Lg A395 User manual

Internal Use Only

Service Manual

LG-A395

Date: April, 2013 / Issue 1.0

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 H/W Features..............................................................................................7

2.2 Technical Specication...........................................................................9

3. TECHNICAL BRIEF................................................................ 14

3.1 Digital Main Processor......................................................................... 14

3.2 Power Management ............................................................................ 23

3.3 FEM with integrated Power Amplier Module (RF7182) ...... 27

3.4 Clocks......................................................................................................... 29

3.5 RFSYS of MT6253 (U101).................................................................... 31

3.6 MEMORY(H9DA1GH25HBMMMR, U100 ) ................................... 33

3.7 SIM Card Interface................................................................................. 37

3.8 Micro-SD Card Interface..................................................................... 41

3.9 LCD Interface........................................................................................... 42

3.10 Battery Charger Interface................................................................ 44

3.11 Keypad Interface................................................................................. 45

3.12 Audio Front-End.................................................................................. 47

3.13 Camera Interface................................................................................. 49

3.14 KEY BACLKLIGHT LED Interfac....................................................... 51

3.15 Vibrator Interface ................................................................................ 52

4. TROUBLE SHOOTING .......................................................... 53

4.1 RF Component ....................................................................................... 53

4.2 RX Trouble ................................................................................................ 54

4.3 TX Trouble................................................................................................. 58

4.4 Power On Trouble.................................................................................. 62

4.5 Charging Trouble................................................................................... 64

4.6 Vibrator Trouble ..................................................................................... 67

4.7 LCD Trouble ............................................................................................. 69

4.8 Camera Trouble...................................................................................... 73

4.9 Speaker Trouble ..................................................................................... 76

4.10 Earphone Trouble ............................................................................... 78

4.11 Receiver Trouble.................................................................................. 81

4.12 Microphone Trouble.......................................................................... 83

4.13 SIM Card Interface Trouble.............................................................. 85

4.14 KEY backlight Trouble....................................................................... 97

4.15 Micro SD Trouble................................................................................. 99

4.16 Bluetooth Trouble.............................................................................102

4.17 FM Radio Trouble ..............................................................................106

5. DOWNLOAD....................................................................... 109

6. BLOCK DIAGRAM...............................................................129

7. CIRCUIT DIAGRAM ............................................................135

8. BGA PIN MAP .................................................................... 139

9. PCB LAYOUT.......................................................................141

10. ENGINEERING MODE ......................................................143

11. CALIBRATION...................................................................145

12. HIDDEN MENU................................................................. 165

13. EXPLODED VIEW & REPLACEMENT PART LIST .............170

13.1 EXPLODED VIEW................................................................................170

13.2 Replacement Parts ...........................................................................171

13.3 Accessory .............................................................................................185

Only for training and service purposes

LGE Internal Use Only

1. INTRODUCTION

Only for training and service purposes

LGE Internal Use Only / 131

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

Only for training and service purposes

LGE Internal Use Only

1. INTRODUCTION

Only for training and service purposes

LGE Internal Use Only / 131

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.

1. INTRODUCTION

Only for training and service purposes

LGE Internal Use Only

1. INTRODUCTION

Only for training and service purposes

LGE Internal Use Only / 131

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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LGE Internal Use Only

1. INTRODUCTION

Only for training and service purposes

LGE Internal Use Only / 131

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

Only for training and service purposes

LGE Internal Use Only / 131

2.1 H/W Features

2. SYSTEM SPECIFICATION

Item Feature Comment

Standard Battery Lithium Ion, 3.7V 1500mAh

Stand by TIME >993 hr., Min.@PP9

Stand by time >1145 hr., Min.@PP5

Talk time

>8.0hr., Min.@GSM900, PL=5

>22.0 hr., Min.@GSM900, PL=13

>11 hr., Min.@PCS, PL=0

>27 hr., Min.@PCS, PL=9

Charging time Approx. 3 hours 30 min.

