LG LG-E400f User manual

Internal Use Only
Service Manual
LG-E400f
Date: March, 2012 / Issue 1.0

- 2 - Copyright © 2012 LG Electronics. Inc. All right reserved.
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
2. PERFORMANCE...................................................................... 5
2.1 Product Name............................................................................................5
2.2 Supporting Standard..............................................................................5
2.3 Main Parts : GSM Solution.....................................................................6
2.4 HW Features ...............................................................................................6
2.5 SW Features................................................................................................9
2.6 HW SPEC. ................................................................................................. 13
3. CIC_FAQ................................................................................ 20
3.1 FAQ Inquiry List...................................................................................... 20
4. TROUBLE SHOOTING .......................................................... 33
4.1 RF Component.......................................................................................33
4.2 SIGNAL PATH...........................................................................................35
4.3 Checking TCXO Block........................................................................... 38
4.4 Checking GSM TX Module(GSM PAM + ASM) Block ............... 41
4.5 Checking WCDMA Block .................................................................... 44
4.6 Checking GSM Block............................................................................ 55
4.7 GPS/WIFI/BT RF Component ............................................................ 63
4.8 GPS/WIFI/BT SIGNAL PATH ................................................................ 65
4.9 GPS/WIFI/BT Trouble shooting ........................................................ 67
4.10 Power ONTrouble Shooting........................................................... 74
4.11 Charging Trouble Shooting............................................................ 78
4.12 3MFF CameraTrouble Shooting................................................... 81
4.13 Main LCD trouble................................................................................ 84
4.14 Proximity Sensor on/off Trouble Shooting............................... 86
4.15 Motion Sensor on/offTrouble Shooting................................... 88
4.16 Compass Sensor on/off Trouble Shooting ............................... 90
4.17 DC Motor Trouble Shooting...........................................................93
4.18 Audio Troble.......................................................................................... 95
5. DOWNLOAD.......................................................................105
6.Block diagram ....................................................................125
7. CIRCUIT DIAGRAM ............................................................132
8. BGA PIN MAP .....................................................................141
9. PCB LAYOUT.......................................................................147
10. CALIBRATION...................................................................149
11. HIDDEN MENU.................................................................169
12. EXPLODED VIEW & REPLACEMENT PART LIST .............175
12.1 EXPLODED VIEW................................................................................175
12.2 Replacement Parts...........................................................................176
12.3 Accessory.............................................................................................201

- 3 - Copyright © 2012 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
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.
1. INTRODUCTION

- 4 - Copyright © 2012 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
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.

2. PERFORMANCE
- 5 - Copyright © 2012 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
2. PERFORMANCE
2.1 Product Name
E400 : WCDMA900/2100+EGSM/GSM850/DCS/PCS
(HSDPA 3.6Mbps GPRS Class 12 / EDGE Class 12)
2.2 Supporting Standard
Item Feature Comment
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
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
E400ff : WCDMA850/2100+EGSM/GSM850/DCS/PCS
WCDMA(FDD1,5)/EGSM/GSM850/DCS1800/PCS1900
WCDMA(FDD5) TX : 824~849 MHz
WCDMA(FDD5) RX : 869~894 MHz

2. PERFORMANCE
- 6 - Copyright © 2012 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
2.3 Main Parts : GSM Solution
Item Part Name Comment
Digital Baseband MSM7225A: Qualcomm
Analog Baseband PM8029 : Qualcomm
RF Chip RTR6285A : Qualcomm
2.4 HW Features
Item Feature Comment
Form Factor DOP type
Battery
1) Capacity
Standard : Li-Ion , 1500mAh
2) Packing Type : Soft Pack
Size Standard :
102.6 x 61.6 x 11.85 mm
Weight 119g With Battery
Volume 74.89cc
PCB Staggered 8 Layers , 0.8t
Stand by time 2G Up to 600 hrs
3G Up to 600 hrs
@ Paging Period 5 (2G)
@ DRX 7 (3G)
Charging time 3 hrs @ Power Off / 1500mAh
Talk time 2G Up to 750mins
3G Up to 600mins
@ Power Level 13 (2G)
@ Tx = 0dBm (3G)
RX sensitivity
WCDMA(FDD1) : -106.7 dBm
WCDMA(FDD8) : -104.7 dBm
EGSM : -105 dBm
GSM850 : -105 dBm
DCS 1800 : -105 dBm
PCS 1900 : -105 dBm
3G Up to 500 hrs
WCDMA(FDD5) : -104.7 dBm

