LG GS290 Service Manual

Service Manual Model : GS290

Internal Use Only

Service Manual

GS290

Date: March, 2010 / Issue 1.0

Table Of Contents

1. INTRODUCTION ................................................. 5

1.1 Purpose ............................................................................................... 5

1.2 Regulatory Information ............................................................... 5

1.3 Abbreviations ................................................................................... 7

2. PERFORMANCE ..................................................9

2.1 H/W Features .................................................................................... 9

2.2 Technical Specification ...............................................................11

3. TECHNICAL BRIEF ............................................17

3.1 GS290 Functional Block diagram ...........................................17

3.2 Baseband Processor (BBP) Introduction..............................18

3.3 Power management IC ..............................................................30

3.4. Power ON/OFF ..............................................................................35

3.5. SIM & uSD interface ....................................................................37

3.6. Memory ...........................................................................................39

3.7. LCD Display ....................................................................................40

3.8. Keypad Switching & Scanning ...............................................41

3.9. Keypad back-light illumination .............................................42

3.10. LCD back-light illumination ..................................................43

3.11. Audio ..............................................................................................44

4.5 Camera Trouble .............................................................................70

4.6 Receiver & Speaker trouble ......................................................72

4.7 Microphone trouble ....................................................................75

4.8 Vibrator trouble .............................................................................77

4.9 Keypad back light trouble .........................................................79

4.10 SIM & uSD trouble ......................................................................81

4.11 Touch trouble...............................................................................85

4.12 Trouble shooting of Receiver part .......................................87

4.13 Trouble shooting of Transmitter part. ................................93

5. DOWNLOAD & S/W UPGRADE......................101

6. BLOCK DIAGRAM ...........................................112

7. CIRCUIT DIAGRAM ........................................113

8. BGA Pin Map ..................................................121

9. PCB LAYOUT ...................................................129

10.ENGINEERING MODE ...................................135

10.1. Test Equipment Setup .......................................................... 135

10.2. Calibration Step ...................................................................... 135

3.13. charging circuit ..........................................................................46

3.14 FM radio & BLUETOOTH ..........................................................47

3.15. 5pin u-USB Interface connector..........................................51

3.16. General Description .................................................................54

3.17. Receiver part ...............................................................................56

3.18. Transmitter part .........................................................................57

3.19. RF synthesizer .............................................................................58

3.20. Front End Module control .....................................................59

3.21. Power Amplifier Module ........................................................60

3.22. PAM Schematic ..........................................................................61

4. TROUBLE SHOOTING ......................................62

4.1 Trouble shooting test setup .....................................................62

4.2 Power on Trouble ..........................................................................63

4.3 Charging trouble ..........................................................................66

4.4 LCD display trouble .....................................................................68

11. STAND ALONE TEST ....................................140

11.1 Test Program Setting ............................................................. 140

11.2 Tx Test ........................................................................................... 143

11.4 Rx Test ..........................................................................................145

12. EXPLODED VIEW & REPLACEMENT

PART LIST ....................................................147

12.1 EXPLODED VIEW ......................................................................147

12.2 Replacement Parts..................................................................149

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LGE Internal Use Only

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Only for training and service purposes

1. INTRODUCTION

GS290 Operational Description Revision B

1. Introduction

1.1. Purpose

This manual provides the information necessary to repair, calibration, description and download the features of
the GS290.

1.2. Regulatory Information

1.2.1. 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.

1.2.2. 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.

1.2.3. 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

GS290 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.

1.2.4. Maintenance Limitations

Maintenance limitations on the GS290 must be performed only at the LGE or its authorized agents.
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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LGE Internal Use Only

1. INTRODUCTION

GS290 Operational Description Revision B

1.2.5. Notice of Radiated Emissions

The GS290 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.

1.2.6. Pictures

The pictures in this manual are for illustrative purposes only; your actual hardware may look slightly
different.

1.2.7. Interference and Attenuation

An GS290 may interfere with sensitive laboratory equipment, medical equipment, etc. Interference
from unsuppressed engines or electric motors may cause problems.

1.2.8. Electrostatic Sensitive Devices

ATTENTION

Boards, which contains 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 such as EEPROM to the factory,
use the protective package as described.

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1. INTRODUCTION

GS290 Operational Description Revision B

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
୛ 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
୛ PLL Phase Locked Loop
୛ PSTN Public Switched Telephone Network
୛ RF Radio Frequency

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LGE Internal Use Only

1. INTRODUCTION

GS290 Operational Description Revision B

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
୛ 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
୛ 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

GS290 Operational Description Revision B

୛ 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 Controled Crystal Oscillator
୛ WAP Wireless Application Protocol

ଝ 8PSK 8 Phase Shift Keying

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2. PERFORMANCE

GS290 Operational Description Revision B

2. General Performance

2.1 H/W Feature

Item Feature Comment

Standard Battery Li-ion, 900mAh

AVG TCVR Current 250mA typ @PL5

Standby Current 2.3 mA typ @PP9

Talk time 3 hours (GSM TX Level 7)

Standby time Over 250 hours (Paging Period:9, RSSI: -85dBm)

Charging time Under 3 hours

RX Sensitivity

EGSM/GSM850:-105dBm˨ ,DCS/PCS:-105dBm˨

TX output power

EGSM/GSM850 : 33dBm (@PL 5)

DCS/PCS: 30dBm (@PL 0)

GPRS compatibility Class 10

SIM card type 3V Small

Display

Main 240 u 400 pixels, 3” WQVGA, 262K color

Status Indicator

Send Key, Shortcut Key, Volume Up/Down Key,
PWR Key, Camera Key, Lock Key

ANT Built in antenna

EAR Phone Jack 3.5Pi Headset jack

PC Synchronization Yes

Speech coding HR/EFR/FR/AMR

Data and Fax Yes

Vibrator Yes

Buzzer No

Voice Recoding Yes

C-Mic Yes

Receiver Yes

Travel Adapter Yes

Options Bluetooth hands-free kit, Data Kit

2. PERFORMANCE

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2. PERFORMANCE

GS290 Operational Description Revision B

2.2 Technical specification

Item Description Specification

1

Frequency Band

GSM850

TX: 824 + 0.2 x n MHz
RX: 869 + 0.2 x n MHz ( n = 1 ~ 124 )

EGSM

TX: 890 + 0.2 x (n-1024) MHz
RX: 935 + 0.2 x (n-1024) MHz ( n = 975 ~ 1023 )

DCS1800

TX: 1710 + ( n-511 ) u 0.2 MHz (n = 512 a 885)

RX: TX + 95 MHz

PCS1900

2

Phase Error

RMS < 5 degrees
Peak < 20 degrees

3

Frequency Error < 0.1ppm

GSM850/EGSM

Level Power Toler. Level Power Toler.

5 33 dBm ±2dB 13 17 dBm ±3dB

6 31 dBm ±3dB 14 15 dBm ±3dB

7 29 dBm ±3dB 15 13 dBm ±3dB

8 27 dBm ±3dB 16 11 dBm ±5dB

9 25 dBm ±3dB 17 9 dBm ±5dB

10 23 dBm ±3dB 18 7 dBm ±5dB

11 21 dBm ±3dB 19 5 dBm ±5dB

12 19 dBm ±3dB

DCS1800/PCS1900

Level Power Toler. Level Power Toler.

0 30 dBm ±2dB 8 14 dBm ±3dB

1 28 dBm ±3dB 9 12 dBm ±4dB

2 26 dBm ±3dB 10 10 dBm ±4dB

3 24 dBm ±3dB 11 8 dBm ±4dB

4 22 dBm ±3dB 12 6 dBm ±4dB

5 20 dBm ±3dB 13 4 dBm ±4dB

6 18 dBm ±3dB 14 2 dBm ±5dB

4

Power Level

7 16 dBm ±3dB 15 0 dBm ±5dB

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GSM850/EGSM

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

DCS1800/PCS1900

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

5

Output RF Spectrum
(due to modulation)

6,000 -73

GSM850/EGSM

Offset from Carrier (kHz) Max. (dBm)

400 -19

600 -21

1,200 -21

1,800 -24

DCS1800/PCS1900

Offset from Carrier (kHz) Max. (dBm)

400 -22

600 -24

1,200 -24

6

Output RF Spectrum
(due to switching
transient)

1,800 -27

2. PERFORMANCE

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2. PERFORMANCE

7 Spurious Emissions

Conduction, Emission Status

Conduction, Emission Status

8

Bit Error Ratio

GSM850 / EGSM

BER (Class II) < 2.439% @-102dBm

DCS1800/PCS1900

BER (Class II) < 2.439% @-100dBm

9

Rx Level Report
accuracy

r 3 dB

10 SLR

8 r 3 dB

Frequency (Hz) Max.(dB) Min.(dB)

100 -12 /

200 0 /

300 0 -12

1,000 0 -6

2,000 4 -6

3,000 4 -6

3,400 4 -9

11

Sending Response

4,000 0 /

12 RLR

2 r 3 dB

Frequency (Hz) Max.(dB) Min.(dB)

100 -12 /

200 0 /

300 2 -7

500 * -5

1,000 0 -5

3,000 2 -5

3,400 2 -10

4,000 2

13 Receiving Response

* Mean that Adopt a straight line in between 300 Hz and 1,000 Hz to be
Max. level in the range.

14 STMR

13 r 5 dB

15 Stability Margin > 6 dB

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dB to ARL (dB) Level Ratio (dB)

-35 17.5

-30 22.5

-20 30.7

-10 33.3

0 33.7

7 31.7

16

Distortion

10 25.5

17

Side tone Distortion Three stage distortion < 10%

18

<Change> System
frequency (26 MHz)
tolerance

d 2.5 ppm

19

<Change>32.768KHz
tolerance

d 30ppm

20

Power consumption

Standby

- Normalஆd 3 mA(@PP9)

21

Talk Time

EGSM/Lvl 7 (Battery Capacity 800mA):180 min

EGSM/Lvl12(Battery Capacity 800 mA):320min

22

Standby Time

Under conditions, at least 300 hours:

1. Brand new and full 900mAh battery

2. Full charge, no receive/send and keep GSM in idle mode.

3. Broadcast set off.

4. Signal strength display set at 3 level above.

5. Backlight of phone set off.

23

Ringer Volume

At least 65 dB under below conditions:

1. Ringer set as ringer.

2. Test distance set as 50 cm

24

Charge Current

Fast Charge : < 650 mA

Slow Charge: < 120 mA

2. PERFORMANCE

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2. PERFORMANCE

Antenna Bar Number Power

7

>-92 dBm a

5

-97dBm a –93dBm

4

-100dBm a
–98dBm

2

-103dBm a
–101dBm

1

-105dBm a
–104dBm

0 < –106 dBm

25

Antenna Display

Off No Service

Battery Bar Number Voltage (±0.05V)

3 3.72V~4.2V

2 3.65V~3.71V

1 3.59V~3.64V

26 Battery Indicator

0 3.35V~3.58V

3.59VĻ±0.05V (Call)

27 Low Voltage Warning

3.59VĻ±0.05V (Standby)

28

Forced shut down
Voltage

3.35 r 0.05 V

29

Battery Type

Li-ion Battery

Standard Voltage = 3.7 V

Battery full charge voltage = 4.2 V

Capacity: 900mAh

30

Travel Charger

Switching-mode charger

Input: 150 a 240 V, 50/60Hz

Out put: 5.1, 0.7A

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2. PERFORMANCE

GS290 Operational Description Revision B

* EDGE RF Specification (Option: is not serviced for ”EDGE mode”)

Item Description Specification

1 RMS EVM ≤9%

2 Peak EVM ≤30%

3 95th Percentile EVM ≤15%

4 Origin Offset Suppression ≥30dB

GSM900/EGSM

Level Power Toler. Level Power Toler.

5 27dBm ±3dB 13 17dBm ±3dB

6 27dBm ±3dB 14 15dBm ±3dB

7 27dBm ±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

DCS1800, PCS1900

Level Power Toler. Level Power Toler.

0 26/25dBm ±3dB 8 14dBm ±3dB

1 26/25dBm ±3dB 9 12dBm ±4dB

2 26/25dBm ±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

5 Power Level

7 16dBm ±3dB 15 0dBm ±5dB

GSM900/EGSM

Offset from carrier(kHz) Max. dBc

100 +0.5

200 -30

250 -33

400 -54

600~<1,200 -60

1,200~<1,800 -60

1,800~<3,000 -63

3,000~<6,000 -65

6

Output RF Spectrum
(due to modulation)

6,000 -71

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LGE Internal Use Only

2. PERFORMANCE

GS290 Operational Description Revision B

DCS1800, PCS1900

Offset from carrier(kHz) Max. dBc

100 +0.5

200 -30

250 -33

400 -54

600~<1,200 -60

1,200~<1,800 -60

1,800~<3,000 -63

3,000~<6,000 -65

6,000 -71

GSM900/EGSM

Offset from carrier(kHz) Max. dBm

400 -23

600 -26

1,200 -27

1,800 -30

DCS1800, PCS1900

Offset from carrier(kHz) Max. dBm

400 -23

600 -26

1,200 -27

7

Output RF Spectrum
(due to switching transient)

1,800 -30

6

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3. TECHNICAL BRIEF

GS290 Operational Description Revision B

3. Technical brief

3.1. GS290 Functional Block diagram.

The functional component arrangement is mentioned below diagram.

Figure 1 GS290 Functional block diagram

3. TECHNICAL BRIEF

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3. TECHNICAL BRIEF

GS290 Operational Description Revision B

3.2. Baseband Processor (BBP) Introduction

S-GOLD3 Baseband IC

PMB 8877

S-GOLD3 Overview

TM

is a GSM/EDGE single chip mixed signal baseband IC containing all analog and digital functionality

TM

provides multimedia extensions to enable today’s and future feature

TM

supports multislot operation modes

TM

is handled by an ARM926EJ-S CPU and a TEAKLite® DSP core.

TM

Quad-Band E-GPRS Solution

SMARTiPM

PMB 6272

(EDG E GSM/GPR S RF Tran sceiver)

TEAKL ite®

GEA-1/2/3

SRA M

USB FS

OTG

DMA C

GPIO s

USIM

GPTU

RTC

Equali zer

Acc.

I²S / DAI

GSM

Timer

Keyp ad

AFC

CAPCO M

IC U

SPCU

AUX

ADC

SRC

MEM

CTRL

SDIO I F

I²C

CGU

Display

IF

Camera

IF

FCDP

Multi media I C IF

ARM® 926 EJ-S

MOVE CoPro
Fast
IrDA

USIFs

Cryp to

box

TSMU

I²S

Sys

Timer

1 Wire

Engi ne

2D

MMC IF

Channel
Deco der

BB Receiver

Modu lator

8 PSK/GMSK

JTAG

Cerb erusABW

S-GOLD3

PMB 8877

IR-Memory

DAC

ADC

Audio FE

DAC

DSP

Timer

DSP

ICU

DSP
ICU

ADC

I/Q

DA C

Ph/

Am p

SD

PLL

IF

AD C

3 WIRE

IF

RF

Control IF

GSM

Cipher Unit

3-wire- bus

Analog
Audio In

Analog
Audio Out

SDs

SM-Power3

PMB 6821

USB

AU DIO

AMPL IFIER

BA CK LIGHT

I²C

DI GITA L

CO NTR OL

CH AR GER

DI G. R ESET

& SLEEP

CO NTR OL

VRF sVAU DIO s

VMMCVUSB

VSIMVRT C

VVIBVAU X

VAF C

SU

VIOVPLL

REF ERENC E

PA

FEM

DC XO

Core supply (0.95 V,1 .37V)
Analog Supply(2.5V)
VRTC, VPLL, IO Supply

1.8V, 2.5V

LD Os

FLA SH

LIG HT

SDR or D DR

SD-R AM

/ C -RA M

NO R / NAN D

FLA SH

1 32

4 65

7 98

* #0

SIM

MMC

GS290 Operational Description Revision B

3.2. Baseband Processor (BBP) Introduction

Figure 2 Top level block diagram of the S-GOLD3TM (PMB8877)

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3. TECHNICAL BRIEF

GS290 Operational Description Revision B

3.2.1. General Description

S-GOLD3TM is a GSM/EDGE single chip mixed signal Baseband IC containing all analog and digital functionality
of a cellular radio. Additionally S-GOLD3TM Provides multimedia extensions such as camera, software MIDI, MP3
sound. It is designed as a single chip solution, integrating the digital and mixed signal portions of the base
band in 0.09um, 1.2V technology.

