Lg U310 User manual

Date: October, 2006 / Issue 1.0

Service Manual Model : U310

Service Manual

U310

U310 SVC ENG_Cover_1003 2006.10.3 7:44 PM ˘`1

- 3 -

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

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

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

2. PERFORMANCE...............................7

2.1 System Overview .....................................7

2.2 Usable environment .................................8

2.3 Radio Performance ..................................8

2.4 Current Consumption.............................14

2.5 RSSI BAR ..............................................14

2.6 Battery BAR ...........................................14

2.7 Sound Pressure Level............................15

2.8 Charging ................................................16

3. TECHNICAL BRIEF ........................17

3.1 General Description ...............................17

3.2 GSM Mode.............................................20

3.3 WCDMA Mode .......................................23

3.4 LO Phase-locked Loop ..........................26

3.5 Off-chip RF Components .......................28

3.6 Digital Baseband(DBB/MSM6250A) ......35

3.7 Hardware Architecture ...........................36

3.8. Subsystem(MSM6250A) .......................38

3.9. External memory interface ....................41

3.10. H/W Sub System.................................42

3.11 LG-U310 Main features........................66

4. TROUBLE SHOOTING ...................72

4.1 RF Component.......................................72

4.2 SIGNAL PATH .......................................73

4.3 Checking VCTCXO Block ......................75

4.4 Checking Ant. SW Module Block ...........78

4.5 Checking WCDMA Block .......................81

4.6 Checking GSM Block .............................87

4.7 Bluetooth RF Block ................................95

4.8 Power ON Trouble .................................97

4.9 USB Trouble ..........................................99

4.10 SIM Detect Trouble ............................100

4.11 Key Sense Trouble ............................101

4.12 Camera Trouble .................................102

4.13 Main LCD Trouble..............................103

4.14 Folder ON/OFF Trouble .....................105

4.15 Camera Direction Detection Trouble..106

4.16 Trans Flash Trouble...........................107

4.17 Audio Trouble Shooting .....................108

4.18 Charger Trouble Shooting..................118

5. DOWNLOAD .................................121

5.1 Introduction ..........................................121

5.2 Downloading Procedure.......................121

5.3 Troubleshooting Download Errors .......135

5.4 Caution.................................................140

6. BLOCK DIAGRAM ........................141

6.1 GSM & WCDMA RF Block...................141

6.2 Interface Diagram ................................142

7. Circuit Diagram ............................143

8. pcb layout .....................................150

9. Calibration & RF Auto

Test Program ................................155

9.1 Configuration of HOT KIMCHI .............155

9.2 How to use HOT KIMCHI.....................159

9.3 Example for using HOT KIMCHI ..................160

10. EXPLODED VIEW &

REPLACEMENT PART LIST ..... 163

10.1 EXPLODED VIEW ............................ 163

10.2 Replacement Parts

<Mechanic component>.................... 165

<Main component> ........................... 169

10.3 Accessory ......................................... 187

Table Of Contents

- 4 -

- 5 -

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 commoncarrier

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 net

work, 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

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

- 6 -

2. PERFORMANCE

- 7 -

2.1 System Overview

2. PERFORMANCE

Item Specification

Shape GSM900/1800/1900 and WCDMA Folder Handset

Size 93.7 X 49.0 X 18.6 mm

Weight 87 g (with 800mAh Battery)

Power 4.0V normal, 800 mAh Li-Polymer

Talk Time Over 125 min (WCDMA, Tx=12 dBm, Voice)

(with 800mAh) Over 160 min (GSM, Tx=Max, Voice)

Standby Time Over 200 Hrs (WCDMA, DRX=1.28)

(with 800mAh) Over 200 Hrs (GSM, Paging period=9)

Antenna Internal type

LCD Main 176 X 220 pixel (TFT) / sub 96 X 96 pixel (OLED)

LCD Backlight White LED Back Light (Main)

Camera 1.3 Mega pixel (CMOS)

Vibrator Yes (Coin Type)

LED Indicator No

MIC Yes

Receiver Yes

Earphone Jack Yes (18 pin)

Connectivity Bluetooth, USB

Volume Key Push Type(+, -)

