LG E425 Service Manual

Internal Use Only

Service Manual

LG-E425

Date: April, 2013 / Issue 1.0

Table Of Contents

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

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

1.2 Regulatory Information .........................................................................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. ................................................................................................. 13

3. CIC AND SERVICE CENTER .................................................. 21

3.1 CIC FAQ ...................................................................................................... 21

4. TROUBLE SHOOTING ..........................................................30

4.1 RF Component .......................................................................................30

4.2 SIGNAL PATH ...........................................................................................32

4.3 Checking TCXO Block ........................................................................... 35

4.4 Checking GSM TX Module(GSM PAM + ASM) Block ...............37

4.5 Checking WCDMA Block ....................................................................40

4.6 Checking GSM Block ............................................................................50

4.7 GPS/WIFI/BT RF Component ............................................................ 57

4.8 GPS/WIFI/BT SIGNAL PATH ................................................................ 59

4.9 GPS/WIFI/BT Trouble shooting ........................................................60

4.10 Power ON Trouble Shooting...........................................................66

4.11 Charging Trouble Shooting ............................................................69

4.12 3M FF Camera Trouble Shooting ..................................................71

4.13 Main LCD trouble ................................................................................ 74

4.14 Proximity Sensor on/o Trouble Shooting ...............................76

4.15 Motion Sensor on/o Trouble Shooting ...................................78

4.16 Compass Sensor on/o Trouble Shooting ...............................80

4.17 DC Motor Trouble Shooting ...........................................................82

4.18 SIM detect Trouble Shooting ......................................................... 84

4.19 Audio Troble ..........................................................................................87

5. DOWNLOAD .........................................................................98

6. BLOCK DIAGRAM ..............................................................118

7. CIRCUIT DIAGRAM ............................................................123

8. BGA PIN MAP .....................................................................132

9. PCB LAYOUT .......................................................................138

10. CALIBRATION ...................................................................140

11. HIDDEN MENU .................................................................160

12.

DISASSEMBLE GUIDE

13. EXPLODED VIEW & REPLACEMENT PART LIST .............174

13.1 EXPLODED VIEW ................................................................................174

13.2 Replacement Parts ...........................................................................175

13.3 Accessory .............................................................................................201

.................................................166

LGE Internal Use Only

- 2 -

Only for training and service purposes

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 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 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.

LGE Internal Use Only

- 3 -

Only for training and service purposes

1. INTRODUCTION

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

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.

LGE Internal Use Only

- 4 -

Only for training and service purposes

2.1 Product Name

LG-E430 : WCDMA900/2100+EGSM/GSM850/DCS/PCS

(HSDPA 3.6Mbps / GPRS Class 12 / EDGE Class 12)

2.2 Supporting Standard

2. PERFORMANCE

2.1 Product Name

LG-E425 : WCDMA900/2100+EGSM/GSM850/DCS/PCS

(HSDPA 3.6Mbps / GPRS Class 12 / EDGE Class 12)

2. PERFORMANCE

2.2 Supporting Standard

Item Feature Comment

Supporting Standard WCDMA(FDD1,8)/EGSM/GSM850/DCS1800/PCS1900 with

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

GSM850 TX : 824 – 849 MHz

GSM850 RX : 869 – 894 MHz

DCS1800 TX : 1710 – 1785 MHz

DCS1800 RX : 1805 – 1880 MHz

seamless handover

Phase 2+(include AMR)

EGSM TX : 880 – 915 MHz

EGSM RX : 925 – 960 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 MSM7225A: Qualcomm

Analog Baseband PM8029 : Qualcomm

RF Chip RTR6285A : Qualcomm

LGE Internal Use Only

- 5 -

Only for training and service purposes

2.4 HW Features

Item Feature Comment

Form Factor DOP type

1) Capacity

2. PERFORMANCE

Battery

Size

Weight 115.5g With Battery

RX sensitivity

WCDMA/

TX

GSM/

Standard : Li-Ion Polymer, 1540mAh

2) Packing Type : Soft Pack

Standard :

102.9X 61.3X11.9 mm

WCDMA(FDD1) : -108 dBm

WCDMA(FDD8) : -108 dBm

EGSM : -107 dBm

GSM850 : -107 dBm

DCS 1800 : -107 dBm

PCS 1900 : -107 dBm

WCDMA : 24dBm/3.84MHz,+1/-3dBm

EGSM : 33dBm

GSM850 : 33 dBm

Class3(WCDMA)

