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Internal Use Only

Service Manual

LG-P714

Date: March, 2013 /Issue 0.9

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- 2 - Copyright 2013 LG Electronics. Inc. All right reserved.Only or training and service purposes

LGE Internal Use Only

Table O Contents

1. INTRODUCTION ..................................................................... 3

1.1 Purpose ........................................................................................................3

1.2 Regulatory Inormation .........................................................................3

2. PERFORMANCE...................................................................... 5

2.1 Product Name ............................................................................................5

2.2 Supporting Standard ..............................................................................5

2.3 Main Parts : GSM Solution .....................................................................5

2.4 HW Features ...............................................................................................6

2.5 SW Features ............................................................................................. 10

2.6 HW SPEC. ................................................................................................. 22

3. CIC AND SERVICE CENTER .................................................. 29

3.1 CIC FAQ ...................................................................................................... 29

4. TROUBLE SHOOTING .......................................................... 49

4.1 RF Component ....................................................................................... 49

4.2 SIGNAL PATH ........................................................................................... 51

4.3 Checking TCXO Block........................................................................... 53

4.4 Checking GSM TX Module(GSM PAM + FEM) Block ................ 55

4.5 Checking WCDMA Block .................................................................... 574.6 Checking GSM Block ............................................................................ 68

4.7 GPS/WIFI/BT RF Component ............................................................ 75

4.8 GPS/WIFI/BT SIGNAL PATH ................................................................ 77

4.9 GPS/WIFI/BT Trouble shooting ........................................................ 79

4.10 Power on Trouble shooting ............................................................ 85

4.11 Charger Troubleshooting ................................................................ 88

4.12 USB Trouble shooting ....................................................................... 91

4.13 Audio Trouble ....................................................................................... 94

4.14 SIM Detect Trouble ...........................................................................112

4.15 Camera trouble ..................................................................................114

4.16 Main LCD trouble ..............................................................................120

4.17 Touch Key Trouble ............................................................................123

4.18 Touch sensor Trouble ......................................................................125

4.19 Side Key Trouble Shooting ............................................................127

4.20 DC Motor Trouble Shooting .........................................................129

4.21 Motion Sensor on/o Trouble Shooting .................................131

4.22 Compass Sensor on/o Trouble Shooting .............................133

4.23 Proximity Sensor on/o Trouble Shooting .............................135

5. DOWNLOAD .......................................................................137

6. BLOCK DIAGRAM ............................................................... 157

7. CIRCUIT DIAGRAM ............................................................ 164

8. BGA PIN MAP ....................................................................174

9. PCB LAYOUT .......................................................................180

10. CALIBRATION...................................................................186

11. HIDDEN MENU ................................................................. 206

12. DISASSEMBLE GUIDE ...................................................... 213

13. EXPLODED VIEW & REPLACEMENT PART LIST .............220

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1. INTRODUCTION

1.1 Purpose

This manual provides the information necessary to repair, calibration, description and download the features of

this model.

1.2 Regulatory Information

A. Security

Toll fraud, the unauthorized use of telecommunications system by an unauthorized part (for example, persons

other than your companys employees, agents, subcontractors, or person working on your companys behalf)can result in substantial additional charges for your telecommunications services.

System users are responsible for the security of own system. There are may be risks of toll fraud associated with

your telecommunications system. System users are responsible for programming and configuring the

equipment to prevent unauthorized use. The manufacturer does not warrant that this product is immune from

the above case but will prevent unauthorized use of common carrier telecommunication service of facilities

accessed through or connected to it. The manufacturer will not be responsible for any charges that result from

such unauthorized use.

B. Incidence of Harm

If a telephone company determines that the equipment provided to customer is faulty and possibly causing

harm or interruption in service to the telephone network, it should disconnect telephone service until repair can

be done. A telephone company may temporarily disconnect service as long as repair is not done.

C. Changes in Service

A local telephone company may make changes in its communications facilities or procedure. If these changes

could reasonably be expected to affect the use of the phones or compatibility with the net work, the telephone

company is required to give advanced written notice to the user, allowing the user to take appropriate steps to

maintain telephone service.

D. Maintenance Limitations

Maintenance limitations on the phones must be performed only by the manufacturer or its authorized agent.

The user may not make any changes and/or repairs expect as specifically noted in this manual. Therefore, note

that unauthorized alternations or repair may affect the regulatory status of the system and may void any

remaining warranty.

E. Notice of Radiated Emissions

This model complies with rules regarding radiation and radio frequency emission as defined by local regulatory

agencies. In accordance with these agencies, you may be required to provide information such as the following

to the end user.

1. INTRODUCTION

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1. INTRODUCTION

F. Pictures

The pictures in this manual are for illustrative purposes only; your actual hardware may look slightly different.

G. Interference and Attenuation

A phone may interfere with sensitive laboratory equipment, medical equipment, etc. Interference from

unsuppressed engines or electric motors may cause problems.

H. Electrostatic Sensitive Devices

ATTENTION

Boards, which contain Electrostatic Sensitive Device (ESD), are indicated by the sign.

Following information is ESD handling:

Service personnel should ground themselves by using a wrist strap when exchange system boards. When

repairs are made to a system board, they should spread the floor with anti-static mat which is also grounded.

Use a suitable, grounded soldering iron. Keep sensitive parts in these protective packages until these are used.

When returning system boards or parts like EEPROM to the factory, use the protective package as described.

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2. PERFORMANCE



2. PERFORMANCE

Item Feature Comment

Supporting Standard WCDMA(FDD1,2,5)/EGSM/GSM850/DCS1800/PCS1900

with seamless handover

Phase 2+(include AMR)

Frequency Range WCDMA(FDD1) TX : 1920 1980 MHz

WCDMA(FDD1) RX : 2110 2170 MHz

WCDMA(FDD2) TX : 1850 1910 MHz


WCDMA(FDD5) TX : 824 - 849 MHz


EGSM TX : 880 915 MHz

EGSM RX : 925 960 MHz

GSM850 TX : 824 849 MHz

GSM850 RX : 869 894 MHz

DCS1800 TX : 1710 1785 MHz

DCS1800 RX : 1805 1880 MHz

PCS1900 TX : 1850 1910 MHz

PCS1900 RX : 1930 1990 MHz

Application Standard WAP 2.0

2.3 Main Parts : GSM Solution

Item Part Name Comment

Digital Baseband MSM8225A : Qualcomm

Analog Baseband PM8029 : Qualcomm

RF Chip RTR6285A : Qualcomm

2.1 Product Name

LG-P714 : WCDMA850/1900/2100+EGSM/GSM850/DCS/PCS

(HSDPA 7.2Mbps / GPRS Class 12 / EDGE Class 12)

2.2 Supporting Standard

2.3 Main Parts : GSM Solution

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2. PERFORMANCE



Item Feature Comment

Form Factor BAR type

Battery

1) Capacity

Standard : Li-ion, 2460mAh

2) Packing Type : Soft Pack

SizeStandard :

121.5 x 66.6 x 9.7 mm

Weight 118g With Battery

RX sensitivity

WCDMA(FDD1) : -111 dBm



EGSM : -108 dBm

GSM850 : -108 dBm

DCS 1800 : -108 dBm

PCS 1900 : -108 dBm

TX output power

WCDMA/

GSM/GPRS

WCDMA :

24dBm/3.84MHz,+1/-

3dBm

EGSM : 33dBmGSM850 : 33 dBm

DCS1800 : 30 dBm

PCS 1900: 30 dBm

EDGE compatibility GPRS Class 12

SIM card

type

EDGE Class

12RX EDGE

Class3(WCDMA)

Class4 (EGSM)

Class4 (GSM850)

Class1 (PCS)

Class1 (DCS)

Plug-In SIM3V /1.8V

Dual SIM

E2 (GSM900)

E2 (PCS)

E2 (DCS)

DisplayWVGA Main LCD(4.3, 800 x 480)

Built-in Camera 8M CMOS Camera

Status Indicator Yes

Keypad

Touch Screen

Front Key : 4

Side Key : 3

Side Key : Power On

Volume up/down

ANT Main : Internal Fixed Type

System connector 5 Pin u-USB

2.4 HW Features

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2. PERFORMANCE



Ear Phone Jack 3.5 pi type

PC synchronization Yes

Memory4GB eMMC

4Gb LPDDR1

Speech coding FR, EFR, HR,AMR

Vibrator Built in Vibrator

Blue Tooth Bluetooth 3.0+EDR

MIDI(for BuzzerFunction)

SW Decoded 72Poly

Music Player MP3/WMA/AAC/MIDI/EAAC+/OGG

Video Player MPEG4, H.264

Camcorder MPEG4 or H.263

Voice Recording Yes

Speaker Phone mode

SupportYes

Travel Adapter Yes

CDROM No

Stereo Headset Yes

Data Cable Yes

T-Flash

(External Memory)Yes ( Up to 32GB )

BAR WCDMA GSM/DCS/PCS

5 Over -85 3dBm Over -90 3dBm

54 -86 3dBm -91 3dBm

43 -92 3dBm -97 3dBm

32 -98 3dBm -99 3dBm

21 -102 3dBm -103 3dBm

10 -108 3dBm -105 3dBm

Measure RSSI after 10 seconds if you change power.

