Lg Lg-p768 User manual

Internal Use Only

Service Manual

LG-P768

Date: October, 2012 / Issue 0.9

Only for training and service purposes

LGE Internal Use Only

Table Of Contents

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

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

1.2 Regulatory Information.........................................................................3

1.3 Abbreviations.............................................................................................5

2. PERFORMANCE...................................................................... 7

2.1 Product Name............................................................................................7

2.2 Supporting Standard..............................................................................7

2.3 Main Parts : GSM Solution.....................................................................7

2.4 HW Features...............................................................................................8

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

2.6 HW SPEC. ................................................................................................. 13

2.7 P768 Figures............................................................................................ 26

3. CIC AND SERVICE CENTER .................................................. 27

3.1 CIC FAQ...................................................................................................... 27

4. TROUBLE SHOOTING .......................................................... 44

4.1 RF Component ....................................................................................... 44

4.2 SIGNAL PATH........................................................................................... 46

4.3 Checking TCXO Block........................................................................... 49

4.4 Checking WCDMA Block .................................................................... 51

4.5 Checking GSM Block............................................................................ 57

4.6. GPS/WIFI/BT RF components.......................................................... 63

4.7 GPS/WIFI/BT SIGNAL PATH ................................................................ 65

4.8 Power ON Troubleshooting............................................................... 67

4.9 Charger Troubleshooting................................................................... 71

4.10 USBTrouble shooting ....................................................................... 73

4.11 Audio trouble....................................................................................... 76

4.12 Camera trouble(8M/ 0.3M).............................................................. 86

4.13 Main LCD trouble................................................................................ 91

4.14 SIM detect Trouble shooting.......................................................... 94

4.15 Vibrator Troubleshooting ................................................................ 96

4.16 Compass or Accelerometer Sensor on/o trouble............... 99

4.17 Proximity Sensor on/o trouble.................................................101

4.18 Touch trouble .....................................................................................103

5. DOWNLOAD.......................................................................105

6. BLOCK DIAGRAM...............................................................125

7. CIRCUIT DIAGRAM ............................................................144

8. BGA PIN MAP ....................................................................159

9. PCB LAYOUT.......................................................................168

10. CALIBRATION...................................................................178

11. HIDDEN MENU.................................................................198

12. DISASSEMBLE GUIDE......................................................222

13. EXPLODED VIEW & REPLACEMENT PART LIST .............231

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LGE Internal Use Only

1. INTRODUCTION

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LGE Internal Use Only 4/140

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 company’s employees, agents, subcontractors, or person working on your

company’s 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 this phone or compatibility with the

network, 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 this model 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.

1. INTRODUCTION

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1. INTRODUCTION

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LGE Internal Use Only 5/140

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.

F. Pictures

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

different.

G. Interference and Attenuation

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.

2. INTRODUCTION

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LGE Internal Use Only

1. INTRODUCTION

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LGE Internal Use Only 6/140

1.3 Abbreviations

For the purposes of this manual, following abbreviations apply:

Offset Phase Locked LoopOPLL

Light Emitting DiodeLED

Low Drop OutputLDO

Liquid Crystal DisplayLCD

Intermediate FrequencyIF

International Portable User IdentityIPUI

Global System for Mobile CommunicationsGSM

General Purpose Interface BusGPIB

Gaussian Minimum Shift KeyingGMSK

Flexible Printed Circuit BoardFPCB

Electrostatic DischargeESD

Electrical Erasable Programmable Read-Only MemoryEEPROM

Digital Signal ProcessingDSP

dB relative to 1 milli wattdBm

Digital Communication SystemDCS

Digital to Analog ConverterDAC

Constant Current – Constant VoltageCC-CV

Bit Error RatioBER

BasebandBB

Automatic Power ControlAPC

1. INTRODUCTION

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1. INTRODUCTION

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Wireless Application Protocol

