LG LG-E455 User manual

Internal Use Only
Service Manual
LG-E455
Date: April, 2013 / Issue 1.0

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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 Specications.............................................................................................5
2. PERFORMANCE...................................................................... 8
2.1 Product Name............................................................................................8
2.2 Supporting Standard..............................................................................8
2.3 Main Parts : GSM Solution.....................................................................8
2.4 HW Features ...............................................................................................9
2.5. HW SPEC .................................................................................................. 11
2.6 E455 Figures ............................................................................................ 23
3. CIC AND SERVICE CENTER .................................................. 24
3.1 CIC FAQ...................................................................................................... 24
4. TROUBLE SHOOTING .......................................................... 38
4.1 WCDMA Rx Part...................................................................................... 38
4.2 WCDMA Tx Part ...................................................................................... 62
4.3 GSM Rx Part ............................................................................................. 90
4.4 GSM Tx Part Troubleshooting.........................................................112
4.5. Power ......................................................................................................126
4.6 Charging .................................................................................................131
4.7. USB...........................................................................................................133
4.8. Audio.......................................................................................................134
4.9 6 AXIS Sensor........................................................................................148
4.10 Proximity Sensor...............................................................................151
4.11 Touch Sensor ......................................................................................153
4.12 Vibrator .................................................................................................155
4.13 Camera..................................................................................................157
4.14 LCD .........................................................................................................159
4.15 BT/Wi...................................................................................................162
4.16 GPS Part................................................................................................166
4.17 FM Radio...............................................................................................171
5. DOWNLOAD.......................................................................173
6. BLOCK DIAGRAM..............................................................200
7. CIRCUIT DIAGRAM ............................................................201
8. BGA PIN MAP .....................................................................209
9. PCB LAYOUT.......................................................................215
10. CALIBRATION...................................................................219
11. HIDDEN MENU.................................................................239
12. DISASSEMBLE GUIDE......................................................263
13. EXPLODED VIEW & REPLACEMENT PART LIST .............269
13.1 EXPLODED VIEW................................................................................269
13.2 Replacement Parts...........................................................................270
13.3 Accessory .............................................................................................301

- 3 - Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
1. INTRODUCTION
1. INTRODUCTION
- 4 -
This manual provides the information necessary to repair, calibration, description and download the features
of this model.
1. Introduction
1.1 Purpose
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.
1.2 Regulatory Information
A. Security
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 Limitation
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 Emission
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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Only for training and service purposes
LGE Internal Use Only
1. INTRODUCTION
- 5 -
ATTENTION
H. Electrostatic Sensitive Devices
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
A phone may interfere with sensitive laboratory equipment, medical equipment, etc. Interference from
unsuppressed engines or electric motors may cause problems.
G. Interference and Attenuation
F. Pictures
The pictures in this manual are for illustrative purposes only; your actual hardware may look slightly
different.

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Only for training and service purposes
LGE Internal Use Only
1. INTRODUCTION
- 6 -
KEY FEATURES
•HD streaming with Netflix on mobile and on TV (MHL)
•Android 4.0-Powered Smartphone (ice cream sandwich)
• 4” Touch Screen WVGA (480 X 800)
• 5MP AF with flash
• 3G Mobile Hotspot
• DivX® Capable
ENHANCED USER EXPERIENCE
•Android 4.1
• Proximity Sensor – locks the touch screen and buttons while talking on the phone
•Motion Sensor – Electronic compass , Accelerometer and Gyroscope
• USB Charging via Computer
• Airplane Mode (RF Off)
DESIGN
•Sleek and Stylish Design
• 4“ WVGA LCD Screen
•Capacitive Touch Screen – Glass with fast and accurate response
• Micro USB/Charging Port
1. Introduction
1.3 Specification
1.3 Specication

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Only for training and service purposes
LGE Internal Use Only
1. INTRODUCTION
- 7 -
1. Introduction
• 5MP AF with flashand Camcorder*
• Camera Resolutions: 2560 x 1920, 2048 x 1536, 2240 x 1344 1280 x 960 1280 X 768 Pixels
•Camera and Video Zoom: up to 4x
•Image Editor: zoom, rotate, crop images
• Brightness, ISO, White Balance,* Color Effects, Timer
•Cheese shutter – take photo with voice command.
• Video Resolutions: 640 x 480 320 x 240 176 x 144 Pixels
CAMERA/VIDEO
MULTIMEDIA
• DivX® Video Playback
• Video Player for H263,H264,MP4, DIVx
• Music Player for MP3, WMA, and Unprotected AAC
•Stereo Sound via Headset or Bluetooth
• Multitask While Playing Music in the Background
•Music Library – Organized by Artists, Albums, Songs, and Playlists
• Repeat and Shuffle Music Playback Modes
BLUETOOTH®
•Version: 3.0
• Supported Profiles: headset, hands-free, object push, advanced audio distribution (stereo), audio/video
remote control, file transfer, phone book access, message access, serial port
• Listen to Music with Optional Stereo Bluetooth Headset**
• Send User-Generated Pictures (JPEG) and Videos via Bluetooth Wireless Technology
*Depends on available memory.
**Accessories sold separately.

