LG MG210 User manual
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 MG210.
REVISED HISTORY
DATE ISSUE CONTENTS OF CHANGES S/W VERSION
3/Mar/2006 ISSUE 0.1 Initial Release
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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 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 .................. 43
4.1 Main Components Placement............... 43
4.2 KEYPAD Components Placement ........ 44
4.3 FPCB Components Placement ............. 45
4.4 Baseband Components ........................ 45
4.5 Main Components (Description) ........... 46
4.6 Power On Trouble................................. 47
4.7 Charging Trouble .................................. 48
4.8 LCD Display Trouble............................. 50
4.9 Receiver Trouble................................... 52
4.10 Microphone Trouble ............................ 56
4.11 Vibrator Trouble .................................. 59
4.12 Keypad Backlight Trouble ................... 61
4.13 FOLDER Open/Close Trouble ............ 63
4.14 SIM Detect Trouble ............................. 65
4.15 Earphone Trouble ............................... 67
4.16 RF Part Troubleshooting......................72
5. DOWNLOAD .................................. 89
5.1 Download Setup.................................... 89
5.2 Download Procedure ............................ 90
6. SERVICE AND CALIBRATION...... 97
6.1 Calibration..............................................97
7. CIRCUIT DIAGRAM ..................... 101
8. PCB LAYOUT............................... 105
9. ENGINEERING MODE.................... 107
10. STANDALONE TEST.................... 108
10.1 Setting Method ............................... 108
11. EXPLODED VIEW &
REPLACEMENT PART LIST ..... 109
11.1 EXPLODED VIEW ............................ 109
11.2 Replacement Parts
<Mechanic component>.................... 111
<Main component> ........................... 113
11.3 Accessory ......................................... 124
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 MG210.
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 MG210 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 MG210 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 MG210 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 MG210 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:
APC Automatic Power Control
BB Baseband
BER Bit Error Ratio
CC-CV Constant Current - Constant Voltage
DAC Digital to Analog Converter
DCS Digital Communication System
dBm dB relative to 1 milliwatt
DSP Digital Signal Processing
EEPROM Electrical Erasable Programmable Read-Only Memory
EL Electoluminescence
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
SAW Surface Acoustic Wave
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
DCXO Digitally Control Crystal Oscillator
WAP Wireless Application Protocol
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2. General Performance
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2.1 Product Name
MG210: Support GPRS (Class 10)
2.2 Supporting Standard
2.3 Main Parts: GSM Solution
2. General Performance
Item Feature Comment
GSM900/DCS1800/PCS1900
Tri-Band (900/1800/1900 - MG210c)
GSM850/DCS1800/PCS1900
Supporting Standard Tri-Band (850/1800/1900 - MG210d)
Triple-Band
with seamless handover
Phase 2+(include AMR)
SIM Toolkit : Class 1,2,3,A~E
GSM850 TX : 824 - 849 MHz
GSM850 RX : 869 - 894 MHz
GSM900 TX : 880 - 915 MHz
Frequency Range GSM900 RX : 925 - 960MHz
DCS1800 TX : 1710 - 1785 MHz
DCS1800 RX : 1805 - 1880 MHz
PCS1900 TX : 1850 -1910 MHz
PCS1900 RX : 1930 -1990 MHz
WAP 2.0
Application Standard
JAVA 2.0
MG180c
Digital Baseband Calypso-AMR C035 (D751992AZHHR)
Analog Baseband IOTA Shrink (TWL3025)
RF Chip Aero II/ Si4210
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2. General Performance
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2.4 H/W Features
Item Feature Comment
Form Factor Single LCD Folder
1) Capacity Standard : Size(mm) :
Battery Li-ion, Min 830mAh (LG Chem) 34.15(W) x 53.55(H) x 4.5(T)
Standard : 84X44X21.5 mm Weight: 25g under
Size Standard : 84X44X21.5 mm
Weight 75gram
Volume 79cc
PCB One PCB : 8 Layers , 1t
Stand by time 250 hours more DRX9
Charging time 3 hours under
Talk time Min : 2hours GSM900 TX Level 5
GSM850 TX Level 5
RX sensitivity GSM 850/900 : -108 dBm
DCS/PCS : -106 dBm
TX output power GSM 850/900 : 33 dBm Class4 (GSM)
DCS /PCS : 30 dBm Class1 (DCS/PCS)
GPRS compatibility GPRS Class 10
SIM card type Plug-In SIM 3V
Main LCD
Display 128 x 128, 65K Color CSTN
Backlight : White LED
Built-in Camera N.A.