The chip will fully support the FR, EFR, HR and AMR-NB vocoding.

S-GOLD3

TM

support multi-slot operation modes HSCSD (up to class 10), GPRS for high speed data application

(up to class 12) and EGPRS (up to class 12) without additional external hardware.

3.2.2. Block Description

z Processing core

ARM926EJ-S 32 bit processor core for controller functions. The ARM926EJ-S includes an MMU, and the Jazelle
Java extension for Java acceleration.

- TEAKLite DSP core

z ARM-Memory

- 32k Byte Boot ROM on the AHB

- 96k Byte SRAM on the AHB, flexibly usable as program or data RAM

- 16k Byte Cache for Program (internal)

- 8k Byte tightly coupled memory for Program(internal)

- 8k Byte Cache for Data(internal)

- 8k Byte tightly coupled memory for Data(internal)

z DSP-Memory

- 104K x 16bit Program ROM

- 8k x 16bit Program RAM

- 60k x 16bit Data ROM

- 37k x 16bit Data RAM

- Incremental Redundancy(IR) Memory of 35904 words of 16bit

z Shared Memory Block

1.5K x 32bit Shared RAM(dual ported) between controller system and TEAKLite.

z Controller Bus system

The processor cores and their peripherals are connected by powerful buses.

Multi-layer AHB for connecting the ARM and the other master capable building blocks with the internal and
external memories and with the peripheral buses.

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3. TECHNICAL BRIEF

GS290 Operational Description Revision B

z Clock system

The clock system allows widely independent selection of frequencies for the essential parts of the S-GOLD3.
Thus power consumption and performance can be optimized for each application.

z Functional Hardware block

- CPU and DSP Timers

- MOVE coprocessor performing motion estimation for video encoding algorithms
(H.263, MPEG-4)

- Programmable PLL with additional phase shifters for system clock generation

- GSM Timer Module that off-loads the CPU from radio channel timing

- GMSK / 8-PSK Modulator according to GSM-standard 05.04 (5/2000)

- GMSK Modulator: gauss-filter with B*T=0.3

- EDGE Modulator: 8PSK-modulation with linearized GMSK-Pulse-Filter

- Hardware accelerators for equalizer and channel decoding.

- Incremental Redundancy memory for EDGE class 12 support

- A5/1, A5/2, A5/3 Cipher unit

- GEA1, GEA2, GEA3 Cipher Unit to support GPRS data transmission

- Advanced static and dynamic power management features including TDMA-Frame

synchronous low power mode and enhanced CPU modes(idle and sleep modes)

- Pulse Number Modulation output for Automatic Frequency Correction(AFC)

- Serial RF Control interface: support of direct conversion RF

- A Universal Serial Interface(USIF) enabling asynchronous (UART) of synchronous (SPI)
serial data transmission

- 3 USIF with autobaud detection, hardware flow control and integrated

- A dedicated Fas IfDA Controller supporting IrDA’s SIR,MIR and FIR standards

(up to 4Mbps)

- I2C-bus interface (e.g. connection to S/M power)

- A fast display interface supporting serial and parallel interconnection

- An ITU-R BT.656 compatible Camera interface.

- Programmable clock output for a camera

- An multimedia/Secure Digital Card Interface (MMCI/SD:SDIO capable)

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3. TECHNICAL BRIEF

GS290 Operational Description Revision B

3.2.3. External Devices connected to memory interface

Table 1. Memory interface

Device Name Maker Remark

FLASH K522H1HACB-B060 SAMSUNG Synchronous / A synchronous

DDR K522H1HACB-B060 SAMSUNG Synchronous 166MHz

LCD IM300IBN1A LGIT 8bit access 2 times transmission

Melody IC Not Used S/W Infineon Software CODEC

3.2.4. RF Interface (T_OUT)

S-Gold3 uses this interface to control RF IC and Peripherals. 13 signals are provided switch on/off RF ICs
Periodically each TDMA frame.

Table 2. RF Interface Spec.

T_OUT

Resource Interconnection Description

T_OUT0 TXON_PA PAM Power on

T_OUT1 N/A N/A

T_OUT2 PA_BAND TX RF band select

T_OUT3 N/A N/A

T_OUT4 N/A N/A

T_OUT5 Other function -

T_OUT6 PA MODE PAM Mode select

3.2.5. USIF Interface

GS290 have three USIF Drivers as follow :

- USIF1 : Hardware Flow Control / SW upgrade / Calibration

- USIF2 : Not used Rx, Tx and CTS, RTS use BT Interface

- USIF3 : BT Interface

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3. TECHNICAL BRIEF

GS290 Operational Description Revision B

Table 3. USIF Interface Spec.

3.2.6. ADC channel

BBP ADC block is composed of 10 external ADC channel. This block operates charging process and other
related process by reading battery voltage and other analog values.

Table 4. S-Gold3 ADC channel usage

ADC channel

Resource Interconnection Description

M0 BAT_ID Battery temperature measure

M1 RF_TEMP RF block temperature measure

M2 N.C

M3 N.C

M4 N.C
M5 N.C

M6 N.C

M7 N.C

M8 VSUPPLY Battery supply voltage measure

M9 N.C

M10 N.C

Resource Name Remark
USIF1

USIF1_TXD TXD Transmit Data
USIF1_RXD RXD Receive Data
USIF1_CTS USB_DP
USIF1_RTS USB_DM
USIF2
USIF2_TXD NC NC
USIF2_RXD Other function ­USIF2_CTS BT_CTS
USIF2_RTS BT_RTS.
USIF3
USIF3_TXD BT_TX BT Transmit tx
USIF3_RXD BT_RX BT Receive rx

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Only for training and service purposes

3. TECHNICAL BRIEF

GS290 Operational Description Revision B

3.2.7. GPIO map

Over a hundred allowable resources, GS290 is using as follows except dedicated to SIM and Memory. GS290
GPIO(General Purpose Input/Output) Map, describing application, I/O state, and enable level, is shown in below
table

GS290 Operational Description Revision B

3.2.7. GPIO map

Over a hundred allowable resources, GS290 is using as follows except dedicated to SIM and Memory. GS290
GPIO(General Purpose Input/Output) Map, describing application, I/O state, and enable level, is shown in below
table

Table 5 S-Gold3 GPIO pin Map

Port Function Net Name Description

KEY MATRIX

KP_IN0

KP_IN1

KP_IN2

KP_IN3

KP_IN(3)

KP_IN4

KP_IN5

KP_IN(5)

KP_IN6

KP_IN(6)

KP_OUT0

BT_HOST_WAKEUP

KP_OUT1

KP_OUT(0)

KP_OUT2

KP_OUT(2)

KP_OUT3

KP_OUT(3)

USIF1

USIF1_RXD

UART_RX UART, RS232 Data

USIF1_TXD

UART_TX UART, RS232 Data

USIF1_RTS_N

USB_DAT_VP USB Data

USIF1_CTS_N

USB_SE0_VM USB Data

USIF2

USIF2 _RXD

USW_INT MUIC Interrupt Singnal

USIF2 _TXD

NA Not used

USIF2_RTS_N

UART_BT_RTS Bluetooth RTS

USIF2_CTS_N

UART_BT_CTS Bluetooth CTS

USIF3

USIF3 _RXD

UART_BT_RX Bluetooth RX

USIF3 _TXD

UART_BT_TX Bluetooth TX

CLK

CLK32K

CLK32k For FM Radio, BT CLK32K

GPIO_22

Not used

CAMERA I/F

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LGE Internal Use Only

3. TECHNICAL BRIEF

GS290 Operational Description Revision B

CIF_D0

CIF_D(0) Camera DATA[0]

CIF_D1

CIF_D(1) Camera DATA[1]

CIF_D2

CIF_D(2) Camera DATA[2]

CIF_D3

CIF_D(3) Camera DATA[3]

CIF_D4

CIF_D(4) Camera DATA[4]

CIF_D5

CIF_D(5) Camera DATA[5]

CIF_D6

CIF_D(6) Camera DATA[6]

CIF_D7

CIF_D(7) Camera DATA[7]

CIF_PCLK

CIF_PCLK Camera pixel clock

CIF_HSYNC

CIF_HS Camera H sync

CIF_VSYNC

CIF_VS Camera V sync

CLKOUT

CIF_MCLK Camera main clock

CIF_PD

CIF_PD Camera power down(active high)

CIF_RESET

CIF_RESET Camera reset

LCD I/F

DIF_D0

DIF_D(0) LCD data[0]

DIF_D1

DIF_D(1) LCD data[1]

DIF_D2

DIF_D(2) LCD data[2]

DIF_D3

DIF_D(3) LCD data[3]

DIF_D4

DIF_D(4) LCD data[4]

DIF_D5

DIF_D(5) LCD data[5]

DIF_D6

DIF_D(6) LCD data[6]

DIF_D7

DIF_D(7) LCD data[7]

DIF_D8

DIF_D(8) LCD data[8]

DIF_CS1

DIF_MAIN_CS MAIN LCD chip select

DIF_CS2

IF_MODE LCD Interface mode

DIF_CD

DIF_CD Command Data switch

DIF_WR

DIF_WR LCD Write

EINT7

HOOK_DETECT Ear-Mic hook detection

DIF_RESET1

_DIF_RESET LCD Reset

GPIO_108

VIB_EN Vibrator enable

I2C

I2C_SCL

I2C_SCL For PMIC/Amp/Touch/MUIC

I2C_SDA

I2C_SDA For PMIC/Amp/Touch/MUIC

PM_INT (EINT)

PM_INT

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3. TECHNICAL BRIEF

GS290 Operational Description Revision B

SIM I/F

CC_IO

SIM_IO SIM CARD I/O

CC_CLK

SIM_CLK SIM CARD CLOCK

CC_RST

SIM_RST SIM CARD RESET

I2S2

I2S2_CLK0

Not used

GPIO_102

LCD ID LCO Bender Check

I2S2_RX

Not used

I2S2_TX

Not used

I2S2_WA0

Not used

GPIO_103

Not used

External Memory

MMCI_CMD

TF_CMD T-flash

MMCI_DAT[0]

TF_DAT0 T-flash

MMCI_CLK

TF_CLK T-flash

GPIO_109

CAM_LDO_EN Camera Power LDO Control

IrDA

GPIO_110

GPIO_109

I2S1

I2S1_CLK0

BT_PCM_CLK For Bluetooth

I2S1_CLK1

MMC_DETECT T-flash Detect

I2S1_RX

I2S1_RX For Bluetooth

I2S1_TX

I2S1_TX For Bluetooth

I2S1_WA0

I2S1_WA For Bluetooth

External Memory

MMCI_DAT[1]

TF_DAT1 T-flash

MMCI_DAT[2]

TF_DAT2 T-flash

MMCI_DAT[3]

TF_DAT3 T-flash

Audio I/F

EPN1

EAR_N For Receiver

EPP1

EAR_P For Receiver

EPPA1

BBP_SND_L For Speaker

EPREF

Reference

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LGE Internal Use Only

3. TECHNICAL BRIEF

GS290 Operational Description Revision B

EPPA2

BBP_SND_R For Speaker

MICN1

MIC1_N For Mic

MICP1

MIC1_P For Mic

MICN2

MIC2_N For Headset Mic

MICP2

MIC2_P For Headset Mic

VMICP

VMICP Power for MIC

VMICN

VMICN Power for MIC

ADC

M0

BAT_ID Battery temperature measure

M1

RF_TEMP RF block temperature measure

M2

M3

M7

M8

VSUPPLY Battery supply voltage measure

M9

M10

Reference

VREF

IREF

JTAG I/F

TDO

TDO JTAG

TDI

TDI JTAG

TMS

TMS JTAG

TCK

TCK JTAG

TRST_n

_TRST JTAG

RTCK

RTCK JTAG

ETM I/F

TRIG_IN

TRIG_IN ETM (Embedded Trace Macro Cell)

MON1

MON1 ETM

MON2

MON2 ETM

TRACESYNC

TRACESYNC ETM

TRACECLK

TRACECLK ETM

PIPESTAT[2]

PIPESTAT2 ETM

PIPESTAT[1]

PIPESTAT1 ETM

PIPESTAT[0]

PIPESTAT0 ETM

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Only for training and service purposes

3. TECHNICAL BRIEF

GS290 Operational Description Revision B

TRACEPKT[0]

TRACEPKT(0) ETM

TRACEPKT[1]

TRACEPKT(1) ETM

TRACEPKT[2]

TRACEPKT(2) ETM

TRACEPKT[3]

TRACEPKT(3) ETM

TRACEPKT[4]

TRACEPKT(4) ETM

TRACEPKT[5]

TRACEPKT(5) ETM

TRACEPKT[6]

TRACEPKT(6) ETM

TRACEPKT[7]

TRACEPKT(7) ETM

Memory

MEM_AD[0]

DATA(0)

MEM _AD[1]

DATA (1)

MEM _AD[2]

DATA (2)

MEM _AD[3]

DATA D(3)

MEM _AD[4]

DATA (4)

MEM _AD[5]

DATA (5)

MEM _AD[6]

DATA (6)

MEM _AD[7]

DATA (7)

MEM _AD[8]

DATA (8)

MEM _AD[9]

DATA (9)

MEM _AD[10]

DATA (10)

MEM _AD[11]

DATA (11)

MEM _AD[12]

DATA (12)

MEM _AD[13]

DATA (13)

MEM _AD[14]

DATA (14)

MEM _AD[15]

DATA (15)

MEM _WR_n

_WR

MEM _RD_n

_RD

MEM _BC0_n

_BC0

MEM _BC1_n

_BC1

MEM _A[0]

ADD(0)

MEM _A[1]

ADD (1)

MEM _A[2]

ADD (2)

MEM _A[3]

ADD (3)

MEM _A[4]

ADD (4)

MEM _A[5]

ADD (5)

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LGE Internal Use Only

3. TECHNICAL BRIEF

GS290 Operational Description Revision B

MEM _A[6]

ADD (6)

MEM _A[7]

ADD (7)

MEM _A[8]

ADD (8)

MEM _A[9]

ADD (9)

MEM _A[10]

ADD (10)

MEM _A[11]

ADD (11)

MEM _A[12]

ADD (12)

MEM _A[13]

ADD (13)

MEM _A[14]

ADD (14)

MEM _A[15]

ADD (15)

MEM _A[16]

ADD (16)

MEM _A[17]

ADD (17)

MEM _A[18]

ADD (18)

MEM _A[19]

ADD (19)

MEM _A[20]

ADD (20)

MEM _A[21]

ADD (21)

MEM _A[22]

ADD (22)

MEM _A[23]

ADD (23)

MEM _A[24]

ADD (24)

MEM_A[25] ADD(25)

MEM_A[26] ADD(26)

MEM_CSA0_n ADD(27)

MEM_CSA1_n ADD(28)

MEM_CSA2_n ADD(29)

MEM _RAS_n

_RAS

MEM _CAS_n

_CAS

MEM _WAIT_n

_WAIT

MEM _SDCLKO

SDCLKO For Burst mode

MEM _SDCLKI

SDCLKI For Burst mode

MEM _BFCLKO

BFCLKO For Burst mode

MEM _BFCLKI

BFCLKI For Burst mode

MEM _CKE

CKE

Memory

FCDP_RBn

FCDP

TDMA I/F

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Only for training and service purposes

3. TECHNICAL BRIEF

GS290 Operational Description Revision B

T_OUT0

TXON_PA PAM

GPIO_108

VIB_EN

T_OUT2

PA_BAND PAM

T_OUT3

FE1

T_OUT4

BT_WAKEUP

T_OUT5

LIN_PWM_MAG

T_OUT6

PA_MODE PAM

T_OUT7

LIN_PWM_FRQ

CC1CC7IO

JACK_DETECT

GPIO_52

LCD_BACKLIGHT LCD Backlight control

GPIO_102

LCD_ID LCD ID check

GPIO_54

RF I/F

RF_STR0

RF_EN

CC1CC5IO

_PPR For Charger

RF_DATA

RF_DA

RF_CLK

RF_CLK

System Port

AFC

AFC

CLKOUT0 [<=26MHz]

Not used

F26M

26MHZ_MCLK 26M Main Clock

F32K

to 32k crystal

OSC32K

to 32k crystal

RESET_n

_RESET

TRIG_OUT

TRIG_OUT

RTC_OUT

RTC_OUT

VCXO_EN

VCXO_EN

DSP

GPIO_61

GPIO_62

GPIO_63

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LGE Internal Use Only

3. TECHNICAL BRIEF

GS290 Operational Description Revision B

3.3. Power management IC

3.3.1. General Description

SM-POWER is a highly integrated Power and Battery Management IC for mobile handsets. It has been specially
designed for usage with S-Gold3. Although optimized for usage with the Infineon S-GOLD baseband device it
is suitable for the S-GOLDlite and the E-GOLD+ baseband devices as well. It also supports the cellular RF
devices like SMARTi-DC, SMARTi-DC+, SMARTi-SD and the Bluemoon Single, Infineon’s single chip solution for
Bluetooth. If used with S-GOLD3 it provides all power supply functions (except for the RF PA) for a complete
advanced GSM Edge smart phone minimizing external device count.