Class4 (EGSM)

Class4 (GSM850)

output

power

GPRS compatibility GPRS Class 12

EDGE compatibility EDGE Class 12

SIM card type

Display

LGE Internal Use Only

GPRS

EDGE

TFT Main LCD(3.2 inch, 320 x 240 )

DCS 1800 : 30 dBm

PCS 1900 : 30 dBm

GSM 900 : 27 dBm

DCS 1800 : 26 dBm

PCS 1900 : 26 dBm

Plug-In SIM

3V /1.8V

Main LCD

- 6 -

Class1 (PCS)

Class1 (DCS)

E2 (GSM900)

E2 (PCS)

E2 (DCS)

Only for training and service purposes

2. PERFORMANCE

Built-in Camera 3M CMOS Camera

Status Indicator Yes

Side Key : Power On

Volume up/down

Keypad

Full Touch Screen

Home key

Side Key : 3

ANT Main : Internal Fixed Type CIMA type

System connector 5 Pin u-USB

Ear Phone Jack 3.5 pi type

PC synchronization Yes

eMMC : 4GB

Memory

LPDDR1 : 4Gb

Speech coding FR, EFR, HR,AMR

Vibrator Built in Vibrator

Blue Tooth Bluetooth 3.0+EDR

MIDI(for Buzzer

SW Decoded 72Poly

Function)

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

Video Player MPEG4, H.264

Camcorder MPEG4 or H.263

Voice Recording Yes

Speaker Phone mode

Yes

Support

Travel Adapter Yes

CDROM No

Stereo Headset Yes

Data Cable Yes

T-Flash

Yes ( Up to 32GB )

(External Memory)

LGE Internal Use Only

- 7 -

Only for training and service purposes

1) RSSI Display

BAR WCDMA mode GSM mode

5 Over -85 ±2dBm Over -91 ±2dBm

54 -86 ±2dBm -91 ±2dBm

43 -92 ±2dBm -96 ±2dBm

32 -98 ±2dBm -99 ±2dBm

21 -102±2dBm -103 ±2dBm

10 -108 ±2dBm -105 ±2dBm

2. PERFORMANCE

Measure RSSI after 10 seconds if you change power.

2) Charging Time

210 minutes 1540 mAh charging

3) Travel Charger

Input : 100 ~ 240 V, 50/60 Hz

Output : 5.0V, 850 mA

4) Battery Type

Li-ion Battery Pack, 1540 mAh

Standard Voltage : 3.7 V, Battery Full Charge Voltage : 4.1V ~ 4.2V

LGE Internal Use Only

- 8 -

Only for training and service purposes

5) Current Consumption

Bluetooth Off

Stand by

Bluetooth

Connected

2. PERFORMANCE

Measurement

Voice Call

Condition

WCDMA

GSM

6) Battery Bar

Battery Bar Specification Unit Battery Bar Specification Unit

BAR 20 (Full) OVER 98%

BAR 20 -> 19 98%  97% BAR 8 -> 7 38%  37%

BAR 19 -> 18 93%  92% BAR 7 -> 6 33%  32%

BAR 18 -> 17 88%  87% BAR 6 -> 5 28%  27%

BAR 17 -> 16 83%  82% BAR 5 -> 4 23%  22%

BAR 16 -> 15 78%  77% BAR 4 -> 3 18%  17%

4.0 mA under

(DRX=7, PP=5)

3.5 mA under

(PP5, PP=5)

7.0 mA under

(DRX=7, PP=5)

6.5 mA under

(PP5, PP=5)

BAR 9 -> 8 43%  42%

300mA under

LCD Backlight off

(Tx=12dBm)

300 mA under

LCD Backlight off

(Tx=Max)

BAR 15 -> 14 73%  72% BAR 3 -> 2 13%  12%

BAR 14 -> 13 68%  67% BAR 2 -> 1 8%  7%

BAR 13 -> 12 63%  62% BAR 1 -> 0 3%  2%

BAR 12 -> 11 58%  57% Low Battery Pop-up

BAR 11 -> 10 53%  52% Critical Low Battery Pop-up

BAR 10 -> 9 48%  47% POWER OFF Below 1%

LGE Internal Use Only

Soc

%

- 9 -

4% ~ 15% : One Time

popup (No call)

