LG KP260, KP265 Service Manual

Service Manual

Date: August, 2008 / Issue 1.0

Internal Use Only

Service Manual

KP260/265

Model : KP260/265

- 3 -

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 (KP265c,d) .......10

3. TECHNICAL BRIEF ........................15

3.1 Power Amplifier module

(SKY77318, U501).................................15

3.2 FEM(LMSP43QA-538, FL500)...............17

3.3 Transceiver (AD6548, U502) .................18

3.4 26 MHz Clock (Crystal, X500)................20

3.5 BT Module with integrated FM tuner

(BC5-FM, U500).....................................21

3.6 Baseband Processor (AD6726, U103)...22

3.7 Display and Interface .............................28

3.8 Camera Interface(AIT716 , U400)..........30

3.9 Keypad Switches and Scanning ............33

3.10 Microphone ..........................................34

3.11 Main Speaker.......................................35

3.12 Headset Interface.................................36

3.13 Key Back-light Illumination...................37

3.14 LCD Back-light Illumination..................38

3.15 VIBRATOR...........................................38

3.16 Battery Charging ..................................39

4. TROUBLE SHOOTING ...................40

4.1 RF Component.......................................40

4.2 RX Trouble.............................................41

4.3 TX Trouble .............................................46

4.4 Bluetooth + FM Radio ............................52

4.5 Power On Trouble..................................55

4.6 Charging Trouble ...................................57

4.7 Vibrator Trouble .....................................60

4.8 LCD Trouble...........................................62

4.9 Camera Trouble .....................................65

4.10 Speaker Trouble ..................................68

4.11 SIM Card Interface Trouble..................70

4.12 Earphone Trouble ................................72

4.13 KEY backlight Trouble .........................74

4.14 Receiver Trouble..................................76

4.15 Microphone Trouble .............................78

4.16 RTC Trouble ........................................80

4.17 Slide open/close Trouble .....................82

4.18 Micro SD Trouble .................................84

5. DOWNLOAD.......................................86

5.1 Download ...............................................86

6. BLOCK DIAGRAM ..........................92

7. CIRCUIT DIAGRAM ........................93

8. BGA IC Pin Check ........................101

9. PCB LAYOUT................................105

10. ENGINEERING MODE ................111

10.1 MF Mode [MENU 1] ...........................112

10.2 ELT Mode [MENU 2]..........................113

10.3 Version [MENU 3] ..............................113

10.4 Factory Reset [MENU 4] ....................113

10.5 Eng Mode [MENU 5] ..........................113

10.6 Network Info [MENU 6] ......................115

11. STAND ALONE TEST .................116

11.1 Introduction ........................................116

11.2 Setting Method...................................116

11.3 Means of Test ....................................117

12. AUTO CALIBRATION..................119

12.1 Overview ............................................119

12.2 Equipment List ...................................119

12.3 Test Jig Operation..............................120

12.4 Procedure ..........................................121

12.5 AGC ...................................................123

12.6 APC....................................................123

12.7 ADC ...................................................123

13. EXPLODED VIEW &

REPLACEMENT PART LIST ......125

13.1 Exploded View ...................................125

13.2 Replacement Parts ............................127

13.3 Accessory ..........................................148

Table Of Contents

LGE Internal Use Only

- 4 -

LGE Internal Use Only

Only for training and service purposes

- 5 -

1. INTRODUCTION

1.1 Purpose

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

1.2 Regulatory Information

A. Security

Toll fraud, the unauthorized use of telecommunications system by an unauthorized part (for example, persons other than your company’s employees, agents, subcontractors, or person working on your company’s behalf) can result in substantial additional charges for your telecommunications services. System users are responsible for the security of own system. There are may be risks of toll fraud associated with your telecommunications system. System users are responsible for programming and configuring the equipment to prevent unauthorized use. The manufacturer does not warrant that this product is immune from the above case but will prevent unauthorized use of common-carrier telecommunication service of facilities accessed through or connected to it. The manufacturer will not be responsible for any charges that result from such unauthorized use.

B. Incidence of Harm

If a telephone company determines that the equipment provided to customer is faulty and possibly causing harm or interruption in service to the telephone network, it should disconnect telephone service until repair can be done. A telephone company may temporarily disconnect service as long as repair is not done.