RX Sensitivity GSM, EGSM: -109dBm, DCS: -109dBm

TX output power GSM, EGSM: 32.3dBm(Level 5),

DCS , PCS: 29.5dBm(Level 0)

SIM card type 3V Small

Display MAIN : TFT 320 ×240(QVGA) pixel 262K Color

Status Indicator

KEY TOTAL 22EA

Hard icons. Key Pad

Numeric(12EA : 0 ~ 9, #, *) Navigation Key OK Key(5EA)

Menu Key, Clear Key, Send Key, End Key,

SIM Switch Key(5EA)

ANT Internal

EAR Phone Jack Yes(3.5Ø)

PC Synchronization Yes

Speech coding EFR/FR/HR

Data and Fax Yes

GPRS compatibility Class 10

Vibrator Yes

Loud Speaker Yes

Voice Recoding Yes

Microphone Yes

2. PERFORMANCE

2.1 H/W Features

2. PERFORMANCE

Only for training and service purposes

LGE Internal Use Only

Only for training and service purposes

LGE Internal Use Only / 131

2. SYSTEM SPECIFICATION

Item Feature Comment

Speaker/Receiver 18 x 10 (Speaker & Receiver Dual Mode Assembly)

Travel Adapter Yes

MIDI SW MIDI (Mono SPK)

Camera 1.3M FF

Bluetooth / FM Radio Bluetooth version 2.1 / 76~108MHz supported

2. PERFORMANCE

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LGE Internal Use Only

Only for training and service purposes

LGE Internal Use Only / 131

2.2 Technical Specification

Item Description Specification

1 Frequency Band

GSM850 EGSM

TX: 824 ~ 849 MHz TX: 880 ~ 915MHz

RX: 869 ~ 894 MHz RX: 925 ~ 960 MHz

DCS

TX: 1710 ~ 1785 MHz

RX: 1805 ~ 1880 MHz

PCS

TX: 1850 ~ 1910 MHz

RX: 1930 ~ 1990 MHz

2 Phase Error RMS < 5 degrees

Peak < 20 degrees

3 Frequency Error < 0.1 ppm

4 Power Level

Level Power Toler. Level Power Toler.

6 31dBm ±3dB 14 15dBm ±3dB

7 29dBm ±3dB 15 13dBm ±3dB

8 27dBm ±3dB 16 11dBm ±5dB

9 25dBm ±3dB 17 9dBm ±5dB

10 23dBm ±3dB 18 7dBm ±5dB

11 21dBm ±3dB 19 5dBm ±5dB

12 19dBm ±3dB

GSM850/EGSM

5 33dBm ±2dB 13 17dBm ±3dB

Level Power Toler. Level Power Toler.

1 28dBm ±3dB 9 12dBm ±4dB

2 26dBm ±3dB 10 10dBm ±4dB

3 24dBm ±3dB 11 8dBm ±4dB

4 22dBm ±3dB 12 6dBm ±4dB

5 20dBm ±3dB 13 4dBm ±4dB

6 18dBm ±3dB 14 2dBm ±5dB

7 16dBm ±3dB 15 0dBm ±5dB

DCS/PCS

0 30dBm ±2dB 8 14dBm ±3dB

2. SYSTEM SPECIFICATION

2.2 Technical Specication

2. PERFORMANCE

Only for training and service purposes

LGE Internal Use Only

Only for training and service purposes

LGE Internal Use Only / 131

Output RF Spectrum

(due to switching

transient)

1,800 -24

5 Output RF Spectrum

(due to modulation)

Offset from Carrier (kHz). Max. dBc

100 +0.5

200 -30

250 -33

400 -60

600~ <1,200 -60

1,200~ <1,800 -60

1,800~ <3,000 -63

3,000~ <6,000 -65

6,000 -71

GSM850/ EGSM

Offset from Carrier (kHz). Max. dBc

100 +0.5

200 -30

250 -33

400 -60

600~ <1,200 -60

1,200~ <1,800 -60

1,800~ <3,000 -65

3,000~ <6,000 -65

6,000 -73

DCS/PCS

GSM850/ EGSM

Offset from Carrier (kHz). Max. dBm

400 -19

600 -21

1,200 -21

Item Description Specification

2. SYSTEM SPECIFICATION

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