motor will vibrate intermittently. Press the Volume down

key to start the next test.

14 Testing the

speaker 14

Test the

speakers.

Automatically test the speaker. (Do not insert the headset.) If

the speaker emits pleasant sound during the test, the test passes.

Press the volume down key to start the next test.




56


15 Testing the

receiver 15

Test the

receiver.

If the receiver plays the pre-stored audio file repeatedly, the test

item passes. Press the volume down key to proceed.

16

Main

microphone

test

16 Test the main

microphone

Touch Record. Speak to the microphone, and then touch Play.

If the microphone functions properly, you can hear the voice

recording from the receiver.




57


17

Microphone

loopback

test

17 Test the

microphone.

Touch Record. Speak to the microphone, and then touch Play.

If the microphone functions properly, you can hear the voice

recording from the receiver. Test the secondary microphone and

headset in the same way. Press the Volume down key to start

the next test.

18 FM test 18 Test the FM

module

After a headset is inserted, the phone will search for and play an

FM channel. If you hear the program from the headset, the test

passes.

Press the Volume down key to start the next test.

19

Testing the

headset wire

control

function

19

Test the

control-by-wi

re function of

the headset.

When the headset is inserted into the phone, the in icon on the

test screen turns green; when the headset is removed, the out

icon turns green. In this case, the test item passes. Press the

Volume down key to start the next test.




58


20 Bluetooth

test 20

Test the

Bluetooth.

Automatically test the Bluetooth functions. During the test, the

phone will search for Bluetooth devices, and display the devices

that have been found. Press the Volume down key to start the

next test. (Note: This test requires another device with

Bluetooth enabled.)

21 Tilt sensor

test 21

Test the

gravity

sensing

function.

The LCD displays the current acceleration in the X, Y and Z

axes. If the phone can be placed in a position where the angles

between the phone and the X, Y and Z axes are 45 degrees, the

phone passes this test.




59


22 Wi-Fi test 22

Test the

Wi-Fi

function.

Automatically test the Wi-Fi functions. If the phone receives

Wi-Fi signals properly, it passes the test. Ensure that the phone

under test is within the coverage of a Wi-Fi hotspot.

23 Testing the

SIM card 23

Test the SIM

card.

If a SIM is inserted into the phone and functions properly, the

test item passes. Press the volume down key to view the test

results.

The MMI test is complete, and the test results are displayed on the LCD.

9.2 Wi-Fi Test To ensure a normal network, place the mobile phone within 15 meters away from the AP, and

there must be no obstacle between the mobile phone and AP.




60

Step 1 Configure the AP properly. Power on the phone and place it within the AP's transmission

range.

Step 2 Tap Settings > WIRELESS&SETTINGS > WLAN > turn WLAN on, and enable network

notifications.

Step 3 After the phone automatically finds the AP's SSID, touch the SSID and enter the password to

establish a connection.

Step 4 Change the distance between the phone and AP and check the change of the Wi-Fi signal

strength.

Step 5 In the normal network, launch a browser and access a website to test the network quality.

Step 6 If no problems are found, finish the Wi-Fi test. If any problems are found, troubleshoot the

phone or send it to an advanced service site for repair.

----End

9.3 Voice Call Test Step 1 Install a USIM card and battery on the mobile phone.

Step 2 Press the power key to power on the phone.

Step 3 Check whether the signal strength displayed on the LCD is normal.

Step 4 Make a call to a fixed-line phone, and check the voice quality during the call.

Step 5 If no problems are found during the test, finish the voice call test. If any problems are found,

troubleshoot the phone or send it to an advanced service site for repair.

----End

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Huawei g630 Repair Manual

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