C. Changes in Service

A local telephone company may make changes in its communications facilities or procedure. If these changes could reasonably be expected to affect the use of the this phone or compatibility with the network, the telephone company is required to give advanced written notice to the user, allowing the user to take appropriate steps to maintain telephone service.

D. Maintenance Limitations

Maintenance limitations on this model must be performed only by the manufacturer or its authorized agent. The user may not make any changes and/or repairs expect as specifically noted in this manual. Therefore, note that unauthorized alternations or repair may affect the regulatory status of the system and may void any remaining warranty.

1. INTRODUCTION

LGE Internal Use Only

- 6 -

1. INTRODUCTION

E. Notice of Radiated Emissions

This model complies with rules regarding radiation and radio frequency emission as defined by local regulatory agencies. In accordance with these agencies, you may be required to provide information such as the following to the end user.

F. Pictures

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

G. Interference and Attenuation

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

H. Electrostatic Sensitive Devices

ATTENTION

Boards, which contain Electrostatic Sensitive Device (ESD), are indicated by the sign. Following information is ESD handling:

• Service personnel should ground themselves by using a wrist strap when exchange system boards.

• When repairs are made to a system board, they should spread the floor with anti-static mat which is also grounded.

• Use a suitable, grounded soldering iron.

• Keep sensitive parts in these protective packages until these are used.

• When returning system boards or parts like EEPROM to the factory, use the protective package as described.

LGE Internal Use Only

Only for training and service purposes

- 7 -

1. INTRODUCTION

1.3 Abbreviations

For the purposes of this manual, following abbreviations apply:

LGE Internal Use Only

APC Automatic Power Control

BB Baseband

BER Bit Error Ratio

CC-CV Constant Current - Constant Voltage

DAC Digital to Analog Converter

DCS Digital Communication System

dBm dB relative to 1 milli watt

DSP Digital Signal Processing

EEPROM Electrical Erasable Programmable Read-Only Memory

ESD Electrostatic Discharge

FPCB Flexible Printed Circuit Board

GMSK Gaussian Minimum Shift Keying

GPIB General Purpose Interface Bus

GSM Global System for Mobile Communications

IPUI International Portable User Identity

IF Intermediate Frequency

LCD Liquid Crystal Display

LDO Low Drop Output

LED Light Emitting Diode

OPLL Offset Phase Locked Loop

- 8 -

1. INTRODUCTION

LGE Internal Use Only

Only for training and service purposes

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

SIM Subscriber Identity Module

SLR Sending Loudness Rating

SRAM Static Random Access Memory

PSRAM Pseudo SRAM

STMR Side Tone Masking Rating

TA Travel Adapter

TDD Time Division Duplex

TDMA Time Division Multiple Access

UART Universal Asynchronous Receiver/Transmitter

VCO Voltage Controlled Oscillator

VCTCXO Voltage Control Temperature Compensated Crystal Oscillator

WAP Wireless Application Protocol

- 9 -

2. PERFORMANCE

2.1 H/W Features

2. PERFORMANCE

LGE Internal Use Only

Item Feature Comment

Standard Battery Li-ion, 3.7V 900mAh

Talk time Up to 240min : GSM Tx Level 7

Stand by time Up to 350 hours (Paging Period: 5, RSSI: -85 dBm)

Charging time Approx. 3 hours

RX Sensitivity -102dBm

TX output power

GSM850, GSM900 : 32.5dBm(Level 5),

DCS , PCS: 29.5dBm(Level 0)

GPRS compatibility Class 10

SIM card type 3V

Display MAIN : TFT 128 x 160 pixel 262K Color

Hard icons. Key Pad

Status Indicator

0 ~ 9, #, *, Up/Down/Left/Right/Ok Navigation Key

Menu Key, Clear Key, Confirm Key, Send Key , PWR Key,

Volume Key, Camera-Hot Key

ANT Internal

EAR Phone Jack Yes (Stereo)

PC Synchronization Yes

Speech coding EFR/FR/HR

Data Yes

Vibrator Yes

Loud Speaker Yes

Voice Recoding Yes

Microphone Yes

Speaker/Receiver Receiver 11X 07, Speaker : 12 X 18

Travel Adapter Yes

MIDI 40poly SW MIDI

Camera 1.3M

- 10 -

2. PERFORMANCE

2.2 Technical Specification (KP265c,d)

LGE Internal Use Only

Only for training and service purposes

Item Description Specification

GSM850

TX: 824 + 0.2 x (n-127) MHz RX: 869 + 0.2 x (n-127) MHz ( n = 128 ~ 251)

