LG E612 Optimus L5 Dual service manual.pdf

Internal Use Only

Service ManualLG-E612

Date: June, 2012 / Issue 0.9

- 2 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes

LGE Internal Use Only

Table Of Contents

1. INTRODUCTION ..................................................................... 3

1.1 Purpose ........................................................................................................3

1.2 Regulatory Information .........................................................................3

2. PERFORMANCE ...................................................................... 5

2.1 Product Name ............................................................................................5

2.2 Supporting Standard ..............................................................................5

2.3 Main Parts : GSM Solution .....................................................................5

2.4 HW Features ...............................................................................................6

2.5 SW Features ................................................................................................8

2.6 HW SPEC. ................................................................................................. 11

3. CIC AND SERVICE CENTER .................................................. 18

3.1 CIC FAQ ...................................................................................................... 18

4. TROUBLE SHOOTING .......................................................... 25

4.1 RF Component ....................................................................................... 25

4.2 SIGNAL PATH ........................................................................................... 27

4.3 Checking TCXO Block ........................................................................... 30

4.4 Checking GSM TX Module(GSM PAM + ASM) Block ............... 32

4.5 Checking WCDMA Block .................................................................... 35

4.6 Checking GSM Block ............................................................................ 45

4.7 GPS/WIFI/BT RF Component ............................................................ 53

4.8 GPS/WIFI/BT SIGNAL PATH ................................................................ 55

4.9 GPS/WIFI/BT Trouble shooting ........................................................ 57

4.10 Power ON Trouble Shooting........................................................... 63

4.11 Charging Trouble Shooting ............................................................ 66

4. 12 5M AF Camera Trouble Shooting ................................................ 68

4. 13 Main LCD trouble ............................................................................... 71

4.14 Proximity Sensor on/off Trouble Shooting ............................... 73

4.15 Motion Sensor on/off Trouble Shooting ................................... 75

4.16 DC Motor Trouble Shooting ........................................................... 77

4.17 Audio Trouble ....................................................................................... 79

5. DOWNLOAD ......................................................................... 92

6.Block diagram ....................................................................112

7. CIRCUIT DIAGRAM ............................................................115

8. BGA PIN MAP .....................................................................126

9. PCB LAYOUT .......................................................................132

10. CALIBRATION ...................................................................138

11. HIDDEN MENU .................................................................158

12. EXPLODED VIEW & REPLACEMENT PART LIST .............164



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 companys employees, agents, subcontractors, or person working on your

companys 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 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



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.

2. PERFORMANCE


LGE Internal Use Only LGE Internal Use Only

2.1 Product Name E610 : WCDMA900/2100+EGSM/GSM850/DCS/PCS

(HSDPA 7.2Mbps GPRS Class 12)

2.2 Supporting Standard

Item Feature Comment

Supporting Standard WCDMA(FDD1,8)/EGSM/GSM850/DCS1800/PCS1900

with seamless handover

Phase 2+(include AMR)

SIM Toolkit: Class 1, 2, 3, C-E

Frequency Range WCDMA(FDD1) TX : 1920 1980 MHz

WCDMA(FDD1) RX : 2110 2170 MHz

WCDMA(FDD8) TX : 880~915 MHz

WCDMA(FDD8) RX : 925~960 MHz

EGSM TX: 880 915 MHz

EGSM RX: 925 960 MHz

GSM850 TX: 824 849 MHz

GSM850 RX: 869 894 MHz

DCS1800 TX : 1710 1785 MHz

DCS1800 RX: 1805 1880 MHz

PCS1900 TX: 1850 1910 MHz

PCS1900 RX: 1930 1990 MHz

Application Standard WAP 2.0

2.3 Main Parts : GSM Solution

Item Part Name Comment

Digital Baseband MSM7225A: Qualcomm

Analog Baseband PM8029 : Qualcomm

RF Chip RTR6285A : Qualcomm

2. PERFORMANCE

2.1 Product Name

2.2 Supporting Standard

E612 : WCDMA900/2100+EGSM/GSM850/DCS/PCS

(HSDPA 7.2Mbps GPRS Class 12)

2.3 Main Parts : GSM Solution

2. PERFORMANCE



2.4 HW Features


Form Factor DOP type

Battery

1) Capacity

Standard : Li-Ion , 1500mAh

2) Packing Type : Soft Pack

Size Standard :

118.3 x 66.5 x 9.88mm

Weight 120g With Battery

Volume 74.89cc

PCB L1B2 10 Layers , 0.8t

Stand by time 2G Up to 600 hrs

3G Up to 600 hrs

@ Paging Period 5 (2G)

@ DRX 7 (3G)

Charging time 3 hrs @ Power Off / 1500mAh

Talk time 2G Up to 750mins

3G Up to 600mins

@ Power Level 13 (2G)

@ Tx = 0dBm (3G)

