Lg U400 User manual

Date: July, 2006 / Issue 1.0

Service Manual Model : U400

Service Manual

U400

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1. INTRODUCTION .............................. 6

1.1 Purpose................................................... 6

1.2 Regulatory Information............................ 6

1.3 Abbreviations .......................................... 8

2. PERFORMANCE............................ 10

2.1 System Overview.................................. 10

2.2 Usable environment.............................. 11

2.3 Radio Performance............................... 11

2.4 Current Consumption............................ 19

2.5 RSSI...................................................... 19

2.6 Battery Bar............................................ 19

2.7 Sound Pressure Level........................... 20

2.8 Charging ............................................... 21

3. Technical Brief .............................. 22

3.1 Digital Baseband(DBB) & Multimedia

Processor.............................................. 22

3.1.1 General Description .........................22

3.1.2 Hardware Architecture .....................23

3.1.3 External memory interface...............27

3.1.4 RF Interface .....................................28

3.1.5 SIM Interface ...................................30

3.1.6 UART Interface ................................31

3.1.7 GPIO (General Purpose Input/Output)

map..................................................32

3.1.8 USB .................................................33

3.1.9 Slider ON/OFF Detection.................35

3.1.10 Bluetooth Interface.........................36

3.1.11 MicroSD Interface card ..................39

3.1.12 Power On Sequence......................40

3.1.13 Key Pad .........................................41

3.2 GAM Hardware Subsystem ...................43

3.2.1 General Description .........................43

3.2.2 Block Description .............................44

3.2.3 Camera & Camera Interface........... 46

3.2.4 Camera Regulator ...........................49

3.2.5 Display & LCD FPC Interface ..........50

3.2.6 LCD Backlight Illumination...............52

3.2.7 Keypad Illumination ........................ 52

3.2.8 Camera Flash LED Illumination .......53

3.3 LCD Module...........................................54

3.4 Analog Baseband (ABB) Processor.......55

3.4.1 Overview of Audio path....................55

3.4.2 Audio Signal Processing &

Interface...........................................56

3.4.3 Audio Mode..................................... 58

3.4.4 Voice Call.........................................59

3.4.5 MIDI (Ring Tone Play) .....................62

3.4.6 MP3 (Audio Player)..........................63

3.4.7 Video Telephony..............................64

3.4.8 Audio Main Component ...................64

3.4.9 GPADC(General Purpose ADC) and

AUTOADC2 .....................................65

3.4.10 Charger control ..............................66

3.4.11 Fuel Gauge ....................................67

3.4.12 Battery Temperature

Measurement.................................68

3.4.13 Charging Part.................................69

3.5 Voltage Regulation.................................72

3.5.1 Internal Regulation...........................72

3.5.2 External Regulation .........................72

3.6 General Description of RF Part..............74

3.7 GSM Mode.............................................76

3.7.1 Receiver...........................................76

3.7.2 Transmitter.......................................81

3.8 WCDMA Mode.......................................83

3.8.1 Receiver.......................................... 83

3.8.2 Transmitter.......................................86

Table of Contents

Table Of Contents

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3.8.3 Frequency Generation .....................90