0% ~ 3% : Every Level

change popup

Soc

%

(No call)

Only for training and service purposes

2.5 SW Features

Item Feature Comment

RSSI 0 ~ 5 Levels

Battery Charging 0 ~ 20 Levels

Key Volume 0 ~ 7 Level

Audio Volume 0 ~ 7 Level

Time / Date Display Yes

2. PERFORMANCE

Multi-Language Yes

Quick Access Mode Dialing/ Contact /Message/Menu

PC Sync Yes

Speed Dial Yes

Profile Yes not same with feature phone setting

CLIP / CLIR Yes

Name / Number / Email /

Phone Book

Last Dial Number Yes

addresses/Organizations/Groups/

Website/Postal

Birthday / Ringtone

English/French/German/Spanish/Italia

n/Danish/Dutch/Korean

The user can edit as desired icon.

(Menu icon excluded)

Icon on the menu is the LONG-PRESS.

DRAG icon to where you want to

register.

There is no limitation on the number

of items.

It depends on

available memory amount.

Ringtone can be specified in the detail

view screen.

Last Dial Numbers, Last Received

Numbers and Last Missed Numbers

can store up to a total of 500.

Last Received

Number

Last Missed Number Yes

Search by Number

/ Name

Group Yes

LGE Internal Use Only

Last Dial Numbers, Last Received

Yes

Name

- 10 -

Numbers and Last Missed Numbers

can store up to a total of 500.

Last Dial Numbers, Last Received

Numbers and Last Missed Numbers

can store up to a total of 500.

There is no limitation on the number

of items. It depends on

available memory amount.

Only for training and service purposes

Fixed Dial Number Yes

Service Dial Number No

Read only

Own Number Yes

(add/edit/delete are not

supported)

Voice Memo Yes

Call Reminder No

Network Selection Automatic

Mute Yes

Call Divert Yes

Call Barring Yes

2. PERFORMANCE

Call Charge (AoC) Yes

Call Duration Yes

There is no limitation on the

SMS (EMS)

number of items. It depends on

available memory

EMS does not support.

amount.

SMS Over GPRS No

EMS Melody / Picture No

Send / Receive / Save No

MMS MPEG4

Send / Receive / Save

Yes

Long Message MAX 2000 characters

Cell Broadcast Yes

Download Over the Web

Game No

Calendar Yes

Memo No

World Clock No

Unit Convert No

Stop Watch No

Wall Paper Yes

LGE Internal Use Only

- 11 -

Only for training and service purposes

WAP Browser No

GPRS

Yes

Class 12

Hold / Retrieve

Yes

2. PERFORMANCE

Support only web browser based on

webkit. WAP stack and wml are not

supported.

Download Melody /

Wallpaper

Yes Over web browser

SIM Lock Yes Operator Dependent

SIM Toolkit Class 1, 2, 3, C

MMS Yes Google MMS Client

EONS Yes

CPHS Yes V4.2

ENS No

Camera Yes

3M FF /

Digital Zoom : x4

JAVA No

Voice Dial No

IrDa No

Bluetooth Yes Ver. 3.0

FM radio Yes

EDGE Yes Class 12

Conference Call Yes Max. 6

DTMF Yes

Memo pad No

TTY No

AMR Yes

SyncML Yes

IM No

Email Yes

LGE Internal Use Only

- 12 -

Only for training and service purposes

2.6 HW SPEC.

1) GSM transceiver specification

GSM :

2.6 HW SPEC.

1) GSM transceiver specication

Item Specification

Phase Error

2. PERFORMANCE

Rms : 5°

Peak : 20 °

Frequency Error

EMC(Radiated Spurious Emission

Disturbance)

Transmitter Output power and Burst

Timing

Burst Timing <3.69us

Spectrum due to modulation out to

less than 1800kHz offset

Spectrum due to modulation out to

larger than 1800kHz offset to the

edge of the transmit band

GSM : 0.1 ppm

DCS/PCS : 0.1 ppm

GSM/DCS : < -28dBm

GSM : 5dBm – 33dBm ± 3dB

DCS/PCS : 0dBm – 30dBm ± 3dB

200kHz : -36dBm

600kHz : -51dBm/-56dBm

1800-3000kHz :< -63dBc(-46dBm)