GSM900 (EGSM)

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

GSM900 (PGSM)

1Frequency Band TX: 890 + (n-1024) x 0.2 MHz

RX: 935 + (n-1024) x 0.2 MHz (n=1~124)

DCS1800

TX: 1710 + (n-512) x 0.2 MHz RX: 1805 + (n-512) x 0.2 MHz (n=512~885)

PCS1900

TX: 1810 + (n-512) x 0.2 MHz RX: 1905 + (n-512) x 0.2 MHz (n=512~885)

2 Phase Error

RMS < 5 degrees Peak < 20 degrees

3 Frequency Error < 0.1 ppm

GSM850/EGSM900

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

4 Power Level 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

7 16 dBm 3dB 15 0 dBm 5dB

- 11 -

2. PERFORMANCE

LGE Internal Use Only

Item Description Specification

5 EDGE Max. Power Not support

6 EDGE Modulation Accuracy Not support

GSM850/EGSM900

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

7

Output RF Spectrum 6,000 -71

(due to modulation) 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

6,000 -73

GSM850/EGSM900

Offset from Carrier (kHz) Max. (dBm)

Output RF Spectrum 400 -19

8

(due to switching transient) 600 -21

1,200 -21

1,800 -24

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2. PERFORMANCE

LGE Internal Use Only

Only for training and service purposes

Item Description Specification

PCS

Offset from Carrier (kHz). Max. (dBm)

Output RF Spectrum 400 -22

8

(due to switching transient) 600 -24

1,200 -24

1,800 -27

9 Spurious Emissions

Conduction, Emission Status

Radiation, Emission Status

GSM850/EGSM900

10 Bit Error Ratio

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

DCS1800/PCS1900

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

11 RX Level Report Accuracy 2 3 dB

12 SLR 8 3 dB

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

100 -12 -

200 0 -

300 0 -12

13 Sending Response 1,000 0 -6

2,000 4 -6

3,000 4 -6

3,400 4 -9

4,000 0 -

14 RLR -4 3 dB

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

100 -6 7

200 2 7

15 Receiving Response (Type 3.2) 300 2 -9

1,000 2 -7

3,400 2 -12

4,000 2 -

- 13 -

2. PERFORMANCE

LGE Internal Use Only

Item Description Specification

16 STMR

> 17 dB

17 Echo Loss > 40 dB

18 Idle Noise Sending < -64 dBm0p

19 Idle Noise Receiving < -36 dBm0p

Max. power

< 300mA @GSM850, PL=5

< 230mA @PCS, PL=0

Standby

< 5.5mA @PP2

< 3.3mA @PP5

< 2.7mA @PP9

20 Power consumption Bluetooth

< 5.0mA @ Bluetooth on (Standby)

< 300mA @ Bluetooth connected (Call)

FM radio

< 40mA @ FM Radio Operation (AVG)

Backup Battery (Without Main Battery)

Normal Power Off : < 5uA

Emergency Power Off : < 15uA

4 hr., Min.@GSM850/ESGSM900, PL=5

21 Talk Time

6 hr., Min.@GSM850/EGSM900, PL=12

4.5 hr., Min.@DCS/PCS, PL=0

7 hr., Min.@DCS/PCS, PL=10

400 hr., Min.@PP9

350 hr., Min.@PP5

22 Standby Time - Full charge, no receive/send and keep GSM in idle mode.

Broadcast set off. Signal strength display set at 3

levelabove. Backlight of phone set off.

At least 55 dB under below conditions:

23 Ringer Volume(TBD) 1. Ringer set as ringer.

2. Test distance set as 1 m.

- 14 -

2. PERFORMANCE

LGE Internal Use Only

Only for training and service purposes

Item Description Specification

24 Charge Current

Fast Charge : < 450 mA

Slow Charge: < 80 mA

25 Charging Time Under 3 hr.

Antenna Bar Number Power

5 -92 dBm ~

4 -100 dBm ~ -93 dBm

26 Antenna Display 3 skip

2 -103 dBm ~ -101 dBm

1 -105 dBm ~ -104 dBm

0~ -105 dBm

Battery Bar Number Voltage

1 → 0 3.42V 0.05V

27 Battery Indicator 2 → 1 3.55V 0.05 V

3 → 23.7V 0.05 V

34.2V

28 Low Voltage Warning(TBD)

3.42 0.05 V (Call)

