LG GM200 User manual
Service Manual Model : GM200
Internal Use Only
Service Manual
GM200
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
Table Of Contents
1. INTRODUCTION...............................................5
1.1 Purpose......................................................................5
1.2 Regulatory Information.................................................5
1.3 Abbreviations ..............................................................7
2. GENERAL PERFORMANCE ..............................9
2.1 H/W Features..............................................................9
2.2 Function (Software)....................................................10
2.3 Technical Specification...............................................11
3. TECHNICAL BRIEF......................................... 16
3.1 Baseband circuits technical brief ................................16
3.2 Analog Main Processor(AD6725-ATLAS3H LITE, U103) 20
3.3 AUDIO control............................................................33
3.4 MEMORY(PF38F5060M0Y0BF, U101 )........................41
3.5 Micro-SD & SIM Card Interface...................................44
3.6 CAMERA, LCD FUNCTION ..........................................45
3.7 Keypad Interface .......................................................51
3.8 KEY BACLKLIGHT LED Interface..................................53
3.9 Vibrator Interface.......................................................54
3.10 JTAG interface connector .........................................54
3.11 CLK ........................................................................55
3.12 18pin Multi Media Interface connector......................56
3.13 Front End Module control &
Power Amplifier Module (SKY77531, U502) ..............58
3.14 RF Tranceiver(AD6548, U501) ..................................60
3.15 BT Module with integrated FM tuner
(BCM2048SB0, U401).............................................67
3.16 FM Radio ................................................................69
4. TROUBLE SHOOTING..................................... 70
4.1 RF Component ..........................................................70
4.2 RX Trouble ................................................................71
4.3 TX Trouble.................................................................76
4.4 Power On Trouble ......................................................82
4.5 Charging Trouble .......................................................84
4.6 Vibrator Trouble .........................................................86
4.7 LCD Trouble ..............................................................88
4.8 Camera Trouble.........................................................91
4.9 Speaker Trouble ........................................................94
4.10 Receiver Trouble......................................................97
4.11 Headphone(3.5Ø Trouble).........................................99
4.12 Microphone Trouble ...............................................103
4.13 SIM Card Interface Trouble .....................................105
4.14 key backlight Trouble .............................................107
4.15 RTC Trouble ..........................................................109
4.16 Micro SD Trouble...................................................111
4.17 Bluetooth Trouble...................................................113
4.18 FM Radio Trouble...................................................115
5. Downloading .............................................. 117
5.1 Download................................................................117
6. BLOCK DIAGRAM........................................ 123
7. CIRCUIT DIAGRAM...................................... 125
8. BGA Pin Map ..............................................131
9. PCB LAYOUT ...............................................135
10. ENGINEERING MODE................................. 141
11. STAND ALONE TEST.................................. 148
11.1 Introduction...........................................................148
11.2 Setting Method......................................................148
11.3 Means of Test........................................................149
12. AUTO CALIBRATION.................................. 151
12.1 Overview...............................................................151
12.2 Equipment List ......................................................151
12.3 Test Jig Operation..................................................152
12.4 Procedure.............................................................153
12.5 AGC......................................................................156
12.6 APC......................................................................156
12.7 ADC......................................................................156
13. EXPLODED VIEW & REPLACEMENT
PART LIST ................................................157
13.1 EXPLODED VIEW ...................................................157
13.2 Replacement Parts ................................................159
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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
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 this phone 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 this model 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.
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LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
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
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.
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Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
1. INTRODUCTION
1.3 Abbreviations
For the purposes of this manual, following abbreviations apply:
Offset Phase Locked LoopOPLL
Light Emitting DiodeLED
Low Drop OutputLDO
Liquid Crystal DisplayLCD
Intermediate FrequencyIF
International Portable User IdentityIPUI
Global System for Mobile CommunicationsGSM
General Purpose Interface BusGPIB
Gaussian Minimum Shift KeyingGMSK
Flexible Printed Circuit BoardFPCB
Electrostatic DischargeESD
Electrical Erasable Programmable Read-Only MemoryEEPROM
Digital Signal ProcessingDSP
Power ratio in decibels (dB) of the measured power referenced to one milliwatt (mW)dBm
Digital Communication SystemDCS
Digital to Analog ConverterDAC
Constant Current – Constant VoltageCC-CV
Bit Error RatioBER
BasebandBB
Automatic Power ControlAPC
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LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved.