4. TROUBLE SHOOTING ...................92

4.1 Power ON Trouble .................................92

4.2 USB Trouble ..........................................93

4.3 SIM Detect Trouble................................94

4.4 MicroSD card Trouble............................95

4.5 Keypad Trouble......................................96

4.6 Camera Trouble.....................................98

4.7. Main LCD Trouble...............................102

4.8 Keypad Backlight Trouble....................104

4.9 Camera Flash Trouble .........................106

4.10 Folder ON/OFF Trouble.....................108

4.11 Audio Trouble Shooting .....................110

4.11.1. Receiver......................................110

4.11.2. Speaker ......................................114

4.11.3. Microphone .................................118

4.11.4. Headset Receiver .......................122

4.11.5. Headset MIC...............................123

4.11.6. Headset ......................................124

4.12 Charger Trouble Shooting..................125

4.13 Checking Bluetooth Block..................128

4.13.1 Checking Vincenne2 Block ..........130

4.13.2 Checking Bluetooth Block............131

4.14 RF Component...................................132

4.15 Procedure to check............................134

4.16 Checking Common Power

Source Block......................................135

4.17 Checking VCXO Block.......................141

4.18 Checking Front End Module Block.....146

4.19 Checking Front End Module Block input

logic....................................................147

4.19.1 Mode Logic by TP Command ......147

4.19.2 Checking Switch Block

power source ...............................149

4.20 Checking WCDMA Block ...................156

4.20.1 Checking VCXO Block.................157

4.20.2 Checking Ant. SW module...........157

4.20.3 Checking Control Signal ..............157

4.20.4 Checking RF TX Level.................160

4.20.5 Checking PAM Block ...................164

4.20.6 Checking RX I,Q ..........................166

4.21 Checking GSM Block.........................168

4.21.1 Checking Regulator Circuit ..........169

4.21.2 Checking VCXO Block.................169

4.21.3 Checking Front End Module ........169

4.21.4 Checking Control Signal ..............170

4.21.5 Checking RF Tx Path...................172

4.21.6 Checking RF Rx Path ..................177

5. Download......................................181

5.1 The Purpose of Downloading Software181

5.2 Download Environment Setup .............181

5.3 U400 Download ...................................182

5.3.1. U400 Download(1) - Phone

Model Selection ............................182

5.3.2. U400 Download(2) - FlashRW

configuration. ................................183

5.3.3. U400 Download(3) - Download file

selection........................................185

5.3.4. U400 Download(4) - Connect &

Download......................................186

5.3.5. U400 Download(5) - USB Driver

Install.............................................187

5.3.6. U400 Download(6) -

Trouble shooting ...........................192

Table Of Contents

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6. BLOCK DIAGRAM ........................193

6.1 GSM & WCDMA RF Block...................193

7. CALIBRATION ..............................195

8. Circuit Diagram ............................205

9. CALIBRATION ..............................209

9.1 General Description .............................209

9.2 XCALMON Environment......................209

9.2.1 H/W Environment...........................209

9.2.2 S/W Environment...........................209

9.2.3 Configuration Diagram of Calibration

Environment...................................209

9.3 Calibration Explanation........................210

9.3.1 Overview........................................210

9.3.2 Calibration Items............................210

9.3.3 EGSM 900 Calibration Items .........211

9.3.4 DCS1800 Calibration Items ...........212

9.3.5 PCS1900 Calibration Items ...........213

9.3.6 WCDMA Calibration Items.............214

9.3.7 Baseband Calibration Items...........215

9.4 Program Operation ..............................216

9.4.1 XCALMON Program Overview ......216

9.4.2 XCALMON Icon Description ..........217

9.4.3 Calibration Procedure ....................220

9.4.4 Calibration Result Message...........222

10. EXPLODED VIEW &

REPLACEMENT PART LIST ..... 245

10.1 EXPLODED VIEW ............................ 245

10.2 Replacement Parts

<Mechanic component>.................... 227

<Main component> ........................... 231

10.3 Accessory ......................................... 252

1. INTRODUCTION

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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 phones 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 phones 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

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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

A 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.

1. INTRODUCTION

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1.3 Abbreviations

For the purpose 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 milliwatt

DSP Digital Signal Processing

DTC DeskTop Charger

EEPROM Electrical Erasable Programmable Read-Only Memory

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

OPLL Offset Phase Locked Loop

PAM Power Amplifier Module

PCB Printed Circuit Board

PGA Programmable Gain Amplifier

PLL Phase Locked Loop

1. INTRODUCTION

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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

UMTS Universal Mobile Telephony System

2. PERFORMANCE

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2.1 System Overview

2. PERFORMANCE

Item Specification

Shape GSM900/1800/1900 & WCDMA Slide type - Dual Mode Handset

Size 99.8 x 48 x 20.4 mm

Weight 114g under (with Standard Battery)

Power 1300mA Li-Polymer

Talk Time Over 184 Min (WCDMA, Tx=12 dBm, Voice)

Over 265 Min (GSM, Tx=Max, Voice)

Standby Time Over 280 hrs (WCDMA, DRX=1.28)

Over 330 hrs (GSM, Paging period=9)

Antenna Intenna type

Main LCD 2.0"(240x320 Dot), 260K TFT Color LCD

Main LCD BL White LED Backlight

Vibrator Yes (Coin Type)

Speaker Yes

MIC Yes (SMD Type)

Receiver Yes

Earphone Jack Yes

SIM Socket Yes(SIM Block Type) : 3.0V & 1.8V

Volume Key Push Type ( + , - )