2. PERFORMANCE
- 7 - Copyright © 2012 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
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
Class3(WCDMA)
Class4 (EGSM)
Class4 (GSM850)
Class1 (PCS)
Class1 (DCS)
EDGE
GSM 900 : 27 dBm
DCS 1800 : 26 dBm
PCS 1900 : 26 dBm
E2 (GSM900)
E2 (PCS)
E2 (DCS)
GPRS compatibility GPRS Class 12
EDGE compatibility EDGE Class 12
SIM card type Plug-In SIM
3V /1.8V
Display Main LCD
TFT Main LCD(3.2’, 240 x 320)
Built-in Camera 3M FF CMOS Camera
Status Indicator No
Keypad
Function key : 1
Side Key : 2
Power key : 1
Function Key:
Home, Back, Menu,
Side Key :
Volume up/down
ANT Main : Internal Fixed Type LDS type
System connector 5 Pin
Ear Phone Jack 3.5Phi, 4 Pole, Stereo
PC synchronization Yes
Memory eMMC : 2GByte
DRAM :3Gbit
Speech coding FR, EFR, HR,AMR
Data & Fax Built in Data & Fax support

2. PERFORMANCE
- 8 - Copyright © 2012 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Vibrator Built in Vibrator
Blue Tooth V3.0
MIDI(for Buzzer Function) SW Decoded 72Poly
Music Player MP3/ WMA/AAC/HE-AAC/EAAC+
Video Player MPEG4, H.263, H.264
Camcorder MPEG4, H.263, H.264
Voice Recording Yes
Speaker Phone mode
Support Yes
Travel Adapter Yes
CDROM No
Stereo Headset Yes Not inbox
Data Cable Yes
T-Flash
(External Memory)
Yes Not inbox
optional
optional

2. PERFORMANCE
- 9 - Copyright © 2012 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
2.5 SW Features
Item Feature Comment
RSSI 0 ~ 4 Levels
Battery Charging 0 ~ 20 Levels
Key Volume 0 ~ 7 Level
Audio Volume 0 ~ 7 Level
Time / Date Display Yes
Multi-Language Yes English/French/German/Spanish/Italia
n/Danish/Dutch/Korean
Quick Access Mode Dialing/ Contact / Menu / Message
PC Sync Yes
Speed Dial Yes
Profile Yes not same with feature phone setting
CLIP / CLIR Yes
Phone Book
Name / Number / Email /
Website/Postal
addresses/Organizations/Groups/
Birthday / Ringtone
There is no limitation on the number
of items.
It depends on
available memory amount.
Last Dial Number Yes
Last Dial Numbers, Last Received
Numbers and Last Missed Numbers
can store up to a total of 500.
Last Received
Number Yes
Last Dial Numbers, Last Received
Numbers and Last Missed Numbers
can store up to a total of 500.
Last Missed Number Yes
Last Dial Numbers, Last Received
Numbers and Last Missed Numbers
can store up to a total of 500.

2. PERFORMANCE
- 10 - Copyright © 2012 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Search by Number
/ Name Name
Group Yes
There is no limitation on the number
of items. It depends on
available memory amount.
Fixed Dial Number Yes
Service Dial Number No
Own Number Yes
Read only
(add/edit/delete are not
supported)
Voice Memo Yes
Call Reminder No
Network Selection Automatic
Mute Yes
Call Divert Yes
Call Barring Yes
Call Charge (AoC) Yes
Call Duration Yes
SMS (EMS)
There is no limitation on the
number of items. It depends on
available memory
amount.
EMS does not support.
SMS Over GPRS No
EMS Melody / Picture No
Send / Receive / Save No
MMS MPEG4
Send / Receive / Save Yes
Long Message MAX 2000 characters