LG 410G User manual

Service Manual Model : LG410G
Internal Use Only
Service Manual
LG410G
Date: April, 2009 / Issue 1.0

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Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
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REVISED HISTORY
DATE ISSUE CONTENTS OF CHANGES S/W VERSION
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
LG410G.

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LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
1. INTRODUCTION

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Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Table Of Contents
1. INTRODUCTION...............................................7
1.1 Purpose......................................................................7
1.2 Regulatory Information.................................................7
1.3. ABBREVIATION ...........................................................9
2. PERFORMANCE............................................. 10
2.1 Product Name ...........................................................10
2.2 Supporting Standard..................................................10
2.3 Main Parts: GSM Solution ..........................................10
2.4 H/W Features ..........................................................11
2.5 S/W Features ............................................................13
3. H/W Circuit Description ...............................15
3.1 Digital Main Processor (Locosto).................................15
3.2 Power Amplifier Module (SKY77318) .........................20
3.3 26 MHz Clock (DCXO)................................................21
3.4 RTC(32.768KHz Crystal) ............................................22
3.5 LCD Interface(8-bit Parallel interface)..........................23
3.6 SIM Card Interface.....................................................24
3.7 KEYPAD Interface ......................................................24
3.8 Battery Charging Block Interface ................................25
3.9 RF Interface ..............................................................26
3.10 Audio Interface ........................................................28
3.11 Key LED Interface....................................................30
3.12 Vibrator Interface.....................................................30
3.13 Memory Interface ....................................................31
3.14 Power Block Interface..............................................32
4. TROUBLE SHOOTING..................................... 33
4.1 Trouble Test Set-up....................................................33
4.2 RF Part Component ...................................................34
4.3 RX Receiver Part .......................................................37
4.4 TX Transmitter Part ....................................................40
4.5 Power On Trouble ......................................................45
4.6 Charging Trouble .......................................................47
4.7 RTC Trouble ..............................................................49
4.8 LCD Trouble ..............................................................50
4.9 Speaker & Receiver Trouble........................................52
4.10 Headphone Trouble..................................................55
4.11 Microphone Trouble .................................................57
4.12 SIM Card Trouble.....................................................59
4.13 KEY backlight Trouble ..............................................61
4.14 Vibrator Trouble .......................................................63
5. Trouble shooting .......................................... 65
5.1 Download Setup ........................................................65
5.2 Download Procedure .................................................66
6. BLOCK DIAGRAM..........................................73
7. CIRCUIT DIAGRAM........................................ 75
8. BGA Pin Map ................................................ 81
9. PCB LAYOUT .................................................83
10. RF Calibration ............................................ 87
10.1 What’s the Rx Calibration? .......................................87
10.2 What’s the Tx Calibration?........................................87
10.3 Calibration program - HOT_KIMCHI ..........................88
10.4 Calibration Setting ...................................................89
10.5 Calibration Steps .....................................................89
11. EXPLODED VIEW & REPLACEMENT
PART LIST .................................................. 95
11.1 EXPLODED VIEW .....................................................95
11.2 Replacement Parts ..................................................97
11.3 Accessory .............................................................113

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LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes

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Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
1. INTRODUCTION
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 LG410G
1.2 Regulatory Information
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.
A. Security
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.
B. Incidence of Harm
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 LG410G 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.
C. Changes in Service
Maintenance limitations on the LG410G 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.
D. Maintenance Limitations

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LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
1. INTRODUCTION
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The LG410G 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.
E. Notice of Radiated Emissions
The pictures in this manual are for illustrative purposes only; your actual hardware may look
slightly different.
F. Pictures
An LG410G may interfere with sensitive laboratory equipment, medical equipment, etc.
Interference from unsuppressed engines or electric motors may cause problems.
G. Interference and Attenuation
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.
ATTENTION

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Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
1. INTRODUCTION
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 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
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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LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
2. GENERAL PERFORMANCE
2. GENERAL PERFORMANCE
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2.1 Product Name
2.2 Supporting Standard
2.3 Main Parts: GSM Solution
LG410G : Support GSM
LG410G
Digital Baseband TI Locosto
RF Chip SKY77318
Item Feature Comment
Supporting Standard EGSM/GSM850/DCS/PCS
Quad-Band (850/900/1800/1900)
with seamless handover
Phase 2+(include AMR)
SIM Toolkit : Class 1,2,3
Frequency Range GSM850 TX : 824.2 –848.8
GSM850 RX : 869.2 –893.8
EGSM TX : 880.2 –914.8 MHz
EGSM RX : 925.2 –959.8 MHz
DCS1800 TX : 1710.2 –1784.8 MHz
DCS1800 RX : 1805.8 –1879.8 MHz
PCS1900 TX : 1850.2 –1909.8 MHz
PCS1900 RX : 1930.2 –1989.8 MHz
Application
Standard
SMS : Yes