1) RSSI Display

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2. PERFORMANCE



Stand by

Voice Call VT

Bluetooth Off Bluetooth Connected

WCDMA

Only

5.0 mA under

(DRX=128)

5.5 mA under

(DRX=128)

350 mA under

(Tx=10dBm) NA

GSM

Only

5.0 mA under

(Paging=5 period)

5.5 mA under

(Paging=5 period)

350 mA under

(Tx=Max)

Stand by Voice Call VT

WCDMA500 hours over

(DRX = 128)

500 min over

(TX = 10dBm,

Low Pwr mode)

NA

GSM500 hours over

(Paging Period = 9)

500 min over

(TX Level = Max)

2) Charging Time

MAX. 3Hr 30min

3) Travel Charger

Input : 90 ~ 264 V, 50/60 Hz

Output : 5.0V, 850 mA

4) Battery Type

Li-ion Battery Pack, 2460 mAh

Standard Voltage : 3.8 V, Battery Full Charge Voltage : 4.25V ~ 4.35V

5) Current Consumption

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2. PERFORMANCE



Battery Bar Specification

BAR 20 (Full) 98%

BAR 20 --> 19 98% 97%

BAR 19 --> 18 93% 92%

BAR 18 --> 17 88% 87%

BAR 17 --> 16 83% 82%

BAR 16 --> 15 78% 77%

BAR 15 --> 14 73% 72%

BAR 14 --> 13 68% 67%

BAR 13 --> 12 63% 62%

BAR 12 --> 11 58% 57%

BAR 11 --> 10 53% 52%

BAR 10 --> 9 48% 47%

BAR 9 --> 8 43% 42%

BAR 8 --> 7 38% 37%

BAR 7 --> 6 33% 32%

BAR 6 --> 5 28% 27%

BAR 5 --> 4 23% 22%

BAR 4 --> 3 16% 15%

BAR 3 --> 2 13% 12%

BAR 2 --> 1 8% 7%

BAR 1 --> 0 3% 2%

POWER OFF 0%

6) Battery Bar

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2. PERFORMANCE



Function Detail Item O / X Specification Etc.

OS OS OAndroid 4.1.2

JB

DataCircuit X

Video Telephony using

64kbps CSD

Packet O

Connectivity

Infrared (IrDA) X

Bluetooth O Ver. 3.0 + EDR

Wi-Fi O 802.11 b/g/n

USB O Ver. 2.0 HS

USB Mass storage O SD card only

RS232 X

DLNA1.5 O

Voice Function

Voice Recording O

Voice Command

X Digit Dial

X Name Dial

X Menu

X Phonebook Searching

Answering machine XDriving, Meeting, user

define(absent)

Memory User Memory

O Total4GB eMMC/ 4Gb DDR +

external MicroSD

O Total User Memory 1.7GB (TBD) (w/o MicroSD)

O MMS

OPictures (Still Image &

Moving Image)

O MP3 (Music Contents)

X Java Contents

O Wallpaper

O Ringtone

Oexternal memory

(microSD)

support SDA2.0

specification, up to 32GB

2.5 SW Features

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2. PERFORMANCE



Camera

(Still Capture)

Memory O MicroSD

Camera Module O 8M CMOS Camera

Auto Focus O Still Mode AF

Digital Zoom OCamera : X4, Camcorder :

X2

Capture Resolution O

8M(3264X2448),

W6M(3200X1920)

5M(2560x1920),

3M(2048x1536),

W3M(2240x1344),

1M(1280x960),

W1M(1280x768)

Continuous Shot O

Quality X

Preview Image O 640 X 480

TV-Out X

Flash O LED

Filter ONone/Mono/Sepia/Negativ

e

Timer O Off / 3 secs / 5 secs/10 secs

JPEG Encoding

O JPEG

O Thumbnail

O

3264X2448, 3200X1920,

2560x1920, 2048x1536,

2240x1344, 1280x960,

1280x768

JPEG Decoding

O JPEG

O Min, Max Supported by Gallery

Panorama Shot O

Album&Slide show O Slide show Supported by Gallery

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2. PERFORMANCE



Camera

(Movie

Capture)

Movie Resolution O720X480,

640x480,320x240,176x144

Filter O Same as the Still Capture

Quality X

MPEG Visual Bit Rate O 2000,2000,320,192 Kbps

Audio Encode O AAC, , AMR-NB

Audio Decode O AMR

Movie Recode O Recode, Stop

Movie PlaybackO

Play, Stop, Pause

Stream Format (Mux) O 3gp

Stream Format

(Demux)O 3gp

Recoding Time O Real Time Recoding

TV-Out X

Audio Voice Codec O AMR

Multimedia

AAC /AAC+/ EAAC+ O

MP3, WAV O

WMA O

Midi OMidi Type0, Midi Type1, SP-

MIDI

Music ringtone OMP3, AAC, AAC+, AAC-LC, XMF

1.01, AMR

AMR-NB O

Music player skin O Music Player

FM Radio O With RDS Japan band is not supported

Speakerphone O

Multimedia

MPEG4/H.263 O

H.264 O

WMV O

Normal View XMoving Image Capture & Movie

Contentscontents size

Wide View O Full Screen mode

Custom DTV Zoom X

Other

Features

File Viewer O doc, xls, ppt, gif, jpg

Macromedia Flash

LiteX Not Available

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2. PERFORMANCE



e-Book/e-Comic

BookX *.doc, *.jpg, *.gif

E-book reader program is

not included in ROM. But

user can download in

internet. WM product

recommend using Microsoft

Reader for PPC.

Flight Mode O

Internet Browser

WAP

(Windows Mobile 6.0

IE Mobile )

X version 2.0

X WML1.3

O XHTML1.1

O HTML4.01 Partially support - HTML 5

Java

MIDP X

J2ME support X

Game & Contents X

CLDC X

Flash Flash Game X

Streaming Service

H.263+AAC/AMR-NB O

MPEG4+AAC/AMR-

NBO

WMV9 XSupport WMV main and base

profile except advanced profile

DRM OMA DRM

O Forward Lock

X Separate Delivery

X Combined Delivery - Count-only

OTA OTA O OTA 1.0

Display

RSSI O 4 level

Battery Level O 5 level Yes

RTC O

Multi Language O depending on build language.

PLMN/Service

Indicator

O

Dimming Clock OBattery power

15s, 30s, 1min, 2min, 10min,

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2. PERFORMANCE



30min

External power

15s, 30s, 1min, 2min, 10min,

30min

Dual Clock O widget

Last Dialed Number O

Normal Features

Last Received

NumberO

Last Missed Number O

Scratch Pad Memory X

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2. PERFORMANCE



Call Management Call Waiting O

Management Call Swap O

Call Retrieve O

Auto Answer X

Automatic Redial X

Calling Line Identification O

Full Call divert X

Speed Dialing O

Last Number Redial X

Multiparty Call (Conference

Call)O

Explicit Call Transfer O

Network

Automatic Network

SelectionO

Manual Network Selection O

Network Service Status O

DTMFDTMF Signaling O

DTMF Enable & Disable X

Audio

Key Tone Volume O 8 Level (Include Mute)

Ring Tone Volume O 8 Level (Include Mute)

Ring Tone Pattern O

Ring Type Silent O Vibrator & Ring (Indicator)

Earpiece Volume O 8 Level (Include Mute)

Mute O

Cell Broadcast

Read Cell Broadcast O

Cell Broadcast Categories X

Cell Broadcast Message

LanguageO

Supports filtering with

language IDs (German,Italian,French,Spanish,

Dutch,Swedish,Danish,Portuguese,Finnish,Norwegg

ian

,Greek,Turkish,Hungarian,Polish,Czech)

Management

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2. PERFORMANCE



Phone Book

Entry O

Phone,Email,Grops,Postal

address,Organization,IM,Notes,

Nickname,Website,Event

FieldO

Phone(Mobile,Home,Work,Work

Fax,Home Fax,Pager, Other, Custom)

Email(Home,Work,Other,Custom)

Groups(Business,Colleagues,Family,

Friends,School,Custom)

Postal

address(Home,Work,Other,Custom)

Organization(Work,Other,Custom)

IM(AIM,Windows

Live,Yahoo,Skype,QQ,Google

Talk,ICQ,Jabber,Custom)

Event(Birthday,Anniversary,Event)

Numeric Store and Recall O

Alphabetic Store O

Alphabetic Recall X

Scroll by alphabetic or

numeric orderO

Last Number Dialed O

Last Number Missed O

Last Number Received O

Copy & Move X Move not support

Fixed Dial Number O

Barred Dial Number X

Service Dial Number X

Email Entry O

Picture ID O Relating Photo caller ID

My Name card O Bluetooth transmission (OPP)