3000kHz-6000kHz : <-65dBc(-46dBm)

6000kHz < : < -71dBc(-46dBm)

DCS :

1800-3000kHz :< -65dBc(-51dBm)

6000kHz < : < -73dBc(-51dBm)

400kHz : -19dBm/-22dBm(5/0), -23dBm

Spectrum due to switching transient

Reference Sensitivity – TCH/FS Class II(RBER) : -105dBm(2.439%)

Usable receiver input level range 0.012(-15 - -40dBm)

Intermodulation rejection – Speech

channels

AM Suppression

- GSM : -31dBm

- DCS : -29dBm

Timing Advance ± 0.5T

LGE Internal Use Only

600kHz : -21dBm/-24dBm(5/0), -26dBm

± 800kHz, ± 1600kHz

: -98dBm/-96dBm (2.439%)

-98dBm/-96dBm (2.439%)

- 13 -

Only for training and service purposes

2) WCDMA transmitter specication

2) WCDMA transmitter specification

Error Vector Magnitude

< 17.5 %, when Pout ≥ -20 dBm

Item Specification

Transmit Frequency

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

Frequency Error within ±0.1 PPM

Open Loop Power Control

Minimum Transmit Power < -50 dBm /3.84 MHz

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

Band1 : 1920 MHz ~ 1980 MHz

WCDMA(FDD1) TX : 1920 – 1980 MHz

WCDMA(FDD8) TX : 880 - 915 MHz

Band8 : 880 ~ 915 MHz

Normal Conditions : within ±9 dB,

Extreme Conditions : within ±12 dB

2. PERFORMANCE

Adjacent Channel Leakage

Power Ratio (ACLR)

Spurious Emissions

|f-fc| > 12.5 MHz

> 33 dB @ ±5 MHz,

> 43 dB @ ±10 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

< -60 dBm / 3.84 MHz RW @ 1930 MHz ≤ f ≤ 1900 MHz

< -60 dBm / 3.84 MHz RW @ 2110 MHz ≤ f ≤ 2155 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

Transmit Intermodulation

Peak Code Domain Error

LGE Internal Use Only

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

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

when Interference CW Signal Level = -40 dBc

< -15 dB at Pout ≥ -20 dBm

- 14 -

Only for training and service purposes

3) WCDMA receiver specication

3) WCDMA receiver specification

Item Specification

Receive Frequency

Reference Sensitivity Level

Maximum Input Level BER < 0.001 when Îor = -25 dBm / 3.84 MHz

Adjacent Channel Selectivity

(ACS)

2. PERFORMANCE

Band1 : 2110 ~ 2170 MHz

WCDMA(FDD1) RX : 2110 – 2170 MHz

Band8 : 925~960MHz

WCDMA(FDD8) RX : 925 – 960 MHz

Band1 : BER < 0.001 when Îor = -106.7 dBm / 3.84 MHz

Band5 : BER < 0.001 when Îor = -103.7 dBm / 3.84 MHz

ACS > 33 dB where BER < 0.001 when

Îor = -92.7 dBm / 3.84 MHz

& Ioac = –52 dBm / 3.84 MHz @ ±5 MHz

Blocking Characteristic

Spurious Response

Intermodulation

Spurious Emissions

Inner Loop Power Control

BER < 0.001 when Îor = -103.7 dBm / 3.84 MHz

& Iblocking = -56 dBm / 3.84 MHz @ Fuw(offset) = ±10 MHz

or Iblocking = -44 dBm / 3.84 MHz @ Fuw(offset) = ±15 MHz

BER < 0.001 when Îor = -103.7 dBm / 3.84 MHz

& Iblocking = -44 dBm

BER < 0.001 when Îor= -103.7 dBm / 3.84 MHz

& Iouw1 = -46 dBm @ Fuw1(offset) = ±10 MHz

& Iouw2 = -46 dBm / 3.84 MHz @ Fuw2(offset) = ±20 MHz

< -57 dBm / 100 kHz BW @ 9 kHz ≤ f < 1 GHz

< -47 dBm / 1 MHz BW @ 1 GHz ≤ f ≤ 12.75 GHz

Adjust output(TPC command)

cmd 1dB 2dB 3dB

+1 +0.5/1.5 +1/3 +1.5/4

0 -0.5/+0.5 -0.5/+0.5 -0.5/+0.5

-1 -0.5/-1.5 -1/-3 -1.5/-4

In Uplink

LGE Internal Use Only

group(10equal command group)