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1. INTRODUCTION
Wireless Application Protocol
WAP
Voltage Control Temperature Compensated Crystal OscillatorVCTCXO
Voltage Controlled OscillatorVCO
Universal Asynchronous Receiver/TransmitterUART
Time Division Multiple AccessTDMA
Time Division DuplexTDD
Travel AdapterTA
Side Tone Masking RatingSTMR
Pseudo SRAMPSRAM
Static Random Access MemorySRAM
Sending Loudness RatingSLR
Subscriber Identity ModuleSIM
Surface Acoustic WaveSAW
Real Time ClockRTC
Root Mean SquareRMS
Receiving Loudness RatingRLR
Radio FrequencyRF
Public Switched Telephone NetworkPSTN
Phase Locked LoopPLL
Programmable Gain AmplifierPGA
Printed Circuit BoardPCB
Power Amplifier ModulePAM
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Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
2. SYSTEM SPECIFICATION
2. SYSTEM SPECIFICATION
2.1 H/W Features
Item Specifications
Band GSM Quad Band(850/900/1800/1900)
Type Bar type
Dimension 106 x 48 x 14.5 mm
Weight 80 g
Battery 1100mAh Li-ion (950mAh option)
Talk Time 8.4 hours(1100mA) / 7.3hours(950mA) @ PCL10
Stand-by Time 450 hours(1100mA) / 380hours(950mA) @ Paging Period 9
Backup Battery About 0.5mAh(over 50 hours without main battery)
Antenna Internal Type (Quad-band)
LCD (MAIN) 2.0"(176x220 pixels), 262K Color TFT LCD
Back Light Yes
Back Light color White
Vibrator Yes
Speaker & Receiver Module speaker(2520 1EA, 1810 2EA)
C-MIC Yes
Earphone Jack 3.5 phi (stereo)
SIM Yes (Plug in Type) : 3.0V
MIDI 64 poly
External Memory Micro - SD
I/O Connect 18 Pins (included Charging and USB)
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2. SYSTEM SPECIFICATION
Function Detail Item Specification
Operating System OS OAMX
Data Circuit O
Packet O
Connectivity Infrared (IrDA) X
Bluetooth OVer.2.0
USB O Ver.2.0
USB Mass storage O
RS232 X
Voice Function Voice Recording O
Voice Command XDigit Dial
XName Dial
XMenu
XPhonebook Searching
Answering machine XDriving, Meeting, user define(absent)
Memory User Memory O14MB
OMMS
OPictures (Still Image & Moving Image)
OMP3 (Music Contents)
OJava Contents
OWallpaper
ORingtone
OExternal memory (micro SD)
2.2 Function (Software)
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Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
2. SYSTEM SPECIFICATION
2.3 Technical Specification
Item Description Specification
1Frequency Band
GSM850
TX : 824 ~ 849MHz , RX : 869 ~ 894 MHz
GSM900
TX: 880 ~ 915MHz, RX : 925 ~ 960MHz
DCS1800
TX: 1710 ~ 1785MHz, RX: 1805 ~ 1880MHz
PCS1900
TX: 1850 ~ 1910MHz, RX: 1930 ~ 1990MHz
2Phase Error RMS < 5 degrees, Peak < 20 degrees
3Frequency Error <0.1 ppm
4Power Level
Level Power Toler. Level Power Toler.