Block Description

• Highly efficient step-down converter for main digital baseband supply including Core, DSP and
memory interface (External Bus Unit).

• Support of S-GOLD standby power-down concept

• Low-drop-out (LDO) regulators for Flash and mobile RAM memory devices

• Voltage independent switching of two SIM cards

• LDO regulators for baseband I/O supply

• LDO regulator for analog mixed-signal section of S-GOLD

• Low-noise LDO regulators for RF devices

• Supply for Bluemoon Single, Infineon’s single chip solution for Bluetooth

• Audio amplifier 8 Ohms for handsfree operation and ringing

• Charge Control for charging Li-Ion/Polymer batteries under software control

• Pre-charge current generator with selectable current level

• RTC regulator with ultra-low quiescent current

• USB interface support for peripheral and mini-host mode

• Backlight LEDs driver with current selection and PWM dimming function

• Two single LED driver outputs for signaling

• Vibrator driver with adjustable voltage

• Fully controlable by software via I2C – Bus

• Temperature and battery voltage sensors

• Interrupt channels for peripherals

• System debug mode

• VQFN 48 package with heat sink and non-protruding leads

• Compatible with the Infineon E-GOLD+ V2 and V3

LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved.

- 30 -

Only for training and service purposes

3. TECHNICAL BRIEF

GS290 Operational Description Revision B

SM-POWER is a further step on the successful E-Power product line with enhanced and optimized functionality.

SM-POWER features a baseband supply concept with a DC/DC step-down converter cascaded by two linear
regulators

–SM-POWER’s DC/DC converter makes up to 40 % reduction of battery current for smart phone functions (e.g.

organizer functions, games, MP3 decoding) possible.

– SDBB has high efficiency up to 95% and also a power save mode.

– Memory Interface is directly supported by the SDBB

– SDBB can also act as main supply voltage for E-GOLD+ or S-GOLDlite baseband devices.

– For S-GOLD two linear regulators for DSP and Core are cascaded after the SDBB.

SM-POWER supports the standby power-down concept of S-GOLD by temporarily switching off the linear
regulator for the DSP during mobile standby whenever this subsystem is not used. In this phase the ARM
controller and most peripherals including parts of the on-chip SRAM are kept powered-up with power being
supplied by the other linear regulator.

SM-POWER includes a fully differential audio amplifier able to drive loads down to a nominal value of 8 Ohm for
usage in hands-free phones and for ringing

– 450 mW maximum output power

– adjustable gain

– mute switch SM-POWER also integrates a charging function for Li-Ion, Li-Polymer batteries

– click and pop -protection SM-POWER also integrates a charging function for Li-Ion, Li-Polymer batteries

– Precharge current source with two current levels

– Constant current / constant voltage charging with 3 different termination voltages

– Programable charge current limitation for use with different batteries

– Freely programable pulse charging to reduce the thermal power dissipation in the constant voltage

charging phase

– Top-off charge current sensing SM-POWER completes the USB interface of S-GOLD

– Regulated voltage for S-GOLD USB interface including reverse current and overvoltage protection

– Switch to supply USB pull-up resistor

– Mini-host pull down resistor functionality

– Charge pump with internal switching capacitor for USB host VBUS supply voltage SM-POWER fully supports

LED and Vibra Motor functionality

– no external components needed

– driver for backlight LEDs adjustable in steps up to 140mA and with soft turn on and off by PWM dimming

– two driver outputs for single LEDs for precharge indication and signaling with i.e. change of colour

Copyright © 2010 LG Electronics. Inc. All right reserved.
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LGE Internal Use Only

3. TECHNICAL BRIEF

GS290 Operational Description Revision B

–driver for Vibra Motor with adjustable voltages, soft startup / shutdown and current limitation

SM-POWER offers several control functions

– Power-on Reset Generator with logic state machine

– I2C bus interface

– I2C bus configurable mode control logic with ON (push-button or RTC), VCXOEN and LRF3EN (wake-up by

Bluetooth) inputs

– Programable interrupt channels to handle peripherals like SIM, MMC and USB

– Monitoring of charging functions

– Undervoltage Shut-Down

– Errorflags (volatile or non-volatile) from many power-supply functions and thermal sensor in order to debug

system

– Overtemperature Shut-Down

– Overtemperature Warning

– Support of S-GOLD standby power-down concept

– Support of S-GOLD Power-Down Pad Tristate Function

Table 6. LDO Output Table of SM-Power

LDO Net name Output Voltage Output Current Usage
SD1 1V35_Core 1.35V 600mA Core & for LDO

SD2 1V8_SD 1.8V 300mA Memory
VAUX 2V9_VAF 2.9V 100mA Cam Auto Focus
VIO 2V62_VIO 2.62V 100mA Peripherals
VSIM 2V9_SIM 2.9V 70mA SIM card
VMME 2V8_VMME 2.9V 150mA u-SD
VUMTS 2V85_AMP 2.85V 110mA Headset AMP
VUSB VUSB 3.1V 40mA VUSB
VLED VLED 2.9V 10mA Not used
VAUDIOa 2V5_VAUDA 2.5V 200mA Stereo headset, Mono earpiece
VAUDIOb 2V5_VAUDB 2.5V 50mA Analog parts of S-Gold

VRF1 2V85_VRF 2.85V 150mA

2.85 V supply for SMARTi-PM
RF transceiver

VRF2 1V5_VRF 1,53V 100mA

1.5 V supply for SMARTi-PM

RF transceiver
VRF3 2V65_VBT 2.7V 150mA Bluetooth
VPLL 1V35_VPLL 1.35V 30mA S-GOLD3 PLL
VRTC 2V11_RTC 2.11V 4mA Real Time Clock
VAFC VAFC 2.65V 5mA Not used
VVIB 2V8_VLCD 2.8V 140mA LCD

GS290 Operational Description Revision B

–driver for Vibra Motor with adjustable voltages, soft startup / shutdown and current limitation

SM-POWER offers several control functions

– Power-on Reset Generator with logic state machine

– I2C bus interface

– I2C bus configurable mode control logic with ON (push-button or RTC), VCXOEN and LRF3EN (wake-up by

Bluetooth) inputs

– Programable interrupt channels to handle peripherals like SIM, MMC and USB

– Monitoring of charging functions

– Undervoltage Shut-Down

– Errorflags (volatile or non-volatile) from many power-supply functions and thermal sensor in order to debug

system

– Overtemperature Shut-Down

– Overtemperature Warning

– Support of S-GOLD standby power-down concept

– Support of S-GOLD Power-Down Pad Tristate Function

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- 32 -

Only for training and service purposes

3. TECHNICAL BRIEF

GS290 Operational Description Revision B

Fi

Figure 3. SM-Power Circuit Diagram of GS290

22u

C234

0.1u

C204

C200
1u

u2.
2

1
0
2C

VAUDA_2V5

C202

2.2u

SD_1V8

u01

0
0
2L

VBAT

302C u1

0.1u

C214

VFM_2V9

1u

C2051uC207

VRF_1V5

10u

L201

10u

C208

2.2u

C209

VPLL_1V35

u1112C

VBAT

CORE_1V35 CAM_A_2V8

U202

PMB6821

4H

8H9D6J

7H6H5H

9G8G7G6G5G4G3G9F8F

7F6F5F4F3F9E

8
E

7E

6E

5E

4E8D7D6D5D4D

6C

L2

L10K2

J10K1

K11

J3

J11H3

H9J2

J1

H10

H1

H11H2

G10G1

G2

G11

F11F1

F10F2

E11E1

E10E2

D1

D11E3

D10

D2

C10C1

C11D3

C2

B1

11L

8A

9J

01K

9L

9K8L8K

7L

8J7K6L

7J6K5K5J5L4L4K3L3K

4J1A4B

11B

1L

11A

9B

01A

0
1B9C9A

8C8B6A7C7A5A7B

5C6B5B4A4C

3A

3B3C2A

2B

MV_0ES

PV_TAD

-CA
+CA

DNEPSUS

N_EO

BSUV

BSU_DDV

P
NI_

O
NOM

NNI_ONOM

ONOM_DDV

M_XEFE

RV

P
TUO_ONO

M

ONOM_SSV

N
TUO_ONO

M

FERR

FERV

KN
I
HS_HSALF

NO_HSALF

APNOXT

LLPV

OILLPDDV

O
IV

2DSV

3SMUP

2SMUP

1SMUP

TROPTUO

NO_REWOP

GODW

1FFO_NO

2FFO_NO

TUO_FFO_NO

LTRC_ECRUOSER

TNI_C2I

TAD_C2I

KLC_C2I

MWP_1LB

MWP_2LB

MWP_3LB

LRTNC_HC

ECRUOS_HC

CU_EGRAHC

EGRAHC_DDV

1NI_ESNES

2NI_ESNES

FER_DDV

DELV

1DSV

RCV

VPIN

VMIN VMME

D+ VDDMME

D-

VDDRF2

RESET_N VRF2

RESET2_N

SLEEP1_N VRF3

SLEEP2_N VDDRF13_AFC

VAUDIOA VRF1

VDDAUDIOA VVIB

VDDSIMVIB

VDDAUDIOB

VAUDIOB VSIM

VAUX VAFC

VDDAUX

VRTC

SU1_GATE

SU1_GND VDDUMTS

SU1_FB VUMTS

SU1_ISENSE

VDDSD1

VDDSD2 SD1_FB

SD2_FB SD1_FBL

SD2_FBL

1SSV

2SSV

3SSV

4SSV

5SSV

6SSV

7SSV

8SSV

9SSV

01SSV

11SSV

21SSV

3
1SSV

41SSV

51SSV

61SSV

7
1SSV

81SSV

91SSV

02SSV

12SSV

22SSV

32SSV

42SSV

52SSV

62SSV

72SSV

82SSV

92SSV

03SSV

FERV_SSV

1DS_SSV

2DS_SSV

u1.0

7
1
2C

u01512C

612C

u01

VBAT

u1.0

3
32

C

CAM_2V85

402R

K7.4

1u

C219

C222

10u

1u

C223

522C

u01

312R

IND

R214

27K

VAUDB_2V5

C226

2.2u0.1u

C227

H-KTRE061SDK

002D

002PT

VBAT

512R K001

VIO_2V62

C228
1u

102PT

612R

K001

VSIM_2V9

2.2u

C229

VBAT

1u

C230

RTC_2V11

2.2u

C231

VBT_2V65

232C

u1

VRF_2V85 VMME_2V9

VBAT

1u

C235

FB201

A122S8

0

6

1

ZPM 0

2

2

2
0
2B

F

A122S8061ZPM

VUSB

1u

C236

1u

C237

2.2u

C238

SD_1V8

C239

2.2u

202PT

VBAT

C240

2.2u

VBAT

C241
1u

VBAT

K7.4

122R

K001

722R

H-KTRE061SDK

102D

USB_SE0_VM

NE_YEK

GODW

USB_OEN

VCXO_EN

TXON_PA

ADS_C2I

LCS_C2I

RTC_OUT

USB_DAT_VP

LRTC_ECRUOSER

USB_DP
USB_DM

RPWRON_EN

2FFO_NO

ON_OFF2

NORWP

TNI_REWOPS

LB_YEK

PMRSTN

FM_SPK_INN
FM_SPK_INP

FM_SPK_OUTP

FM_SPK_OUTN

BT_CLK_REQ

PMIC

K3.3

6
0
2R

SC200

21

GU073-5P-SD-E1500

CN200

15

13

11

9

7

5

4

3

2

1

14

12

10

8

6

BQ25040

U201

5 6

74

83

92

101

11

PGND

IN BAT

ISET _PG

VSS1 CHG

LDO VSS2

EN_SETIFULL

1u

C2101uC212

VIO_2V62

VIO_2V62

502R

IND

V_BUS

C220
22pDNI

C221

C224
1u

VBATVIO_2V62

V_BUS

K001

322R

0
2
8

702R

K001

422R

_CHG_EOC

_PPR

_CHG_EN

RPWRON_EN

USW_ID

USW_DP

USW_DM

Single Charging IC for uUSB

)%
1(

(645mA)

)%1

(

(105mA)

Micro USB

GS290 Operational Description Revision B

Fi

Figure 4 charging part

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

- 33 -

LGE Internal Use Only

3. TECHNICAL BRIEF

GS290 Operational Description Revision B

3.3.2. Charging

The bq25040 has a single power output that charges the battery. A system load can be placed in parallel with
the battery.The charge current is programmed using the ISET and EN/SET inputs. The charge current is
programmable to USB100, USB500 or a user programmed charge current up to 1.2A. Additionally, a 4.9V +/-3%
50mA LDO is integrated into the IC for supplying low power external circuitry. The one-wire interface (EN/SET)
is available to place the bq25040 into Test Jig Mode. In Test Jig Mode, the output is regulated at 4.2V and can
be used without a battery.The bq25040 has a single power output that charges the battery.. Either a 1-cell
Li-Ion or Li-Ion-Polymer battery with 4.1, 4.2 or 4.4 Volts may be used.

4.2V~3.74V 3.73V~3.65V 3.65V~3.59V 3.59V~3.35V

Figure 5 Battery Block Indication

1. Charging method : CC-CV

2. Charger detect voltage : 4.8 V

3. Charging time : 2h

4. Charging current : 645 mA

5. CV voltage : 4.2 V

6. Cutoff current : 105 mA

7. Full charge indication current (icon stop current) : 110 mA

8. Recharge voltage : 4.16 V

9. Low battery alarm

a. Stand by : 3.59V˨ ±0.05V

b. Call : 3.59V˨ ±0.05V

10. Low battery alarm interval

a. Stand by : 3 min

b. Dedicated : 1 min

11. Switch-off voltage : 3.35 V

LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved.