+1 +8/+12 +16/+24

- 15 -

Only for training and service purposes

4) HSDPA transmitter specication

4) HSDPA transmitter specification

△

Item Specification

Transmit Frequency

Band1 : 1920 ~ 1980 MHz

WCDMA(FDD1) TX : 1920 – 1980 MHz

WCDMA(FDD8) TX : 880 - 915 MHz

Band8 : 880MHz ~ 915MHz

Sub-Test

2. PERFORMANCE

Maximum Output Power

HS-DPCCH

Spectrum Emission Mask

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

Sub-

test in

table

C.10.1.4

5

Power

step

1

Power step

slot boundary

Start of

Ack/Nack

2 Start of CQI 1 +/- 0.6

Power

step

size, P

Transmitter power step tolerance [dB]

[dB]

6 +/- 2.3

3 Middle of CQI 0 +/- 0.6

4 End of CQI 5 +/- 2.3

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

Frequency offset

from carrier

f

Minimum 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

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

Adjacent Channel Leakage

> 33 dB @ ±5 MHz

Power Ratio (ACLR)

> 43 dB @ ±10 MHz

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

LGE Internal Use Only

- 16 -

Only for training and service purposes

5) HSDPA receiver specication

5) HSDPA receiver specification

Item Specification

2. PERFORMANCE

Receive Frequency

Maximum Input Level

(BLER or R), 16QAM Only

6) WLAN 802.11b transceiver specication

6) WLAN 802.11b transceiver specification

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

Tx Power Level ≤ 20dBm under

Frequency Tolerance within ±25 PPM

Chip clock Frequency

Spectrum Mask

Item Specification

Tolerance

Band1 : 2110 ~ 2170 MHz

WCDMA(FDD1) RX : 2110 – 2170 MHz

WCDMA(FDD8) RX : 925 – 960 MHz

Band8 : 925 MHz ~ 960 MHz

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

within ±25 PPM

≤ -30 @ fc-22MHz< f <fc-11MHz and fc+11MHz< f <fc+22MHz

≤ -50 @ f < fc-22MHz and f > fc+22MHz

Power ramp on/off time ≤ 2us

Carrier Suppression ≤ -15dB

Modulation Accuracy

≤ 35%

(Peak EVM)

< -36 dBm @ 30MHz ~ 1GHz

< -30 dBm above @ 1GHz ~ 12.75GHz

Spurious Emissions

< -47 dBm @ 1.8GHz ~ 1.9GHz

< -47 dBm @ 5.15GHz ~ 5.3GHz

Rx Min input Sensitivity ≤ -85dBm(1Mbps,2Mbps,5.5Mbps,11Mbps) @ FER ≤ 8%

Rx Max input Sensitivity ≥ -10dBm(1Mbps,2Mbps,5.5Mbps,11Mbps) @ FER ≤ 8%

Rx Adjacent Channel

Rejection

interference input signal -70dBm@fc±25MHz(11Mbps)

≥ 35dB @FER ≤ 8%,

LGE Internal Use Only

- 17 -

Only for training and service purposes

7) WLAN 802.11g transceiver specification

7) WLAN 802.11g transceiver specication

Item Specification

2. PERFORMANCE

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

Tx Power Level ≤ 20dBm

Frequency Tolerance within ±25 PPM

Chip clock Frequency

Tolerance

Spectrum Mask

Transmitter constellation error

(rms EVM)

Spurious Emissions

within ±25 PPM

≤ -20 @ ±11MHz offset (9Mhz ~ 11MHz)

≤ -28 @ ±20MHz offset (11MHz ~ 20Mhz)

≤ -40 @ ±30MHz offset (20MHz ~ 30Mhz)

