LG MG220 User manual

Date: May, 2006 / Issue 1.0
Service Manual
MG220
Service Manual Model : MG220
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The information in this manual is subject to change without notice and should not be construed as a
commitment by LGE Inc. Furthermore, LGE Inc. reserves the right, without notice, to make changes to
equipment design as advances in engineering and manufacturing methods warrant.
This manual provides the information necessary to install, program, operate and maintain the MG220.
REVISED HISTORY
DATE ISSUE CONTENTS OF CHANGES S/W VERSION
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1. Introduction ..................................... 5
1.1 Purpose................................................... 5
1.2 Regulatory Information............................ 5
1.3 Abbreviations .......................................... 7
2. General Performance...................... 9
2.1 Product Name ......................................... 9
2.2 Supporting Standard ............................... 9
2.3 Main Parts: GSM Solution........................9
2.4 H/W Features.........................................10
2.5 S/W Features .........................................12
3. H/W Circuit Description................ 14
3.1 RF Transceiver General Description..... 14
3.2 Receiver Part ........................................ 14
3.3 Transmitter Part .................................... 17
3.4 Digital Baseband (DBB) Processor........20
3.5 Analog Baseband (ABB) Processor...... 25
4. TROUBLE SHOOTING .................. 45
4.1 Main Components Placement............... 45
4.2 FPCB Components Placement ............. 46
4.3 Baseband Components ........................ 46
4.4 Main Components (Description) ........... 47
4.5 Power On Trouble................................. 48
4.6 Charging Trouble .................................. 49
4.7 LCD Display Trouble............................. 51
4.8 Camera Trouble .................................... 53
4.9 Receiver Trouble................................... 55
4.10 Microphone Trouble ............................ 59
4.11 Vibrator Trouble .................................. 62
4.12 Keypad Backlight Trouble ................... 64
4.13 Folder ON/OFF Trouble ...................... 66
4.14 SIM Detect Trouble ............................. 68
4.15 Earphone Trouble ............................... 70
4.16 RF Rx pass Trouble Shooting..............74
4.17 RF Tx pass Trouble Shooting ..............81
5. DOWNLOAD .................................. 89
5.1 Download Setup.................................... 89
5.2 Download Procedure ............................ 90
6. SERVICE AND CALIBRATION...... 97
6.1 Service S/W ...........................................97
7. CIRCUIT DIAGRAM ....................... 99
8. PCB LAYOUT............................... 107
9. ENGINEERING MODE.................... 109
10. STANDALONE TEST .................... 110
10.1 Setting Method ............................... 110
11. EXPLODED VIEW &
REPLACEMENT PART LIST...... 111
11.1 EXPLODED VIEW ............................ 111
11.2 Replacement Parts
<Mechanic component>.................... 113
<Main component> ........................... 116
11.3 Accessory ......................................... 127
Table of Contents
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1. Introduction
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1.1 Purpose
This manual provides the information necessary to repair, calibration, description and download the
features of the MG220
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 unauthorized 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 MG220 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 MG220 must be performed only by the LGE 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
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1. Introduction
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E. Notice of Radiated Emissions
The MG220 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 MG220 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.
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1. Introduction
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1.3 Abbreviations
For the purposes of this manual, following abbreviations apply:
VRAMP Automatic Power Control
BB Base Band
BER Bit Error Ratio
CC-CV Constant Current - Constant Voltage
DAC Digital to Analog Converter
DCS Digital Communication System
dBm dB relative to 1 milli watt
DSP Digital Signal Processing
EEPROM Electrical Erasable Programmable Read-Only Memory
EL Electroluminescence
ESD Electrostatic Discharge
FPCB Flexible Printed Circuit Board
GMSK Gaussian Minimum Shift Keying
GPIB General Purpose Interface Bus
GSM Global System for Mobile Communications
IPUI International Portable User Identity
IF Intermediate Frequency
LCD Liquid Crystal Display
LDO Low Drop Output
LED Light Emitting Diode
OPLL Offset Phase Locked Loop
PAM Power Amplifier Module
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1. Introduction
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PCB Printed Circuit Board
PGA Programmable Gain Amplifier
PLL Phase Locked Loop
PSTN Public Switched Telephone Network
RF Radio Frequency
RLR Receiving Loudness Rating
RMS Root Mean Square
RTC Real Time Clock
FEM Front End Module
SIM Subscriber Identity Module
SLR Sending Loudness Rating
SRAM Static Random Access Memory
STMR Side Tone Masking Rating
TA Travel Adapter
TDD Time Division Duplex
TDMA Time Division Multiple Access
UART Universal Asynchronous Receiver/Transmitter
VCO Voltage Controlled Oscillator
VCTCXO Voltage Control Temperature Compensated Crystal Oscillator
WAP Wireless Application Protocol
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2. General Performance
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2.1 Product Name
MG220 : Support GPRS (Class 10)
2.2 Supporting Standard
2.3 Main Parts: GSM Solution
2. General Performance
Item Feature Comment
GSM850/ EGSM/ DCS/ PCS Tri-Band
Supporting Standard Phase 2+
SIM Toolkit : Class 1,2,3
GSM850 TX : 824 - 849 MHz
GSM850 RX : 869 - 894 MHz
EGSM TX : 880 - 915MHz
Frequency Range EGSM RX : 925 - 960MHz
DCS TX : 1710 - 1785 MHz
DCS RX : 1805 - 1880 MHz
PCS TX : 1850 - 1910 MHz
PCS RX : 1930 - 1990 MHz
WAP 2.0 : Yes
Application Standard MMS : Yes
JAVA : MIDP v2.0
MG220
Digital Baseband Calypso-AMR C035(D751992GHH))
Analog Baseband IOTA(TWL3025)
RF Chip Aero-2 (SI4210)
< MG220c >
EGSM/ DCS/ PCS
< MG220d >
GSM850/ DCS/ PCS
< MG220c >
EGSM/ DCS/ PCS
< MG220d >
GSM850/ DCS/ PCS
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