3.42 0.05 V (Standby)

29 Forced shut down Voltage 3.33 0.05V

30 Battery Type

Main Battery : Li-ion, 900mAh, Inner Pack

Back-up Battery : Lithium, 1mAh

31 Travel Charger

Input: 100 ~ 240 V, 50/60Hz

Output: 5.6V, 400mA

- 15 -

3. TECHNICAL BRIEF

3.1 Power Amplifier module (SKY77318, U501)

The SKY77318 Power Amplifier Module (PAM) is designed in a low profile (1.2 mm), compact form factor for quad-band cellular handsets comprising GSM850/900, DCS1800, and PCS1900 operation. The PAM also supports Class 12 General Packet Radio Service (GPRS) multi-slot operation. The module consists of separate GSM PA and DCS1800/PCS1900 PA blocks, impedance-matching circuitry for 50 Ω input and output impedances and a Power Amplifier Control (PAC) block with an internal current-sense resistor. The custom BiCMOS integrated circuit provides the internal PAC function and interface circuitry. Fabricated onto a single Gallium Arsenide (GaAs) die, one Heterojunction Bipolar Transistor (HBT) PA block supports the GSM bands and the other supports the DCS1800 and PCS1900 bands. Both PA blocks share common power supply pins to distribute current.

3. TECHNICAL BRIEF

LGE Internal Use Only

Figure 3.1 Functional Block Diagram

LGE Internal Use Only

Only for training and service purposes

3. TECHNICAL BRIEF

- 16 -

Table 3.1 Pad description

Figure 3.2 Pad configuration (Top view) and case marking

3.2 FEM(LMSP43QA-538, FL500)

Quadband Front end modlue for 850/900/1800/1900

- 17 -

3. TECHNICAL BRIEF

LGE Internal Use Only

Table 3.2 Mode Control logic

ANT_SW1 ANT_SW2

GSM850_EGSM TX H H

DCS_PCS TX L H

GSM850 RX H L

EGSM900 RX H L

DCS1800 RX L L

PCS1900 RX L L

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3. TECHNICAL BRIEF

LGE Internal Use Only

Only for training and service purposes

3.3 Transceiver (AD6548, U502)

The AD6548 provides a highly integrated direct conversion radio solution that combines, on a single chip, all radio and power management functions necessary to build the most com-pact GSM radio solution possible. The only external components required for a complete radio design are the Rx SAWs, PA, Switchplexer and a few passives enabling an extremely small cost effective GSM Radio solution. The AD6548 uses the industry proven direct conversion receiver architecture of the OthelloTM family. For Quad band applications the front end features four fully integrated programmable gain differential LNAs. The RF is then down converted by quad-rature mixers and then fed to the baseband programmable-gain amplifiers and active filters for channel selection. The Receiver output pins can be directly connected to the baseband analog processor. The Receive path features automatic calibration and tracking to remove DC offsets. The transmitter features a translation-loop architecture for directly modulating baseband signals onto the integrated TX VCO. The translation-loop modulator and TX VCO are extremely low noise removing the need for external SAW filters prior to the PA. The AD6548 uses a single integrated LO VCO for both the receive and the transmit circuits. The synthesizer lock times are optimized for GPRS applications up to and including class 12. AD6548 incorporates a complete reference crystal calibration system. This allows the external VCTCXO to be replaced with a low cost crystal. No other external components are required. The AD6548 uses the traditional VCTCXO reference source. The AD6548 also contains on-chip low dropout voltage regulators (LDOs) to deliver regulated supply voltages to the functions on chip, with a battery input voltage of between 2.9V and 5.5V. Comprehensive power down options are included to minimize power consumption in normal use. A standard 3 wire serial interface is used to program the IC. The interface features low-voltage digital interface buffers compatible with logic levels from 1.6V to 2.9V.