Call CostLast Call Timer X

Last Call Charge Units X

Total Call Timer X

Total Charge Units X

Visible, Audible Call Time/Cost

IndicationX

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2. PERFORMANCE



Supp. Services

Call Forwarding

O All Incoming Calls,

O No Reply

O On Busy,

O Not reachable

Call Barring

O All Outgoing Calls,

O International Calls,

O

Calls except to Home Country

incoming Calls,

O All incoming Calls when roaming

Conference Call O up to 5 calls

SIM

Plug In Type O

SIM Lock O

SIM Toolkit O

Prepaid SIM Operation O

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2. PERFORMANCE



Short

Messaging

Read Message O EMS Not Support

Write and Edit Message O

Send and Receive Message O

Reply to Message O

Forward Message O

Extract Number from

MessageO

Message Status O

Message Unread Indicator O

Settable Message Center

Number, O

Reply Path and Validity

Visible and Audible

Message Receive AlertingO

Voice Mail O

Settable Voice Mail Center

NumberO

Message Protocol O

Message Overflow

IndicatorO

Message Center Number O

Help Menu X

Multimedia

Messaging

Picture Attachable O Max 300kbyte

Moving Picture Attachable O Video MMS Max 300kbyte

Voice Attachable O AMR

Help Menu X

Others O

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2. PERFORMANCE



Instant Messaging

Service

IM O Gtalk

PC Compatable O

Menu Option O

E-Mail Protocol

O IMAP4

O SMTP

O POP3

X Help Menu

Voice Instant

Messaging Service

PTTX Full Duplex

X Half Duplex

Menu Option

X Grouping

X Status List

X Help

X Others

Sound Contents

Wallpaper X

Screen Saver X

Ringtones O

Karaoke X

Stutter Sound O

Flip tone X

Button tone Ocan be enable or disable button

press sound.

Others X

Voice Instant

Messaging Service

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2. PERFORMANCE



Calendar New Event O

Edit Event O

Agenda O

Reminder O

Google sync O

Miscellaneous

Function

Development & Test

Facility

X

Field Test Facility X

Display Software

Version

O

IMEI O *#06#

Text Input Language O

Predictive word input O T9 predictive supported.

Scheduler Schedule NA

To Do List NA

Memo NA

D-day counter NA

Send via Bluetooth NA

World Time Setting Local Time O

Display Two Number

of Cities Time

X

Daylight saving O

Unit converter X

Stop watch X Included in Alarm/Clock

Calculator Calculation O

PC Sync Phone Book Sync O

Message Sync x PC suite support message viewing

and sending.(not sync)

Multimedia Contents

Sync

x PC suite support file transfer

between phone and PC.(not sync)

Scheduler Sync O

Sync ML DS X

DM O

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2. PERFORMANCE



Game X TBD

External

Interface

Electrical Man Machine

InterfaceX

Handset

Development and Test Facility X

Restore Factory Setting O

Security

Read Software Version O

Battery Charging Mode O USB/ TA Charging USB/ TA Charging

Emergency Call O

Real Time Clock

Handset Lock O

Security Code O

SIM Lock O

Key guard X

12/24 hour O

Calendar O

Time Zone O

Alarm Manager O

Dimming Clock O

Battery power

15s, 30s, 1min, 2min, 10min,

30min

External power

15s, 30s, 1min, 2min, 10min,

30min

Power-off Alarm X

On Alarm Event O Display

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2. PERFORMANCE



Item Specification

Phase ErrorRms : 5

Peak : 20

Frequency ErrorGSM : 0.1 ppm

DCS/PCS : 0.1 ppm

EMC(Radiated Spurious Emission

Disturbance)GSM/DCS : < -28dBm

Transmitter Output power and Burst

Timing

GSM : 5dBm 33dBm 3dB

DCS/PCS : 0dBm 30dBm 3dB

Burst Timing

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2. PERFORMANCE



2) WCDMA transmitter specication

Item Specification

Transmit Frequency

Band1 : 1920 MHz ~ 1980 MHz

Band2 : 1850 MHz ~ 1880 MHz

Band5 : 824MHz~849MHz

Maximum Output Power +24 dBm / 3.84 MHz, +1 / -3 dB

Frequency Error within 0.1 PPM

Open Loop Power Control Normal Conditions : within 9 dB,Extreme Conditions : within 12 dB

Minimum Transmit Power < -50 dBm /3.84 MHz

Occupied Bandwidth < 5 MHz at 3.84 Mcps (99% of power)

Adjacent Channel Leakage

Power Ratio (ACLR)

> 33 dB @ 5 MHz,

> 43 dB @ 10 MHz

Spurious Emissions

|f-fc| > 12.5 MHz

< -36 dBm / 1 kHz RW @ 9 kHz f < 150 kHz

< -36 dBm / 10 kHz RW @ 150 KHz f < 30 MHz

< -36 dBm / 100 kHz RW @ 30 MHz f < 1 GHz< -30 dBm / 1 MHz RW @ 1 GHz f < 12.75 GHz

< -60 dBm / 3.84 MHz RW @ 869 MHz f 894 MHz



< -67 dBm / 100 kHz RW @ 925 MHz f 935 MHz

< -79 dBm / 100 kHz RW @ 935 MHz < f 960 GHz

< -71 dBm / 100 kHz RW @ 1805 MHz f 1880 MHz

< -41 dBm / 300 kHz RW @ 1884.5 MHz < f < 1919.6 MHz

Transmit Intermodulation< -31 dBc @ 5 MHz & < -41 dBc @ 10 MHz

when Interference CW Signal Level = -40 dBc

Error Vector Magnitude < 17.5 %, when Pout -20 dBm

Peak Code Domain Error < -15 dB at Pout -20 dBm

Band1 : 1920MHz 1980MHz



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2. PERFORMANCE



4) HSDPA transmitter specication

Item Specification

Transmit Frequency Band1 : 1920 MHz ~ 1980 MHz

Band2 : 1850 MHz ~ 1880 MHz

Band5 : 824MHz~849 MHz

Maximum Output Power Sub-Test

1=1/15, 2=12/15 21~25dBm / 3.84 MHz

3=13/15 4=15/8 20~25dBm / 3.84 MHz

5=15/7 6=15/0 19~25dBm / 3.84 MHz

HS-DPCCH

Sub-test

in table

C.10.1.4

Power

step

Power step slot

boundary

Power

step size,

P [dB]

Transmitter power

step tolerance [dB]

5

1Start of

Ack/Nack6 +/- 2.3

2 Start of CQI 1 +/- 0.6

3 Middle of CQI 0 +/- 0.64 End of CQI 5 +/- 2.3

Spectrum Emission Mask

Sub-Test : 1=1/15, 2=12/15, 3=13/15, 4=15/8, 5=15/7, 6=15/0

Frequency offset

from carrierfMinimum requirement

Measurement

Bandwidth

2.5 ~ 3.5 MHz -35-15(f-2.5)dBc 30 kHz

3.5 ~ 7.5 MHz -35-1(

f-3.5)dBc 1 MHz

7.5 ~ 8.5 MHz -35-10(f-7.5)dBc 1 MHz

8.5 ~ 12.5 MHz -49dBc 1 MHz

Adjacent Channel Leakage

Power Ratio (ACLR)

Sub-Test : 1=1/15, 2=12/15, 3=13/15, 4=15/8, 5=15/7, 6=15/0

> 33 dB @ 5 MHz

> 43 dB @ 10 MHz

Error Vector Magnitude < 17.5 %, when Pout -20 dBm




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2. PERFORMANCE



5) HSDPA receiver specication

Item Specification

Receive Frequency

Band1 : 2110 ~ 2170 MHz

Band2 : 1930 MHz ~ 1990 MHz

Band5 : 869~894MHz

Maximum Input Level

(BLER or R), 16QAM Only

Sub-Test : 1=1/15, 2=12/15, 3=13/15, 4=15/8, 5=15/7, 6=15/0

BLER < 10% or R >= 700kbps

6) WLAN 802.11b transceiver specification

Item Specification

Transmit Frequency 2400 MHz ~ 2483.5 MHz ( CH1~CH13 )

Tx Power Level 20dBm under

Frequency Tolerance within 25 PPM

Chip clock Frequency

Tolerance

within 25 PPM

Spectrum Mask -30 @ fc-22MHz< f

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2. PERFORMANCE



Item Specification


Tx Power Level 20dBm



Tolerancewithin 25 PPM

Spectrum Mask

-22 @ 11MHz offset (9Mhz ~ 11MHz)

-30 @ 20MHz offset (11MHz ~ 20Mhz)


Transmitter constellation error

(rms EVM) -5dB

Spurious Emissions

< -36 dBm @ 30MHz ~ 1GHz

< -30 dBm above @ 1GHz ~ 12.75GHz

< -47 dBm @ 1.8GHz ~ 1.9GHz

< -47 dBm @ 5.15GHz ~ 5.3GHz

Rx Min input SensitivityPER 10%

-71dBm

Rx Max input Sensitivity -20dBm(6,9,12,18,24,36,48,54Mbps) @ PER 10%

Rx Adjacent Channel

Rejection

PER 10%,

-1dB

7) WLAN 802.11g transceiver specication

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2. PERFORMANCE



8) WLAN 802.11n transceiver specication

Item Specification

ReceiveFrequency 1574.42 MHz ~ 1576.42 MHz

Minimum Sensitivity 1 satellite -142dBm, 7 satellites -147dBm at coarse time aiding

9) GPS receiver specication

Item Specification


Tx Power Level 20dBm



Tolerance

within 25 PPM

Spectrum Mask -22 @ 11MHz offset (9Mhz ~ 11MHz)



Transmitter constellation error

(rms EVM)

-5dB

Spurious Emissions < -36 dBm @ 30MHz ~ 1GHz

< -30 dBm above @ 1GHz ~ 12.75GHz

< -47 dBm @ 1.8GHz ~ 1.9GHz

< -47 dBm @ 5.15GHz ~ 5.3GHz

Rx Min input Sensitivity PER 10%

-61dBm

Rx Max input Sensitivity -20dBm(6,9,12,18,24,36,48,54Mbps) @ PER 10%

Rx Adjacent Channel

Rejection

PER 10%,

-1dB

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3. CIC AND SERVICE CENTER




3.1 CIC FAQ

No FAQ Q&A

1 Q I cant remember the PhoneLock password.

A

Do the ollowing when you orget your Pattern, Pin and Password.

