LG KP550 Manual de usuario

Service Manual Model : KP502/KP550

Service Manual

KP502/KP550

Date: June, 2009 / Issue 1.0

Internal Use Only

LGE Internal Use Only

Only for training and service purposes

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* The information in this manual is subject to change without notice and should not be construed as a

commitment by LGE Inc. Furthermore, LGE Inc. reserves the right, without notice, to make changes to

equipment design as advances in engineering and manufacturing methods warrant.

* This manual provides the information necessary to install, program, operate and maintain the KP502.

REVISED HISTORY

Editor Date Issue Contents of Changes S/W Version

S.J.CHOI 4/10 0.1

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LGE Internal Use Only

Only for training and service purposes

LGE Internal Use Only

Only for training and service purposes

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1. INTRODUCTION .....................................7

1.1 Purpose .......................................................... 7

1.2 Regulatory Information.................................... 7

1.3 ABBREVIATION.............................................. 9

2. PERFORMANCE...................................11

2.1 H/W Features.................................................11

2.2 Technical specification...................................12

3. TECHNICAL BRIEF ..............................19

3.1 KP502 Functional Block diagram...................19

3.2 Baseband Processor (BBP) Introduction .......20

3.3 Power management IC ..................................32

3.4 Power ON/OFF ..............................................37

3.5 SIM & uSD interface.......................................39

3.6 Memory ..........................................................41

3.7 LCD Display ...................................................42

3.8 Keypad Switching & Scanning .......................43

3.9 Keypad back-light illumination........................44

3.10 LCD back-light illumination...........................45

3.11 JTAG & ETM interface connector ................47

3.12 Audio............................................................48

3.13 Charging circuit ............................................51

3.14 FM radio & BLUETOOTH.............................52

3.15 18pin Multi Media Interface connector .........55

3.16 Tri-axial, digital acceleration sensor..............57

3.17 General Description .....................................59

3.18 Receiver part................................................61

3.19 Transmitter part............................................62

3.20 RF synthesizer .............................................63

3.21 VCTCXO ......................................................63

3.22 Front End Module control.............................64

3.23 Power Amplifier Module ...............................65

3.24 PAM Schematic............................................66

4. PCB layout............................................67

4.1 Main PCB component placement...................67

5. Trouble shooting..................................69

5.1 Trouble shooting test setup............................69

5.2 Power on Trouble...........................................70

5.3 Charging trouble.............................................73

5.4 LCD display trouble........................................75

5.5 Camera Trouble .............................................77

5.6 Receiver & Speaker trouble ...........................79

5.7 Microphone trouble ........................................81

5.8 Vibrator trouble...............................................83

5.9 Keypad back light trouble...............................85

5.10 SIM & uSD trouble .......................................87

5.11 Touch pad trouble ........................................91

5.12 RTC trouble..................................................93

5.13 Tri-axial, digital acceleration sensor trouble.94

5.14 Trouble shooting of Receiver part................95

5.15 Trouble Shooting of Transmitter Part.........101

6. DOWNLOAD & S/W UPGRADE.............109

7. CIRCUIT DIAGRAM ............................121

8. BGM PIN MAP.....................................129

9. PCB LAYOUT......................................135

10. RF Calibration ..................................139

10.1 Test Equipment Setup................................139

10.2 Calibration Step..........................................139

11. Stand-alone Test ..............................144

11.1 Test Program Setting .................................144

11.2 Tx Test .......................................................146

11.3 Rx Test.......................................................147

12. EXPLODED VIEW & REPLACEMENT

PART LIST.........................................149

12.1 Exploded View ...........................................149

12.2 Replacement Parts.....................................151

Table Of Contents

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LGE Internal Use Only

Only for training and service purposes

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1. INTRODUCTION

1.1 Purpose

This manual provides the information necessary to repair, calibration, description and download the

features of the KP502.

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 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.

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 KF600 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 the KP502 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

LGE Internal Use Only

Only for training and service purposes

- 8 -

1. INTRODUCTION

E. Notice of Radiated Emissions

The KP502 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

An KP502 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 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.

LGE Internal Use Only

Only for training and service purposes

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1. INTRODUCTION

1.3 ABBREVIATION

For the purposes of this manual, following abbreviations apply:

LGE Internal Use Only

Only for training and service purposes

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 Internal Use Only

Only for training and service purposes

1. INTRODUCTION

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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

SIM Subscriber Identity Module

SLR Sending Loudness Rating

SRAM Static Random Access Memory

STMR Side Tone Masking Rating

TA Travel Adapter

TDD Time Division Duplex

TDMA Time Division Multiple Access

UART Universal Asynchronous Receiver/Transmitter

VCO Voltage Controlled Oscillator

VCTCXO Voltage Control Temperature Compensated Crystal Oscillator

WAP Wireless Application Protocol

8PSK 8 Phase Shift Keying

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2. GENERAL PERFORMANCE

2.1 H/W Feature

2. GENERAL PERFORMANCE

LGE Internal Use Only

Only for training and service purposes

Item Feature Comment

Standard Battery Li-ion, 900mAh

AVG TCVR Current 270mA 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 x 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 18pin multi port 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

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