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Only for training and service purposes
LGE Internal Use Only
1. INTRODUCTION
- 8 -
VOICE/AUDIO
• One-Touch Speakerphone*
•Speaker-Independent Voice Commands
•Voice-Activated Dialing
•Text to Speech
• MP3 Music Ringer Support (clips from hit songs)†
TOOLS & DATA
•Android Apps: Alarm/Clock, Browser, Calculator, Calendar (Corporate or Google), Camera, Contacts,
Email, Gallery, Gmail, Google+, Maps, Messaging, Messenger, Music Player, Phone, Places, Play Books,
Play Movies, Play Music, Play Store, Talk, Video Player, Voice Recorder, Youtube
•Navigation – spoken turn-by-turn directions showing real-time traffic
•Wi-Fi Connectivity – IEEE 802.11 b/g/n
•A-GPS Support for Enhanced Location Accuracy
1. Introduction
SPECIFICATIONS
• Technology: GSM/WCMDA
• Frequencies: GSM 850,900,1800,1900
•WCDMA 2100, 850
• Data Transmission: WCMDA, GPRS
• Dimensions: 118.4 x 62.2 x 9.2(mm)
• Weight: 100g ( with Battery)
•Display: 4" , WVGA (480 x 800) pixels
• Standard Battery: 1,700 [mAh]
ACCESSORIES
•Standard Battery
• Travel Adapter and USB Cable*
•Stereo Headset
Technology : GSM/WCMDA
Frequencies : GSM 850,900,1800,1900
WCDMA 2100, 900
Data Transmission : WCMDA, GPRS
Dimensions : 118.4 x 62.2 x 9.2(mm)
Weight : 110g ( with Battery)
Display : 4”, WVGA (480 x 800) pixels
Standard Battery : 1,700 [mAh]

2. PERFORMANCE
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Only for training and service purposes
LGE Internal Use Only
2. PERFORMANCE
2.1 Product Name
LG-E455 : WCDMA 900//2100+GSM850/EGSM/DCS/PCS
(HSUPA 5.8Mbps(cat6)/HSDPA 21Mbps(cat14)/GPRS Class33/EDGE Class33)
2.2 Supporting Standard
LG-E455 Product SPEC
4
2.1 Product Name
LG-E455 : 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 MT6575 (MTK)
CP Chip MT6162 (MTK)
2.3 Main Parts : GSM Solution

2. PERFORMANCE
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Only for training and service purposes
LGE Internal Use Only
2.4 HW Features
LG-E455 Product SPEC
5
2.4 HW Features
List Type / Spec.
1. Phone Type DOP Type
2. Size 118.4* 62.2 *9.2 (mm)
3. Weight 110g
4. Battery 1,700mAh ( typ.), 1,650mAh(min) (Li-Ion)
5.Chipset MT6575,
6. Memory 4GB(EMMC) +4Gb(LPDDR2)
7. LCD
Size 4 inch
Dot 480(H) X 800(V)
Color 16.7M colors
Display Type Active matrix TFT, Transmissive Type
NTSC Typ. 70%
Contrast Ratio Typ. 1000:1
Pixel Pitch 0. 036mm X 0.108mm (235ppi)
Color temperature 5000 ~ 9000(K) ( typ. 6500K)
8. Main Camera
(8M)
Type CMOS image sensor
Resolution 2592(H) X 1944(V) pixels.
Frame Rate 30fps@QSXGA, 30fps@Full HD 1080P
60fps@HD 720P, 120fps@QVGA
View Angle 68°
Image Scaling Down 5M,3M,W3M,1M,W1M

2. PERFORMANCE
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Only for training and service purposes
LGE Internal Use Only
LG-E455 Product SPEC
6
Pixel x size 1.4um x1.4um
10. Audio
1) MIDI MIDI
2) Mono 18 X 10 X 3T Speaker
3) Receiver 12 X 07 X 2.7T Wideband Receiver
11. Bluetooth
Effective Distance 10M
Distance 0 m ~ 10 m (depend on
environment)
12. WLAN
standard IEEE 802.11 b/g/n
Throughput Max 40Mbps (SDIO Driver
performance)
depend on environment 0 ~ 50m (depend on environment)
13. GPS type A-GPS, GNSS