6 31dBm 3dB 14 15dBm 3dB
7 29dBm 3dB 15 13dBm 3dB
8 27dBm 3dB 16 11dBm 5dB
9 25dBm 3dB 17 9dBm 5dB
10 23dBm 3dB 18 7dBm 5dB
11 21dBm 3dB 19 5dBm 5dB
12 19dBm 3dB
GSM850/GSM900
5 33dBm 2dB 13 17dBm 3dB
Level Power Toler. Level Power Toler.
1 28dBm 3dB 9 12dBm 4dB
2 26dBm 3dB 10 10dBm 4dB
3 24dBm 3dB 11 8dBm 4dB
4 22dBm 3dB 12 6dBm 4dB
5 20dBm 3dB 13 4dBm 4dB
6 18dBm 3dB 14 2dBm 5dB
7 16dBm 3dB 15 0dBm 5dB
DCS1800/PCS1900
0 30dBm 2dB 8 14dBm 3dB
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2. SYSTEM SPECIFICATION
5Output RF Spectrum
(due to modulation)
Offset from Carrier (kHz). Max. dBc
100 +0.5
200 -30
250 -33
400 -60
600~ <1,200 -60
1,200~ <1,800 -60
1,800~ <3,000 -63
3,000~ <6,000 -65
6,000 -71
GSM850/GSM900
Offset from Carrier (kHz). Max. dBc
100 +0.5
200 -30
250 -33
400 -60
600~ <1,200 -60
1,200~ <1,800 -60
1,800~ <3,000 -65
3,000~ <6,000 -65
6,000 -73
DCS1800/PCS1900
6
Output RF Spectrum
(due to switching
transient)
Offset from Carrier (kHz). Max. dBm
400 -19
600 -21
1,200 -21
1,800 -24
Item Description Specification
GSM850/GSM900
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Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
2. SYSTEM SPECIFICATION
Item Description Specification
6
Output RF Spectrum
(due to switching
transient)
Offset from Carrier (kHz). Max. dBm
400 -22
600 -24
1,200 -24
1,800 -27
7Spurious Emissions Conduction, Emission Status
8Bit Error Ratio
GSM850/GSM900
BER (Class II) < 2.439% @-102 dBm
DCS1800/PCS1900
BER (Class II) < 2.439% @-102 dBm
9RX Level Report Accuracy 3 dB
10 SLR 83 dB
11 Sending Response
300 -12
1,000 -6
2,000 -6
3,000 -6
Frequency (Hz) Max.(dB) Min.(dB)
100 -
200 -
4,000 -
3,400 -9
0
0
4
4
-12
0
0
4
12 RLR 23 dB
DCS1800/PCS1900
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2. SYSTEM SPECIFICATION
Item Description Specification
13 Receiving Response
300 -7
500 -5
1,000 -5
3,000 -5
Frequency (Hz) Max.(dB) Min.(dB)
100 -
200 -
4,000
3,400 -10
2
*
0
2
-12
0
2
2
14 STMR 135 dB
* Mean that Adopt a straight line in between 300 Hz
and 1,000 Hz to be Max. level in the range.
15 Stability Margin > 6 dB
-20
-10
0
7
dB to ARL (dB) Level Ratio (dB)
-35
-30
10
30.7
33.3
33.7
31.7
17.5
22.5
25.5
16 Distortion
17 Side Tone Distortion Three stage distortion < 10%
18 System frequency
(26 MHz) tolerance 2.5 ppm
19 32.768KHz tolerance 30 ppm
20 Ringer Volume
At least 58 dBspl under below conditions:
1. Ringer set as ringer.
2. Test distance set as 1 m
- 15 -
Copyright © 2009 LG Electronics. Inc. All right reserved.
