LG MG150 Manuel utilisateur

Service Manual Model : MG150

Date: August, 2005 / Issue 1.0

Service Manual

MG150

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 MG150.

REVISED HISTORY

DATE ISSUE CONTENTS OF CHANGES S/W VERSION

01/JUL/2005 ISSUE 1.0 Initial Release

- 3 -

1. Introduction ..................................... 5

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

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

2. General Performance...................... 9

2.1 Product Name ......................................... 9

2.2 Supporting Standard............................... 9

2.3 Main Parts............................................... 9

2.4 H/W Features........................................ 10

2.5 S/W Features ........................................ 12

3. H/W Circuit Description................ 14

3.1. General Description ............................. 14

3.2. Receiver Part ....................................... 14

3.3. Transmitter Part ................................... 17

3.4. Digital Baseband (DBB) Processor...... 21

3.5. Analog Baseband (ABB) Processor..... 26

4. TROUBLE SHOOTING .................. 45

4.1. Main Components Placement.............. 45

4.2. FPCB Components Placement ............ 46

4.3. Baseband Components ....................... 46

4.4 Main Components (Description) ........... 47

4.5. Power On Trouble................................ 48

4.6. Charging Trouble ................................. 49

4.7. LCD Display Trouble............................ 51

4.8. Receiver Trouble.................................. 53

4.9. Microphone Trouble ............................. 57

4.10. Vibrator Trouble ................................. 59

4.11. Keypad Backlight Trouble.................. 60

4.12 FOLDER Open/Close Trouble ............ 62

4.13. SIM Detect Trouble ............................ 64

4.14. Earphone Trouble .............................. 66

5. DOWNLOAD .................................. 85

5.1. Download Setup................................... 85

5.2. Download Procedure ........................... 86

6. SERVICE AND CALIBRATION...... 93

6.1. Service S/W ......................................... 93

6.2. Calibration............................................ 96

7. BLOCK DIAGRAM ....................... 100

8. CIRCUIT DIAGRAM ..................... 103

9. PCB LAYOUT ............................... 107

10. ENGINEERING MODE ............... 109

11. STANDALONE TEST ................. 110

11.1 Setting Method.................................. 110

Table of Contents

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12. EXPLODED VIEW &

REPLACEMENT PART LIST...... 111

12.1 EXPLODED VIEW ............................ 111

12.2 Replacement Parts ........................... 113

<Mechanic component>.................... 113

<Main component> ........................... 116

12.3 Accessory ......................................... 126

1. Introduction

- 5 -

1.1. Purpose

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

features of the MG150.

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 MG150 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 MG150 must be performed only by the LGE or its authorized agent.

The user may not make any changes and/or repairs expect as specifically noted in this manual.

Therefore, note that unauthorized alternations or repair may affect the regulatory status of the system

and may void any remaining warranty.

1. Introduction

- 6 -

E. Notice of Radiated Emissions

The MG150 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 MG150 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.

1. Introduction

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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 milliwatt

DSP Digital Signal Processing

EEPROM Electrical Erasable Programmable Read-Only Memory

EL Electoluminescence

ESD Electroluminesc 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

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

1. Introduction

- 8 -

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

DCXO Digitally Control Crystal Oscillator

WAP Wireless Application Protocol

2. General Performance

- 9 -

2.1 Product Name

MG150: Support GPRS (Class 10)

2.2 Supporting Standard

2.3 Main Parts: GSM Solution

2. General Performance

Item Feature Comment

GSM850/PCS1900/DCS1800

Supporting Standard with seamless handover

Phase 2+(include AMR)

SIM Toolkit : Class 1,2,3,A~E

GSM850 TX : 824 - 849 MHz

GSM850 RX : 869 - 894 MHz

Frequency Range PCS1900 TX : 1850 - 1910 MHz

PCS1900 RX : 1930 - 1990 MHz

DCS1800 TX : 1710-1785 MHz

DCS1800 RX : 1805-1880 MHz

Application Standard

WAP .2.0

JAVA 2.0

MMS

IM : WV1.1

Digital Baseband Calypso-AMR C035(D751992GHH)

Analog Baseband IOTA(TWL3025)

RF Chip Aero I+/Si4206

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