- 34 -

Only for training and service purposes

3. TECHNICAL BRIEF

GS290 Operational Description Revision B

3.4. Power ON/OFF

GS290 Power State : Defined 3cases as follow

ඖ Power-ON : Power key detect (SM-Power’s ON port)

ඖ Power-ON-charging : Charger detect.

Figure 6 Power on application.

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

- 35 -

LGE Internal Use Only

3. TECHNICAL BRIEF

GS290 Operational Description Revision B

3.4. Power ON/OFF

GS290 Power State : Defined 3cases as follow

ඖ Power-ON : Power key detect (SM-Power’s ON port)

ඖ Power-ON-charging : Charger detect.

Figure 6 Power on application.

Input ON is a power-on input for SM-POWER with 2 active high levels (see Figure 6). It might be triggered by a
push button or by the RTCOUT output of the S-GOLD device as well. To detect if the push-button is pressed
during system operation the logical level at pin ON or its change (if Bit 1 EION in INTCTRL2 is asserted) is
recorded in bit LON of the ISF register. If the high level of voltage at pin ON does not reach VIHdet (Vbat-0.8 ~
Vbat-0.3) the above-mentioned bit won’t be set.

To support Remote power on function for factory mass production, applied an analog switch as following
figure. As monitoring the RPWRON and Key matrix KP_OUT(2) & KP_IN (6), GS290 system recognize whether
remote power on or End-key pushed

GS290 Operational Description Revision B

Figure 7 Remote power on and End-key power on circuit

Q201

1

2

3

Q200

1

2

3

K03

1

2
1
2R

7
12

R

K57

K
001

222R

10K

R226

82

2

R

K2

RTC_2V11

KP_OUT[2]

RPWRON

KP_IN[6]

RPWRON_EN

END

PWRON

END_KEY_IN

END_KEY_IN

Power On

LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved.

- 36 -

Only for training and service purposes

3. TECHNICAL BRIEF

GS290 Operational Description Revision B

Figure 7 Remote power on and End-key power on circuit

3.5. SIM & uSD interface

GS290 supports 1.8V & 2.9V plug in SIM, SIM interface scheme is shown in (Figure 8).

SIM_IO, SIM_CLK, SIM_RST ports are used to communicate with BBP(S-Gold3) and the SIM power supply
enabled by PMIC.

SIM Interface

SIM_CLK : SIM card reference clock

SIM_RST : SIM card Async /sync reset

SIM_IO : SIM card bidirectional reset

Figure 8 SIM & Micro SD Circuit

GCA26D-6S-H18-E1500

J400

9 8

10 7

6 3

5 2

4 1

C1C5
C2C6

C3C7
GND1GND4
GND2GND3

0.1u

C401

VSIM_2V9 VSIM_2V9

R407

10K

22p

C405

C409

DNI

C410

22p

VSIM_2V9

SIM_RST

SIM_IO SIM_CLK

SIM CONNECTOR

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

- 37 -

LGE Internal Use Only

3. TECHNICAL BRIEF

GS290 Operational Description Revision B

The MicroSD Memory Module has eight exposed contacts on one side. The S-Gold3 is connected to the module
using a dedicated eight-pin connector

Micro SD Memory Card Detection Scheme

GS290 Operational Description Revision B

The MicroSD Memory Module has eight exposed contacts on one side. The S-Gold3 is connected to the module
using a dedicated eight-pin connector

Micro SD Memory Card Detection Scheme

Micro SD memory pad assign.

SD mode

Pin No. Name Type Description

1 DAT2 I/O Data bit [2]

2 CD/DAT3 I/O Data bit [3]

3 CMD I/O Command response

4 VDD Power Power supply

5 CLK I Clock

6 VSS Ground Power ground

7 DAT0 I/O Data bit [0]

8 DAT1 I/O Data bit [1]

LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved.

- 38 -

Only for training and service purposes

3. TECHNICAL BRIEF

GS290 Operational Description Revision B

3.6. Memory

2Gbit NAND & 1Gbit DDRSDRAM employed on GS290 with 8 & 16 bit parallel data bus thru ADD(0) ~ ADD(29).
The 512Mbit Nand Flash memory with DDRAM stacked device family offers multiple high-performance
solutions.

n
0
15

31
C

041C n

0
1

n01441C

641C n01

K3.3501R

TP103

u1.0911C

SD_1V8

401R K01

u1.0901C

921C u1.0

SD_1V8

SD_1V8

TP106

TP108
TP109
TP112

TP104

8
1
1C n0

1

u1.0141C

541C u1.0

631C u1.0

n01731C

K522H1HACB-B060

U101

21T

11T

01T3T2T

1T

21R11R

01R

3R2R1R

21P

1
1P

3P2P1P

2N

2M

2L

01K9K8K

5K4K2K

1
1J

01J9J8J

7J

6J5J4J

3J

P8D5

P4D6

E6

P6F6

C8F5

C4E5

D7

P5C7

C6

P9L7

P7L6

H10K7

G2K6

C9N9

C5M9

L9

H2N8

M8

N3L8

E3N7

K3M7

L3N6

F3M6

M3N5

G3M5

L5

D11N4

E11M4

F11L4

G11E9

K11E7

L11F7

M11G5

N11G7

C10D9

D10D8

E10E8

F10F8

L10G8

M10G4

N10F4

P10E4

D4

2J

9H8H7H6H

5
H

4
H

3H

01G

9G

6G

9F

2F

11
H

2E

3D

2D

1
D

2
1
C

1
1C3C

2C1

C

21B11B

01B

3B2B1B

21A

11A

0
1A

3A

2A

1A

1CN

2CN

3
C
N

4CN

5CN

6CN

7CN

8CN

9CN

01CN

11CN

2
1
C
N

3
1
C
N

41CN

51CN

61CN

7
1
C
N

81CN

91CN

0

2
C
N

1
2
C
N

22CN

32
C

N

4
2
C
N

5
2
C
N

62CN

72CN

8
2
C
N

92CN

0
3
C
N

13CN

23CN

33
C

N

43
C

N

53CN

A0

A1 I_O0

A2 I_O1

A3 I_O2

A4 I_O3

A5 I_O4

A6 I_O5

A7 I_O6

A8 I_O7

A9 I_O8

A10 I_O9

A11 I_O10

A12 I_O11

A13 I_O12

DQ0 I_O13

DQ1 I_O14

DQ2 I_O15

DQ3

DQ4 _CE

DQ5 _WEN

DQ6 _RE

DQ7 ALE

DQ8 CLE

DQ9 R__B

DQ10 _WP

DQ11

DQ12 VCCN1

DQ13

DQ14 VSS1

DQ15 VSS2

LDQM VSS3

UDQM VSS4

LDQS VSS5

UDQS VSS6

_CLK

CLK VSSQ

CKE

BA0 VDD1

BA1 VDD2

_RAS VDD3

_CAS

_WED VDDQ1

_CS VDDQ2

63CN

73CN

8
3
C
N

93CN

04CN

14CN

24CN

3
4
C
N

44CN

54CN

64CN

7
4
C
N

84
C

N

94CN

05CN

15CN

25
C

N

35CN

45CN

5
5
C
N

65
C

N

75CN

85
C

N

9
5
C
N

06
C

N

16CN

26CN

3
6
C
N

46CN

56
C

N

66CN

76CN

8
6
C
N

96
C

N

07CN

TP102

TP107

ADD[29]

DATA[10]

DATA[15]

DATA[13]

DATA[12]

DATA[11]

DATA[9]

DATA[8]

DATA[2]

DATA[7]

DATA[6]

DATA[5]

DATA[4]

DATA[3]

DATA[1]

DATA[0]

UDQS

LDQS

ADD[28]

ADD[27]

ADD[26]

SDCLKI

_WR

_WR

SDCLKO

_RD

_RAM_CS

CKE

_CAS

FCDP

_BC1

_BC0

_NAND_CS

ADD[25]

ADD[4]

ADD[3]

ADD[24]

ADD[23]

ADD[22]

ADD[21]

ADD[20]

ADD[2]

ADD[19]

ADD[18]

ADD[17]

ADD[17]

ADD[16]

ADD[16]

ADD[9]

ADD[8]

ADD[13]

ADD[7]

ADD[12]

ADD[6]

ADD[11]

ADD[5]

ADD[10]

ADD[1]

ADD[0]

_RAS

ADD[15]

ADD[14]

DATA[14]

BA0
BA1

_WP

ADD[16:29]

A

DD[0:15]

DATA[0:15]

(2048Mbit NAND / 1024 Mbit DDR SDRAM, 1.8V I/O)

Large Block Memory

GS290 Operational Description Revision B

3.6. Memory

2Gbit NAND & 1Gbit DDRSDRAM employed on GS290 with 8 & 16 bit parallel data bus thru ADD(0) ~ ADD(29).
The 512Mbit Nand Flash memory with DDRAM stacked device family offers multiple high-performance
solutions.

Figure 9 Flash memory & DDR RAM MCP circuit diagram

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

- 39 -

LGE Internal Use Only

3. TECHNICAL BRIEF

GS290 Operational Description Revision B

3.7. LCD Display

LCD module include:

- Main LCD: 3.0” 240x400 WQVGA, 262K color TFT

- Backlight : 5 piece of white LED

LCD FPC Interface Spec:

Table 7. LCD FPC Interface Spec.

LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved.

- 40 -

Only for training and service purposes

3. TECHNICAL BRIEF

GS290 Operational Description Revision B

3.8. Keypad Switching & Scanning

The keypad interface is a peripheral which can be used for scanning keypads up to 3 rows (outputs from Port
Control Logic) and 2columns (inputs to PCL). The number of rows and columns depend on settings of the PCL.

Figure 10 Key pad part key matrix

VA407

EVLC5S0250

CN401

3

2

1

R425 680

VA412

R423 680

VA411

EVLC5S0250

VA413

CN403

3

2

1

KB402

KB400

DNI

VA404

R426

680

R424 680

R420

680

DNI

VA400

DNI

VA403

R419 680

R415

680

CN407

4

3

2

1

VA415

EVLC5S0250

KB401

VBAT

R414

680

R412

680

EVLC5S0250

VA416

EVLC5S0250

VA406

R427

680

KP_OUT[2]

KP_OUT[2]

KP_IN[5]

KP_IN[5]

KP_OUT[3]

KP_OUT[3]

KP_OUT[0]

KP_OUT[0]

KP_IN[3]

KP_IN[3]

END

END

SEND

CLR

VOL UP & DOWN

CAM HOLD

KEY PAD

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

LGE Internal Use Only

- 41 -

3. TECHNICAL BRIEF

GS290 Operational Description Revision B

3.9. Keypad back-light illumination

There are 2 snow white color LEDs on Key FPCB for keypad illumination. Keypad Back-light is controlled by
SM-Power Flash LED port which has constant current control function. The whole configuration of the
SM-POWER Flash LED drivers is shown in below Figure11

.

Figure 11 Keypad Back-light LEDs

LD401LD404LD405

2
04

R

0
2
1

314R

0
2
1

224R

021

LD403

1
2
4R

021

604R

021

VBAT

LD400LD402

EVL5M02200

VA405

6
14

R

021

KEY_BL

KEY LED

LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved.

- 42 -

Only for training and service purposes

3. TECHNICAL BRIEF

GS290 Operational Description Revision B

3.10. LCD back-light illumination

Figure 12 LCD Back light unit and Flash LED charge pump IC

The AAT3169 is a write-only single wire interface. It provides access to up to 32 registers that control device
functionality.In this system, two sets of pulse trains are transmitted via the SPIF pin. The first pulse set is used to
set the desired address. After the bus is held high for the address hold period, the next pulse set is used to write
the data value. After the data pulses are transmitted the bus is held high again for the data hold period to
signify the data write is complete. At this point the slave device latches the data into the address that was
selected by the first set of pulses. The protocol for using this interface is described in the following subsection.

GS290 Operational Description Revision B

3.10. LCD back-light illumination

Figure 12 LCD Back light unit and Flash LED charge pump IC

The AAT3169 is a write-only single wire interface. It provides access to up to 32 registers that control device
functionality.In this system, two sets of pulse trains are transmitted via the SPIF pin. The first pulse set is used to
set the desired address. After the bus is held high for the address hold period, the next pulse set is used to write
the data value. After the data pulses are transmitted the bus is held high again for the data hold period to
signify the data write is complete. At this point the slave device latches the data into the address that was
selected by the first set of pulses. The protocol for using this interface is described in the following subsection.

Figure 13 I2C Serial data port control method

VBAT

C403

1u

AAT3169IFO-T1

U401

215

110

14

133

12

11

9

6

85

74

C1+ C2+

C1- C2-

OUTCP

IN

D1

D2

EN_SET D3

D4

GND D5

PGND D6

C406

1u

K0
0

1

8
04

R

1u

C408

C417
1u

LCD_BACKLIGHT_EN

MLED

MLED5

MLED4

MLED3

MLED2

MLED1

LCD Backlight

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

- 43 -

LGE Internal Use Only

3. TECHNICAL BRIEF

GS290 Operational Description Revision B

3.11. Audio

GS290 Audio signal flow diagram as following diagram.

Figure 14 Audio signal flow diagram

LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved.

- 44 -

Only for training and service purposes

3. TECHNICAL BRIEF

GS290 Operational Description Revision B

3.12.1. Audio amplifier

Audio amplifier sub system IC is an audio power amplifier capable of delivering 1.25W of continuous average
power into a mono 8Ω load, 42mW per channel of continuous average power into stereo 32Ω single-ended (SE)
loads. The LM49151 features digital volume control and ten distinct output modes. The digital volume control,
output modes (mono/SE/OCL) are programmed through a two-wire I2C interface that allows flexibility in
routing and mixing audio channels.

Figure 15 Audio amplifier PMIC

3.12.2. Microphone circuit

Figure 16 Microphone circuit

1uC350

1uC351

C320

2.2u

0

R348

0.1u

C311

VIO_2V62

2.2u

C362

0.1u

C361

220n

C347

220n

C321

VBAT

27p

C342

27p

C343

LM49151TLX

U304

4E

4D

3D4C

2A

E2B3

B2

A1

C3

E3

C2

D2C1

A3D1

A4E1

4B

1B

DDV

DDVSL

INM+ LSOUT+

INM- LSOUT-

INL SET

INR

HPL

BYPASS

I2CVDD
SDA
SCL HPR

D
NG

SSVPC

N1C

P1C

D
N
GPC

220nC364

0.1u

C363

220nC365

2.2u

C319

100K

R330

4.7u

C313

BB_SND_R

BB_SND_L

EAR_P

EAR_N

I2C_SDA
I2C_SCL

SPK_RCV_P

FM_AUDIO_L

FM_AUDIO_R

HSO_R

HSO_L

EAR_GND

SPK_RCV_N

C307

27p

C314
1u

VA300

C318
47p

100n

L303

27p

C322

VA302

MIC300

SPM0410LR5H-QB

6

5

4

3

2

1

OUT

G1

G2

G3

PWR

G4

22nC373

22nC374

BLM15AG121PN1

FB305

BLM15AG121PN1

FB306

VMIC_P

VMIC_N

MAIN_MIC_P

MAIN_MIC_N

MIC

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

- 45 -

LGE Internal Use Only

3. TECHNICAL BRIEF

GS290 Operational Description Revision B

3.13. charging circuit

The bq25040 is a highly integrated Li-ion linear battery charger targeted at space-limited portable applications.
It operates

from either a USB port or AC adapter and charges a single cell Li-Ion battery with up to 1.2A of charge current.
The high input

voltage range with input over-voltage protection supports low-cost unregulated adapters.