Voice Key Push Type

External Memory T - Flash Socket

I/O Connect 24 Pin

2. PERFORMANCE

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2.2 Usable environment

1) Environment

2) Environment(Accessory)

*CLA : 12~24V (DC)

2.3 Radio Performance

1) Transmitter - GSM Mode

Item Spec. Unit

Voltage 3.7 (Typ), 3.4 (Min), (Shut Down: 3.23) V

Operating Temp. -20 ~ + 60 °C

Storage Temp. -30 ~ + 85 °C

Humidity max. 85 %

Item Spec. Min Typ. Max Unit

Power Available power 100 220 240 Vac

No Item GSM DCS/PCS

100k ~ 1GHz -39dBm 9k ~ 1GHz -39dBm

MS allocated 1G ~ 1710MHz -33dBm

Channel 1G ~ 12.75GHz -33dBm 1710M ~ 1785MHz -39dBm

Conducted 1785M ~ 12.75GHz -33dBm

1Spurious 100k ~ 880MHz -60dBm 100k ~ 880MHz -60dBm

Emission 880M ~ 915MHz -62dBm 880M ~ 915MHz -62dBm

Idle Mode 915M ~ 1000Mz -60dBm 915M ~ 1000MHz -60dBm

1G ~ 1.71GHz -50dBm 1G ~ 1.71GHz -50dBm

1.71G ~ 1.785GHz -56dBm 1.71G ~ 1.785GHz -56dBm

1.785G ~ 12.75GHz -50dBm 1.785G ~ 12.75GHz -50dBm

2. PERFORMANCE

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No Item GSM DCS/PCS

30M ~ 1GHz -36dBm 30M ~ 1GHz -36dBm

MS allocated 1G ~ 1710MHz -30dBm

Channel 1G ~ 4GHz -30dBm 1710M ~ 1785MHz -36dBm

Radiated 1785M ~ 4GHz -30dBm

1Spurious 30M ~ 880MHz -57dBm 30M ~ 880MHz -57dBm

Emission 880M ~ 915MHz -59dBm 880M ~ 915MHz -59dBm

Idle Mode 915M ~ 1000Mz -57dBm 915M ~ 1000MHz -57dBm

1G ~ 1.71GHz -47dBm 1G ~ 1.71GHz -47dBm

1.71G ~ 1.785GHz -53dBm 1.71G ~ 1.785GHz -53dBm

1.785G ~ 4GHz -47dBm 1.785G ~ 4GHz -47dBm

2Frequency Error ±0.1ppm ±0.1ppm

3Phase Error ±5(RMS) ±5(RMS)

±20(PEAK) ±20(PEAK)

3dB below reference sensitivity 3dB below reference sensitivity

Frequency Error Under RA250: ±200Hz RA250: ±250Hz

4Multipath and Interference HT100: ±100Hz HT100: ±250Hz

Condition TU50: ±100Hz TU50: ±150Hz

TU3: ±150Hz TU1.5: ±200Hz

0 ~ 100kHz +0.5dB 0 ~ 100kHz +0.5dB

200kHz -30dB 200kHz -30dB

250kHz -33dB 250kHz -31dB

Due to 400kHz -60dB 400kHz -33dB

Output RF modulation 600 ~ 1800kHz -66dB 600 ~ 1800kHz -60dB

51800 ~ 3000kHz -69dB 1800 ~ 6000kHz -60dB

Spectrum 3000 ~ 6000kHz -71dB ≥6000kHz -73dB

≥6000kHz -77dB

Due to 400kHz -19dB 400kHz -22dB

Switching 600kHz -21dB 600kHz -24dB

transient 1200kHz -21dB 1200kHz -24dB

1800kHz -24dB 1800kHz -27dB

2. PERFORMANCE

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No Item GSM DCS/PCS

Frequency offset 800kHz

7Intermodulation attenuation – Intermodulation product should

be Less than 55dB below the

level of Wanted signal

Power control

Power Tolerance

Power control

Power Tolerance

Level (dBm) (dB) Level (dBm) (dB)