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Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
2. GENERAL PERFORMANCE
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2.4 H/W Features
Item Feature Comment
Form Factor Folder type LCD : 65K CSTN, 128 x128
Battery
Capacity
Standard: Li-Ion, 800mAh(Min)
Packing Type: Soft Pack
Size Standard: 88 x 47 x 18.7 mm L×W×H
Weight 81g With Battery
PCB One PCB :6 Layers, 0.8t
AVG TCVR
current (mA)
Max : 225 mA (GSM, Power Level 5)
Max : 90 mA (GSM, Power Level 19)
Standby Current 1.5 mA @ Paging Period 6
Standby time 500 hours @ Paging Period 6
Charging time Below 3 hours @ Power Off /800mAh
Talk time Min : 3.5hr@Power Level 5(GSM850)
Min : 4.5hr@Power Level 0(PCS) @ 800 mAh
RX sensitivity GSM 850 : -109 dBm
DCS/PCS : -109 dBm Condition: conducted
TX output power GSM 850 : 32.5 dBm
DCS/PCS : 29.5 dBm
Class4 (GSM850)
Class1 (PCS)
SIM card type Plug-In SIM 3V
Display
Main LCD : 262k TFT
Sub LCD : 96 x 64 FSTN LCD
Backlight : White LED
Keypad
Alphanumeric Key : 12
Function Key : 10
Total Number of Keys : 22
Function Key:
5 Key Navigation,
F1, F2, C, SND, END/PWR

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LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
2. GENERAL PERFORMANCE
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Item Feature Comment
Antenna Internal Antenna Quad-band
System connector 18 Pin
Ear Phone Jack 18 Pin
PC synchronization No
Memory Flash : 128Mbit / SRAM : 64Mbit Spansion
Speech coding FR, EFR, HR, AMR
Data & Fax Yes
Vibrator Built in Vibrator
MIDI (for Buzzer
Function) SW Decoded 16Poly
Voice Recording Yes 30 sec.
Travel Adapter Yes
Options Ear-Microphone
Data Cable TBD
TBD

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Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
2. GENERAL PERFORMANCE
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2.5 S/W Features
Item Feature Comment
RSSI 0~5 level
Quick Access Mode Yes U:Message, D:Phonebook
L:My stuff, R:IM
Battery Charging 0~3 level
Key Volume 0~7 level
Effect sound volume 0~7 level
Audio Volume 0~7 level
Time/Date Display Yes NITZ
Multi-language Yes English /Spanish /French
PC Sync No
Speed Dial Yes
Speaker Phone Yes
CLIP/CLIR Yes
Phonebook Yes(2 Numbers + 1 Memo + 1 e-mail +
Group Select + Picture )Total 500 members
Last Dial Number Yes (40)
Last Received
Number Yes (40)
Last Missed Number Yes (40)
Search Number/Name Yes
Group Yes 8ea (Possible Rename)
Fixed Dial Number Yes
Service Dial Number Yes
Own Number Yes
Voice Memo Yes
Call Reminder Yes
Network Selection Yes

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LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
2. GENERAL PERFORMANCE
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Item Feature Comment
Call Divert Yes
Call Barring Yes
Call Charge (AoC) Yes
Call Duration Yes
SMS Yes Max 100
EMS melody/Picture
Send/ Receive/ Save No
SMS Over GPRS No
E-Mail No
Long Message Yes Max. 1530 Characters
Cell Broadcast No AT&T required not supported
Download Melody /
Wallpaper Yes
Game Yes Default 1ea
Calendar Yes
Memo Pad Yes
World Clock Yes
Unit Convert Yes Currency/Area/Length/Volume
/Weight/Temperature/Velocity
Fax & Data Built in Data & Fax support
Wall Paper Yes Default 5ea
WAP Browser Yes
Download Yes
SIM Lock Yes Operator Dependent
SIM Toolkit Class 1, 2, 3
MMS Yes
EONS Yes
CPHS Yes
ENS Yes
Conference Call Yes Max. 3
DTMF Yes

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Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
3. H/W Circuit Description
3. H/W Circuit Description
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3.1 Digital Main Processor (Locosto)
Figure. 3-1 Locosto FUNCTIONAL BLOCK DIAGRAM