WAP

Voltage Control Temperature Compensated Crystal OscillatorVCTCXO

Voltage Controlled OscillatorVCO

Universal Asynchronous Receiver/TransmitterUART

Time Division Multiple AccessTDMA

Time Division DuplexTDD

Travel AdapterTA

Side Tone Masking RatingSTMR

Pseudo SRAMPSRAM

Static Random Access MemorySRAM

Sending Loudness RatingSLR

Subscriber Identity ModuleSIM

Surface Acoustic WaveSAW

Real Time ClockRTC

Root Mean SquareRMS

Receiving Loudness RatingRLR

Radio FrequencyRF

Public Switched Telephone NetworkPSTN

Phase Locked LoopPLL

Programmable Gain AmplifierPGA

Printed Circuit BoardPCB

Power Amplifier ModulePAM

1. INTRODUCTION

2. PERFORMANCE

Only for training and service purposes

LGE Internal Use Only

2. PERFORMANCE

LG-P768 Product SPEC

2.1 Product Name

LG-P768 : WCDMA 900/2100+GSM850/EGSM/DCS/PCS

(HSUPA 5.8Mbps(cat6)/HSDPA 21Mbps(cat14)/GPRS Class33/EDGE Class33)

2.2 Supporting Standard

Supporting Standard

WCDMA(FDD1,8)/EGSM/GSM850/DCS1800/PCS1900

with seamless handover

Phase 2+(include AMR)

SIM Toolkit : Class 1, 2, 3, C-E

Frequency Range

WCDMA(FDD1) TX : 1920 – 1980 MHz

WCDMA(FDD1) RX : 2110 – 2170 MHz

WCDMA(FDD8) TX : 880 – 915 MHz

WCDMA(FDD8) RX : 925 – 960 MHz

EGSM TX : 880 – 915 MHz

EGSM RX : 925 – 960 MHz

GSM850 TX : 824 – 849 MHz

GSM850 RX : 869 – 894 MHz

GSM900 TX : 880 – 915 MHz

GSM900 RX : 925 – 960 MHz

DCS1800 TX :1710 – 1785 MHz

DCS1800 RX : 1805 – 1880 MHz

PCS1900 TX : 1850 – 1910 MHz

PCS1900 RX : 1930 – 1990 MHz

Application Standard

2.3 Main Parts : GSM Solution

Item Part Name Comment

AP Chip OMAP4430 : TI

CP Chip XMM6260 : IMC

2.1 Product Name

LG-P768 : WCDMA 900/2100+GSM850/EGSM/DCS/PCS

(HSUPA 5.8Mbps(cat6)/HSDPA 21Mbps(cat14)/GPRS Class33/EDGE Class33)

2.2 Supporting Standard

2.3 Main Parts : GSM Solution

2. PERFORMANCE

Only for training and service purposes

LGE Internal Use Only

LG-P768 Product SPEC

2.4 HW Features

Item Feature Comment

Form Factor DOP type

Battery

1) Capacity

Standard : Li-Ion , 2150mAh(Typ.)

2) Packing Type : Hard Pack

Size Standard :

131.9 x 68.2 x 9.1 mm

Weight 125 g With Battery

PCB Any Layer , 0.8t

Stand by time 2G Up to 450 hrs

3G Up to 450 hrs

@ Paging Period 5 (2G)

@ DRX 7 (3G)

Charging time 3.5 hrs @ Power Off / 2150mAh

Talk time

2G Up to 350 min

2G Up to 420 min

3G Up to 420 min

@ Tx=Max(EGSM)

@ Tx=Max(DCS,PCS)

@ Tx = 12dBm (3G)

RX sensitivity

WCDMA(FDD1) : -106.7dBm

WCDMA(FDD8) : -103.7 dBm

EGSM : -102 dBm

GSM850 : -102 dBm

DCS 1800 : -102 dBm

PCS 1900 : -102 dBm

TX output power

WCDMA/

GSM/

GPRS

WCDMA :