RX sensitivity

WCDMA(FDD1) : -106.7 dBm

WCDMA(FDD8) : -104.7 dBm

EGSM : -105 dBm

GSM850 : -105 dBm

DCS 1800 : -105 dBm

PCS 1900 : -105 dBm

TX

output

power

WCDMA/

GSM/

GPRS

WCDMA : 24dBm/3.84MHz,+1/-

3dBm

EGSM : 33dBm

GSM850 : 33 dBm

DCS 1800 : 30 dBm

PCS 1900 : 30 dBm

Class3(WCDMA)

Class4 (EGSM)

Class4 (GSM850)

Class1 (PCS)

Class1 (DCS)

EDGE

GSM 900 : 27 dBm

DCS 1800 : 26 dBm

PCS 1900 : 26 dBm

E2 (GSM900)

E2 (PCS)

E2 (DCS)

GPRS compatibility GPRS Class 12

SIM card type Plug-In SIM

3V /1.8V

2.4 HW Features

2. PERFORMANCE




Display Main LCD

HVGA Main LCD(4.0, 320 x 480)

Built-in Camera 5M AF CMOS Camera

Status Indicator No

Keypad

Function key : 1

Side Key : 2

Power key : 1

Function Key:

Home, Back, Menu,

Side Key :

Volume up/down

ANT Main : Internal Fixed Type LDS type

System connector 5 Pin

Ear Phone Jack 3.5Phi, 4 Pole, Stereo

PC synchronization Yes

Memory eMMC : 4GByte

DRAM :4Gbit

Speech coding FR, EFR, HR,AMR

Data & Fax Built in Data & Fax support

Vibrator Built in Vibrator

Blue Tooth V3.0

MIDI(for Buzzer Function) SW Decoded 72Poly

Music Player MP3/ WMA/AAC/HE-AAC/EAAC+

Video Player MPEG4, H.263, H.264

Camcorder MPEG4, H.263, H.264

Voice Recording Yes

Speaker Phone mode

Support Yes

Travel Adapter Yes

CDROM No

Stereo Headset Yes Not inbox

Data Cable Yes

T-Flash

(External Memory) Yes Not inbox

2. PERFORMANCE




2.5 SW Features


RSSI 0 ~ 4 Levels

Battery Charging 0 ~ 20 Levels

Key Volume 0 ~ 7 Level

Audio Volume 0 ~ 7 Level

Time / Date Display Yes

Multi-Language Yes

English/French/German/Spanish/It

alia

n/Danish/Dutch/Korean

Quick Access Mode Dialing/ Contact / Menu / Message

PC Sync Yes

Speed Dial Yes

Profile Yes not same with feature phone

setting

CLIP / CLIR Yes

Phone Book

Name / Number / Email /

Website/Postal

addresses/Organizations/Groups/

Birthday / Ringtone

There is no limitation on the

number

of items.

It depends on

available memory amount.

Last Dial Number Yes

Last Dial Numbers, Last Received

Numbers and Last Missed

Numbers

can store up to a total of 500.

Last Received

Number Yes



Numbers


Last Missed Number Yes



Numbers


2.5 SW Features

2. PERFORMANCE



Search by Number

/ Name Name

Group Yes


number

of items. It depends on

available memory amount.

Fixed Dial Number Yes

Service Dial Number No

Own Number Yes

Read only

(add/edit/delete are not

supported)

Voice Memo Yes

Call Reminder No

Network Selection Automatic

Mute Yes

Call Divert Yes

Call Barring Yes

Call Charge (AoC) Yes

Call Duration Yes

SMS (EMS)


number of items. It depends on

available memory

amount.

EMS does not support.

SMS Over GPRS No

EMS Melody / Picture No

Send / Receive / Save No

MMS MPEG4

Send / Receive / Save Yes

Long Message MAX 2000 characters

Cell Broadcast Yes

Download Over the Web

Game No

Calendar Yes

Memo No

2. PERFORMANCE




World Clock No

Unit Convert No

Stop Watch No

Wall Paper Yes

WAP Browser No

Support only web browser based

on

webkit. WAP stack and wml are not

supported.

Download Melody /

Wallpaper Yes Over web browser

SIM Lock Yes Operator Dependent

SIM Toolkit Class 1, 2, 3, C

MMS Yes Google MMS Client

EONS No

CPHS Yes V4.2

ENS No

Camera Yes 3M FF /

Digital Zoom : x4

JAVA No

Voice Dial No

IrDa No

Bluetooth Yes Ver. 3.0

FM radio Yes

GPRS Yes Class 12

EDGE Yes Class 12

Hold / Retrieve Yes

Conference Call Yes Max. 6

DTMF Yes

Memo pad No

TTY No

AMR Yes

SyncML Yes

IM No

Email Yes

2. PERFORMANCE



2.6 HW SPEC. 1) GSM transceiver specification

Item Specification

Phase Error Rms : 5

Peak : 20

Frequency Error GSM : 0.1 ppm

DCS/PCS : 0.1 ppm

EMC(Radiated Spurious Emission

Disturbance) GSM/DCS : < -28dBm

Transmitter Output power and Burst

Timing

GSM : 5dBm 33dBm 3dB

DCS/PCS : 0dBm 30dBm 3dB

Burst Timing

2. PERFORMANCE



2) WCDMA transmitter specification

Item Specification

Transmit Frequency Band1 : 1920 MHz ~ 1980 MHz

Band8 : 880MHz ~ 915MHz

Maximum Output Power +24 dBm / 3.84 MHz, +1 / -3 dB

Frequency Error within 0.1 PPM

Open Loop Power Control Normal Conditions : within 9 dB,

Extreme Conditions : within 12 dB

Minimum Transmit Power < -50 dBm /3.84 MHz

Occupied Bandwidth < 5 MHz at 3.84 Mcps (99% of power)