MAIN FEATURES

• 30V input rating, with Over-Voltage Protection
(OVP)

• Input Voltage Dynamic Power Management
Feature

• 50mA integrated low dropout linear regulator
(LDO)

• 1% Battery Regulation Accuracy

• 10% Charge Current Accuracy

• Pin selectable USB 100mA and 500mA
maximum input current limit

• 4.2V @ 2.3A Test Jig mode

• Thermal Regulation Protection for Output Current
Control

• Low Battery Leakage Current, BAT Short-Circuit
Protection

Figure 17 Charging circuit

K3.3

6
02

R

BQ25040

U201

5 6

74

83

92

101

11

PGND

IN BAT

ISET _PG

VSS1 CHG

LDO VSS2

EN_SETIFULL

1u

C2101uC212

VIO_2V62

VIO_2V62

50
2

R

IND

C224
1u

VBATVIO_2V62

V_BUS

K00

1

3
2
2R

0
2
8

702R

K
0
0
1

4
2
2R

_CHG_EOC

_PPR

_CHG_EN

RPWRON_EN

Single Charging IC for uUSB

)%
1(

(645mA)

)%1

(

(105mA)

LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved.

- 46 -

Only for training and service purposes

3. TECHNICAL BRIEF

GS290 Operational Description Revision B

3.14 FM radio & BLUETOOTH

z FM radio

Simultaneous operation with Bluetooth

• Support of US/Europe (87.5 to 108 MHz) and Japanese (76 to 90 MHz) FM band

• Wide dynamic range AGC

• Soft mute and stereo blend

• Adjustment-free stereo decoder and AFC

• Autonomous search tuning function (up/down) with programmability (threshold setting)

• RDS demodulator

• Audio output available over Bluetooth audio interface or dedicated audio output

• Control of FM via Bluetooth HCI or I2C

• Adaptive filter to suppress narrow band interference in the FM channel

z Bluetooth

General Features

- Small outline by LTCC substrate built-in RF function and Resin mold

- Integrated top BPF for Bluetooth and FM radio

- Integrated RDS/RBDS demodulator and decoder

- Bluetooth® 2.1+EDR conformity

- Secure Simple Pairing (SSP)

- Encryption Pause Resume (EPR)

- Enhance Inquiry Response (EIR)

- Link Supervision Time Out (LSTO)

- Sniff Sub Rating (SSR)

- Erroneous Data (ED)

- Packet Boundary Flag (PBF)

- WLAN coexistence including 802.15.2 three-wire coexistence support

- UART Interface

- PCM Interface

- I2S Interface

- I2C Interface

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

- 47 -

LGE Internal Use Only

3. TECHNICAL BRIEF

GS290 Operational Description Revision B

Figure 18. Bluetooth / FM Radio Circuit Diagram

15pC382

BC7820

U301

6F

2C

F3

E3

D2

D3

F4

G5

G6

F5

C1

2A

3G

2F

1A

5A

6A

4A

3A

C3

E4

C6

E6

D5

D6

C5

B6

B5

D4

B1

G1

F1

E2

E1

4G

5E

2B

4C

4B

0
_
OI

P

1
_
OI

P

XU
A_
O

L
_TB

_
SSV

S
DAP_

GID

_S
S

V

K
L
C_

P
EEL

S

FM_RX

VSS_FM_AUDIO

FM_TX_P

FM_TX_N

BT_RF

PCM2_IN

PCM2_OUT

PCM2_SYNC

PCM2_CLK

UART_TX

UART_RTS

UART_CTS

UART_RX

SPI_PCM_SEL

PIO_4

H_NIG

E
RV

H
_
TU

OGER

V

TSR_E

LB
ANE_G

ER
V

G
ID_

D
D
V

XUA_D

D
V

O
I
DUA_

XR_

MF
_

D
DV

XT_M

F
_D

D
V

K
LC_SY

S

VSS_BT_RADIO_BAL

PCM1_IN_SPI_MOSI

PCM1_OUT_SPI_MISO

PCM1_SYNC_SPI_CS

PCM1_CLK_SPI_CLK

AUDIO_OUT_L

AUDIO_OUT_R

PIO_2_CLK_REQ_OUT

PIO_3_CLK_REQ_IN

O
ID

A
R_

AN
A_DDV

S
D
AP_DDV

ANT301

0

R302

I

N

D

0

2

3

R

ANT302

1.5p

C302

FL300

LFB212G45SG8A166

IN OUT

GND1 GND2

4

1

3P

T

1uC301
1uC303

R301

100K

100K

R305

100pC305

2.2u

C375

27p

C376

TP308

470

R343

TP313

TP311

C308

0.1u

2.2u

C309 C304

2.2u470n

C377

2.2u

C312

TP312

0.1u

C378

VBT_2V65

VBAT

C379

2.2u

GS290_C-CLIP

ANT303

1

FEED

100n

L318

EVLC18S02015

VA308

2

1

100n

R309

2

22p

C384

EDTY0008606

D300

270n

R304

1

330p

C368

680

R342

47n

C370

47nC371

VBT_2V65

100n

L319

270n

L313

330p

C369

0
81

1
4
3R

K
7
.4

33
3

R

D
1NS

2
8
1DB

5
1MLB

7
03BF

0081

U305

BGB707L7ESD

43

52

61

7

DNGP

VCC C_A

BIAS_OUT ON_OFF

RF_IN RF_OUT

330p

C366

CLK32K

CLK26M

FM_ANT

FM_ANT

FM_AUDIO_L
FM_AUDIO_R

I2S2_CLK

I2S2_SDO
I2S2_WS

BT_UART_RX

BT_CLK_REQ

N

_T

E

S

E

R_

T

B

BT_UART_TX

BT_PCM_CLK

BT_PCM_IN

BT_PCM_OUT

BT_PCM_SYNC

BT_UART_CTS

BT_UART_RTS

BT_HOST_WAKEUP

FM_LNA_CTRL

LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved.

- 48 -

Only for training and service purposes

3. TECHNICAL BRIEF

GS290 Operational Description Revision B

Bluetooth Radio

• Common TX/RX teminal simplifies external matching, eliminates external antenna switch

• No external trimming is required In production

• Bluetooth v2.1 + EDR Specification compliant

Bluetooth Transmitter

• +6 dBm RF Transmit power with level control from on-chip 6-bit DAC over a dynamic range > 30dB

• Class 1 and Class 2 support without the need for an external power amplifier or TX/RX switch.

Bluetooth Receiver

• Integrated channel filters

• Digital demodulator for improved sensitivity and co-channel rejection

• Real time digitized RSSI available on HCI interface

• Fast AGC for enhanced dynamic range

• Channel classification for AFH

Synthesiser

• Fully integrated synthesizer requires no external VCO varactor diode, resonator or loop filter

• Compatible with crystals between 7.5 and 40MHz(in multiples of 250KHz) or an external clock

Audio

• Single-ended stereo analogue output

• 16-bit 48 kHz digital audio bit stream output

Baseband and Software

• Internal 48Kbyte RAM, allows full speed data transfer, mixed voice and data, and full piconet operation,
including all medium rate packet types

• Logic for forward error correction, header error control, access code correlation. CRC, demodulation,
encryption bit stream generation, whitening and transmit pulse shaping. Supports all Bluetooth v 2.0 + EDR
features incl. ESCO and AFH

• Transcoders for A-law, u-law and linear voice from host and A-law, u-law and CVSD voice over air

Physical Interfaces

• Synchronous serial interface up to 4Mbits/s for system debugging

• UART interface with programmable baud rate up to 4Mbits/s with an optional bypass mode

• USB v1.1 interface

• I2C slave for FM

• Two audio PCM interfaces (input and output)

• Analogue stereo (output only)

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

- 49 -

LGE Internal Use Only

3. TECHNICAL BRIEF

GS290 Operational Description Revision B

Figure 19. Bluetooth / FM Radio Functional Block Diagram

 )XQFWLRQDO%ORFN'LDJUDP

)XQFWLRQDO%ORFN'LDJUDP

_`TUOM=PPSLWFK:/&63'DWD6KHHW

LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved.

- 50 -

Only for training and service purposes

3. TECHNICAL BRIEF

GS290 Operational Description Revision B

3.15. 5pin u-USB Interface connector

Figure 20. u-USB Connector Block Diagram

- Micro USB Integrated IC

- Multiplexing USB, UART and audio on a single micro USB connector

5pin Micro
USB connector

USB

UART

Charger

Earphone

Mic

MUIC

VBUS

D-

D+

ID

GND

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

- 51 -

LGE Internal Use Only

3. TECHNICAL BRIEF

GS290 Operational Description Revision B

Figure 21.U-USB Connector circuit

The MAX14526 is a complete solution for multiplexing USB, UART and audio on a single mini/micro USB

connector. It contains an internal method for determining the device connected and uses an I2C bus for
control.

The switch will multiplex multiple inputs (USB, UART,Microphone, Stereo and Audio) on one mini/microUSB
connector. The USB and UART inputs support Hi-Speed USB and the audio inputs feature negative rail signal
operation allowing simple dc coupled headset speakers. The VB connection is protected against faults up to 28
volts. There is an internal device detection method which uses the USB ID signal pin and the voltage on VBUS.

Each accessory will have a unique detection based on resistor values and voltage on VBUS. The host

microprocessor uses I2C to control the switch position as well as read the results of the accessory detection.

The MAX14526 will also detect USB chargers including dedicated chargers (D+/D- shorted) and high power
host/hub chargers.

SC200

21

DNI

C213

GU073-5P-SD-E1500

CN200

15

13

11

9

7

5

4

3

2

1

14

12

10

8

6

U200

MAX14526EEWP+TCC6

B5

C5

2
B1C2C

C3A2

C4

D3

D1D4

A1

B1

A3

B4B3

A5

A4

D5D2

BAT VB

DN1

DP2

U1 UID

U2

RES

MIC

AUD1 CAP

AUD2

GND

ISET IC

L
CSADS

TNI

COMN1

COMP2

2.2u

C206

R200

2.2K

FB200

VIO_2V62

TP203

V_BUS

C220
22pDNI

C221

VIO_2V62 VUSB

R209 30

30R210

1
1
2R

K
0
33

R218

10K

VBAT

V_BUS

K01

91
2

R

IND

0
2
2R

USW_INT

I2C_SDA

I2C_SCL

USB_DP

USB_DM

UART_TX

UART_RX

RPWRON_EN

USW_ID

USW_ID

USW_DP

USW_DP

USW_DM

USW_DM

Micro USB

LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved.

- 52 -

Only for training and service purposes

3. TECHNICAL BRIEF

GS290 Operational Description Revision B

3-2. RF circuit

*RF Block Diagram

GS290 Operational Description Revision B

3-2. RF circuit

*RF Block Diagram

PAM(SKY77344)

FEM

ANT

Mobile Switch

GS290 Operational Description Revision B

3-2. RF circuit

*RF Block Diagram

Figure 22 GS290 RF part Block Diagram

PAM(SKY77344)

FEM

ANT

Mobile Switch

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

- 53 -

LGE Internal Use Only

3. TECHNICAL BRIEF

GS290 Operational Description Revision B

3.16. General Description

The RF transceiver (PMB 6272 SMARTi-PM) is an integrated single chip, quad-band transceiver for
GSM850/GSM900/GSM1800/GSM1900 designed for voice and data transfer applications. The transceiver
provides an analog I/Q baseband interface and consists of a direct conversion receiver and a quad-band polar
transmitter for GSM and EDGE with integrated PGA functionality. Further on a completely integrated
SD-synthesizer with HSCSD and GPRS/EDGE capability, a digitally controlled reference oscillator with three
outputs, a fully integrated quad-band RF oscillator and a three wire bus interface with all necessary control
circuits complete the transceiver.

Figure 23 RF transceiver PMB6272 SMARTi-PM functional block diagram

LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved.

- 54 -

Only for training and service purposes

3. TECHNICAL BRIEF

GS290 Operational Description Revision B

Figure 24 RF transceiver PMB6272 SMARTi-PM schematic

26MHz

X500 TSX-3225

21

3

4

GND2 HOT2

HOT1 GND1

0.1u

C518

U500

PMB6272

20

19

18

17

16

15

14

13

12

2
1

2211

3201429528

6
2

7726

825924

0
3

3132231

33

34

35

36

37

38

39

40

41

GND4

GND3

VDDMIX2V8

VDDTX2V8

TX2

TX1

VDDTX1V5

VBIAS

FE2

A 1EF

XA 8V2SAIBD

DV

B X1X

R

XB 1X

R

8V2

G
IDDDV X2X

R

A

D

2XR

K
L
C

2DN

G

5V1

GI

D

D

DV X3X

R

3SYSF 3XR

2SYSF X4X

R

OX 4X

R

X
OX 5V

1AN

L
D
DV

GND1

FSYS1

VDDXO2V8

EN

VDDVCO2V8

VCO_RC

VDDRX1V5

VDDRX2V8

VRF_2V85

VRF_1V5

C511
220n

VRF_2V85

1nC516

C517
47n

0.1u

C535

01

6

0

5R

10

R507

VRF_2V85VRF_1V5

220n

C522

0.1u

C506

R508

820

0.1u

C536

0.1u

C537

RF_EN

RF_DA

RF_CLK

26MHZ_MCLK

QX
Q
IX
I

CLK26M

LBAND_PAM_IN

HBAND_PAM_IN

VC1

VC2

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

- 55 -

LGE Internal Use Only

3. TECHNICAL BRIEF

GS290 Operational Description Revision B

3.17. Receiver part

Figure 25 Receiver part block diagram

The constant gain direct conversion receiver contains all active circuits for a complete receiver chain for
GSM/GPRS/EDGE (see Figure 25). The GSM850/900/DCS1800/ PCS1900 LNAs with balanced inputs are fully
integrated. No inter-stage filtering is needed. The orthogonal LO signals are generated by a divider-by-four for
GSM850/900 band and a divider-by-two for the DCS1800/PCS1900 band. Down conversion to baseband
domain is performed by low/high band quadrature direct down conversion mixers. The baseband chain
contains a LNB (low noise buffer), channel filter, output buffer and DC-offset compensation. The 3rd order low
pass filter is fully integrated and provides sufficient suppression of blocking signals as well as adjacent channel
interferers and avoids anti-aliasing through the baseband ADC. The receive path is fully differential to suppress
on-chip interferences. Several gain steps are implemented to cope with the dynamic range of the input signals.
Depending on the baseband ADC dynamic range, single- or multiple gain step switching schemes are
applicable. Furthermore an automatic DC-offset compensation can be used (depending on the gain setting) to
reduce the DC-offset at baseband-output. A programmable gain correction can be applied to correct for front
end- and receiver gain tolerances.

LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved.

- 56 -

Only for training and service purposes

3. TECHNICAL BRIEF

GS290 Operational Description Revision B

3.18. Transmitter part

The GMSK transmitter supports power class 4 for GSM850 and GSM900 as well as power class 1 for DCS1800
and PCS1900. The digital transmitter architecture is based on a very low power fractional-N Sigma-Delta
synthesizer without any external components (see Figure39). The analog I/Q modulation data from the
baseband is converted to digital, filtered and transformed to polar coordinates. The phase/frequency signal is
further on processed by the Sigma-Delta modulation loop. The output of its associated VCO is divided by four
or two, respectively, and connected via an output buffer to the appropriate single ended output pin. This
configuration ensures minimum noise level. The 8PSK transmitter supports power class E2 for GSM850 and
GSM900 as well as for DCS1800 and PCS1900. The digital transmitter architecture is based on a polar
modulation architecture, where the analog modulation data (rectangular I/Q coordinates) is converted to
digital data stream and is subsequently transformed to polar coordinates by means of a CORDIC algorithm. The
resulting amplitude information is fed into a digital multiplier for power ramping and level control. The ready
processed amplitude signal is applied to a DAC followed by a low pass filter which reconstructs the analog
amplitude information. The phase signal from the CORDIC is applied to the Sigma-Delta fractional-N
modulation loop. The divided output of its associated VCO is fed to a highly linear amplitude modulator,
recombining amplitude and phase information. The output of the amplitude modulator is connected to a
single ended output RF PGA for digitally setting the wanted transmit power. The PA interface of SMARTi-PM
supports direct control of standard dual mode power amplifiers (PA’s) which usually have a power control input
VAPC and an optional bias

Figure 26 Transmitter part block diagram

control pin VBIAS for efficiency enhancement. In GMSK mode, the PA is in saturated high efficiency mode and is
controlled via its VAPC pin directly by the baseband ramping DAC. In this way both up- / down-ramping and
output power level are set. In 8PSK mode, the ramping functionality is assured by an on-chip ramping
generator, whereas output power is controlled by the PGA’s as described above.