1. With a Google account

1) Forgot Pattern > Enter your Google acctount> Reset

2. With no Google account

- Power o > Keep pressing Power + Volume Down+ Home Key

(Factory Hardware Reset)

3. When you have a Backup Pin, enter the BackUp pin.

Reer to the User Manual or details.

Request for

development

1. How to disable Pattern Lock, Password and PIN.

2. Request to check out i it is specied in the user manual.

3. Description on HW Factory Reset Key combination and how to do it.

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No FAQ Q&A

2 Q How do I put in and take out les rom the SD card?

A

1) Connect the phone with PC via USB.

2) Select MTP in the USB Connection Mode pop-up window.

3) Copy/Save/Delete the fle via the Windows Explorer on PC.

Request for

development

1. PC SD CARD

2. PHONE SD CARD

3 Q I use it abroad, but 3G connection doesnt work.

A

The phone switches to the roaming mode abroad.

For 3G connection in the roaming mode, change the option as ollows.

Option Key -> System settings -> More -> Mobile networks -> Check Data

roaming option

Request for

development

ex) 1. EuropeEurope

2. EuropeContinents(North America, Asia etc)

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No FAQ Q&A

4 Q The GPS location isnt right, what should I do?

A

1. Prior to running an application, check the Location Service Setting.

Menu -> Setting -> Location services

: Googles location service Enable => Searches a nearby base station and shows

approximate distance rom the user to the station (location error: 500m ~ 2000m).

: GPS Satellites Enable => Searches GPS around the user and the accurate location

(location error: less than 50m).

2. GPS signals are not visible indoors even when GPS Satellites are Enabled. As a

result, the location ound may be an approximate, not accurate, distance.

( Location Setting -> Use 3G/4G Wi-Fi Location / only when Location-based Google

search is Enabled / To fnd a location via GPS, stay near windows or in the open air.)

3. Maps application / Navigation application require 3G/4G Data to be Enabled in

order to get map data so that the user can see accurate location.)

5 Q The downloaded application isnt compatible?

ASome apps are incompatible with certain Android OS versions.

- Inquire developers about incompatibility.

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No FAQ Q&A

6 Q How do I make an e-mail account?

A

1) Run the Email app

2) Select Exchange - MS Exchange or IMAP/POP3 - Others

3) Enter email address and PW ( Enter UserID i it does not match the address. )

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No FAQ Q&A

7 Q E-mail registration doesnt work.

A

1) Check out i server inormation is correct.

- Yahoo / Hotmail server addresses may vary rom country to country. I server

inormation has changed and become dierent rom Email management DB,

account registration may not be successul.

Enter email address / pw and press Manual button to enter the server address

manually. ( Reer to the web site o the email service or server address. )

2) Some accounts e.g. Hotmail apply locks to prevent account thets.

- In that case, access the email account on the web, and it is unlocked along with a

notice.

3) See i the email account has POP/IMAP Enabled.

- Access the email account on the web, go to the setting menu and Enable/Disable

IMAP/POP eatures.

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No FAQ Q&A

8 QUnused application shows up as a using program even though it is all killed. What

should I do?

A

Some apps remain active even when they are killed depending on the phone

status (network connection, internal process etc).

Do the ollowing in this case to Force Stop such apps.

Menu > System settings > App >Select the app > Force Stop

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No FAQ Q&A

9 Q Wi connection doesnt work well.

A

1) See i Wi-Fi is turned on (i it is OFF, turn in On.)

2) See i any Wi-Fi network is available.

3) Check out the signal strength o the available Wi-Fi (Wi-Fi connection ails in case

its signal is weak or any security locks applied. )

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No FAQ Q&A

10 Q How do you install the PC Sync Program?

A

1. Go to the home page and download it.

1) Select the country at www.lgworld.com.

2) Click [Manual & Sotware Download].

3) Search your smartphone model.4) Click [PC Sync] among download items and [WINDOW PCSync Download]

button and download the PC SW.

2. Download it using AutoRun

1) Connect the phone with PC, and select [PC Sotware] in the USB ConnectionMode pop-up window.

2) Shortly, click [Download] button in the Autorun pop-up on PC.

Guide or installation o LG Companion

In order to install LG companion, you needto download.

Please press the button below.

Downloadconrm

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No FAQ Q&A

11 Q How do you install the Phone driver?

A

1. Download it on the home page.

1) Select the country at www.lgworld.com.

2) Click [Manual & Sotware Download].

2. Download it using AutoRun1) Connect the phone with PC, and select [PC Sotware] in the USB Connection

Mode (auto-run) pop-up window.

2) On Windows 7, select LGAutoRun.exe. Windows XP runs auto installation.

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No FAQ Q&A

12 Q How to connect internet/data network

A

Tick the ollowing option to connect to data network.

Option Key -> System settings -> Dual SIM -> Check Data Enabled option.

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No FAQ Q&A

13 QWhat should I do to connect PC Sync program

with the phone?

A

1. USB connection

1) Run PC Suite

2) Connect PC with phone via USB, and in the [Connection Mode] pop-up, select

LG sotware.

3) Automatic connection ollows.

2. Wi-Fi connection

1) Connect PC and Phone to an AP(to a Wi-Fi or hot-spot)

2) Menu on your phone>Setting>Connection> Tick PC Suite

3) Press the button below under PC Suite, or Device->Device connection->USB

cable connection->Wi-Fi connection

4) Click Next

5) Search and select the model and press Connect.

6) Accept connection on the phone

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No FAQ Q&A

14 Q Can language be changed?

A

Do the language setting as ollows.

Menu > system settings > Language & input > Language

15 Q How do you Reset and Factory Reset?

A

Do the Factory Reset as ollows.

Menu > system settings > Backup & reset > Factory data reset > Erase everything

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No FAQ Q&A

16 Q I want to change the bell sound.

A

Change the Bell Sound as ollows.

Menu > System settings > Sound > Phone ringtone >Select one rom the list > OK

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No FAQ Q&A

17 Q Is it compatible with other devices?

A

It is compatible with Bluetooth devices.

Connection is available with bluetooth devices, e.g. headsets, PCs, phones.

Then you can play music and send/receive fles.

Ex.) Connect Bluetooth headsetsMenu>Setting>Bluetooth on>Search devices>Select a device>Pairing>Connection

Request for

developmentBluetooth

18 Q How do you use HDMI?

A N/A

19 Q HDMI error occurs.

A N/A

LG-P714

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No FAQ Q&A

20 Q How do you use Smart Share?

A

SmartShare enables DLNA-authorized devices on a network to share photos,

videos and music.

1. Press Applications>Select SmartShare.

2. From>Select a library containing the content.

(My Phone, another phone, PC etc.)

3. Browse the library and select the content.

4. When Player Setting List appears, select a Player.

21 Q Smart Share error occurs.

A

1. P714 does not appear on other devices.

- Setting> Make sure Discoverable is ticked.- Make sure P714 is allowed on other devices settings.

2. Devices are connected to the same AP. But no devices appear under From.

- Make sure connected devices support DLNA and DLNA server eature(DMS) is

on.

- Device search may not work properly when network condition is not good.

3. Files are not played.

- Files may not be supported by the device.

4. Uploading does not work.- The DMS to be uploaded may not support uploading.

MUSIC VIDEO PICTURE

PLAY LIST

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No FAQ Q&A

22 Q Battery consumption is too ast.

A

How to extend battery lie

1) Turn o Wi-Fi, Bluetooth and GPS eatures when not in use.

2) Lower the screen brightness. Shorten the screen time-out setting.

3) Turn o Gmail, Calender,Contacts and other auto sync eatures.

23 QHow is the distribution schedule o OS or SW

new version known?

A Reer to the home page.

