LG KP110 Service Manual.pdf

KP110 SVC svc cover(5.5) 2008.2.22 1:48 PM ˘`1

Internal Use Only

Service Manual

KP110

Date: February, 2008 / Issue 1.0

Table Of Contents

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

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

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

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

5. DOWNLOAD.......................................74

5.1 Download ...............................................74

6. BLOCK DIAGRAM ..........................80

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

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

2.2 Technical Specification ..........................10

7. CIRCUIT DIAGRAM ........................81

8. BGA IC Pin Check ..........................87

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

3.1 TX module (SKY77518, U502) ..............15

3.2 Transceiver (AD6548, U503) .................17

3.3 26 MHz Clock (Crystal, X501)) ..............19

3.4 MP3 IC (VC0978BRDA, U305) ..............20

3.5 Baseband Processor (AD6724, U104)...21

3.6 Keypad Switches and Scanning ............27

3.7 Microphone ............................................28

3.8 Headset Interface...................................29

3.9 Key Back-light Illumination.....................30

3.10 LCD Back-light Illumination..................31

3.11 VIBRATOR...........................................32

3.12 FM RADIO INTERFACE ......................33

3.13 Battery Charging ..................................35

9. PCB LAYOUT ..................................91

10. ENGINEERING MODE ..................93

10.1 BB Test [MENU 1]................................94

10.2 RF Test [MENU 2]................................95

10.3 MF mode [MENU 3] .............................96

10.4 Trace option [MENU 4] ........................97

10.5 Call timer [MENU 5] .............................97

10.6 Fact. Reset [MENU 6] ..........................97

10.7 S/W version..........................................97

11. STAND ALONE TEST ...................98

11.1 Introduction ..........................................98

11.2 Setting Method.....................................98

11.3 Means of Test ......................................99

4. TROUBLE SHOOTING ...................36

4.1 RF Component.......................................36

4.2 RX Trouble.............................................37

4.3 TX Trouble .............................................40

4.4 Power On Trouble..................................44

4.5 Charging Trouble ...................................46

4.6 Vibrator Trouble .....................................48

4.7 LCD Trouble...........................................50

4.8 Speaker Trouble ....................................54

4.9 SIM Card Interface Trouble....................56

4.10 Earphone Trouble ................................58

4.11 KEY backlight Trouble .........................60

4.12 Receiver Trouble..................................62

4.13 Microphone Trouble .............................64

4.14 RTC Trouble ........................................66

4.15 FM Radio Trouble ................................68

4.16 MP3 Trouble ........................................71

12. AUTO CALIBRATION .................101

12.1 Overview ............................................101

12.2 Equipment List ...................................101

12.3 Test Jig Operation..............................102

12.4 Procedure ..........................................103

12.5 AGC ...................................................105

12.6 APC....................................................105

12.7 ADC ...................................................105

13. EXPLODED VIEW &

REPLACEMENT PART LIST ..... 107

13.1 Exploded View .................................. 107

13.2 Replacement Parts ............................109

13.3 Accessory ......................................... 121

Only for training and service purposes

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LGE Internal Use Only

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 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.

Only for training and service purposes

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LGE Internal Use Only

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

- 6 -

Only for training and service purposes

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