24dBm/3.84MHz,+1/-

3dBm

EGSM : 33dBm

GSM850 : 33 dBm

DCS 1800 : 30 dBm

PCS 1900 : 30 dBm

GPRS

compatibilit

EDGE

EGSM : 27 dBm

GSM850 :27dBm

DCS 1800 : 26 dBm

PCS 1900 : 26 dBm

GPRS compatibility

GPRS

Class 33

EDGE compatibility EDGE Class 33

SIM card type Plug-In SIM

2.85V /1.8V

2.4 HW Features

2. PERFORMANCE

Only for training and service purposes

LGE Internal Use Only

LG-P768 Product SPEC

Display Main LCD (qHD)

TFT Main LCD(4.7”,960x540)

Built-in Camera 8M Camera, 0.3M secondary 8M AF BSI CMOS CAM

Status Indicator No

Keypad Function Key : 3

Side Key : 3

Function Key:

Home, Back, menu,

Side Key :

Volume up, down, power

key

ANT Main : LDS(Laser Direct Structure) type

Sub : FPCB type

System connector 5 Pin Micro USB 2.0 HS

Ear Phone Jack 3.5Phi, 4 Pole, Stereo

PC synchronization Yes

Memory(AP) eMMC : 4GB

LP-DDR2 : 1GB

Speech coding FR, EFR, HR, AMR,AMR-WB

Data & Fax Built in Data & Fax support

Vibrator Built in Vibrator

BlueTooth V3.0 HS

MIDI(for Buzzer

Function) 72 Poly, MP3 Ringtone

Music Player MP3/ WMA/AAC/AAC+/WAV/AC3

Video Player MPEG4, H.263, H.264 @ Full HD 30fps/ Divx HD

Camcorder MPEG4, H.264, H.263 @ 3D : 720p 2D : 1080p

30pfs

Voice Recording Yes

Speaker Phone mode

Support Yes

Travel Adapter Yes

CDROM No

Stereo Headset Yes

Data Cable Yes

T-Flash

(External Memory) Yes Up to 32GB

2. PERFORMANCE

Only for training and service purposes

LGE Internal Use Only

LG-P768 Product SPEC

2.5 SW Features

Item Feature Comment

RSSI 0 ~ 4 Levels

Battery Charging 0 ~ 4 Levels Android 4.0 ICS

Key Volume 0 ~ 7 Level

Audio Volume 1 ~ 15 Level

Time / Date Display Yes

Multi-Language Yes

42 languages : UK English, BULGARIAN,

CROATIAN, CZECH, DANISH, DUTCH,

FINNISH, FRENCH, FRENCH BELGIUM,

FRENCH SWIITZERLAND, GERMAN

GERMAN, SWIITZERLAND, GREEK,

HUNGARIAN, ICELANDIC, ITALIAN,

ITALIAN SWIITZERLAND, MACEDONIAN,

NORWEGIAN, POLISH, PORTUGUESE,

ROMANIAN, SERBIAN SLOVAK,

SLOVENIAN, SPANISH, SWEDISH, TURKISH

ESTONIAN, LATVIAN, LITHUANIAN,

RUSSIAN, RUSSIAN ISRAEL, KOREAN, S

CHINESE, T CHINESE TW, BRAZILIAN

PORTUGUESE, SPANISH MEXICO,

CANADIAN FRENCH, US ENGLISH,

ENGLISH AUSTRAILIA, ENGLISH CANADA,

ENGLISH IRELAND

Quick Access Mode Phone / Contacts /

Messaging / Menu

PC Sync Yes

Speed Dial Yes Voice mail center -> 1 key

Profile Yes not same with feature phone setting

CLIP / CLIR Yes

Phone Book

Name / Phone / E-mail /

Address / Groups / Ringtone /

Organization / IM / Notes /

Nickname / Website / Events

There is no limitation on the number of

items.

It depends on available memory amount.

Last Received

Number Yes There is no limitation on the number of

items.

2.5 SW Features

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