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LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. H/W Circuit Description
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3.1.1 Overview of Locosto
The Locosto is a GSM base band modem including RF transceiver covering the low bands
GSM850 /GSM900 and high bands GSM1800 / GSM1900 bands. Locosto is Dual Band,
therefore, it supports by default a low / high pair of bands at the same time:
1. GSM850 / GSM1800
2. GSM850 / GSM1900
3. GSM900 / GSM1800
4. GSM900 / GSM1900
The Locosto is optimized for voice-centric Mobile Phone applications.
The Locosto is designed as a single chip solution that integrates the digital, mixed-signal, RF
functionality and a direct-to-battery Power Management Unit.
The transceiver consists of:
• Constant gain direct conversion receiver with an analog I/Q base band interface
• Fully integrated Sigma/Delta-synthesizer capability
• Fully integrated two-band RF oscillator
• Two-band digital GMSK modulator with digital TX interface
• Digitally controlled crystal oscillator generating system clocks.
The Locosto supports a direct battery connection, hence eliminating the need for an external
Power Management Unit. The Locosto has different power down modes and an integrated
power up sequencer.
The Locosto is powered by the ARM7(104MHz) MCU and C54® DSP cores.
The operating temperature range from -40°C to 85°C. It is manufactured using the 0.13 μm
CMOS process.

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Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
3. H/W Circuit Description
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3.1.2 Features
The LOCOSTO device is an integrated solution that embeds a digital baseband(DBB) and a digital
radio processor (DRP) on the same die. The LOCOSTO device targets solutions for GSM/GPRS
(low-cost global system for mobile communications/general packet radio service).
The DRP is a digital radio-frequency (RF) transceiver that supports up to a GPRS class12. The DRP
is designed for quad-band operation, supporting both the European and the US bands (E-GSM 900
and DCS 1800 bands, GSM850 and PCS 1900 bands, respectively).
The DBB supports the processing of GSM radio signals in the switching circuit mode and the packet
data mode (GPRS) for up to class 10, including evolutions such as the SAIC and localization system
(A-GPS) in compliance with the European Telecommunications Standards Institute specification.
The LOCOSTO silicon process is a 90-nm digital CMOS technology.
The LOCOSTO device includes two versions: LOCOSTO and LOCOSTO Lite.
The LOCOSTO Lite device does not include the camera interface and the GPRS.
LOCOSTO offers the following features:
□Dual processors:
- 104-MHz ARM7TDMI® microprocessor unit (MPU)
- 104-MHz customized digital signal processor (cDSP) c54x
□Internal memory:
- 154KW DSP read-only memory (ROM)
- 30KW DSP static random-access memory (SRAM)
- 2.5Mb MPU SRAM
- 1.5Mb MPU ROM
□External memory support:
- 1.8/3 V subscriber identity module (SIM) I/F
- Direct memory access (DMA) to external memory
- Burst mode, page-mode external memory: NAND and NOR flash and SRAM (frame buffer)
□Hardware security
- Flash content
- International mobile equipment identity (IMEI) protection
- SIM lock
□Peripheral interfaces
- Vibrator PWM control signal
- Universal serial bus (USB) 2.0 full-speed client
- Keypad
- Universal asynchronous receiver/transmitter (UART)
- Multichannel serial interface (MCSI)
-Bluetooth
- Camera
- Primary liquid-crystal display (LCD): 8-bit parallel interface Up to QVGA (quarter video graphics
array) 256K colors
- Secondary LCD: Serial interface

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LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. H/W Circuit Description
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□DRP2.0 RF integrated RF:
- Digital RF 4 band GSM/GPRS up to Class 12 (On the LOCOSTO Lite device, GSM is dual-band
muxed and GPRS is not available.)
- -110 dBm sensitivity
- Digital PA driver output level +2 dBm
- 0.7 degrees RMS phase error
- Integrated digitally controlled crystal oscillator (DCXO)
□Software support:
- GSM/GPRS layer 1,2,3 (GPRS is not available on LOCOSTO Lite.)
- Adaptive multirate (AMR), full rate (FR), half rate (HR), enhanced full rate (EFR)
- Teletypewriter (TTY)
-SAICoverGSM
- Man machine interface (MMI) for test
- Wireless application protocol (WAP), enhanced message service(EMS), multimedia message
service (MMS), JAVA
□Multimedia support:
- Internal 300 KP camera support
- MP3 player
- Up to 32 polyphonies stereo midi player
- Up to 32 polyphonies mono midi ringer
- JPEG encode and decode
The LOCOSTO device communicates with the analog TWL3031 external subsystem, which provides
the following capabilities:
- Handset microphone and speaker
- Headset mono/stereo audio speakers and microphone connection
- Melody ringer (hands-free) and buzzer
- Battery pack (Nimh/Li-ion) and six 7-V regulated or 20-V nonregulated charger
- Vibrator motor control
- Real-time clock (RTC) 32-kHz crystal
The following external/extra subsystems are also supported:
-TI−Bluetooth (BRF6150) wireless short-distance connectivity
- Voice/audio and data
- TI-AGPS/TWL5002 localization system (I/F provision)
- Digital camera systems (not available on LOCOSTO Lite)
- VGA camera sensor/module, for example, AGILENT ADCM-2700
(not available on LOCOSTO Lite)
- OMAP-DMxx(GoldenEye) camera companion chip (up to 3M-pixel)
(not available on LOCOSTO Lite)
- UART cable or IrDA (infrared data association)
- Boot-manufacturing capability from the USB link
- FM radio receiver (for example, Philips TEA5767/68)
- Primary (Qcif) and secondary LCD
- NAND flash-based media storage (for example, on-board SmartMedia)
-USBcarkit

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Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
3. H/W Circuit Description
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3.1.3 Asynchronous Operation Mode Concept
The Locosto can operate in either:
• The traditional synchronous mode with the 26MHz system clock synchronized on the base station
• A special asynchronous mode (XO concept).
In the asynchronous mode the 26MHz clock input is not synchronized with the base station; the residual
frequency offset is compensated in the digital signal processing domain. This processing includes
frequency and timing compensation of the baseband and voiceband signals.
3.1.4 Receiver Antenna Bar Display
Antenna Bar Number RX Power (dBm)
Antenna display
5->4 over -92dBm
4->3 -93dBm~ -100dBm
3->2 skip
2->1 -104dBm~ -105dBm
1->0 less -106dBm
Antenna Bar RSSI Range (dBm)
Over -92
-93~ -100
-100~-101
-101 ~ -103
-104 ~ -105
Less -106
No service
OFF

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LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. H/W Circuit Description
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The module consists of separate GSM PA and DCS1800/PCS1900 PA blocks, impedance-matching
circuitry for 50 Ωinput and output impedances and a Power Amplifier Control (PAC) block with an
internal current-sense resistor. The custom BiCMOS integrated circuit provides the internal PAC function
and interface circuitry. Fabricated onto a single Gallium Arsenide (GaAs) die, one Heterojunction Bipolar
Transistor (HBT) PA block supports the GSM bands and the other supports the DCS1800 and PCS1900
bands. Both PA blocks share common power supply pins to distribute current.
The GaAs die, the Silicon (Si) die, and the passive components are mounted on a multi-layer laminate
substrate. The assembly is encapsulated with plastic overmold.
RF input and output ports of the SKY77318 are internally matched to a 50 Ωload to reduce the number
of external components for a quad-band design. Extremely low leakage current (2.5 μA, typical) of the
dual PA module maximizes handset standby time. The SKY77318 also contains band select switching
circuitry to select GSM (logic 0) or DCS/PCS (logic 1) as determined from the Band Select (BS) signal.
In Figure 1 below, the BS pin selects the PA output (DCS/PCS_OUT or GSM_OUT) and the Analog
Power Control (VAPC) controls the level of output power.
The VBATT pin connects to an internal current-sense resistor and interfaces to an integrated power
amplifier control (iPAC™) function, which is insensitive to variations in temperature, power supply,
process, and input power.
The ENABLE input allows initial turn-on of PAM circuitry to minimize battery drain.
3.2 Power Amplifier Module (SKY77318)
The SKY77318 Power Amplifier Module (PAM) is designed in a low profile (1.2 mm), compact form
factor for quad-band cellular handsets comprising GSM850/900, DCS1800, and PCS1900 operation.
The PAM also supports Class 12 General Packet Radio Service (GPRS) multi-slot operation.
Figure. 3-2 SKY77318 FUNCTIONAL BLOCK DIAGRAM

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Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
3. H/W Circuit Description
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3.3 26 MHz Clock (DCXO)
Figure. 3-3 Locosto DCXO Overview
DCXO (Digitally Controlled Crystal Oscillator) and VCTCXO (Voltage Controlled Temperature
Compensated Crystal Oscillator) are two different techniques used to maintain the mobile’s reference
oscillator’s accuracy over time. The reference oscillator’s accuracy over time will vary due to initial
crystal frequency offset, temperature drift and aging. These static and dynamic frequency variations have
to be compensated, otherwise the mobile would be in danger of losing connection to the network.
The technique used to perform the frequency compensation is generally termed Automatic Frequency
Control (AFC). To summarize the operation of DCXO, GSM Baseband processor will calculate the
AFC compensation (which is continuously updated) required based on the measured frequency error.
Then the required AFC compensation is sent to the LUXO (Lineari-Zation Unit of Crystal Oscillator),
which in turns control the DCXO core and generates the 26MHz system clock.
W-191-866
X101
GND1 2
4GND2
HOT1
1
3
HOT2
26MHz
C112
4.7p
R104
220K C109
10p
C108
0.5p
XTAL D15
U2
SPARE2
U1
SPARE3
NC12 G12
NC13 L11
K11
NC14
NC15 J11
H11
NC16 L10
NC17
NC18 K10
J10
NC19
NC8 K12 NC9
J12
NC10
NC11 H12
R105
1.5M
1000p
C107
DITHERING