≤ -5dB

< -36 dBm @ 30MHz ~ 1GHz

< -30 dBm above @ 1GHz ~ 12.75GHz

< -47 dBm @ 1.8GHz ~ 1.9GHz

< -47 dBm @ 5.15GHz ~ 5.3GHz

PER ≤ 10%

-82dBm@6Mbps, -81dBm@9Mbps, -79dBm@12Mbps

Rx Min input Sensitivity

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

Rx Adjacent Channel

Rejection

-77dBm@18Mbps, -74dBm@24Mbps, -70dBm@36Mbps

-66dBm@48Mbps, -65dBm@54Mbps

PER ≤ 10%,

ACR ≥ 16dB@6Mbps, ACR ≥ 15dB@9Mbps,

ACR ≥ 13dB@12Mbps, ACR ≥ 11dB@18Mbps,

ACR ≥ 8dB@24Mbps, ACR ≥ 4dB@36Mbps

ACR ≥ 0dB@48Mbps, ACR ≥ -1dB@54Mbps

※ACR shall be measured by setting the desired signal's strength 3

dB above the rate-dependent

sensitivity specified in min input sensitivity

LGE Internal Use Only

- 18 -

Only for training and service purposes

8) WLAN 802.11n transceiver specification

8) WLAN 802.11n transceiver specication

Item Specification

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

2. PERFORMANCE

Tx Power Level ≤ 20dBm

Frequency Tolerance within ±25 PPM

Chip clock Frequency

Tolerance

Spectrum Mask

Transmitter constellation error

(rms EVM)

Spurious Emissions

Rx Min input Sensitivity

within ±25 PPM

≤ -20 @ ±11MHz offset (9Mhz ~ 11MHz)

≤ -28 @ ±20MHz offset (11MHz ~ 20Mhz)

≤ -45 @ ±30MHz offset (20MHz ~ 30Mhz)

≤ -5dB

< -36 dBm @ 30MHz ~ 1GHz

< -30 dBm above @ 1GHz ~ 12.75GHz

< -47 dBm @ 1.8GHz ~ 1.9GHz

< -47 dBm @ 5.15GHz ~ 5.3GHz

PER ≤ 10%

82dBm@6.5Mbps, -79dBm@13Mbps, -77dBm@19.5Mbps

-74dBm@26Mbps, -70dBm@39Mbps, -66dBm@52Mbps

-65dBm@58.5Mbps, -64dBm@65Mbps

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

PER ≤ 10%,

ACR ≥ 16dB@6.5Mbps, ACR ≥ 13dB@13Mbps,

ACR ≥ 11dB@19.5Mbps, ACR ≥ 8dB@26Mbps,

Rx Adjacent Channel

Rejection

※ACR shall be measured by setting the desired signal's strength 3

LGE Internal Use Only

ACR ≥ 4dB@39Mbps, ACR ≥ 0dB@52Mbps

ACR ≥ -1dB@58.5Mbps, ACR ≥ -2dB@65Mbps

dB above the rate-dependent

sensitivity specified in min input sensitivity

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Only for training and service purposes

9) GPS receiver specification

9) GPS receiver specication

Item Specification

Receive Frequency 1574.42 MHz ~ 1576.42 MHz

2. PERFORMANCE

Minimum Sensitivity

1 satellite ≥-142dBm, 7 satellites ≥ -147dBm at coarse time

aiding

LGE Internal Use Only

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Only for training and service purposes

3. CIC AND SERVICE CENTER

3.1 CIC FAQ

No FAQ Q&A

1 Q I can’t remember the PhoneLock password.

Unlock the Pattern up to 5 times / In 30 seconds of a Pin code failure, a pop-up msg requesting retry is displayed. To make an emergency call, click the ‘Emergency Call’ button on the Keypad menu.To unlock Pattern and Pin Code, visit a service center.

1. How to unlock Pattern Lock, pw and Pin

A

-> HW Factory Reset key combination

2. Check out if it is mentioned in the User Manual.

-> It will be included in the manual.

3.Description on HW Factory Reset key combination & method

-> Power OFF, Power key + Volume dw key + Home key -> Factory Reset.

3. CIC AND SERVICE CENTER

Development requests

2. Request to check out if it is specied in the user manual.

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

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

To write a le on the SD Card, connect the USB cable. First, install a USB Driver for your phone model on your PC.

1. Connect the USB cable to the phone, and a pop-up will appear on the phone. Select

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

A

‘Media File Transmission’ in the pop-up. Then, a movable disk window is open on the PC. In the window, you can open a folder to move. On the PC, select a le to move and copy it into the movable disk window.

2. To move it to PC, follow #1. Select a le in the movable disk window and copy it into PC.

Development requests

1.PC<-> SD CARD

2.PHONE<-> SD CARD

LGE Internal Use Only

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Only for training and service purposes

No FAQ Q&A

3 Q I use it abroad, but 3G connection doesn’t work.

Setting ->Mobile data -> Check if Mobile data is ON.