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No FAQ Q&A

24 Q How do you update the SW?

A

There are three ways.

1. USB installation

1) Go to www.lg.com

2) Mobile > Select Driver & Downloads3) Select your phone

4) Install USB driver and LG MOBILE SUPPORT TOOL on your PC

5) Connect the phone to USB and install updates ollowing the program.

2. OTA-based wireless installation

1) Menu >Setting >Phone ino >SW updates

3. Visit a service center.

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No FAQ Q&A

25 QUntil when is it guaranteed ater purchase?

What is the warranty limit?

A 1 year

26 Q What kinds o phone accessories are there?

A

1. Travel adaptor

2. Battery

3. Stereo headset

4. Data cable

5. User Guide

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No FAQ Q&A

Please ask and answer 3 expected questions regarding the new product and new eatures.

27 Q What should I do to enter the Sae Mode?

A

1. On Android booting, enter using Vol-Down or Menu button.

(Menu is a Touch key. Vol-Donw is recommended.)2. Sae Mode is displayed in gray at the let bottom.

3. In Sae Mode, no Download App is present. Only preload apps are displayed.

Request for

development

Model-specifc Sae Mode entry procedures need describing together with screen

captures.

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No FAQ Q&A

28 Q What is the Memory Size provided or and seen to the end user?

A

1. Available Memory: 2.1GB

2. External memory is not an inbox.

Request for

development

1) The phones deault avaiable memory capacity is marked in the image attached.

2) Actual size available to customers need be marked.

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4. TROUBLE SHOOTING



4. TROUBLE SHOOTING

4.1 RF Component

U1001U1002

U1005

FL1003

FL1002

FL1005

FL1011

FL1012

FL1006

FL1001

FL1004

FL1007

FL1010

U1006

U1004FL1008

U1003

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4. TROUBLE SHOOTING



RF component (WCDMA / GSM)

Reerence Description Reerence Description

U1001 U1001(Transceiver, RTR6285A) FL1004 WCDMA Band8 Tx SAW Filter

U1002 FEM + GSM PAM Module FL1005 WCDMA Band1 Duplexer

U1003 WCDMA Band8 PAM FL1006 WCDMA Band1 Rx SAW Filter

U1004 WCDMA Band1PAM FL1007 WCDMA Band1 Tx SAW Filter

U1005 WCDMA Band2 PAM FL1008 WCDMA Band2 Duplexer

U1006 External LNA FL1010 WCDMA Band2 Tx SAW Filter

FL1001 GSM Low Band Rx SAW Filter FL1011 WCDMA Band8 Rx SAW Filter

FL1002 GSM High Band Rx SAW Filter FL1012 WCDMA Band2 Rx SAW Filter

FL1003 WCDMA Band8 Duplexer

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4. TROUBLE SHOOTING



4.2 SIGNAL PATH

WCDMA / GSM Tx PATH

WCDMA Band1 Tx Path

WCDMA Band2 Tx Path

WCDMA Band8 Tx Path

GSM Low Band Tx Path

GSM High Band Tx Path

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4. TROUBLE SHOOTING



WCDMA / GSM Rx PATH

WCDMA Band1 Rx Path

WCDMA Band2 Rx Path

WCDMA Band8 Rx Path

GSM Low Band Rx Path

GSM High Band Rx Path

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4. TROUBLE SHOOTING



4.3 Checking TCXO Block

The output requency (19.2MHz) o TCXO (X2001) is used as the reerence one o RTR6285 and PM8029 internal VCO.

Schematic o the Crystal Part (19.2MHz)

TP1

TP2

TP3

R2007

100

C2028 1n19.2MHz

1XXA19200FBB

X2001

3

2

4

1VCONT

VCC

GND

OUT

VREG_TCXO_2.85V

C2026 330p

1n

C2023

0.1u

C2024

27pC2027

C2025

10n

TCXO_RTR_19.2MHZ

TCXO_NFC_19.2MHz

TCXO_PM_19.2MHZTRK_LO_ADJ

R2007 : Change 1Kohm --> 100ohm(refer to QCT reference schematic)

change 0819

Clesed to TCXO

CHANGE 11.03.02

GPS DFF was removed.CHANGE 1008

TP1

TP2

TP3

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4. TROUBLE SHOOTING



Check TP1

VCC o TCXO

2.4V Voltage 0.4V

VCC 2.8V

Check MSM8225

Check PM8029

No

No

Yes

Yes

Check TP3

Check TP2

19.2 MHz SignalCheck soldering and

components

No

Yes

TCXO is OK

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4. TROUBLE SHOOTING



4.4 Checking GSM TX Module(GSM PAM + FEM) Block

Schematic o the TX Module

TP1(VBATT)

68

R1003

100

R1004 R1005

100

C1034

DNI

C1035 D

NI

C1036

DNI

DNI

C1038

R1002

2.2K

68

R1007

R1009

100 100

R1008

39p

C1015

47p

C1033

U1002

GND12

VBATT5

GND10

27

GND219

GND9

26

GND320

GND8

25

GND421

ANT18

PGND331PGND2

30PGND1

29

GND522

GND6

23

GND7

24

PGND634PGND5

33PGND4

32

PGND7

35

PGND8

36

PGND9

37

PGND1038

PGND1139

PGND1240

PGND1341

PGND1442

PGND1543

PGND1644

HB_IN1

GND11

28

LB_IN3

VAPC4

BS26

BS17

TXEN_8

MODE

9

WCDMA317

TEMP

10

RX4

11

RX3

12

RX2

13

RX1

14

WCDMA115

WCDMA216

C1032

10u

ANT_SEL0

ANT_SEL3ANT_SEL2

ANT_SEL1

+VPWR

GSM_HB_TX

GSM_LB_TX

GSM_PA_RAMP

0603

0603

0603

DCS(1710-1785 MHz)

PCS(1850-1910 MHz) 10dB Atten

10dB Atten.

2mm

FEMGSM900(880-915MHz)GSM850(824-849MHz)

TP1(VBATT)

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4. TROUBLE SHOOTING



Check ANT_SEL 0, 1, 2, 3High Level

1.2V < Voltage < 3V Check the TP1(VBATT)No

Yes

Check the Logic each mode1.2V

ANTENNA SWITCH MODULE LOGIC (SKY77544)

ANT_SEL0 ANT_SEL1 ANT_SEL2 ANT_SEL3

GSM850/GSM900 TX LOW HIGH LOW LOW

DCS1800/PCS1900 TX HIGH HIGH LOW LOW

PCS1900 RX LOW LOW LOW (X) HIGH

DCS1800 RX LOW HIGH LOW (X) HIGH

GSM 900 RX HIGH HIGH LOW (X) HIGH

GSM 850 RX HIGH LOW LOW (X) HIGH

W1700 HIGH LOW LOW LOW

W900(W850) LOW LOW HIGH LOW

W2100 HIGH LOW HIGH LOW

Checking Switch Block Power Source

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4. TROUBLE SHOOTING



2. Check TX Module

Block Reer to 4.4

1. Check TCXO 19.2MHz

3. Check RF Tx Level

4. Check PAM Block

Reer to 4.5.4

START

5. Check RF Level

6. Re-download & Cal

4.5 Checking WCDMA Block

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4. TROUBLE SHOOTING



4.5.1Checking TCXO Block

Reer to 4.3

4.5.2. Checking FEM Block

Reer to 4.4

4.5.3. Checking RF TX Level

Test Point (TX Level)

TP3

TP2

TP4

TP1

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4. TROUBLE SHOOTING



2.2nC1001L1001

2.7n

L1004

0.5p

68

R1003

100

R1004 R1005

100

L1005

100n

SW1002

43

2

1ANT COMMON

G3 G4

R1002

2.2K

R1007

SW1001

G1

ANTG2

39p

C1015

U1002

GND12

VBATT5

GND10

27

GND219

GND9

26

GND3 20

GND8

25

GND421

ANT18

PGND1

GND522

GND6

23

GND7

24

PGND1341

PGND1442

PGND1543

PGND1644

HB_IN1

GND11

28

LB_IN3

VAPC4

BS2

BS1TXEN_

WCDMA3

WCDMA2

L1002

DNIL1003

DNI

GSM_HB_TX

GSM_PA_RAMP

0603

DCS(1710-1785 MHz)


FEM

TP1

5.6n

L1025

FL1005

75

84

92

3

16ANT RX

TX

G ND 1 G ND 6

G ND 2 G ND 5

G ND 3 G ND 4

L1027

100p

100p

C1065

1.8n

C1096

C1080

DNI

C1078

100p

C1083

3.9n

100p

L1046

100p

C1095

C1067

DNI

C1077

1p

C1079

2.2n

L1035

1.8n

100p

C1063

C1130

1.8pC1128

0.5p

6.8n

L1045

C1082

0.5p

C1088

8.2

p

C1089

6.8

p

12n

L1029

L1039

1n

FL1003

75

84

92

3

16ANT RX

TX

G ND 1 G ND 6

G ND 2 G ND 5

G ND 3 G ND 4

L1044

10n

C1068

DNI

L1026

5.6

n

L1038

2.7

n

L1034

0.5p

L1032

1n

C1102

DNI

1n

C1122

100p

L1028

R1019

DNI

R1020

DNI

DNI

L1030

L1052

DNI DNI

L1049

100p

L1033

1n

C1126

L1041

100p

L1043

DNI

L1023

100p

DNI

C1074

100p

L1042

C1092

DNI

C1123

2.2u 1n

C1124

C1125

2.2u

C1066

2.2u

+VPWR

897.5 MHz

FL1004

5 3 2

4 1INOUT

G1G2G3

1950MHz

FL1007

5 3 2

4 1INOUT

G1G2G3

+VPWR

+VPWR

49.9

R1011

R1016

100

U1003

6

7 4

8 3

5

9 2

10 1

11PGND

VCC1VCC2

RFINRFOUT

VEN

NCISO

VMODEGND

CPL

FL1010

5 3 2

4 1INOUT

G1G2G3

1880,1960MHz

FL1008

75

84

92

3

16ANT RX

TX

G ND 1 G ND 6

G ND 2 G ND 5

G ND 3 G ND 4

U1004

6

7 4

8 3

5

9 2

10 1

11PGND

VCC1VCC2

RFINRFOUT

VEN

NCISO

VMODEGND

CPL

DNI

C1098

U1005

6

7 4

8 3

5

9 2

10 1

11PGND

VCC1VCC2

RFINRFOUT

VEN

NCISO

VMODEGND

CPL

100p

C1103

100p

C1069

100p

C1086

100p

C1087

R1015

100

R1014

68

L1024

DNI

PA_ON0

PA_ON1

PA_R0

PA_R0

PA_R0

WCDMA_1900_RTX

WCDMA_2100_RTX

WCDMA_1900_TX_OUT

WCDMA_900_RTX

WCDMA_2100_TX_OUT

WCDMA_900_TX_OUT

PDET_IN

PA_ON2

897.5MHz, 942.5MHz

1950MHz, 2140MHz

W1900W1900

W2100

W2100 TX(1920 -1980 MHz)

W2100

W900W900 TX(880 - 915 MHz)W850 TX(824 - 849 MHz)

W900

9.5dB

W1900 TX(1850 -1910 MHz)

TP2

TP3TP4

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4. TROUBLE SHOOTING



For testing, Max power output is needed.

Chenck ANT_SEL 0,1,2

(High,Low,Low)

Check TP1

Over 21 dBm?

Check TP2

Over 21 dBm?

Check TP3Over 21 dBm?

RF TX Level is OK

Yes

No

Check PAM Block

Reer to 4.5.4

Check Tx Module

Yes

No

Check TP4

Over 7 dBm?

Check Duplexer

Check RTR6285A

Yes

Yes

No

No

RTR6285 Maximum output Power = 7 dBm

RTR6285 minimum output Power = -80 dBm

PAM(ACPM-5281) = Maximum input Power = 10 dBm

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4. TROUBLE SHOOTING



4.5.4 Checking PAM Block

PAM control signal

PA_ON0 (C1069), PA_ON1(C1087), PA_ON2(C1103) : PAM Enable

PA_R0: PAM Gain Control

PA_ON must be HIGH (over 2.6V)

PAM IN/OUT Signal

When PAM is under the operation o high power mode (PA_R0(C1068) : Low),

PAM OUT power must be over 21 dBm

PAM IN power must be under 10 dBm

TP3 TP2

TP1

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4. TROUBLE SHOOTING



L1027

100p

100p

C1065

1.8n

C1096

C1080

DNI

C1078

100p

C1083

3.9n

100p

L1046

100p

C1095

C1067

DNI

C1077

1p

C1079

2.2n

C1130

1.8pC1128

0.5p

6.8n

L1045

C1082

0.5p

.

C1089

6.8p

L1039

1n

C1068

DNI

L1026

5.6n

L1038

2.7n

C1102

DNI

1n

C1122

100p

L1028

R1019

DNI

R1020

DNI

DNI

L1030

L1052

DNIDNI

L1049

1n

C1126

C1123

2.2u 1n

C1124

C1125

2.2u

C1066

2.2u

+VPWR

897.5 MHz

FL1004

5 3 2

4 1INOUT

G1G2G3

1950MHz

FL1007

5 3 2

4 1INOUT

G1G2G3

+VPWR

+VPWR

49.9

R1011

R1016

100

U1003

6

7 4

8 3

5

9 2

10 1

11PGND

VCC1VCC2

RFINRFOUT

VEN

NCISO

VMODEGND

CPL

FL1010

5 3 2

4 1INOUT G1G2G3

U1004

6

7 4

8 3

5

9 2

10 1

11PGND

VCC1VCC2

RFINRFOUT

VEN

NCISO

VMODEGND

CPL

DNI

C1098

U1005

6

7 4

8 3

5

9 2

10 1

11PGND

VCC1VCC2

RFINRFOUT

VEN

NCISO

VMODEGND

CPL

100p

C1103

100p

C1069

100p

C1086

100p

C1087

R1015

100

R1014

68

PA_ON0

PA_ON1

PA_R0

PA_R0

PA_R0

WCDMA_1900_TX_OUT

WCDMA_2100_TX_OUT

WCDMA_900_TX_OUT

PDET_IN

PA_ON2

W1900

W1900

W2100W2100

W900

W900

9.5dB

TP3TP2

TP1

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4. TROUBLE SHOOTING



Set the phone is ON and PDM is 210

Check TP3

Over 21 dBm?

Check TP2

RA_R0 2.6V

Check TP1

Over 10 dBm?

RF TX Level is OK

Yes

No

Change the board

Check MSM8225

Yes

No

Check RTR6285A

Yes

No

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4. TROUBLE SHOOTING



4.5.5 Checking RF Rx Level

TP1

Test Point (RF Rx Level)

TP3 TP4

TP5

TP2

Bias

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4. TROUBLE SHOOTING



2.2nC1001L1001

2.7n

L1004

0.5p

68

R1003

R1004 R1005

L1005

100n

SW1002

43

2

1ANT COMMON

G3 G4

R1002

2.2K

SW1001

G1

ANTG2

39p

C1015

GND12

GND10

27

GND9

26

GND8

25

GND6

23

GND7

24

PGND1341

PGND1442

PGND1543

PGND1644

HB_IN1

GND11

28

LB_IN3

L1002

DNIL1003

DNI

GSM_HB_TX

GSM_PA_RAMP

0603

DCS(1710-1785 MHz)

TP1

5.6n

L1025

FL1005

75

84

92

3

16ANT RX

TX

GND1 GND6

GND2 GND5

GND3 GND4

L1035

1.8n

100p

C1063

12n

L1029

FL1003

75

84

92

3

16ANT RX

TX

GND1 GND6

GND2 GND5

GND3 GND4

L1044

10n

L1034

0.5p

L1032

1n

100p

L1033

L1041

100p

L1043

DNI

L1023

100p

DNI

C1074

100p

L1042

C1092

DNI

1880,1960MHz

FL1008

75

84

92

3

16ANT RX

TX

GND1 GND6

GND2 GND5

GND3 GND4

L1024

DNI

WCDMA_1900_RTX

WCDMA_2100_RTX

WCDMA_900_RTX

897.5MHz, 942.5MHz

1950MHz, 2140MHz

W2100 TX(1920 -1980 MHz)

W900 TX(880 - 915 MHz)W850 TX(824 - 849 MHz)

W1900 TX(1850 -1910 MHz)

TP2

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4. TROUBLE SHOOTING



R1018

27K

C1094 10n

3pC1116

9.1n

L1058

3.3n

L1047

I

22p

C1101

C1112

22p

22p

C1120

L1054

2.7n

C1106

10pU1006

9

8

7

6

5

10

4

11

3

12

2

13

1

14

15

16

17PGND

RFOUTM

RFOUTH

RFOUTL

NC

RREF

VGS

VEN1

VCC

VEN2

RFGNDH1

RFIN

L

RFGNDH2

RFINM

RFINH

RFGNDM1

RFGNDM2

VREG_RF_2.7V

C1093

10p

ANT_SEL0

ANT_SEL2

TP3

Bias

2.2

p

C

1111

C1119

36

L1055

100p

DNI

C1109

C1115

2.2

p

C1114

68

C1113

DNI 18n

L1057

C1121

1n

C1118

6.8n

C1117

1n

DNI

L1059

942.5MHz

FL1011

45

1

32

G1 O1IN

G2 O2

FL1012

1960MHz45

1

32

G1 O1IN

G2 O2

RX_WCDMA_1900_P

RX_WCDMA_1900_M

RX_WCDMA_900_P

RX_WCDMA_900_M

3.9p

C1073

C1085

3.9p

C1075

DNI

L1037

100p

DNI

C1081L1040

1.2n

L1036

1.2n

FL1006

2140MHz

45

1

32G1 O1

ING2 O2

GND

RX_WCDMA_2100_MIX_INM

RX_WCDMA_2100_MIX_INP

TP4

TP5

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4. TROUBLE SHOOTING



Set the Phone Rx is ON

Check BIAS over2.1 V ?

Check TP1 Signal exist ?


Check bias block soldering

Yes

No

Change the board

Check RF Switch (M/S)

Yes

No




Check TX Module Reer 1.4

Check Duplexer

Check LNA

Check RTR6285 and Rx SAW lter

Yes

Yes

Yes

Yes

No

No

No

No

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4. TROUBLE SHOOTING



2. Check ANT. SW Module

1. Check TCXO Block

3. Check RF TRX Level

START

4. Re-download SW & Cal

4.6 Checking GSM Block

1

23

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4. TROUBLE SHOOTING



4.6.1 Checking TCXO Block

Reer to 4.3

4.6.2 Checking FEM Block

Reer to 4.4

4.6.3 Checking RF TX level

TP1

TP3

TP2

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4. TROUBLE SHOOTING



Schematic o GSM/DCS/PCS Tx Block

2.2nC1001L1001

2.7n

L1004

0.5p

68

R1003

100

R1004 R1005

100

L1005

100n

SW1002

43

2

1ANT COMMON

G3 G4

C1034

DNI

C1035 D

NI

C1036

DNI

DNI

C1038

R1002

2.2K

68

R1007

R1009

100 100

R1008

SW1001

G1

ANTG2

39p

C1015

47p

C1033

U1002

GND12

VBATT5

GND10

27

GND219

GND9

26

GND320

GND8

25

GND421

ANT18

PGND331

PGND230

PGND129

GND522

GND6

23

GND7

24

PGND634

PGND533

PGND432

PGND7

35

PGND8

36

PGND9

37

PGND1038

PGND1139

PGND1240

PGND1341

PGND1442

PGND1543

PGND1644

HB_IN1

GND11

28

LB_IN3

VAPC4

BS26

BS17

TXEN_8

MODE

9

WCDMA317

TEMP

10

RX4

11

RX3

12

RX2

13

RX1

14

WCDMA115

WCDMA216

L1002

DNIL1003

DNI

C1032

10u

ANT_SEL0

ANT_SEL3

ANT_SEL2

ANT_SEL1

+VPWR

GSM_HB_TX

GSM_LB_TX

GSM_PA_RAMP

0603

0603

0603

DCS(1710-1785 MHz)


10dB Atten.

2mm FEMGSM900(880-915MHz)

GSM850(824-849MHz)

TP1

TP3

TP2

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4. TROUBLE SHOOTING



Check TP1

I GSM over 31 dBm ?

I DCS/PCS over 28 dBm ?

Check TP2, 3

I GSM(TP2) under 6 dBm ?

I DCS/PCS(TP3) under 6 dBm ?

Check RTR & PAD

GSM/DCS/PCSTx is OK

Check other part

Check Tx Module(ASM+EDGE PAM)

Reer to 4.4

Check soldering and components

Check TCXO BlockReer to 1.3

Yes

Yes

No Problem

Change the board

Start

No

No

Still exist Problem

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4. TROUBLE SHOOTING



4.6.4 Checking RF Rx Block

TP1

TP2

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4. TROUBLE SHOOTING



Schematic o GSM/DCS/PCS Rx Block

4.7p

L1022

4.7p

L1020

L1021

4.3n8.2n

C1057

C1053

DNI

2.7n

C1054

C1019

100p

100p

L1009

2.7n

L1017

56n

L1008

L1015

2.7p

L1018

2.7p

2.2p

L1013

2.2p

L1010

C1014

1.8p

C1024

1.8p

39n

C1025

L1007

18n

4.7n

L1016

15n

L1012

L1019

DNI

C1037

DNI

881.5MHz,942.5MHzFL1001

103

52

81

9

6

74IN_881_5 OUT_881_5_1

OUT_881_5_2

OUT_942_5_1

IN_942_5 OUT_942_5_2

GND1 GND3

GND2 GND4

FL10021842.5MHz,1960MHz

103

52

81

9

6

74IN_1842_5 OUT_1842_5_1

OUT_1842_5_2

OUT_1960_1

IN_1960 OUT_1960_2

GND1 GND3

GND2 GND4

L1011

DNI

L1006

DNI

GND

GSM900_RX_P

GSM900_RX_M

DCS_RX_M

DCS_RX_P

GSM850_RX_M

GSM850_RX_P

PCS_RX_M

PCS_RX_P

GSM(869-894 MHz)

GSM(925-960 MHz)

PCS(1930-1990 MHz)

DCS(1805-1880 MHz)

GSM QuadTP2

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74/220

4. TROUBLE SHOOTING



Set the Phone Rx is ON



Check RF Switch (M/S)

Yes

No

Change the board

Check FEM Block Reer to 4.4

Yes

No

2.2nC1001L1001

2.7n

L1004

0.5p

68

R1003

100

R1004 R1005

100

L1005

100n

SW1002

43

2

1ANT COMMON

G3 G4

R1002

2.2K

R1007

SW1001

G1

ANTG2

39p

C1015

U1002

GND12

VBATT5

GND

10

27

GND219

GN

D9

26

GND320

GN

D8

25

GND421

ANT18

PGND1

GND522

GN

D6

23

GN

D7

24

PGND1341

PGND1442

PGND1543PGND1644

HB_IN1

GND

11

28

LB_IN3

VAPC4

BS2

BS1

TXEN_

WCDMA3

WCDMA2

L1002

DNIL1003

DNI

GSM_HB_TX

GSM_PA_RAMP

0603

DCS(1710-1785 MHz)


FEM

TP1

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4. TROUBLE SHOOTING



4.7 GPS/WIFI/BT RF Component

RF Component(GPS)

Reerence Description

CN1001ANTENNA PAD

connected to Carrier type antenna

FL1006 GPS SAW FILTER

U1007 GPS LNA

CN1001

U1007

FL1006

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4. TROUBLE SHOOTING



RF Component(WIFI)

Reerence Description

CN9001ANTENNA PAD

connected to Carrier type antenna

U9001 BT module

U9003 WiFi module

FL9003 FEM

U9001FL9003

U9003

CN9001

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4. TROUBLE SHOOTING



GPS Signal PATH (main board bottom)

GPS Rx PATH

4.8 GPS/WIFI/BT SIGNAL PATH

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4. TROUBLE SHOOTING



WiFi / BT Signal PATH

WiFi / BT Tx and Rx PATH

WLAN RXBT TRX

WLANTX

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4. TROUBLE SHOOTING



4.9 GPS/WIFI/BT Trouble shooting

4.9.1 A-GPS Block

TP2

TP1

CN1001

FEED

C1129

1n

DNIL1051L1050

8.2n

C1097

3.9n

U1007

3

2

5

4

1

RF_

IN

FIL_OUT

VDD

S_D

GND

L1048

3.3n

L1056

3.3n

C1107

DNI

R1017

12

L1053

4.7n

R1013

12DNI

C1100

6.8pC1110

1575.42 MHz

FL1009

52

41

3G3

I N OUT

G1 G2

C1099

DNI

C1108

DNI

VREG_RF_2.7V

18p

C1104

0.1u

C1105

GPS_MODE GPS_IN

Near To LNA

LNA for the GPS

for contacting to GND

TP2

TP1

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4. TROUBLE SHOOTING



Set the phone GPS is ON

Check TP1

About 2.7V?Check power LRC lter soldering

No

Yes

Check TP2About 2.6V?

Check SW and NV itemNo

Yes

Change the board

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4. TROUBLE SHOOTING



4.9.2 WLAN/BT/FM Block

START

1. Check the Power

3. Check the Module

2. Check the Clock

Component Change

1

2

3

31

1

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4. TROUBLE SHOOTING



CN9001

FEED

L9011

1.8n

L9012

DNI

C9057

0.5p

C9034

22p

DNI

C9031

C9055

100p

C9025

100p

C9032

DNI

DNI

C9027

2.4n

L9013

C9033

DNI

FL9003

2400MHz,2500MHz

1311

7

12

2

4

10

9

8

6

5

1

3WLAN_RX

WLAN_TX

BT_TRX

GND1

GND2

GND3

GND4

TR_SW0

TR_SW1

TR_SW2

ANT

CPLPGND

C9029

DNI

3.9n

L9010

C9028

DNI

C9026

DNI

BT_RF_QCT

WLAN_SW_[0]WLAN_SW_[1]

WLAN_SW_[2]

WLAN_PWR_DET_IN

WLAN_RF_RX

WLAN_RF_TX

for contacting to GND

BT/WI-FI FRONT-ENDModule part

SW0 SW1 SW2

WiFi Rx-ANT HIGH LOW LOW

WiFi Tx-ANT LOW HIGH LOW

BT-ANT LOW LOW HIGH

ANTENNA SWITCH MODULE LOGIC

2.2K

R8008

2.2K

R8007

VREG_MSME_1.8V

U9001

334

35

30

17

20

52

26

27

25

45

5

15

12

13

19

32

21

55

50

37

54

10

4

14

24

31

57

40

47

36

53

42

58

51

56

46

49

43

29

28

33

6

11172

1898

22

16

44

39

38

48

23

41

GND2

GND3

AGND_

FM1

AGND_

FM2

AGND_

FM3

AGND_

FM4

GND4

AGND_

FM

AGND_

BT1

AGND_

BT2

AGND_

BT3

AGND_

BT4

AGND_

BT5

AGND_

BT6

AGND_

BT7

GND1

SYS_RST_N

I2C_SDA

I2C_SCL

FM_HRX_IN

FM_PRXTX_IO

FM_I2S_SD

FM_I2S_WS

FM_I2S_SCK

BT_PCM_IN

BT_PCM_CLK

SLEEP_CLK

BT_UART_RXD

BT_UART_TXD

BT_UART_CTS

BT_UART_RTS

VDD_IO

VDD_XO_BIAS

VREG_DIG

VREG_ANA

VDD_LDO_IN

VDD_FM_1P3_1

VDD_FM_1P3_2

VDD_FM_1P3_3

VDD_FM_1P3_4

VDD_DIG_1P3

VDD_FM_DAC

VDD_BT_PA

VDD_BT_1P3_1

VDD_BT_1P3_2

VDD_BT_1P3_3

VDD_BT_1P3_4

FM_

RDS_

INT

SYS_

CLK

FM_

LO_

L

FM_

LO_

R

BT_

PCM_

OUT

BT_

PCM_

SYNC

BT_

CLK_

REQ

BT_

ACTIVE

BT_

STATUS

TX_

CONFIRM

BT_

RFIO

0

R9004

C9020

0.1u

22p

C9001

10n

C9021

L9004

82n

1MR9006

C9011

1u

C9012

10n

C9013

1 0 p 1 0 n

C9014

10p

C9015C9018

1 0 n 1 0 n

C9019

+3V_WLAN_WCN

82nL9003

1M

R9001

47p

C9005

VREG_MSME_1.8V

C9016

4.7u

C9017

4.7u

68n

L9002

SLEEP_CLK

BT_PCM_OUT

BT_PCM_OUT

BT_

PCM_

IN

BT_UART_RXBT_UART_TX

FM_

RDS_

INT

FM_

L

FM_

R

BT_PCM_CLK

BT_PCM_CLK

BT_PCM_SYNC

BT_

PCM_

SYNC

BT_UART_CTS

BT_UART_RTS

BT_

FM_

CLK_

WCN

FM_ANT

NFC_WCN_HWI2C_SDANFC_WCN_HWI2C_SCL

BT_

FM_

CLK_

REQ_

WCN

BT_RST_N

BT_

RF_

QCT

BT_

ACTIVE

BT_

PRIORITY

WLAN_

ACTIVE

BT/FM Module : WCN2243

closet

op

in13

close

top

in5

closet

op

in54

closet

op

in37

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4. TROUBLE SHOOTING



[Figure] Schematic o WiFi/BT module

U9003

63

33

53

56

45

71

84

75

82

28

13

16

6

15

14

23

11

21

12

17

22

87

80

41

29

20

39

19

26

25

9

27

18SLEEP_CLK

GND_D1

DNC1

GND_D2

GND_D3

WLAN_RST_N

WLAN_ACTIVE

BT_PRIORITY

BT_ACTIVE

TCXO_IN

RF_RX

PDET_IN

PA_EN

WLAN_CLK_REQ

TR_SW_EN_0

TR_SW_EN_1

TR_SW_EN_2

SDIO_CMD

SDIO_CLK

SDIO_DATA3

SDIO_DATA2

SDIO_DATA1

SDIO_DATA0

DNC2

PLL_EXT_LPF

GND_A

RF_TX_DA

RF_TX_PA

GND_A1

GND_A2

GND_A3

GND_A4

REXT

C9045

470p

C9051 1n

10K

R9009

SLEEP_CLK

WLAN_CLK

WLAN_CMD

WLAN_SDIO[3]

WLAN_SDIO[2]

WLAN_SDIO[1]

WLAN_SDIO[0]

WLAN_RST_N

WLAN_CLK_WCN

WLAN_CLK_REQ_WCN

BT_ACTIVE

BT_PRIORITY

WLAN_ACTIVE

WLAN_SW_[0]

WLAN_SW_[1]

WLAN_SW_[2]

WLAN_PWR_DET_INWLAN_RF_RX

WLAN_RF_TX

C9046

10u10u

C9056

FB9002

60

2.2u

C9042

C9054

2.2u

DNI

C9047

C9043

220n

C9037

100n

0.1u

C9052

100p

C9040

100n

C9041

100n

C9039

C9044

10n

10n

C9048

100p

C9049C9050

100p

100p

C9053

+1V2_WLAN_WCN

C9030

10n

+1V8_WLAN_TCXO

C9038

4.7u

+3V_WLAN_WCN

VREG_MSME_1.8V

+1V3_MSM_A3_WCN

+1V2_MSM_A2_WCN

240FB9001

U9003

77

85

64

58

30

43

40

42

55

57

69

68

59

50

83

65

44

61

73

72

60

34

52

86

47

37

32

24

70

10

1

7

3

79

49

62

76

54

67

81

66

51

78

74

35

4

2

8

38

36

5

48

46

31VDD_CORE1

VDD_CORE2

VDD_CORE3

VDD_CORE_AON1

VDD_CORE_AON2

VDD_CORE_AON3

VDD_IO

VDD_FEM

VDD_SDIO

VDD_RFA1

VDD_RFA2

VDD_PA

VDD_TCXO

VDD_RFA3

VDD_RFA4

VDD_RFA5

VDD_RFA6

VDD_RFA7

VDD_RFA8

VDD_RFA9

GND_A21

GND_D1

GND_D2

GND_D3

GND_D4

GND_A2

GND_D5

GND_D6

GND_D7

GND_D8

GND_A3

GND_A4

GND_D9

GND_A5

GND_A6

GND_A7

GND_A8

GND_A9

GND_A10

GND_A11

GND_A12

GND_A13

GND_A14

GND_A15

GND_A16

GND_A17

GND_A18

GND_A19

GND_A20

GND_A1

GND_A22

GND_A23

VDD_RFA10

VDD_RFA11

colse to pin78

Wi-Fi : WCN1314

Wi-Fi : WCN1314

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4. TROUBLE SHOOTING



START

TP1,2,3 is OK? Check the power blockNo

Yes

SDIO ok?

UART ok?Module Check

No

Yes

Board Change

Test point Description

Test point Net name Description

TP1 +3V_WLAN_WCN Power or BT/WiFi BB core and WiFi power Amp. (V Batt)

TP2 VREG_MSME_1.8V Power or BT power Amp.(1.8V)

TP3 VREG_MSME_1.8V Power or host interace (1.8V)

TP3

TP1

TP2

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4. TROUBLE SHOOTING



4.10 Power on Trouble shooting

Power On sequence o P714 is :

Power key press -> KPD_PWR_N go to low -> PM8029 Power Up -> VREG_MSMC1_1.1V (L4002), VREG_MSMC2_1.1V

(L4003), VREG_MSME_1.8V (L4004), VREG_P3_2.85V (C4062), VREG_MSMA1_2.6V (C4057), VREG_MSMA2_1.2V (C4053)

VREG_TCXO_2.85V (C4058) power ON -> Phone booting and PS_HOLD(R4010) go to High

KB101

VA102

100

R112KPD_PWR_N

START

Battery voltage.

higher than 3.2V?

R112(TP1) FPCB go to low

when key press?

Is clock ok? C2027(TP2) : 19.2MHz

X4001(TP10) : 32.768KHz

Change or charging the Battery

Check soldering o R112

Change the Main board

No

No

No

No

Yes

Yes

Yes

Yes

VREG_MSMC1_1.1V(TP3),VREG_MSMC2_1.1V(TP4),

VREG_MSME_1.8V(TP5) ,VREG_PLL_1.1V(TP6),

VREG_TCXO_2.85V(TP7), VREG_MSMA1_2.6V(TP8)

VREG_MSMA2_1.2V(TP9) power up?

Re-download sw

Change the Main board

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4. TROUBLE SHOOTING



PM8029 Power sequence

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4. TROUBLE SHOOTING



TP1 : R112 KPD_PWR_N

TP2 : C2027 TCXO 19.2MHz

TP3 : L4002 VREG_MSMC1_1.1V

TP4 : L4003 VREG_MSMC2_1.1V

TP5 : L4004 VREG_MSME_1.8V

TP6 : C4054 VREG_PLL_1.1V

TP7 : C4058 VREG_TCXO_2.85V

TP8 : C4057 VREG_MSMA1_2.6V

TP9 : C4053 VREG_MSMA2_1.2V

TP10 : X4001 sleep X-tal 32.768KHz

< P714 Main board TOP >

< P714Main board BOT >

< P714 F-LOWER >

TP2

TP5

TP9

TP10 TP6

TP8

TP3TP4

TP3

TP1

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en_lg-p714_svc_eng_130308

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