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2. SYSTEM SPECIFICATION
Item Description Specification
21 Charge Current
Fast Charge : Typ. 650 mA
Slow Charge : Typ. 94mA
Total Charging Time : < 3 hours
Bar Number Power
22 Antenna Display
Battery Bar
23 Battery Indicator
24 Low Voltage Warning
( Blinking Bar)
25 Forced shut down
Voltage 3.33 0.05V
27 Battery Type
Li-Ion Battery
Standard Voltage = 3.7 V
Battery full charge voltage = 4.2 V
Capacity: 1100mAh (950mAh optional)
28 Travel Charger
Switching-mode charger
Input: 100 ~ 240 V, 50/60 Hz
Output: 5.2 V, 700 mA
26 Sustain RTC
without battery Over 50 hours
1ÆBlinking
3
3Æ23.75 0.05V
3.75 0.05V
3.540.05V
2Æ13.64 0.05V
Call:Every 1 min. 3.54 0.05V 3.51 0.05V
Standby:Every 3 min. 3.54 0.05V 3.51 0.05V
5 Æ4
4 Æ2
2 Æ1
1 Æ0
7
7 Æ5
-98 2 dBm
-101 2 dBm
-104 2 dBm
-106 2 dBm
-92 2 dBm
-92 2 dBm
1100mA 950mA
3.76 0.05V
3.77 0.05V
3.510.05V
3.65 0.05V
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LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved.
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3. TECHNICAL BRIEF
3. TECHNICAL BRIEF
Figure. 3-1-1 AD6725-ATLAS3HLITE FUNCTIONAL BLOCK DIAGRAM
The AD6725 is a tightly integrated single-package baseband processing solution offered by Analog Devices
as part of the AD20msp520 SoftFone® chipset family. The AD6725 incorporates all digital, analog, and power
management functions required in GSM, GPRS, EGPRS handsets with advanced multimedia and system
power management capabilities.
3.1 Baseband circuits technical brief
3.1.1 AD6725-ATLAS3HLITE functional Block diagram.
- 17 -
Copyright © 2009 LG Electronics. Inc. All right reserved.
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LGE Internal Use Only
3. TECHNICAL BRIEF
3.1.2 Features of AD6725-ATLAS3HLITE
Complete Single-Chip Programmable Digital Baseband Processor with four main
subsystems
MCU Control Processor Subsystem:
32-bit ARM926EJ-S® MCU Control Processor
208 MHz operation at 1.2V
2 dedicated caches, 16kB each, for instructions and data
4kB Instruction Tightly Coupled Memory (TCM)
2-Mbit of on-chip System SRAM
Ciphering co-processor for GPRS supporting GEA1 and GEA2 encryption algorithms
Kasumi cipher coprocessor for GEA3 encryption
Dedicated multi-channel DMA controller
DSP Subsystem:
16-bit fixed-point Blackfin® DSP Processor
208 MHz operation at 1.2V
Memory:
- L1 program space: 64kB SRAM and 16kB configurable as instruction cache or SRAM
- L1 data space: Two banks of 16K bytes, each with 8K bytes of dedicated SRAM and an
additional 8K bytes that can be configured as either cache or SRAM
- L2 space: 64kB SRAM
Ciphering coprocessor (GEA1 and GEA2)
Kasumi cipher coprocessor for GEA3 encryption
Dedicated multi-channel DMA controller
Peripherals Subsystem:
Shared on-chip peripherals and off-chip interfaces
Support for Burst-mode, Page-mode NOR Flash memory
Support for NAND Flash memory
Support for SRAM, PSRAM (cellular RAM), and SDRAM
Full-Speed USB 2.0 Dual-Role Interface with OTG (On-The-Go) Host Mode or Peripheral-only mode
Serial Display Interface
8x8 Keypad Interface
Thumbwheel Interface
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3. TECHNICAL BRIEF
4 Independent Programmable Backlight Drivers
3 Independent Programmable Service Lights
1.8V and 3.0V, 64 kbps SIM Interface
Universal System Connector Interface
Multimedia Card (MMC) Interface
Secure Data (SD) Card Interface and SDIO
Slow, Medium and Fast IrDA transceiver interface
Applications Subsystem for Enhanced Multimedia:
Dedicated 8/16/18-bit interface for parallel displays
8/10-bit Parallel Peripheral Interface (PPI) for camera sensor
Image Signal Processing (ISP) module supporting resolutions up to 3.14 mega pixels.