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2. General Performance
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Status Indicator 2 color LED
Alpha/numeric Key : 12 Function Key:
Function Key : 12 4 Key Navigation, I, SND,
Keypad Total # of Keys : 24 END/PWR, CLR, menu, select,
Side key up/down
ANT Fixed Type Internal Antenna
System connector 24 Pin
Ear Phone Jack 3 Pole (2.5mm)
PC synchronization YES
Memory Flash : 128Mbit
SRAM : 64Mbit
Speech coding FR, EFR, HR,AMR
Data & Fax Built in Data & Fax support
Vibrator Built in Vibrator
IrDA NO
MIDI(for Buzzer General MIDI 40 Poly Buzzer Function By Using
Function) Speaker Phone & MIDI IC
Voice Recording YES
Speaker Phone YES Speakerphone mode support
Travel Adapter YES
CDROM NO
Ear-Microphone
Options Data Cable
Cigarette Lighter Adapter
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2.5 S/W Features
2. General Performance
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Item Feature Comment
RSSI 0 ~ 5 Levels
Battery Charging 0 ~ 4 Levels
Key Volume 0 ~ 5 Level
Audio Volume 1 ~ 5 Level
Time / Date Display Yes
Multi- Language Yes English/Spanish/Portuguese
Quick Access Mode Phone Book / scheduler/ Sound / Message
Speed Dial Yes ( 2 ~ 9 ) Voice mail center -> 1 key
CLIP / CLIR Yes (different melody)
Phone Book 3 Numbers + 1 Memo + 1 e-mail- Total 255 Member
+ Group Select
Last Dial Number Yes (20)
Last Received Number Yes (20)
Last Missed Number Yes (10)
Search by Number / Name Name / Number
Group 7 Possible Rename
Fixed Dial Number Yes
Service Dial Number Yes
Own Number Yes
Voice Memo Yes
Call Reminder Yes
Network Selection Manual
Mute Yes
Call Divert Yes
Call Barring Yes
Call Charge (AoC) Yes
Call Duration Yes
SMS (EMS) 100 EMS : Release4
(Except Text align)
E- Mail No
SMS Over GPRS Yes
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2. General Performance
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Item Feature Comment
Game 1 Java Game
Calendar Yes
Memo 20
World Clock Yes
Unit Convert Length/Surface/Volume/Weight
Fax & Data Yes
Wall Paper Yes Default : 3ea
WAP Browser WAP 2. 0 Openwave 6.2
Download Melody / Yes Over WAP
Wallpaper
SIM Lock Yes Operator Dependent
SIM Toolkit Class 1, 2, 3, A - E
MMS No
EONS Yes
CPHS Yes V4.2
Camera NO
JAVA Yes CLDC V1. 1 / MIDP V 2.0
Download Over WAP
Voice Dia No
IrDA No
GPRS Yes Class10
Hold / Retrieve Yes
Conference Call Yes Max. 6
DTMF Yes
Memo pad Yes Max. 20
TTY No
AMR Yes
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3. H/W Circuit Description
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3.1 General Description
The RF parts consist of a transceiver part, a power amplifier part, a front-end module part, a voltage
supply part, and a VC-TCXO part.
The AeroII transceiver is composed of single RF chipset, Si4210-GM[U400] which is a quadband
GSM/GPRS wireless communications.