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

- 57 -

LGE Internal Use Only

3. TECHNICAL BRIEF

GS290 Operational Description Revision B

3.19. RF synthesizer

The transceiver contains a fractional-N sigma-delta synthesizer for the frequency synthesis in the RX operation
mode. For TX operation mode the fractional-N sigma-delta synthesizer is used as Sigma-Delta modulation loop
to process the phase/frequency signal. The 26MHz reference signal is provided by the internal crystal oscillator.
This frequency serves as comparison frequency of the phase detector and as clock frequency for all digital
circuitry.The divider in the feedback path of the synthesizer is carried out as a multi-modulus divider (MMD).
The loop filter is fully integrated and the loop bandwidth is about 100 kHz to allow the transfer of the phase
modulation. The loop bandwidth is automatically adjusted prior to each slot (OLGA). To overcome the
statistical spread of the loop filter element values an automatic loop filter adjustment (ALFA) is performed
before each synthesizer startup. The fully integrated quad-band VCO is designed for the four GSM bands (850,
900, 1800, 1900 MHz) and operates at double or four times transmit or receive frequency. To cover the wide
frequency range the VCO is automatically aligned by a binary automatic band selection (BABS) before each
synthesizer startup.

LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved.

- 58 -

Only for training and service purposes

3. TECHNICAL BRIEF

GS290 Operational Description Revision B

3.20. Front End Module control

Implemented in the S-Gold3 (FL500) are two outputs which are VC1, VC2 for direct control of front end modules
with two logic input pins to select RX and TX mode as well as low and high band operation..

Table 8 FEM Control Logic

22p

C524

22p

R501

KMS-518_P

SW500

G1

A

C

G2

100n

L501

0.5p

C510

C539
DNI

100R502
100R504

C503
47p

C508
47p

ANT500

DNI

C519

LMSP43NA-782

FL500

0
2

9131

11

81

518417

216

9

5

4

013

612

1

17

ANT

1XR

0
58

MS
G

2X
R

05
8

MSG

1CV

1XR00

9
MSG 2CV

2XR009MSG

1X
R0

0
81

MS
G 1DNG

2X

R0
08
1

MSG

2DNG

1X
R

009

1
MSG 3DN

G

2X
R

009

1
MSG 4

D
N
G

5DNG

XT0091_0081MSG

X
T
0
09_

0
58MSG 1CN

2
C
N

0

R510

VC1
VC2

L

L

GSM 1800 / 1900_ RX

GSM850 / 900_RX

VC2 (FE2)

H

H

L

GSM850 / 900_TX

L L

L

GSM 1800 / 1900_ TX

VC1 (FE1)

CI:$0.05(CMOS->PIN)

GS290 Operational Description Revision B

3.20. Front End Module control

Implemented in the S-Gold3 (FL500) are two outputs which are VC1, VC2 for direct control of front end modules
with two logic input pins to select RX and TX mode as well as low and high band operation..

Table 8 FEM Control Logic

Figure 27 FEM schematic

- 59 -

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

LGE Internal Use Only

3. TECHNICAL BRIEF

GS290 Operational Description Revision B

3.21. Power Amplifier Module

The SKY77344 Power Amplifier Module(PAM) is designed in a compact from fact for quad-band cellular
handsets comprising GSM850/900,DCS1800,PCS1900,supporting GMSK and linear EDGE modulation. Class12
General Packet Radio Service(GPRS) multi-slot operation is also supported.

The module consists of a GSM850/900 PA block and a DCS1800/PCS1900 PA block,impedance matching
circuitry for 50ohm input and output impedances, and a Multi-function Power Amplifier Control(MFC) block. A
custom CMOS integrated circuit provides the internal MFC function and interface circuitry.

Two separate Heterojunction Bipolar Transistor(HBT) PA blocks are fabricated onto InGaP die; one supports the
GSM850/900 bands, the other supports the DCS1800 and PCS1900 bands. Both PA blocks share common
power supply pins to distribute current. The InGaP die, the silicon die, nad the passive components are
mounted on a multi layer laminate substrate. The assembly is encapsulated with plastic overmold.

RF input and output ports are internally matched to 50ohm to reduce the number of external components
Extremely low leakage current(2.5uA) maximizes handset standby time. Band select(BS) circuitry select GSM
transmit frequency band(logic0) and DCS/PCS transmit frequency(logic1). MODE circuitry selects GMSK
modulation (logic0) or EDGE modulation(logic1). VRAMP controls the output power for GMSK modulation and
provides bias optimization for EDGE modulation depending on the state of MODE control.

The integrated multi-function(MFC) provides envelope amplitude control in GMSK mode, reducing sensitivity
to input drive, temp, power supply, and process variation. In EDGE mode, the MFC configures the PA for fixed
gain, and provides the ability to optimize the PA bias operation at different power levels, This circuitry regulates
PA bias conditions, reducing sensitivity to temp., power supply, and process variation. The Enable input
signal(pin8) provides a standby state to minimize battery drain..

.Table 9 PAM pin description

LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved.

- 60 -

Only for training and service purposes

3. TECHNICAL BRIEF

GS290 Operational Description Revision B

3.22. PAM Schematic

Figure 28 PAM schematic

22u

C500

C509

47p

1KR505

SKY77344

U501

12

11 10

12 9

13 8

14 7

15 6

16 5

17 4

18 3

19 2

20 1

BSMODE

ENABLEVDET

VRAMPVBATT2

DCS_PCS_INVBATT1

GSM_INGND9

GND1DCS_PCS_OUT

GND2GND8

GND3GSM_OUT

GND4GND7

GND5GND6

D

N

GP

1u

C530

VBAT

27p

C531

PA_LEVEL

PA_MODE

PA_BAND

TXON_PA

LBAND_PAM_I

N

HBAND_PAM_IN

SKY77344

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

- 61 -

LGE Internal Use Only

4. TROUBLE SHOOTING

GS290 Operational Description Revision B

4. Trouble shooting

4.1 Trouble shooting test setup

Equipment setup

Power on all of test equipment

- Connect PIF-UNION JIG or dummy battery to the DUT for power up.

- Connect mobile switch cable between Communication test set and DUT when you need to make a phone call.

- Follow trouble shooting procedure

4. TROUBLE SHOOTING

LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved.

- 62 -

Only for training and service purposes

4. TROUBLE SHOOTING

GS290 Operational Description Revision B

4.2 Power on Trouble

Check Points

-Battery Voltage( Need to over 3.35V)

-Power-On Key detection (PWRON signal)

-Outputs of LDOs from PMIC

Q201

1

2

3

Q200

1

2

3

K03

1

2
1
2R

7
12

R

K57

K
001

222R

10K

R226

82

2

R

K2

RTC_2V11

KP_OUT[2]

RPWRON

KP_IN[6]

RPWRON_EN

END

PWRON

END_KEY_IN

END_KEY_IN

Power On

R225

DNI

0

R203

0

R202

NC7WZ08L8X_F113

U203

34

25

16

87

A1 VCC

B1 Y1

Y2 B2

GND A2

DNI

C242

VIO_2V62

RTC_2V11

_RESET

SPOWER_INT

PMRSTN

PM_INT

External Reset JIG Connector

TP1

TP2

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

- 63 -

LGE Internal Use Only

GS290 Operational Description Revision B

LDO Net name Output Voltage Output Current Usage

SD1 CORE_1V35 1.35V 600mA Core & for LDO

SD2 SD_1V8 1.8V 300mA Memory

VAUX VFM_2V9 2.9V 100mA Touch, LCD

VIO VIO_2V62 2.62V 100mA Peripherals

VSIM VSIM_2V9 2.9V 70mA SIM card

VMME VMME_2V9 2.9V 150mA u-SD

VUMTS CAM_2V85 2.85V 110mA Camera

VUSB VUSB 3.1V 40mA USB

VLED VLED 2.9V 10mA Not used

VAUDIOa VAUDA_2V5 2.5V 200mA Stereo headset, Mono earpiece

VAUDIOb VAUDB_2V5 2.5V 50mA Analog parts of S-Gold

VRF1 VRF_2V85 2.85V 150mA

2.85 V supply for SMARTi-PM

RF transceiver

VRF2 VRF_1V5 1,53V 100mA

1.5 V supply for SMARTi-PM

RF transceiver

VRF3 VBT_2V65 2.7V 150mA BT/FM Radio

VPLL VPLL_1V35 1.35V 30mA S-GOLD3 PLL

VRTC VRTC_2V11 2.11V 4mA Real Time Clock

VAFC VAFC 2.65V 5mA Not used

VVIB CAM_A_2V8 2.8V 140mA Camera

4. TROUBLE SHOOTING

22u

C234

0.1u

C204

C200
1u

u2.
2

1
0
2C

VAUDA_2V5

C202

2.2u

SD_1V8

u01

0
0
2L

VBAT

302C u1

0.1u

C214

VFM_2V9

1u

C2051uC207

VRF_1V5

10u

L201

10u

C208

2.2u

C209

VPLL_1V35

u1112C

VBAT

CORE_1V35 CAM_A_2V8

U202

PMB6821

4H

8H9D6J

7H6H5H

9G8G7G6G5G4G3G9F8F

7F6F5F4F3F9E

8
E

7E

6E

5E

4E8D7D6D5D4D

6C

L2

L10K2

J10K1

K11

J3

J11H3

H9J2

J1

H10

H1

H11H2

G10G1

G2

G11

F11F1

F10F2

E11E1

E10E2

D1

D11E3

D10

D2

C10C1

C11D3

C2

B1

11L

8A

9J

01K

9L

9K8L8K

7L

8J7K6L

7J6K5K5J5L4L4K3L3K

4J1A4B

11B

1L

11A

9B

01A

0
1B9C9A

8C8B6A7C7A5A7B

5C6B5B4A4C

3A

3B3C2A

2B

MV_0ES

PV_TAD

-CA
+CA

DNEPSUS

N_EO

BSUV

BSU_DDV

P
NI_

O
NOM

NNI_ONOM

ONOM_DDV

M_XEFE

RV

P
TUO_ONO

M

ONOM_SSV

N
TUO_ONO

M

FERR

FERV

KN
I
HS_HSALF

NO_HSALF

APNOXT

LLPV

OILLPDDV

O
IV

2DSV

3SMUP

2SMUP

1SMUP

TROPTUO

NO_REWOP

GODW

1FFO_NO

2FFO_NO

TUO_FFO_NO

LTRC_ECRUOSER

TNI_C2I

TAD_C2I

KLC_C2I

MWP_1LB

MWP_2LB

MWP_3LB

LRTNC_HC

ECRUOS_HC

CU_EGRAHC

EGRAHC_DDV

1NI_ESNES

2NI_ESNES

FER_DDV

DELV

1DSV

RCV

VPIN

VMIN VMME

D+ VDDMME

D-

VDDRF2

RESET_N VRF2

RESET2_N

SLEEP1_N VRF3

SLEEP2_N VDDRF13_AFC

VAUDIOA VRF1

VDDAUDIOA VVIB

VDDSIMVIB

VDDAUDIOB

VAUDIOB VSIM

VAUX VAFC

VDDAUX

VRTC

SU1_GATE

SU1_GND VDDUMTS

SU1_FB VUMTS

SU1_ISENSE

VDDSD1

VDDSD2 SD1_FB

SD2_FB SD1_FBL

SD2_FBL

1SSV

2SSV

3SSV

4SSV

5SSV

6SSV

7SSV

8SSV

9SSV

01SSV

11SSV

21SSV

3
1SSV

41SSV

51SSV

61SSV

7
1SSV

81SSV

91SSV

02SSV

12SSV

22SSV

32SSV

42SSV

52SSV

62SSV

72SSV

82SSV

92SSV

03SSV

FERV_SSV

1DS_SSV

2DS_SSV

u1.0

7
1
2C

u01512C

612C

u01

VBAT

u1.0

3
32

C

CAM_2V85

402R

K7.4

1u

C219

C222

10u

1u

C223

522C

u01

312R

IND

R214

27K

VAUDB_2V5

C226

2.2u0.1u

C227

H-KTRE061SDK

002D

002PT

VBAT

512R K001

VIO_2V62

C228
1u

102PT

612R

K001

VSIM_2V9

2.2u

C229

VBAT

1u

C230

RTC_2V11

2.2u

C231

VBT_2V65

232C

u1

VRF_2V85 VMME_2V9

VBAT

1u

C235

FB201

A122S8

0

6

1

ZPM 0

2

2

2
0
2B

F

A122S8061ZPM

VUSB

1u

C236

1u

C237

2.2u

C238

SD_1V8

C239

2.2u

202PT

VBAT

C240

2.2u

VBAT

C241
1u

VBAT

K7.4

122R

K001

722R

H-KTRE061SDK

102D

USB_SE0_VM

NE_YEK

GODW

USB_OEN

VCXO_EN

TXON_PA

ADS_C2I

LCS_C2I

RTC_OUT

USB_DAT_VP

LRTC_ECRUOSER

USB_DP
USB_DM

RPWRON_EN

2FFO_NO

ON_OFF2

NORWP

TNI_REWOPS

LB_YEK

PMRSTN

FM_SPK_INN
FM_SPK_INP

FM_SPK_OUTP

FM_SPK_OUTN

BT_CLK_REQ

PMIC

LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved.

- 64 -

Only for training and service purposes

4. TROUBLE SHOOTING

GS290 Operational Description Revision B

1. Don’t use Heat Gun

2. Replace main PCB

START

“PWRON” signal

Check 3 pin of Q201

“_RESET” signal

Check 8 pin of U203

Check the all LDO’s

output

Is the 26MHz

clock From X500

Replace main PCB

Check the RPWRON,

replace Q201

Check solder

U203 or replace it

Check solder

U202 or replace it

Check solder X500

or replace it

Check 1 pin of X500

Or Check 11 pin of

U500

Yes

Yes

Yes

Yes

Yes

No

No

No

No

Q201

T

P1

Change Battery or
Check Battery
connector

Battery Voltage,

higher than 3.35V ?

No

U203

U202

U500

11pin of U500

Change Battery Connector

T

P2

1pin of X500

X500

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

- 65 -

LGE Internal Use Only

4. TROUBLE SHOOTING

GS290 Operational Description Revision B

4.3 Charging trouble

Check Points

-Connection of TA (check TA voltage 4.8V)

-Charging Current Path component voltage drop

-Battery voltage

1 Charging method : CC-CV

2 Charger detect voltage : 4.0 V

3 Charging time : 2h 00m

4 Charging current : 645 mA

5 CV voltage : 4.2 V

6 Cutoff current : 105 mA

7 Full charge indication current (icon stop current) : 105 mA

8 Recharge voltage : 4.16 V

4.2V~3.74V 3.73V~3.65V 3.65V~3.59V 3.59V~3.35V

K3.3

6
02

R

BQ25040

U201

5 6

74

83

92

101

11

PGND

IN BAT

ISET _PG

VSS1 CHG

LDO VSS2

EN_SETIFULL

1u

C2101uC212

VIO_2V62

VIO_2V62

50
2

R

IND

C224
1u

VBATVIO_2V62

V_BUS

K00

1

3
2
2R

0
2
8

702R

K
0
0
1

4
2
2R

_CHG_EOC

_PPR

_CHG_EN

RPWRON_EN

Single Charging IC for uUSB

)%
1(

(645mA)

)%1

(

(105mA)

LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved.