Flexible 2-D DMA controller
Camera Flash synchronization strobe
Hardware image scaling
YCbCr/RGB color conversion
JPEG decoder hardware
Hardware JPEG compression
Analog Communications Subsystem:
GMSK and 8PSK Modulators
I-channel & Q-channel Transmit DACs and Filters
I-channel & Q-channel Receive ADCs and Filters
Power Ramp DAC
Power Management Subsystem:
High efficiency DC/DC voltage regulator
Multiple low-dropout linear voltage regulators
Battery charging & protection circuitry
Audio Subsystem:
8kHz & 16kHz Voiceband Codec
8-48kHz Stereo DAC
Two concurrent serial data ports for digital audio streams
Power amplifiers for mono earpiece, mono loudspeaker, and stereo headphones
- 19 -
Copyright © 2009 LG Electronics. Inc. All right reserved.
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3. TECHNICAL BRIEF
APPLICATIONS
GSM850 / GSM900 / GSM1800 / GSM1900 wireless terminals
GSM Phase 2+ compliant
GPRS Handsets up to Mutli-Slot Class 12
OTHER FEATURES
Real-Time Clock (RTC) with Alarm
Four General-Purpose Timers
Compatible with Othello® radio subsystem
Configurable interrupt controller architecture
Programmable bus arbitration to optimize system performance
Programmable Power Management and Clock Management
- Slow Clocking Scheme for Low Idle Mode Current
-PowerDownmodes
-Dynamic Core Voltage Scaling
-Active Leakage Current Management
Independent I/O Voltage Domains
On-chip support for EGPRS Data Services up to Class 12
JTAG Interface for Test and In-Circuit Emulation of both the MCU and DSP
Embedded Trace Macrocell for MCU Debug
Advanced features for security
- 20 -
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3. TECHNICAL BRIEF
3.2 Analog Main Processor(AD6725-ATLAS3H LITE, U103)
Figure. 3-2 AD6725-ATLAS3HLITE FUNCTIONAL BLOCK DIAGRAM
The AD6725-ATLAS3H LITE is a complete mixed-signal baseband processor that combines all of the data
converters and power supply regulators required for a GSM 900 / GSM 850 /
DCS 1800 / PCS 1900 mobile on a single device, including HSCSD, GPRS and EGPRS(RX).
- 21 -
Copyright © 2009 LG Electronics. Inc. All right reserved.
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LGE Internal Use Only
3. TECHNICAL BRIEF
General Description
The AD6725-ATLAS3HLITE baseband transmit section supports the following mobile station GMSK
modulation power classes:
• GSM 900/850 power classes 4 and 5,
• DCS 1800 power classes 1 and 2, and
• PCS 1900 power classes 1 and 2.
The AD6725-ATLAS3HLITE baseband transmit section supports the following mobile station 8-PSK
modulation power classes:
• GSM 900/850 power classes E2 and E3,
• DCS 1800 power classes E2 and E3, and
• PCS 1900 power classes E2 and E3.
The AD6725-ATLAS3H LITE baseband receive section supports GMSK and 8-PSK applications.
The AD6725-ATLAS3H LITE auxiliary section provides a voltage reference, an automatic frequency control
DAC, an auxiliary ADC, and light controllers. The auxiliary ADC provides two
channels for measuring temperature using discrete external devices placed in critical
locations. The AD6725-ATLAS3H LITE audio section provides 8 kHz and 16 kHz sampling rates forvoiceb and
data input and output and provides nine standard sample rates ranging from
8kHz to 48 kHz for personal audio output on two PCM Audio serial ports. The two Audio
serial ports allow support for concurrency. The AD6725-ATLAS3H LITE power management section provides
voltage regulators for digital and analog components, a battery charger, battery
protection circuitry, and power supply activation logic. The AD6725-ATLAS3H LITE digital processor interface
provides serial ports for control data, baseband transmit and receive data, and
two for audio data.
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