LG KE520 User manual
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1. Introduction ..................................... 5
2. Performance .................................... 6
2.1 Product Name ......................................... 6
2.2 Supporting Standard................................6
2.3 Main Parts : GSM Solution...................... 6
2.4 HW Feature..............................................7
2.5 Technical Specification ..........................12
3. Circuit Description........................ 17
3.1 General Description .............................. 17
3.2 RF Part.................................................. 17
3.3 Digital Baseband....................................24
3.4 Analog Baseband.................................. 32
3.5 WLAN + Bluetooth Module Interface .... 41
3.6 FM Radio Interface ................................45
4. TROUBLE SHOOTING .................. 47
4.1 RF Part Technical Brief......................... 47
4.2 RF Part Trouble shooting...................... 53
4.3 Bluetooth Trouble Shooting .................. 60
4.4 Baseband Part Troubleshooting ........... 65
4.5 LCD Display Trouble............................. 73
4.6 Camera Trouble Shooting..................... 79
4.7 Flash LED Trouble Shooting................. 85
4.8 SIM Detect Trouble Shooting................ 88
4.9 Slide Up/Down and Trouble Shooting... 91
4.10 Speaker/Receiver Trouble Shooting
(Common Path)................................... 93
4.11 Speaker/Receiver Trouble Shooting
(Acoustic Path).................................... 96
4.12 MIC Trouble Shooting ......................... 97
4.13 Ear-Mic Jack Detection
Trouble Shooting................................. 99
4.14 Ear-Mic Hook Detection
Trouble Shooting............................... 100
4.15 Ear-Mic Headset MIC Trouble
Shooting............................................ 101
4.16 Ear-Mic Headset HSOR/HSOL
Trouble Shooting................................102
4.17 FM-Radio Trouble Shooting...............105
4.18 Transflash Trouble Shooting..............106
4.19 Main Key Backlight LED Trouble
Shooting.............................................109
4.20 Slide Key Backlight LED Trouble
Shooting.............................................111
4.21 Vibrator Trouble Shooting..................113
4.22 Wi-Fi Trouble Shooting ......................115
5. Download..................................... 120
5.1 The purpose of downloading software 120
5.2 The Environment of Downloading
Software.............................................. 120
5.3 Download Procedure ...........................122
6. Block Diagram............................. 129
7. CIRCUIT DIAGRAM ..................... 141
8 BGA IC Pin Check .........................153
9. PCB LAYOUT............................... 157
10. RF Calibration ................................ 165
10.1 What’s the Rx Calibration?.............. 165
10.2 What’s the Tx Calibration? .............. 165
10.3 Calibration program - HOT_KIMCHI 166
11. Engineering Mode ......................171
12. EXPLODED VIEW &
REPLACEMENT PART LIST ..... 175
12.1 EXPLODED VIEW ............................ 175
12.2 Replacement Parts
<Mechanic component>.................... 177
<Main component> ........................... 180
12.3 Accessory ......................................... 196
Table of Contents
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
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1. Introduction
1.1 Purpose
This manual provides the information necessary to repair, calibration, description and download the features of the KE520.
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 you’re 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. LGE does not warrant that this product is immune
from the above case but will prevent unaut horized use of common-carrier telecommunication service of facilities accessed
through or connected to it. LGE 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 KE820/KG99 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 the KE520 must be performed only at the LGE or its authorized agents. The user may not make
any changes and/or repairs expect as specifically noted in this manual. Therefore, note that unautho rized alternations or
repair may affect the regulatory status of the system and may void any remaining warranty.
E. Notice of Radiated Emissions
The KE520 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
An KE520 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 contains 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 the se protective packages until these are used. When returning
system boards or parts such as EEPROM to the factory, use the protective package as described.
1. Introduction
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Z3X-BOX.COM
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
2. Performance
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2. Performance
2.1 Product Name
KE520 : GPRS Class 10 / EDGE Class 10
2.2 Supporting Standard
2.3 Main Parts : GSM Solution
Item Feature Comment
Supporting Standard EGSM/DCS1800/PCS1900
with seamless handover
Phase 2+(include AMR)
SIM Toolkit : Class 1,2,3,E
Frequency Range 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 WAP 2.0, JAVA 2.0, MMS1.2
Item Part Name Comment
Digital Baseband Neptune (D761811BZVL): TI
Analog Baseband Triton (TWL3029): TI
RF Chip B6PLD: RENESAS
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