A

When registered on a 3G network manually, you may not connect to the network in other areas. Then, select the automatic setting.(Select ‘Automatically’.)

3. CIC AND SERVICE CENTER

Development requests

ex) 1. Europe<->Europe

2. Europe<->Continents(North America, Asia etc)

4 Q The GPS location isn’t right, what should I do?

GPS signals are so weak that location may not be found due to weather conditions or other surrounding factors(indoors, radio wave reections). Setting->Location & Security settings -> Use Wireless Network is ticked, location info

A

can be brought from a nearby base station. This may not get correct location info due to a wider margin of error than GPS-based location info. Tick ‘Use GPS Satellites’ and stay outdoors to get the GPS-based location info, which will reduce the margin of error.

5 Q The downloaded application isn’t compatible?

Make sure the phone’s Android OS is compatible with the app.

A

Setting -> Phone info -> SW info -> Check ‘Android ver.’ and install a compatible app.

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

Sign up and create an email account on a service provider’s home(e.g. http://www.

A

gmail.com, http://www.yahoo.com, http://www.hotmail.com).

LGE Internal Use Only

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Only for training and service purposes

No FAQ Q&A

7 Q E-mail registration doesn’t work.

1. Email service uses data. Make sure WiFi or Data is available.

2. Check out email address and password.

A

3. Check out your email account setting info(IMAP, POP3, SMTP).

4. Inquire your service provider(administrator) about the server info relevant to EAS, if applicable.

3. CIC AND SERVICE CENTER

8 Q

Unused application shows up as a using program even though it is all killed. What should I do?

Android is characterized by some apps re-running even though the user ends them. This is due to the cache set for performance speed before the user runs them, or the background service.

A

That is because the service is running in the background of the app. For example, phone or email apps need notify the user of incoming emails or calls even when they are killed.

9 Q Wi connection doesn’t work well.

WiFi connection glitches result from many causes. Try the following for connection.

1. Make sure WiFi is ON.

2. Make sure the phone is connected with an AP.

1) APs of open security type require no pw but automatic connection. Still, unless the

A

phone has been authorized by a certain AP, it cannot use WiFi.

Connect another AP.

3. Simply, AP info does not match the info saved on the phone.

1) Make sure the AP info entered on the phone, e.g. security type and password is correct.

LGE Internal Use Only

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Only for training and service purposes

No FAQ Q&A

10 Q How do you install the PC Sync Program?

http://www.lg.com -> Select a country -> Support-> Mobile Phone Support -> Select a

A

model -> Select and download ‘PC Suite Program.’

11 Q How do you install the Phone driver?

http://www.lgmobile.co.kr -> Download center -> Search the model -> Download SW.

A

Or, install the PC Suite Program and it will be installed as well.

3. CIC AND SERVICE CENTER

12 Q How to connect internet/data network

Setting > Mobile data > Make sure ‘Mobile Data’ is ON.

A

When it is OFF, turn it ON.

13 Q

What should I do to connect PC Sync program with the phone?

Connect the USB Cable. On the phone, select as the connection mode ‘LG Software’ >

A

Run ‘PC Suite,’ and connection is made automatically. If not, go to PC Suite main screen and select Connect Phone > USB Cable Connection.

14 Q Can language be changed?

A Setting - Language & Input - ‘Language’ for language setting change.

15 Q How do you Reset and Factory Reset?

A Setting - Backup & Reset - ‘Reset’.

LGE Internal Use Only

- 24 -

Only for training and service purposes

No FAQ Q&A

16 Q I want to change the bell sound.

A Setting - Sound - Sound Setting to change the ringtone for SIM1 and SIM2, respectively.

17 Q Is it compatible with other devices?

A Bluetooth connection is available with devices supporting Bluetooth.

3. CIC AND SERVICE CENTER

Development requests

ex) 1. Bluetooth

2. other

18 Q How do you use HDMI?

A This device does not support HDMI features.

19 Q HDMI error occurs.

A This device does not support HDMI features.

20 Q How do you use Smart Share?

A This terminal does not support Wi-Direct features.

21 Q Smart Share error occurs.

A This terminal does not support Wi-Direct features.