TP1

TP2

- 66 -

Only for training and service purposes

4. TROUBLE SHOOTING

GS290 Operational Description Revision B

START

5pin IO(CN200)

Is soldered ?

Source pin

of U201 = 4.8V ?

Output pin

of U201 =4.2V?

Resolder the CN200

Battery voltage is

over 3.4V?

Charge is operating properly

T

he TA can be

broken

Change other TA

then retest

Check solder

U201 or replace it

Waiting until

battery

Voltage goes up to

3.4V

Yes

Yes

Yes

Yes

Yes

No

No

No

No

Battery thermistor

value

is about 10K?

Change the Battery

retest

No

5pin IO(CN200)

U401

TP2: Output pin

U401

TP1: Source pin

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

- 67 -

LGE Internal Use Only

4. TROUBLE SHOOTING

GS290 Operational Description Revision B

4.4 LCD display trouble

Check Points

-LCD assembly status ( LCD FPCB, Connector on FPCB)

-EMI filter soldering

-Connector combination

Charge Pump

Check signal flow via EMI filter

Check the connection LCD FPCB
Connector

ICVE10184E150R101FR FL400

01

5

64

73

82

91

INOUT_A1 INOUT_B1

INOUT_A2 INOUT_B2

INOUT_A3 INOUT_B3

INOUT_A4 INOUT_B4

1G2

G

TP400

R400

DNI

ICVE10184E150R101FR FL401

01

5

6 4

7 3

8 2

9 1

INOUT_A1INOUT_B1

INOUT_A2INOUT_B2

INOUT_A3INOUT_B3

INOUT_A4INOUT_B4

1G

2G

VA402
EVLC14S02050

TP408

TP409

TP410

VFM_2V9

ICVE10184E150R101FR FL402

0

1

5

6 4

7 3

8 2

9 1

INOUT_A1INOUT_B1

INOUT_A2INOUT_B2

INOUT_A3INOUT_B3

INOUT_A4INOUT_B4

1G

2

G

TP411

TP412

C420
1u

TP413

VFM_2V9

CN402

GB042-40S-H10-E3000

21 20

22 19

23 18

24 17

25 16

26 15

27 14

28 13

29 12

30 11

31 10

32 9

33 8

34 7

35 6

36 5

37 4

38 3

39 2

40 1

TP414

IF_MODE

LCD_ID

DIF_VSYNC

DIF_WR

DIF_RESET

DIF_D7

DIF_D6

DIF_D5

DIF_D4

DIF_D3

DIF_D2

DIF_D1

DIF_D0

DIF_CS

DIF_CD

DIF_RD

MLED

MLED5

MLED4

MLED3

MLED2

MLED1

LCD Connector

L

H

Maker ID

H

L

IF

Pin11 : IF_MODE(IF1)

Pin18 : OPEN(OTP)

SHARP

LGIT

Maker

LCD Interface Mode

Pin19 : IF_MODE(IF0)

Pin2 : LCD_VSYNC_I

Pin3 : MAKER_ID

LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved.

- 68 -

Only for training and service purposes

4. TROUBLE SHOOTING

GS290 Operational Description Revision B

START

Is LCD FPCB

normal?

Signal is normal on

DIF Signal

FL400, FL401, FL402

Assemble

Replace LCD FPCB

Check solder and repair

Damaged filter

Yes

Yes

No

No

Check LCD connector

combination then LCD test

with New LCD

FL400

FL402 FL401

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

- 69 -

LGE Internal Use Only

4. TROUBLE SHOOTING

GS290 Operational Description Revision B

4.5 Camera Trouble

Check Points

-Connectors combination

-Socket status

DNI

C413

DNI

C418

BU15TD2WNVX U402

5

3 2

4 1

VOUTVIN

GNDSTBY

DNGP

0

R401

CAM-H88

S400

6141317161251

8

75

94

103

112

121

1824

1923

2022

52

62728292

0313

23

1
D
NGP

2DNGP

3DNGP

4
DNGP

5
D
NGP

6DNGP

7DNGP

8
DNGP

D0 PCLK
D1 VSYNC
D2 HSYNC
D3 STANDBY
D4 SCK
D5 SDA

D6 RESETB
D7 MCLK

1DN

G
D

2DNGD

3DNGD

1DNGA2D

N
GA

DDVD

OIDDV

D
DVA

0

R403

C402

0.1u 0.1u

C404

C407
1u 1u

C412

C414

0.1u

C415

56p

C416

56p

K

001

8

14

R

VBAT

CAM_2V85

CAM_1V5

56p

C419

CAM_1V5CAM_A_2V8

TP415

CAM_LDO_EN

I2C2_SDA

I2C2_SCL

CIF_MCLK

CIF_RESET

CIF_PD

CIF_PCLK

CIF_HSYNC

CIF_D7

CIF_D6

CIF_D5

CIF_D4

CIF_D3

CIF_D2

CIF_D1

CIF_D0

CIF_VSYNC

2M FF CAM Connector

CAMERA PART POWER

GS290 Operational Description Revision B

4.5 Camera Trouble

Check Points

-Connectors combination

-Socket status

Check the connector combination

LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved.

- 70 -

Only for training and service purposes

START

Replace New Camera

module

Working properly?

Assemble

Yes

Yes

No

Check camera connector,

24pin main PCB connector

combination then Camera test

with equipped camera module

Replace Camera module

Yes

Replace

Main PCB

Change CAM connector

So, follow Next sequences

CAM connector

2. Clear PAD

3. Change CAM connector

1. Remove fault CAM connector
with heat gun.

4. TROUBLE SHOOTING

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

- 71 -

LGE Internal Use Only

4. TROUBLE SHOOTING

GS290 Operational Description Revision B

4.6 Receiver & Speaker trouble

Check Points

-Speaker contact

-Audio amp soldering

1uC350

1uC351

C320

2.2u

0

R348

0.1u

C311

VIO_2V62

2.2u

C362

0.1u

C361

220n

C347

220n

C321

VBAT

27p

C342

27p

C343

LM49151TLX

U304

4E

4D

3D4C

2A

E2B3

B2

A1

C3

E3

C2

D2C1

A3D1

A4E1

4B

1B

DDV

DDVSL

INM+ LSOUT+

INM- LSOUT-

INL SET

INR

HPL

BYPASS

I2CVDD
SDA
SCL HPR

D
NG

SSVPC

N1C

P1C

D
N
GPC

220nC364

0.1u

C363

220nC365

2.2u

C319

100K

R330

4.7u

C313

BB_SND_R

BB_SND_L

EAR_P

EAR_N

I2C_SDA
I2C_SCL

SPK_RCV_P

FM_AUDIO_L

FM_AUDIO_R

HSO_R

HSO_L

EAR_GND

SPK_RCV_N

AUDIO AMP SUB SYSTEM & SIGNAL DISTRIBUTOR

FSA2268UMXU306

94

63

52

71

810

1B0 1A

1B1 S1

2B0 2A

2B1 S2

GND VCC

VBAT

68n

L315

68n

L316

2.2u

C381

BLM15BD182SN1D

FB308

1800

BLM15BD182SN1D

FB309

1800

39p

C338

C333
22p 22p

C341

VA305

EVLC5S0250 EVLC5S0250

VA303

BRS-181213SL08-P

CN301

2

1

K
0
0
1

5
4
3R

SPK_RCV_P

SPK_RCV_N

FM_SPK_OUTP

FM_SPK_OUTN RCV_FM_SEL

Receiver & Speaker

TP1 TP2

LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved.

- 72 -

Only for training and service purposes

4. TROUBLE SHOOTING

GS290 Operational Description Revision B

Speaker contact

Audio Subsystem

C365
C364

C343

C342

TP1

TP2

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

- 73 -

LGE Internal Use Only

4. TROUBLE SHOOTING

GS290 Operational Description Revision B

START

Input Signal is

Good(C364,C365

Output Signal is

High(C343,C342)

Replace Audio

Check Speaker ‘s

Combination with PCB.

Yes

Connect Speaker

completely.

No

No

Yes

No

Yes

Assemble

LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved.

- 74 -

Only for training and service purposes

4. TROUBLE SHOOTING

GS290 Operational Description Revision B

4.7 Microphone trouble

Check Points

-Microphone hole

-Mic. Bias & signal line

FB305
FB306

L303

MIC101

TP1

TP1

TP2

TP2

GS290 Operational Description Revision B

4.7 Microphone trouble

Check Points

-Microphone hole

-Mic. Bias & signal line

C307

27p

C314
1u

VA300

C318
47p

100n

L303

27p

C322

VA302

MIC300

SPM0410LR5H-QB

6

5

4

3

2

1

OUT

G1

G2

G3

PWR

G4

22nC373

22nC374

BLM15AG121PN1

FB305

BLM15AG121PN1

FB306

VMIC_P

VMIC_N

MAIN_MIC_P

MAIN_MIC_N

MIC

TP2

TP1

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

- 75 -

LGE Internal Use Only

4. TROUBLE SHOOTING

GS290 Operational Description Revision B

START

Replace MIC

Yes

No

No

Check microphone sound

hole

Replace PCB

Yes

No

MIC Bias

ON?(2.5V) When

Call? (L303)

Assemble

MIC work
properly?

Check mic. Bias line

MIC Siganl OK?

(FB305, FB306)

LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved.

- 76 -

Only for training and service purposes

4. TROUBLE SHOOTING

GS290 Operational Description Revision B

4.8 Vibrator trouble

Check Points

-Vibrator soldering

-IC is working correct

GS290 Operational Description Revision B

4.8 Vibrator trouble

Check Points

-Vibrator soldering

-IC is working correct

Chec

k

PWM Signal

TP1 TP2

TP3

TP4

C330

C331

TP3

TP4

TP1

TP2

R311

TPA6202A1ZQVRU303

B2C1

A1B1

B3C2

A3C3

IN- VDD

IN+ VO+

_SHUTDOWN VO-

BYPASS GND

100K

R318

100K

R310

52
3

R

K1

BU31TD2WNVX U302

5

3 2

4 1

VOUTVIN

GNDSTBY

DNGP

10nC316

51K

R311

100n

L301

413R

K

1

51K

R315

Q300
KRC402E

2

1

C

B

E

GND

IN

OUT

1u

C325

C330
1u

C331
1u

L307

100n

K
1

.5

12
3

R

C355

10n

VBAT

VB301

2

1

VIB_PWM

V

IB_EN

Vibrator

TP1

TP2

TP3

TP4

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

- 77 -

LGE Internal Use Only

4. TROUBLE SHOOTING

GS290 Operational Description Revision B

Assemble

Replace Vibrator

Check PWM

Check U302&Q300

replace it

Check U302or

replace it

START

Yes

No

Check Vibrator contact

Yes

T

P1(VBAT) of

U302 and TP2 is

High?

No

LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved.

- 78 -

Only for training and service purposes

4. TROUBLE SHOOTING

GS290 Operational Description Revision B

4.9 Keypad back light trouble

Check Points

-Signal path is connected well

LD401LD404LD405

2
04

R

0
2
1

314R

0
2
1

224R

021

LD403

1
2
4R

021

604R

021

VBAT

LD400LD402

EVL5M02200

VA405

6
14

R

021

KEY_BL

KEY LED

TP1

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

- 79 -

LGE Internal Use Only

4. TROUBLE SHOOTING

GS290 Operational Description Revision B

START

Check TP1 is

Check

Assemble

Check

R402,R406,R413,R41

6,R421,R422 &
LD400~LD405

Replace U202

Yes

No

No

Check All of LEDs solder

Replace main board

Yes

TP1

LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved.

- 80 -

Only for training and service purposes

4. TROUBLE SHOOTING

GS290 Operational Description Revision B

4.10 SIM & uSD trouble

SIM Check Points

-Power is working

-Socket soldering

-Proper SIM is used

Pin C3 /

SIM_CLK

C7

C1 C3

Check

soldering

all pin of

socket

Pin C1 /

2V9_SIM

Pin C7 / SIM_IO

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

- 81 -

LGE Internal Use Only

4. TROUBLE SHOOTING

GS290 Operational Description Revision B

START

6 pins are

Check Proper SIM

Assemble

Resolder pin

Replace Main Board

Yes

Yes

No

Check All of SIM card voltage

GS290 support

2.9V SIM only

GCA26D-6S-H18-E1500

J400

9 8

10 7

6 3

5 2

4 1

C1C5
C2C6

C3C7
GND1GND4
GND2GND3

0.1u

C401

VSIM_2V9 VSIM_2V9

R407

10K

22p

C405

C409

DNI

C410

22p

VSIM_2V9

SIM_RST

SIM_IO SIM_CLK

SIM CONNECTOR

LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved.

- 82 -

Only for training and service purposes

4. TROUBLE SHOOTING

GS290 Operational Description Revision B

uSD Check Points

-Power is working

-Socket soldering

-Card detect is working

MMC-DETECT PIN

MMC_DETECT SIGNAL

TP1

TP2

TP3 TP4

Card Deject

Card insert

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

- 83 -

LGE Internal Use Only

4. TROUBLE SHOOTING

GS290 Operational Description Revision B

START

T

F socket pins

Check proper

Assemble

Resolder it

(check data line

TP 1~4 is 2.9V

Signal)

Replace Main Board

Yes

Yes

No

Check Micro SD card voltage

(2V8_VMME)

LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved.

- 84 -

Only for training and service purposes

4. TROUBLE SHOOTING

GS290 Operational Description Revision B

4.11 Touch trouble

Check Points

- Touch driver IC soldering`

- Touch connector Crack

KQ13L-4R

CN400

4

3

2

1

VBT_2V65

TSC2007IYZGR

U400

D3B3

D2B2

D1B1

C3A3

C2A2

C1A1

AUX SDA

VDD_REF A1

X+ X-

PENIRQ- SCL

A0 GND

Y+ Y-

VA401

EVLC14S02050

EVLC14S02050

VA408

C425

0.1u

EVLC14S02050

VA409VA410

EVLC14S02050

C426

1u

TP419

TOUCH_INT

I2C_SDA

I2C_SCL

X+

X+

Y+

Y+

X-

X-

Y-

Y-

Touch IC

ENZY0020701

Touch Connector

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

- 85 -

LGE Internal Use Only

4. TROUBLE SHOOTING

GS290 Operational Description Revision B

4.11 Touch trouble

Check Points

- Touch driver IC soldering`

- Touch connector Crack

U400 Solder

Resolder U400

Resolder or Replace

CN400

Yes

No

No

Check Touch Signal

(If not replace front touch

p

anel)

Yes

Yes

Replacd Main Board

U400

CN400 Solder

check

START

CN400

LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved.

- 86 -

Only for training and service purposes

4. TROUBLE SHOOTING

GS290 Operational Description Revision B

4.12 Trouble shooting of Receiver part

Figure 1. Main PCB

ྙ

ྛ

ྚG

Checking Points

ྜ

START

Check point ྙ

DCXO

Check point ྚ

Setup Test Equipment

Cell Power : –74dBm

EGSM CH30

DCS CH699

Re-Download S/W & CAL

Check point ྜ

RX I/Q Signal

Checking Flow

Check point ྛ

Mobile SW & FEM

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

- 87 -

LGE Internal Use Only

4. TROUBLE SHOOTING

GS290 Operational Description Revision B

4.12.1. Checking DCXO Circuit

Replace X500

No

Yes

DCXO Circuit is OK.

See next page to check

PLL

ir

i

TP1(C516) : 26MHz

Figur2. DCXO

DCXO Circuit Diagram

Figure 3. DCXO Cicuit

Waveform

Is the waveform

of TP1(C516) similar to Fig.4?

TP1 (C516)

X500

Figure 4. DCXO Waveform

Checking Points

Checkin

g

Flow

26MHz

X500 TSX-3225

21

3

4

GND2 HOT2

HOT1 GND1

U500

PMB6272

19

18

17

16

15

14

13

2
1

11

019876

5

4

321

AXAB

XB

8V2

G

IDD

DV

A
D

K
L
C

5V
1GI

D
D
DV

3SYSF2SYSF

OXXOX

GND1

FSYS1

VDDXO2V8

EN

VDDVCO2V8

VCO_RC

VDDRX1V5

1nC516

C517
47n

R508

820

RF_EN

26MHZ_MCL

K

TP1(C516)

- 88 -

Only for training and service purposes

LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved.

4. TROUBLE SHOOTING

GS290 Operational Description Revision B

4.12.2. Checking PLL Control signals

Check U500

Yes

No

No

Yes

Control Signal is OK.

See next page to check

Mobile SW & FEM.

No

Yes

Checking Flow

Check U500

Check U500

TP1 (RF_EN)

TP3 (RF_CLK)

Checking Points

Figure 5. Transceiver

Figure 6. Transceiver Circuit

Waveform

RF Transceiver Circuit Diagram

EN Signal(TP1) is OK ?

DA

(

Data,TP2) is Normal ?

CLK

(

Clock,TP3) is Normal ?

TP2 (RF_DATA)

U601

RF_EN(TP1)

RF_CLK(TP2)

RF_DATA(TP3)

Figure 7. PLL Control Waveform

26MHz

X500 TSX-3225

21

3

4

GND2 HOT2

HOT1 GND1

U500

PMB6272

20

19

18

17

16

15

14

13

1
2

2
1

22

11320

1

42

9

52862

7726

8
2

5

924

0
33

132

23

1

33

34

35

36

37

38

39

40

41

GND4

GND3

VDDMIX2V8

VDDTX2V8

TX2

TX1

VDDTX1V5

VBIAS

FE2

A

1E
F

XA

8V
2SA

IB
DDV

B X

1X
R

XB

1X
R

8V
2G
ID
D

DV X2X

R

A
D 2X

R

K
LC 2DN

G

5V
1G
I

D
DDV X3XR

3SYSF 3XR

2SYS

F X

4XR

OX 4X

R

X
OX

5V1A

N
LDDV

GND1

FSYS1

VDDXO2V8

EN

VDDVCO2V8

VCO_RC

VDDRX1V5

VDDRX2V8

1nC516

C517
47n

0.1u

C535

0.1u

C506

R508

820

0.1u

C536

0.1u

C537

RF_EN

RF_DA

RF_CLK

26MHZ_MCLK

QX
Q
IX
I

CLK26M

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

- 89 -

LGE Internal Use Only

4. TROUBLE SHOOTING

GS290 Operational Description Revision B

4.12.3 Checking Mobile SW & FEM

EGSM/GSM850 DCS/PCS

VC1 OFF OFF

VC2 OFF OFF

SW500

FL500

TP1G

TP2G

TP5 ~ 8G

TP3_C508 (VC2)G

Mobile SW & FEM Circuit Diagram

Figure 8. Mobile SW & FEM Circuit

Checking Points

Figure 9. Mobile SW & FEM

Table 2. FEM RX Control Logic

TP4

TP3

TP1 TP2

TP4_C503 (VC1)G

22p

C524

KMS-518_P

SW500

G1

A

C

G2

100n

L501

C539
DNI

100R502
100R504

C503
47p

C508
47p

LMSP43NA-782

FL500

02

91311181

518417

216

9

5

4

013

612

1

17

ANT

1XR058MSG

2XR058MSG 1CV

1XR

0
09MSG 2CV

2X
R0

09
MS
G

1XR0081MSG 1DNG

2XR0081MSG 2DNG

1X
R0

0
91MSG 3DNG

2X
R

009

1
MSG 4

D
N
G

5DNG

XT0091_0081MSG

X
T
0
09_

0
58MSG 1CN

2
C
N

VC1
VC2

TP4

TP1

TP2

TP3

LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved.

- 90 -

Only for training and service purposes

Check TP1 of SW500

TP1 Signal same

Replace Mobile SW (SW500)

Yes

No

Yes

Mobile SW & FEM is OK.

Check Antenna.

Replace U100

Control Signal is

No

Yes

Check TP3, TP4 of FL500 ?

Replace FEM (FL500)

T

P5~8 Signal is

No

Yes

Checking Flow

Figure 10 Mobile SW (R403) Figure 11 FEM Control Signals

FE1

FE2

4. TROUBLE SHOOTING

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

- 91 -

LGE Internal Use Only

4. TROUBLE SHOOTING

GS290 Operational Description Revision B

4.12.4. Checking RX I/Q Signals

Figure 13. RX I/Q

U500G

TP1(I)G

TP2(IX)G

TP3(Q)

TP4(QX)

I

I

Q

Q

RX

Checkin

g

Points

Figure 12. RX I/Q Circuit

Check RX I/Q signals(TP1~TP4)

Signals are

Normal?

Replace Transceiver

PMB6272(U500)

Yes

No

RX Part is OK.

Check Base Band Circuit

or

-

T

P2(IXTP3(Q

T

P4(QX)

T

P1(I)

Checking Flow

Figure 14. RX I/Q Waveform

26MHz

X500 TSX-3225

21

3

4

GND2 HOT2

HOT1 GND1

U500

PMB6272

20

19

18

17

16

15

14

13

1
2

2
1

22

11320

1

42

9

52862

7726

8
2

5

924

0
33

132

23

1

33

34

35

36

37

38

39

40

41

GND4

GND3

VDDMIX2V8

VDDTX2V8

TX2

TX1

VDDTX1V5

VBIAS

FE2

A

1E
F

XA

8V
2SA

IB
DDV

B X

1X
R

XB

1X
R

8V
2G
ID
D

DV X2X

R

A
D 2X

R

K

LC 2DN

G

5V
1G
I

D
DDV X3XR

3SYSF 3XR

2SYS

F X

4XR

OX 4X

R

X
OX

5V1A

N
LDDV

GND1

FSYS1

VDDXO2V8

EN

VDDVCO2V8

VCO_RC

VDDRX1V5

VDDRX2V8

R508

RF_DA

RF_CLK

QX
Q
IX
I

CLK26M

TP1(I)

TP2(IX) TP3(Q) TP4(QX)

LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved.

- 92 -

Only for training and service purposes

4. TROUBLE SHOOTING

GS290 Operational Description Revision B

4.13 Trouble shooting of Transmitter part.

Figure 1. Main PCB

ྙ

ྛ

ྚ

Checking Points

ྜ

ྜྷ

ྞ

Check point ྙ

Check point ྚ

Setup Test Equipment

Cell Power : –74dBm

EGSM CH30

DCS CH699

Check point ྛ

Re-Download S/W & RF CAL

Check point ྜ

Transceiver

Check point ྜྷ

Checking Flow

Check ྞ

FEM & Mobile SW

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

- 93 -

LGE Internal Use Only

4. TROUBLE SHOOTING

GS290 Operational Description Revision B

4.13.1. Checking VCTCXO Circuit

See RX Part “1. Checking DCXO Circuit”

4.13.2. Checking PLL Control Signal

See RX Part “2. Checking PLL Control Signal”

4.13.3. Checking TX I/Q Signals

Replace Transceiver

PMB6272(U500)

Check TX I/Q Signals(TP1~TP4)

Figure 17. TX I/Q Circuit

Yes

No

T

X Part is OK.

Check Base Band Circuit or

Re-Download S/W and Cal

TP4(QX)

TP3(Q) TP2(IX)

Signals are

Normal ?

TP1(I)G

Checking Flow

GS290 Operational Description Revision B

4.13.1. Checking VCTCXO Circuit

See RX Part “1. Checking DCXO Circuit”

4.13.2. Checking PLL Control Signal

See RX Part “2. Checking PLL Control Signal”

4.13.3. Checking TX I/Q Signals

Replace Transceiver

PMB6272(U500)

Check TX I/Q Signals(TP1~TP4)

Figure 17. TX I/Q Circuit

Yes

No

T

X Part is OK.

Check Base Band Circuit or

Re-Download S/W and Cal

TP4(QX)

TP3(Q) TP2(IX)

Signals are

Normal ?

Figure 18. TX I/Q

I

QI Q

U500

TX

TP1

(I)

TP2(IX) TP3(QTP4(QX

TP1(I)G

Checking Flow

Figure 19. TX I/Q Waveform

26MHz

X500 TSX-3225

21

3

4

GND2 HOT2

HOT1 GND1

U500

PMB6272

20

19

18

17

16

15

14

13

1
2

2
1

22

11320

1

42

9

52862

7726

8
2

5

924

0
33

132

23

1

33

34

35

36

37

38

39

40

41

GND4

GND3

VDDMIX2V8

VDDTX2V8

TX2

TX1

VDDTX1V5

VBIAS

FE2

A

1E
F

XA

8V
2SA

IB
DDV

B X

1X
R

XB

1X
R

8V
2G
ID
D

DV X2X

R

A
D 2X

R

K

LC 2DN

G

5V
1G
I

D
DDV X3XR

3SYSF 3XR

2SYS

F X

4XR

OX 4X

R

X
OX

5V1A

N
LDDV

GND1

FSYS1

VDDXO2V8

EN

VDDVCO2V8

VCO_RC

VDDRX1V5

VDDRX2V8

R508

RF_DA

RF_CLK

QX
Q
IX
I

CLK26M

TP1(I)

TP2(IX) TP3(Q) TP4(QX)

LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved.

- 94 -

Only for training and service purposes

4. TROUBLE SHOOTING

GS290 Operational Description Revision B

4.13.4. Checking Transceiver Output Signals

Figure 20. Transceiver Output Circuit

Checking Points

Figure 21. Transceiver Output

Table 3. Transceiver Output Operation

Ramp Burst Control 8PSK

Fixed GMSK

Transceiver OutputMODE

TP1(LBNAD_PAM_IN)G

TP2(HBNAD_PAM_IN)G

TP1(LBNAD_PAM_IN

TP2(HBNAD_PAM_IN

U500

PMB6272

20

19

18

17

16

15

14

13

12

2
1

2211

320142

9

528

6
2

7726

825924

0
3

3132231

33

34

35

36

37

38

39

40

41

GND4

GND3

VDDMIX2V8

VDDTX2V8

TX2

TX1

VDDTX1V5

VBIAS

FE2

A 1EF

XA 8V2SAIBD

DV

B X1X

R

XB 1X

R

8V2

G

IDDDV X2X

R

A
D

2XR

K
L
C

2DN

G

5V1

GI
D

D
DV X3X

R

3SYSF 3XR

2SYSF X4X

R

OX 4X

R

X
OX 5V

1AN

L
D
DV

GND1

FSYS1

VDDXO2V8

EN

VDDVCO2V8

VCO_RC

VDDRX1V5

VDDRX2V8

10

R507

220n

C522

LBAND_PAM_IN
HBAND_PAM_IN

VC1

VC2

TP1(LBNAD_PAM_IN)

TP2(HBNAD_PAM_IN)

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

- 95 -

LGE Internal Use Only

4. TROUBLE SHOOTING

Signals are

Normal ?

Replace

PMB6272(U500)

Yes

No

T

ransceiver is OK.

See next page to check

PAM Control Circuit.

Checking Flow

Check Output Signal

(TP1, TP2)

Figure 22. Transceiver Output (GMSK)

LBAND_PAM_IN (MODE: GMSK) : TP1 LBAND_PAM_IN (MODE: 8PSK) : TP1

EGSM 30CH EGSM 30CH

Figure 23. Transceiver Output (8PSK)

LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved.

- 96 -

Only for training and service purposes

4. TROUBLE SHOOTING

Checking Points

Figure 25. Transceiver Output

Table 4. PAM Mode Operation

HIGH Control Amp bias HIGH

8PSK

HIGH Ramp Burst ControlLOW GMSK

TXON_PA PA_LEVELMODE MODE

Figure 24. PAM Control Signals Circuit

TP1(PA LEVEL

)

TP2(TXON PA

)

TP3(PA_MODE

TP3(PA_MODE)

TP2(TXON_PA)TP1(PA_LEVEL)

Figure 24. PAM Control Signals Circuit

TP1(PA LEVEL

)

TP2(TXON PA

)

TP3(PA_MODE

1KR505

SKY77344

U501

12

11 10

12 9

13 8

14 7

15 6

16 5

17 4

18 3

19 2

20 1

BSMODE

ENABLEVDET

VRAMPVBATT2

DCS_PCS_INVBATT1

GSM_INGND9

GND1DCS_PCS_OUT

GND2GND8

GND3GSM_OUT

GND4GND7

GND5GND6

D

N

GP

VBAT

PA_LEVEL

PA_MODE

PA_BAND

TXON_PA

LBAND_PAM_I

N

HBAND_PAM_IN

TP1(PA_LEVEL)

TP3(PA_MODE)

TP2(TXON_PA)

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

- 97 -

LGE Internal Use Only

4. TROUBLE SHOOTING

Figure 26. GSMK Control Signal

Figure 27. 8PSK Control Signal

Check Control Signals

Signals are

N

orma

l

?

Check

PMB8877(U100)

Yes

No

PAM Control Signal is OK.

See next page to check

FEM & Mobile SW Circuit.

Checking Flow

LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved.

- 98 -

Only for training and service purposes

4. TROUBLE SHOOTING

GS290 Operational Description Revision B

4.13.6 Checking Mobile SW & FEM

EGSM/GSM850 DCS/PCS

VC1 ON OFF

VC2 OFF ON

FL50

TP1

TP2

TP5 ~ 8

TP3

_

C508

Mobile SW & FEM Circuit Diagram

Figure 8. Mobile SW & FEM Circuit

Checking Points

Figure 9. Mobile SW & FEM

Table 2. FEM TX Control Logic

TP3

TP1 TP2

TP4_C503

22p

C524

KMS-518_P

SW500

G1

A

C

G2

100n

L501

C539
DNI

100R502
100R504

C503
47p

C508
47p

LMSP43NA-782

FL500

02

91311181

518417

216

9

5

4

013

612

1

17

ANT

1XR058MSG

2XR058MSG 1CV

1XR

0
09MSG 2CV

2X
R0

09
MS
G

1XR0081MSG 1DNG

2XR0081MSG 2DNG

1X
R0

0
91MSG 3DNG

2X
R

009

1
MSG 4

D
N
G

5DNG

XT0091_0081MSG

X
T
0
09_

0
58MSG 1CN

2
C
N

VC1
VC2

TP1

TP3

TP2

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

- 99 -

LGE Internal Use Only

4. TROUBLE SHOOTING

Check TP1 of SW500

with RF Cable and TP2 of C524

TP1 Signal same

Replace Mobile SW (SW500)

Yes

No

Yes

Mobile SW & FEM is OK.

Check Antenna.

Replace BB CHIP (U100)

Control Signal is

No

Yes

Check TP3, TP4 of FL500 ?

Replace FEM (FL500)

T

P5 Signal is OK?

No

Yes

Checking Flow

EGSM TX

Figure 30 Mobile SW (R403)

Figure 31 FEM Control Signals

TP3(VC2

)

TP4(VC1

)

LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved.

- 100 -

Only for training and service purposes

5. DOWNLOAD & S/W UPGRADE

GS290 Operational Description Revision B

9. Download & S/W upgrade

5. DOWNLOAD & S/W UPGRADE

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

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LGE Internal Use Only