Figure 3.3 AD6548 Block Diagram

- 19 -

3. TECHNICAL BRIEF

LGE Internal Use Only

Notes:

1. Supply regulated by internal LDO3 and should not be connected to any other supply

2. Internally connected as Synth supply (Counters + SDM + Charge pump)

3. Supply regulated by internal LDO2 and should not be connected to any other supply

Table 1 AD6548/9 Pin Descriptions

No Name Description No Name Description

1 VCC_FE Front end supply (IP) 17 VCC_REF Reference Oscillator Supply (IP)

2I I baseband input/output

18 VAFC/ AD6548 Crystal Freq control (IP)

N/C AD6549: Spare Pin

3IBI baseband input/output 19 REFIN Crystal Connection

4 VCC_BBI Baseband I, TX path supply (IP) 20 REFINB Crystal Connection

5 SDATA Serial port data 21 REF_OP Reference Frequency Output

6 SCLK Serial port clock 22 QB Q baseband input/output

7 SEN Serial port enable 23 Q Q baseband input/output

8 N/C Not connected 24 VCC_BBQ Baseband Q supply (IP)

9 VLDO3 TX LDO Output (1) 25 RX1900B PCS 1900 LNA input

10 TXOP_LO Transmit O/P (850/900MHz) 26 RX1900 PCS 1900 LNA input

11 TXOP_HI Transmit O/P (1800/1900MHz) 27 RX1800B DCS 1800 LNA input

12 VCC_TXVCO TX VCO supply (1) 28 RX1800 DCS 1800 LNA input

13 VDD Serial interface supply 29 RX900B E-GSM LNA input

14 VBAT Battery I/P for LDO reg’s 30 RX900 E-GSM LNA input

15 VLDO1 LDO regulator Output (2) 31 RX850B GSM 850 LNA input

16 VLDO2 LO VCO Supply (3) 32 RX850 GSM 850 LNA input

GOMPLIANT TO JEDEC STANDARDS MO-220-VHHD-2

- 20 -

3. TECHNICAL BRIEF

LGE Internal Use Only

Only for training and service purposes

3.4 26 MHz Clock (Crystal, X500)

The 26 MHz clock (X401) consists of a XO (Crystal Oscillator) which oscillates at a frequency of 26 MHz. The AD6548 requires only an external low cost crystal as the frequency reference. The circuitry to oscillate the crystal and tune its frequency is fully integrated. The Oscillator is a balanced implementation requiring the crystal to be connected across 2 pins. There is a programmable capacitor array included for coarse tuning of fixed offsets (e.g. crystal manufacturing tolerance), and an integrated varactor for dynamic control. The oscillator is designed for use with a 26MHz crystal. Dedicated control software ensures excellent frequency stability under all circumstances.

Figure 3.4 CRYSTAL CIRCUIT DIAGRAM

12

34

DSX321G-26M

X500

26MHz

- 21 -

3. TECHNICAL BRIEF

3.5 BT Module with integrated FM tuner(BC5-FM, U500)

The BlueCore5-FM BGA is a single-chip radio and baseband IC for Bluetooth 2.4GHz systems including enhanced data rates (EDR) to 3Mbits/s. It includes an integrated FM receiver with stereo audio output stage and an RDS demodulator. With the on-chip CSR Bluetooth software stack, it provides a fully compliant Bluetooth system to v2.1 + EDR of the specification for data and voice communications.

LGE Internal Use Only

Only for training and service purposes

3. TECHNICAL BRIEF

- 22 -

3.6 Baseband Processor (AD6726, U103)

• AD6726 is an ADI designed processor

• AD6726 consists of

1. Control Processor Subsystem including:

• 32-bit MCU ARM7TDMI® Control Processor

• 78 MHz operation at 1.8V

• 2Mb of on-chip System SRAM Memory

2. DSP Subsystem including:

• 16-bit Fixed Point DSP Processor

• 91 MIPS[1] at 1.8V

• Data and Program SRAM

• Program Instruction Cache

• Full Rate, Enhanced Full Rate and Half Rate

• Speech Encoding/Decoding

• Capable of Supporting AMR & PDC Speech Algorithms

3. Peripheral Functions

• Parallel and Serial Display Interface

• USB 2.0 Full Speed device Interface

• Keypad Interface

• Support for Burst and Page Mode Flash

• 1.8V and 3.0V, 64 kbps SIM Interface

• Universal System Connector Interface

• Data Services Interface

• SD/Multimedia Card Interface

4. Other

• Supports 13 MHz and 26 MHz Input Clocks

• 1.8V Typical Core Operating Voltages

• 361-Ball Package (13x13mm) , 0.65mm Ball pitch

5. The AD6726 baseband transmit section supports the following mobile station GMSK

modulation power classes:

• GSM 900/850 power classes 4 and 5,

• DCS 1800 power classes 1 and 2, and

• PCS 1900 power classes 1 and 2

- 23 -

3. TECHNICAL BRIEF

LGE Internal Use Only

Figure 3.5 SYSTEM INTERCONECTION OF AD6726 EXTERNAL INTERFACE

- 24 -

3. TECHNICAL BRIEF

3.6.1 Interconnection with external devices

A. RTC block interface

Countered by external X-TAL

32.768kHz oscillator supplies on-chip Real Time Clock circuitry

B. LCD module interface

The LCD module is controlled via mobile media processor AIT716 If AIT716 is in the state of by-pass mode, the LCD control signals from AD6726 are by-passed through AIT716. In operating mode, the AIT716 controls the LCD module through nLCD_CS, nLCD_RS, nLCD_WR, L_DATA07~L_DATA00.

LGE Internal Use Only

Only for training and service purposes

Signals Description

nLCD_CS MAIN LCD driver chip enable. MAIN LCD driver IC has own CS pin

LCD_ID Identify LCD module maker

LCD_RESET This pin resets LCD module. This signal comes from AD6726 directly.

nLCD_WR Enable writing to LCD Driver.

nLCD_RS This pin determines whether the data to LCD module are

LCD command or data.

2V8_MM 2.8V is supplied to LCD driver IC.

Table 3.5.B LCD CONTRON SIGNALS DISCRIPTION

- 25 -

3. TECHNICAL BRIEF

LGE Internal Use Only

The backlight of LCD module is controlled by AD6726 via AAT2845. The control signals related to Backlight LED are given as follows.

C. RF interface

The AD6726 control RF parts through PA_BAND, ANT_SW1, ANT_SW2, ANT_SW3 , CLKON , PA_EN, S_EN, S_DATA, S_CLK

Signals Description

MLED Current source for backlight LED

LCD_DIM_CTRL Control LCD backlight level in 16 steps

MLED[1:4] This pins are returned-paths for backlight LED current source (MLED)

Table 3.5.B2 DESCRIPTION OF LCD BACKLIGHT LED CONTROL

Signals Description

PA_BAND (GPIO 0) PAM Band Select

ANT_SW1 (GPO 9) Antenna switch Band Select

ANT_SW2 (GPO 10) Antenna switch Band Select

PA_EN (GPO 16) PAM Enable/Disable

S_EN (GPO 19) PLL Enable/Disable

S_DATA (GPO 20) Serial Data to PLL

S_CLK (GPO 21) Clock to PLL

Table 3.5.C RF CONTROL SIGNALS DESCRIPTION

- 26 -

3. TECHNICAL BRIEF

D. SIM interface

The AD6726 provides SIM Interface Module. The AD6726 checks status periodically during established call mode whether SIM card is inserted or not, but it doesn't check during deep Sleep mode. In order to communicate with SIM card, 3 signals SIM_DATA, SIM_CLK, SIM_RST(GPIO_23) are required. The descriptions about the signals are given by bellow Table 3-5 in detail.

LGE Internal Use Only

Only for training and service purposes

Signals Description

SIM_DATA

This pin receives and sends data to SIM card.

This model can support 3.0 volt and 1.8 volt interface SIM card.

SIM_CLK Clock 3.25MHz frequency.

SIM_RST

Reset SIM block

(GPIO_23)

Table 3.5.D SIM CONTROL SIGNALS DESCRIPTION

Figure 3.5.D2 SIM Interface of AD6726

SIM_CLK

SIM_RST

CLK

GND

4

7

GND1GND2

8

6

I_O

RST

2

VCC

1

5

VPP

J300

3

15K

R313

220n

C327

2V85_VSIM

1000p

C329

0

R315

DNI

C326 C328

DNI

2V85_VSIM

SIM_DATA

- 27 -

3. TECHNICAL BRIEF

LGE Internal Use Only

E. LDO Block

There are 9 LDOs in the AD6726.

- 1V8_VCORE : supplies Digital baseband Processor core and AD6726 digital core(1.8V, 80mA)

- 2V8_VMEM : supplies external memory and the interface to the external memory on the digital baseband processor (2.8V, 150mA)

- 2V8_VEXT : supplies Radio digital interface and high voltage interface (2.8V, 200mA)

- 2V85_VSIM : supplies the SIM interface circuitry on the digital processor and SIM card (2.85V,1.8V, 20mA)

- 1V8_VRTC : supplies the Real-Time Clock module (1.8 V, 20 µA)

- 2V5_VMIC : supplies the microphone interface circuitry (2.5 V, 2 mA)

- 2V75_VVCXO: supplies the voltage controlled crystal oscillator ( 2.75 V, 10 mA)

- VUSB : supplies USB interface circuitry( 3.2V, 20mA)

- 1V8_VGP : supplies VDD_IO1 & VDD_IO4 of MMP(1.8V, 40mA)

- 28 -

3. TECHNICAL BRIEF

3.7 Display and Interface

Controlled by nLCD_CS, LCD_RESET, nLCD_RS, nLCD_WR, L_DATA00~L_DATA07

• L_MAIN_LCD_CS : MAIN LCD driver chip enable. MAIN LCD driver IC has own CS pin

• LCD_RESET : This pin resets LCD module. This signal comes from AD6726 directly.

• LCD_RS: This pin determines whether the data to LCD module are display data or control data.

• LCD_WR : Write control Signal

• L_DATA00~L_DATA07 : Parallel data lines.

• LCD_ID : reserved

LGE Internal Use Only

Only for training and service purposes

Properties Spec. Unit

Active Screen Size 28.032mm(W) x 35.04mm(H) mm

Color Depth 262K TFT colors

Resolution 128 X 160 Pixels

FL300 ICVE10184E150R101FR

L_DATA07

L_DATA05 L_DATA04

1

INOUT_A1

2

INOUT_A2

3

INOUT_A3

4

INOUT_A4

G15G2

INOUT_B1

INOUT_B2

INOUT_B3

INOUT_B4

10

9

8

7

6

F_DATA07 F_DATA06L_DATA06 F_DATA05 F_DATA04

ICVE10184E150R101FRFL301

L_DATA03 L_DATA02 L_DATA01 L_DATA00

1

INOUT_A1

2

INOUT_A2

3

INOUT_A3

4

INOUT_A4

G110G2

5

INOUT_B1

INOUT_B2

INOUT_B3

INOUT_B4

9

8

7

6

F_DATA03 F_DATA02 F_DATA01 F_DATA00

FL302 ICVE10184E150R101FR

1

VSYNCOUT

nLCD_WR

nLCD_RS F_nLCD_RS nLCD_CS

INOUT_A1

2

INOUT_A2

3

INOUT_A3

4

INOUT_A4

G15G2

INOUT_B1

INOUT_B2

INOUT_B3

INOUT_B4

10

9

8

7

6

F_VSYNCOUT F_nLCD_WR

F_nLCD_CS

- 29 -

3. TECHNICAL BRIEF

LGE Internal Use Only

ENBY0040501

39p

C344

DNI

C343

2V8_MM

C334 47p

VA304

R322 680

680R321

C335 1u

34

42

43

44

27

45

46

47

48

49

50

28

29

30

31

32

33

25

3

4

5

6

7

8

9

26

35

36

37

38

39

40

4110

11

12

13

14

15

16

17

18

19

2

20

21

22

23

24

CN302

1

1u

C333

VBAT

C349

39p

C348

C345

39p

47p

C336

2V5_VMIC

SPK_MICP

REC_N

UKEY_ROW3

POWERKEY

KEY_COL4

LCD_RESET

VBACKUP

UKEY_ROW2

UKEY_ROW1

MLED1

F_DATA07

F_nLCD_WR

F_DATA00MLED2

MLED

SPK_MICN

REC_P

F_VSYNCOUT

F_nLCD_RS

UKEY_ROW4

F_DATA01

LED_BC

F_DATA02

F_DATA03

F_DATA04

F_DATA05

KEY_COL3

F_nLCD_CS

UKEY_ROW0

LCD_ID

F_DATA06

Figure 3.6 LCD INTERFACE CIRCUIT

- 30 -

3. TECHNICAL BRIEF

LGE Internal Use Only

Only for training and service purposes

3.8 Camera Interface(AIT716 , U400)

This model has a built-in 1.3M SXGA (1280 x 1024) camera module. And the camera produces JPG pictures. Camera module is controlled by AIT716. Interface is done by I2C and YCbCr format. I2C is a control signal and YCbCr is real data interface signal.

Figure 3.7.1 AIT716 BLOCK DIAGRAM

- 31 -

3. TECHNICAL BRIEF

LGE Internal Use Only

Figure 3.7.2 SENSOR CHIP BLOCK DIAGRAM