LGE Internal Use Only

- 25 -

Only for training and service purposes

No FAQ Q&A

22 Q Battery consumption is too fast.

1. Where few antenna bars are displayed (radio shadow area), the phone is considered to be located far from the network. To send/receive the phone’s location info registered, more power is required , which consumes battery power faster.

2. When the LCD Back Light is on, it consumes electric currents and thus battery power. For example, when the LCD Back Light uses 100-mA/h currents, a 1500-mA battery will turn on the LCD for 15 hours. Longer screen time-out setting uses up battery power faster. Shorter screen time-out setting is recommended.

3. Even when you nish some apps and press the Home key, the apps remain running in the background, consuming the battery power. Use the Delete/Previous key to end apps or programs.

A

4. Rooting means having a Super User Authority over the Android system domain, which may change data in the battery control domain, accelerating battery power consumption.

3. CIC AND SERVICE CENTER

5. Some apps requiring regular data updates, e.g. Dodolphone, NateOn, Kakaotalk, stocks/weather widgets, may accelerate battery power consumption, especially when their data update cycle is short.

6. To install multiple apps at a time, reboot the phone rst. Many widget apps installed on the screen may accelerate battery power consumption.

7. Add-on features need be turned o, when not in use, to reduce battery consumption. (BT/Wi/GPS)

23 Q

How is the distribution schedule of OS or SW new version known?

A Go to Setting -> Phone Info -> ‘Software Update’ or visit LG Mobile’s home page.

LGE Internal Use Only

- 26 -

Only for training and service purposes

No FAQ Q&A

24 Q How do you update the SW?

End Users can update SW in 2 ways.(Web Download / FOTA)

- Web Download : Connect the phone with PC, use the SW Update Tool and download a new binary from the server via the internet to PC. Then, install it on the phone.

A

- FOTA : Without PC, via the phone network(3G, 4G WIFI ), download FOTA Package on the phone for automatic Install & Update.

In either way, User Data is maintained.

3. CIC AND SERVICE CENTER

25 Q

Until when is it guaranteed after purchase? What is the warranty limit?

Free warranty period is a year as from the date of purchase. Glitches due to external

A

shocks may incur charges for xing even within the free warranty period.

26 Q What kinds of phone accessories are there?

As In-Box items, Headset (Stereo), TA and Data cable are supported.

A

Visit a service center to purchase additional accessories. (It depends on options.)

LGE Internal Use Only

- 27 -

Only for training and service purposes

3. CIC AND SERVICE CENTER

No FAQ Q&A

I’d like to request for mor than 3 of expecting question and answer for any new function or features in the new arrival.

As the antenna pattern part xed on the rear case is not coated, be careful not to damage the pattern during service work.

27

28

IO Conn. may not be inserted horizontally well enough. Give a guide to insert it by lifting the hand or the cable slightly.

29 GPS is turned on as default. Turn o GPS, which will help reduce battery consumption.

LGE Internal Use Only

- 28 -

Only for training and service purposes

No FAQ Q&A

Safe Mode Method

0101

30 Q What should I do to enter the Safe Mode?

Safe Mode Method

3. CIC AND SERVICE CENTER

A

Development requests

Press Power on

Key

How to enter the Safe Mode on each model need be described using screen captures.

Power Key

Long Press Volume

Down Key When

you have see

Carrier Logo of LCD

Display

Volume Down

31 Q What is the Memory Size provided for and seen to the end user?

Storage

Safe Mode

you can see Safe Mode ,after Phone

Power On

Development requests

LGE Internal Use Only

1) Default available memory capacity on the phone is marked in the image attached.

2) Actual memory size available to customers need be marked.

Total space

App

Photo, video

Audio(Music, Ringtones,podcast, etc.)

Download

Others

Available

SD Card

- 29 -

Only for training and service purposes

4. TROUBLE SHOOTING

4.1 RF Component

X2000

VCTCXO

FL1004

W2100 Tx SAW

RF Transceiver

FL1003

W2100 Rx SAW

U1000

FL1001

EGSM/850 Rx SAW

FL1002

DCS/PCS Rx SAW

FL1006 W2100

DPX

U1002

FL1007

W2100

W900 DPX

PAM

4. TROUBLE SHOOTING

U1001

GSM PAM

+ASM

U1003

W900

PAM

SW100

Mobile Switch

LGE Internal Use Only

- 30 -

Only for training and service purposes

LG E425 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual