LG LG-S310 User manual

Service Manual Model : LG-S310
Internal Use Only
Service Manual
LG-S310
Date: December, 2010 / Issue 1.1

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Copyright © 2010 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. PERFORMANCE...................................................................9
2.1 HW Feature........................................................................................ 9
2.2 RF Spec..............................................................................................10
3. TECHNICAL BRIEF.............................................................11
3.1 General Description.....................................................................11
3.2 GSM Part...........................................................................................12
3.3 Functional Block Diagram.........................................................19
3.4 Baseband Processor Introductions .......................................20
3.5 Charging Control ..........................................................................31
3.6 Power ON/OFF...............................................................................33
3.7 SIM Interface...................................................................................34
3.8 MICRO SD Card Socket (ENSY0018601) ..............................35
3.9 Memory............................................................................................37
3.10 LCD Display...................................................................................40
3.11 LCD Backlight Illumination ....................................................42
3.12 Keypad Switching & Scanning..............................................45
3.13 Keypad Backlight Illumination .............................................46
3.14 u USB Multimedia interface connector.............................47
3.15 Camera...........................................................................................48
3.16 Audio...............................................................................................49
3.17 Bluetooth/FM (WYSBNBGX6)................................................55
4. TROUBLE SHOOTING .......................................................59
4.1 Trouble shooting test setup.....................................................59
4.2 Power on trouble..........................................................................60
4.3 Charging Trouble..........................................................................63
4.4 USB Trouble.....................................................................................65
4.5 SIM Detect Trouble.......................................................................68
4.6 Key Sense Trouble ........................................................................70
4.7 Keypad Backlight Trouble .........................................................73
4.8 Micro SD Trouble ..........................................................................75
4.9 Audio Trouble.................................................................................78
4.10 Camera Trouble...........................................................................93
4.11 Main LCD Trouble.......................................................................96
4.12 Vibrator Trouble..........................................................................99
4.13 BT Trouble .................................................................................. 101
4.14 FM Trouble................................................................................. 109
4.15 RF Trouble Shooting .............................................................. 121
5. DOWNLOAD................................................................... 139
6. BLOCK DIAGRAM........................................................... 155
7. CIRCUIT DIAGRAM ........................................................ 161
8. BGA Pin Map.................................................................. 171
9. PCB LAYOUT................................................................... 176
10. CALIBRATION............................................................... 183
10.2 Usage of Tachyon for RF Calibration and Test ............. 183
11. TEST MODE .................................................................. 186
12. EXPLODED VIEW & REPLACEMENT PART LIST ......... 191
12.1 EXPLODED VIEW...................................................................... 191
12.2 Replacement Parts.................................................................. 193
12.3 Accessory ................................................................................... 207

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LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes

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Copyright © 2010 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. INTRODUCTION
1.1 Purpose
This manual provides the information necessary to repair, calibration, description and download the features
of the LG-S310.
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 might 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 LG-S310 or compatibility with the net work,
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 LG-S310 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.

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LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
1. INTRODUCTION
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Copyright ཱྀ2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Onl
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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
LG-S310 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 © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
1. INTRODUCTION
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Copyright ཱྀ2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Onl
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1.3 ABBREVIATION
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
୛CLA Cigar Lighter Adapter
୛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
୛EGPRS Enhanced General Packet Radio Service
୛EDGE Enhanced Data rates for GSM Evolution
୛EL Electroluminescence
୛ESD Electrostatic Discharge
୛FPCB Flexible Printed Circuit Board
୛GMSK Gaussian Minimum Shift Keying
୛GPIB General Purpose Interface Bus
୛GPRS General Packet Radio Service
୛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
୛LGE LG Electronics
୛OPLL Offset Phase Locked Loop
୛PAM Power Amplifier Module
୛PCB Printed Circuit Board
୛PGA Programmable Gain Amplifier

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LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
1. INTRODUCTION
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Copyright ཱྀ2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Onl
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୛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
୛VCTCXO Voltage Control Temperature Compensated Crystal Oscillator
୛WAP Wireless Application Protocol
୛8PSK 8 Phase Shift Keying

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Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
2. PERFORMANCE
2. PERFORMANCE
2. Phone Information
2.1 HW Feature
Model Name LG-S310 ( Bar )
Dimensions 114 x 48.4 x 10.5Size
Weight (w/ Battery) 86g
Network EDGE,GSM Quad 850/900/1800/1900
BB(ARM9 208MHz) MT6235Chip Set
RF( Full EDGE) AD6546
MCP(Flash / RAM) 1G NAND/512 SDRAMMemory
Card Slot microSD, up to 4GB
TYPE TFTDisplay
Size 2.2 inch 176 x 220(QCIF)
Resolution 3M FF CMOSCAMERA
Flash NA
Bluetooth V2.1 with A2DPDATA
USB microUSB v2.0
ReceiverSound
Speaker 16 Φ / SPK Phone Support
LGIP-550N Li-ion 900mAh
Standby Time Over 290 hour @Period 5
BATTERY
Talk Time Over 3hours@GSM Tx Level 5
FM Wired + Wireless(w/o india )
SNS Facebook,Twitter,China Local
Messaging SMS, MMS, E-Mail
FEATURES
Web Brower WAP 2.0

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LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
2. PERFORMANCE
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2.2 RF Spec.
GSM850 EGSM900 DCS1800 PCS1900
Frequency [MHz]
Uplink/Downlink
824-849
869-894
880-915
925-960
1710-1785
1805-1880
1850-1910
1930-1990
Tx/Rx Spacing 45 MHz 45 MHz 95 MHz 80 MHz
Phase Error RMS 5° Peak : 20 °
Frequency Error 0.1 ppm 0.1ppm 0.1ppm 0.1ppm
EMC < -28dBm < -28dBm < -28dBm < -28dBm
Transmitter Output
Power
5dBm – 33dBm ± 3dB
5dBm – 33dBm ± 3dB
0dBm – 30dBm ± 3dB
0dBm – 30dBm ± 3dB
Transmitter Output
Power (EDGE)
5dBm – 26dBm ± 3dB
5dBm – 26dBm ± 3dB
4dBm – 26dBm ± 3dB
4dBm – 26dBm ± 3dB
Burst Timing <3.69us
Spectrum due to
modulation out to less
than 1800kHz offset
200kHz : -36dBm
600kHz : -51dBm/-56dBm
Spectrum due to
modulation out to
larger than 1800kHz
offset to the edge of
the transmit band
GSM :
1800-3000kHz :< -63dBc
(-46dBm)
3000kHz-6000kHz : <-65dBc
(-46dBm)
6000kHz < : < -71dBc
(-46dBm)
DCS :
1800-3000kHz :< -65dBc
(-51dBm)
6000kHz < : < -73dBc
(-51dBm)
Spectrum due to
switching transient
400kHz : -19dBm/-22dBm(5/0), -23dBm
600kHz : -21dBm/-24dBm(5/0), -26dBm
Reference Sensitivity –
TCH/FS Class II(RBER) : -105dBm(2.439%)
Usable receiver input
level range 0.012(-15 - -40dBm)
Intermodulation
rejection – Speech
channels
± 800kHz, ± 1600kHz : -98dBm/-96dBm (2.439%)
Timing Advance ± 0.5T

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Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
3. TECHNICAL BRIEF
3. TECHNICAL BRIEF
3.1 General Description
The LG-S310 supports GSM850, GSM-900, GSM-1800, and GSM-1900 based GSM/GPRS/EDGE.
RF Transceiver(AD6546) is a fully integrated Quad band GSM Transceiver with an advanced modulator design
that fully supports 8-PSK EDGE modulation format. The AD6546 contains a translation loop modulator for
directly modulating baseband signals onto an integrated Tx VCO.
[Figure 3.1-1] Block Diagram of RF part
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[Figure 3.1-1] Block Diagram of RF part