External Memory Trans-Flash

I/O Connect 18 Pin MMI

2.2 Usable environment

1) Environment

2) Environment (Accessory)

* CLA : 12 ~ 24 V(DC)

2.3 Radio Performance

1) Transmitter - GSM Mode

* In case of DCS : [A] -> 1710, [B] -> 1785 * In case of PCS : [A] -> 1850, [B] -> 1910

2. PERFORMANCE

- 8 -

Item Specification

Voltage 4.0 V(Typ), 3.38 V(Min), [Shut Down : 3.28 V]

Operation Temp -20 ~ +60°C

Storage Temp -20 ~ +70°C

Humidity 85 % (Max)

Reference Spec. Min Typ. Max Unit

TA Power Available power 100 220 240 Vac

No Item GSM DCS & PCS

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

MS allocated 1G~[A]MHz -33dBm

Channel 1G~12.75GHz -33dBm [A]M~[B]MHz -39dBm

Conducted [B]M~12.75GHz -33dBm

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

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

Idle Mode 915M~1GHz -60dBm 915M~1GHz -60dBm

1G~[A]MHz -50dBm 1G~[A]MHz -50dBm

[A]M~[B]MHz -56dBm [A]M~[B]MHz -56dBm

[B]M~12.5GHz -50dBm [B]M~12.5GHz -50dBm

2. PERFORMANCE

- 9 -

* In case of DCS : [A] -> 1710, [B] -> 1785 * In case of PCS : [A] -> 1850, [B] -> 1910

No Item GSM DCS & PCS

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

MS allocated 1G~[A]MHz -30dBm

Channel 1G ~ 4GHz -30dBm [A]M~[B]MHz -36dBm

Radiated [B]M~4GHz -30dBm

2Spurious 30M ~ 880MHz -57dBm 30M~880MHz -57dBm

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

Idle Mode 915M~1GHz -57dBm 915M~1GHz -57dBm

1G~[A]MHz -47dBm 1G~[A]MHz -47dBm

[A]M~[B]MHz -53dBm [A]M~[B]MHz -53dBm

[B]M~4GHz -47dBm [B]M~4GHz -47dBm

3Frequency Error ±0.1ppm ±0.1ppm

4Phase Error ±5(RMS) ±5(RMS)

±20(PEAK) ±20(PEAK)

3dB below reference sensitivity 3dB below reference sensitivity

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

5Under Multipath and HT100 : ±100Hz HT100: ±250Hz

Interference 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 -33dB

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

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

61800 ~ 3000kHz -69dB 1800 ~ 6000kHz -65dB

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

- 10 -

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. PERFORMANCE

- 11 -

2) Transmitter - WCDMA Mode

No Item Specification

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

Class 4 : +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 (10 equel command group)

+1 +8/+12 +16/+24

5Minimum Output Power -50dBm(3.84MHz)

Qin/Qout : PCCH quality levels

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

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

7Transmit OFF Power -56dBm(3.84MHz)

8Transmit ON/OFF Time Mask ±25us

PRACH,CPCH,uplinlk 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

-49dBc@∆f=8.5~12.5MHz,1M

3)Receiver - GSM Mode

2. PERFORMANCE

- 12 -

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=50KHz~30MHz, 10K BW

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

14 Spurious Emissions -30dBm@f=1~12.5GHz, 1M BW

(*: additional requirement) (*)-41dBm@f=1893.5~1919.6MHz, 300K

(*)-67dBm@f=925~935MHz, 100K BW

(*)-79dBm@f=935~960MHz, 100K BW

(*)-71dBm@f=1805~1880MHz, 100K BW

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 Storage -30 ~ +85

(TCH/FS Class II, RBER, TU high/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 1st interferer:-44dBm 1st interferer:-44dBm

2nd interferer:-45dBm 2nd interferer:-44dBm

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

(TCH/FS Class II, RBER)

Unwanted : Depend on Frequency Unwanted : Depend on Frequency

2. PERFORMANCE

- 13 -

4) Receiver - WCDMA Mode

No Item Specification

1Reference Sensitivity Level -106.7 dBm(3.84 MHz)

-25dBm(3.84MHz)

2Maximum Input Level -44dBm/3.84MHz(DPCH_Ec)