This device integrated a receiver based on a low IF (200KHz) architecture and a transmitter based on
modulation loop architecture. The transceiver employed a 3 wire serial interface to allow an external
system controller to write the control registers for dividers, receive path gain, power down setting, and
other controls.
3.2 Receiver Part
The receiver part uses a low-IF receiver architecture that allows for the on-chip integration of the
channel selection filters, eliminating the external RF image reject filters and the IF SAW filter required
in conventional super-heterodyne architecture. The Si4210-GM[U400] integrates four differential input
LNAs that are matched to the 200 Ohm balanced-output SAW filters through external LC matching
networks.
A quadrature image-rejection mixer downconverts the RF signal to a 200kHz intermediate frequency
(IF) with the RFLO from the frequency synthesizer. The mixer output is amplified with an analog
programmable gain amplifier (PGA) and quadrature IF signal is digitized with high resolution A/D
converters (ADCs).
The Si4210-GM[U400] downconverts the ADC output to baseband with a digital 200kHz quadrature
LO signal. Digital decimation and IIR filters perform digital filtering , and remove blocking and
reference interference signals. After filtering, the digital output is scaled with digital PGA, which is
controlled with the DGAIN[5:0] bits in register 20h. The amplified digital output signal go through with
DACs that drive a differential analog signal onto the RXIP,RXIN,RXQP and RXQN pins to interface to
standard analog ADC input baseband ICs.
3. H/W Circuit Description
Antenna Bar Number Rx Power (dBm)
5 →4-85dBm±2dBm
4 →3-90dBm±2dBm
Antenna Display 3 →2-95dBm±2dBm
2 →1-100dBm±2dBm
1 →0-105dBm±2dBm
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3. H/W Circuit Description
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3.2.1. RF Front End
RF front end consists of Front End Module(FL400), quad band LNAs integrated in transceiver(U400).
The Received RF signals (GSM-850 869MHz ~ 894MHz, EGSM 880 MHz ~ 960MHz, DCS 1710 MHz
~ 1880 MHz, PCS 1930MHz ~ 1990MHz) are fed into the antenna or mobile switch. An antenna
matching circuit is between the antenna and the mobile switch. The Front End Module(FL400) is used
for control the Rx and TX paths. And the input signals ANT_SW1 , ANT_SW2 and ANT_SW3 of a
FL400 are directly connected to baseband controller to switch either TX or RX path on.
Front End Module(FL400) is an antenna switch module for Quad band phone. The logic and current is
given below Table 3-2.
ADC
ADC
ADC
ADC
Digital Filter
Digital Filter
DAC
DAC
DAC
DAC
LOW
IF
LOW
IF
D
I
P
D
I
P
GSM
850
DCS
FL400
Front End Module
26MHz
I
Q
U400/Si4210
VCO + FREQUENCY
SYNTHESIZER
VCO + FREQUENCY
SYNTHESIZER
0/
90
0/
90
PGA PGA
X400
VC-TCXO
GSM
850
DCS
PCS
LNA
Baseband
(TI)
U101
(Calypso)
+
U100
(IOTA
Shrink)
Baseband
(TI)
U101
(Calypso)
+
U100
(IOTA
Shrink)
PCS
EGSM
EGSM
Figure 1. RF Receiver Block
Table 3-2. The Logic and Current
GSM900 Rx
DCS1800 Rx
GSM850 Rx
Tx 2GHz
Tx 1GHz
VC1Switch Mode
PCS1900 Rx
VC2 VC3 VDD
H
H
L
L
L
L
L
H
H
H
L
L
L
L
H
L
H
L
H
H
H
H
H
H
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3. H/W Circuit Description
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3.2.2. Synthesizer
The Aero II transceiver integrates two complete PLLs including VCOs, varactors, resonators, loop
filters, reference and VCO dividers, and phase detectors. The RF PLL uses two multiplexed VCOs.
The RF1 VCO is used for receive mode, and the RF2 VCO is used for transmit mode. The IF PLL is
used only during transmit mode. All VCO tuning inductors are also integrated. The IF and RF output
frequencies are set by programming the N-Divider registers, NRF1, NRF2 and NIF. Programming the
N-Divider register for either RF1 or RF2 automatically selects the proper VCO.