533±3 030±3

631±3 128±3

729±3 226±3

827±3 324±3

925±3 422±3

10 23 ±3 5 20 ±3

8Transmitter Output Power 11 21 ±3 6 18 ±3

12 19 ±3 7 16 ±3

13 17 ±3 8 14 ±3

14 15 ±3 9 12 ±4

15 13 ±3 10 10 ±4

16 11 ±5 11 8 ±4

17 9 ±5 12 6 ±4

18 7 ±5 13 4 ±4

19 5 ±5 14 2 ±5

15 0 ±5

9Burst timing Mask IN Mask IN

2) Transmitter-WCDMA Mode

2. PERFORMANCE

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No Item Specification

1Maximum Output Power Class3: +24dBm(+1/-3dB)

Class4: +21dBm(±2dB)

2Frequency Error ±0.1ppm

3Open Loop Power control in uplink ±9dB@normal, ±12dB@extreme

Adjust output(TPC command)

cmd 1dB 2dB 3dB

+1 +0.5/1.5 +1/3 +1.5/4.5

4Inner Loop Power control in uplink 0 -0.5/+0.5 -0.5/+0.5 -0.5/+0.5

-1 -0.5/-1.5 -1/-3 -1.5/-4.5

group(10equal command group)

+1 +8/+12 +

5Minimum Output Power -50dBm(3.84MHz)

Qin/Qout:DPCCH quality levels

6Out-of-synchronization handling of output power Toff@DPCCH/lor:-22->-28dB

Ton@DPCCH/lor:-24->-18dB

7Transmit OFF Power -56dBm(3.84M)

8Transmit ON/OFF Time Mask ±25us

PRACH, CPCH, uplink compressed mode

±25us

9Change of TFC power varies according to the data rate

DTX: DPCH off

(minimize interference between UE)

10 Power setting in uplink compressed ±3dB(after 14slots transmission gap)

11 Occupied Bandwidth(OBW) 5MHz(99%)

-35-15*(∆f-2.5)dBc@∆f=2.5~3.5MHz, 30k

12 Spectrum emission Mask -35-1*(∆f-3.5)dBc@∆f=3.5~7.5MHz, 1M

-39-10*(∆f-7.5)dBc@∆f=7.5~8.5MHz, 1M

-49 dBc@∆f=8.5~12.5MHz, 1M

2. PERFORMANCE

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3)Receiver - GSM Mode

No Item Specification

13 Adjacent Channel Leakage Ratio(ACLR) 33dB@5MHz, ACP>-50dBm

43dB@10MHz, ACP>-50dBm

-36dBm@f=9~150KHz, 1k BW

-36dBm@f=150KHz~30MHz, 10k

-36dBm@f=30~1000MHz, 100k

14 Spurious Emissions -30dBm@f=1~12.75GHz, 1M

*: additional requirement -41dBm*@1893.5~1919.6MHz, 300k

-67dBm*@925~935MHz, 100k

-79dBm*@935~960MHz, 100k

-71dBm*@1805~1880MHz, 100k

15 Transmit Intermodulation -31dBc@5MHz, Interferer -40dBc

-41dBc@10MHz, Interferer -40dBc

16 Error Vector Magnitude(EVM) 17.5% (>-20dBm)

(@12.2k, 1DPDCH+1DPCCH)

17 Transmit OFF Power -15dB@SF=4, 768kbps,

multi-code transmission

No Item GSM DCS/PCS

Sensitivity (TCH/FS Class II) -105dBm -105dBm

Co-Channel Rejection C/Ic=7dB C/Ic=7dB

(TCH/FS Class II, RBER, TUhigh/FH)

3Adjacent Channel 200kHz C/Ia1=-12dB C/Ia1=-12dB

Rejection 400kHz C/Ia2=-44dB C/Ia2=-44dB

Wanted Signal: -98dBm Wanted Signal: -96dBm

Intermodulation Rejection 1’st interferer: -44dBm 1’st interferer: -44dBm

2’st interferer: -45dBm 2’st interferer: -44dBm

5Blocking Response Wanted Signal: -101dBm Wanted Signal: -101dBm

(TCH/FS Class II, RBER) Unwanted Signal: Depend on freq. Unwanted Signal: Depend on freq.

4) Receiver - WCDMA Mode

2. PERFORMANCE

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No Item Specification

18 Reference Sensivitivity Level -106.7dBm(3.84M)

-25dBm(3.84MHz)

19 Maximum Input Level -44dBm/3.84MHz(DPCH_Ec)