Transmit modes should always use f∅= 200kHz. The IF and RF output frequencies are set by
programming the N-Divider registers and also programmed via 3-wire interface with external system
controler.
Serial
I/O
Serial
I/O
Baseband
(TI)
U100
IOTA
Shrink
+
U101
Calypso
Baseband
(TI)
U100
IOTA
Shrink
+
U101
Calypso
U400/Si4210
RF1
RF2
PDIB
26MHz
X400
VC-TCXO
SCLK
SDIO
SEN
PDN
XTAL1
XOUT
XEN
Power
control
Power
control
Self
Tune
Self
Tune
1/N
1/N
1/N
1/N
DET
DET
Self
Tune
Self
Tune
DET
DET
To Rx/Tx
To Tx
RF PLL
IF PLL
PDRB
SDOSEL[4:0]
NIF[15:0]
NRF1[15:0]
NRF2[15:0]
1,2
1,2 65,130
65,130
÷ ÷ φ
φ
Figure 2. Synthesizer Block
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3. H/W Circuit Description
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3.3 Transmitter Part
The Transmitter part contains the transmitter parts of Si4210-GM[U400], Power Amp Module[U401]
and Front End Module[FL400]. The transmit section of Si4210-GM[U400] consists of an I/Q base band
up_converter, an offset phase-locked loop(OPLL) and two output buffers that can drive external power
amplifiers(PA).
The RF GMSK outputs from the transmit VCO are fed directly to the RF power amplifiers. The peak
output power and the profile of the transmitted burst are controlled by means of incorporated power
control circuits inside of PA and DAC output from the Base band Controller. The PA outputs pass to
the antenna connector via Front End Module.
DET
DET
2
2
1
1
2
2
IF PLL
IF PLL
I
Q
Baseband
(TI)
U100
IOTA
Shrink
+
U101
Calypso
Baseband
(TI)
U100
IOTA
Shrink
+
U101
Calypso
PA_BAND
ANT_SW1,ANT_SW2,ANT_SW3
RFOG RFOD
GSM 850/
EGSM DCS/ PCS
RF PLL
RF PLL
D
I
P
D
I
P
DCS
FL400
Front End Module
PCS
GSM 850/
EGSM
Si4210 (U400)
PAM RF3166 (U401)
PA PA
÷
÷
÷
φ
Figure 3. RF Transmit Block
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3. H/W Circuit Description
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3.3.1 Power Amplifier
The RF3166 [U401] is a quad-band EGSM 900/GSM 850/DCS/PCS power amplifier module that
incorporat es an indirect closed loop method of power control. The indirect closed loop is fully self-
contained and it do es not require loop optimization. It can be driven directly from the DAC output in
the baseband circuit. On-board power control provides over 37 dB of control range with an analog
voltage input(Vramp). Efficien cy is 60% at GSM and 55% at DCS/PCS.
3.3.2. 26MHz Clock
The 26 MHz clock consists of a TCXO(Temperature Compensated Crystal Oscillator) which oscillates
at a frequency of 26 MHz. It is used within the Si4210 RF Main Chip, BB Analog chip-set(IOTA
Shrink), Digital chip-set(Calypso-).
Figure 5. VC-TCXO Circuit
Figure 4. Functional Block Diagram
1u
RF2.85V
26MHz
GND
2
OUT 3
4
VCC
1VCONT
C438
X400
R418 15K
1000p
C439
1000p
C437
TCXO_OUTAFC
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3. H/W Circuit Description
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3.3.3 Power Supplies and Control Signals
An external regulator(U403) is used to provide DC power to RF part. Every RF component except
power amp module uses this external regulator.
Figure 6 External regulator Circuit
RF2.85V VBAT
13 VOUT
R1114D281D-TR-F U403
CE 6
2GND1
5GND2
4
NC
VDD
1u
C441
C440
1u C442
1u
RF_EN
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