Adjacent Channel Leakage

Power Ratio (ACLR)

> 33 dB @ 5 MHz,

> 43 dB @ 10 MHz

Spurious Emissions

|f-fc| > 12.5 MHz

< -36 dBm / 1 kHz RW @ 9 kHz f < 150 kHz

< -36 dBm / 10 kHz RW @ 150 KHz f < 30 MHz

< -36 dBm / 100 kHz RW @ 30 MHz f < 1 GHz

< -30 dBm / 1 MHz RW @ 1 GHz f < 12.75 GHz

< -60 dBm / 3.84 MHz RW @ 869 MHz f 894 MHz



< -67 dBm / 100 kHz RW @ 925 MHz f 935 MHz

< -79 dBm / 100 kHz RW @ 935 MHz < f 960 GHz

< -71 dBm / 100 kHz RW @ 1805 MHz f 1880 MHz

< -41 dBm / 300 kHz RW @ 1884.5 MHz < f < 1919.6 MHz

Transmit Intermodulation < -31 dBc @ 5 MHz & < -41 dBc @ 10 MHz

when Interference CW Signal Level = -40 dBc

Error Vector Magnitude < 17.5 %, when Pout -20 dBm

Peak Code Domain Error < -15 dB at Pout -20 dBm

2) WCDMA transmitter specification

2. PERFORMANCE




3) WCDMA receiver specification

Item Specification

Receive Frequency Band1 : 2110 ~ 2170 MHz

Band8 : 925~960MHz

Reference Sensitivity Level Band1 : BER < 0.001 when or = -106.7 dBm / 3.84 MHz

Band8 : BER < 0.001 when or = -103.7 dBm / 3.84 MHz

Maximum Input Level BER < 0.001 when or = -25 dBm / 3.84 MHz

Adjacent Channel Selectivity

(ACS)

ACS > 33 dB where BER < 0.001 when

or = -92.7dBm / 3.84 MHz & Ioac = 52 dBm / 3.84 MHz @ 5

MHz(Band1)

or = -89.7dBm / 3.84 MHz & Ioac = 52 dBm / 3.84 MHz @ 5

MHz(Band8)

Blocking Characteristic BER < 0.001 when or = -103.7 dBm / 3.84 MHz

& Iblocking = -56 dBm / 3.84 MHz @ Fuw(offset) = 10 MHz

or Iblocking = -44 dBm / 3.84 MHz @ Fuw(offset) = 15 MHz

Spurious Response BER < 0.001 when or = -103.7 dBm / 3.84 MHz

& Iblocking = -44 dBm

Intermodulation BER < 0.001 when or= -103.7 dBm / 3.84 MHz, or = -100.7 dBm/

3.84 MHz(Band8)

& Iouw1 = -46 dBm @ Fuw1(offset) = 10 MHz

& Iouw2 = -46 dBm / 3.84 MHz @ Fuw2(offset) = 20 MHz

Spurious Emissions < -57 dBm / 100 kHz BW @ 9 kHz f < 1 GHz

< -47 dBm / 1 MHz BW @ 1 GHz f 12.75 GHz

Inner Loop Power Control

In Uplink

Adjust output(TPC command)

cmd 1dB 2dB 3dB

+1 +0.5/1.5 +1/3 +1.5/4

0 -0.5/+0.5 -0.5/+0.5 -0.5/+0.5

-1 -0.5/-1.5 -1/-3 -1.5/-4

group(10equal command group)

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

3) WCDMA receiver specification

2. PERFORMANCE




4) HSDPA transmitter specification

Item Specification

Transmit Frequency Band1 : 1920 MHz ~ 1980 MHz

Band8 : 880MHz ~ 915MHz

Maximum Output Power Sub-Test

1=1/15, 2=12/15 21~25dBm / 3.84 MHz

3=13/15 4=15/8 20~25dBm / 3.84 MHz

5=15/7 6=15/0 19~25dBm / 3.84 MHz

HS-DPCCH

Sub-test

in table

C.10.1.4

Power

step

Power step slot

boundary

Power

step size,

P [dB]

Transmitter power step

tolerance [dB]

5

1 Start of

Ack/Nack 6 +/- 2.3

2 Start of CQI 1 +/- 0.6

3 Middle of CQI 0 +/- 0.6

4 End of CQI 5 +/- 2.3

Spectrum Emission Mask

Sub-Test : 1=1/15, 2=12/15, 3=13/15, 4=15/8, 5=15/7, 6=15/0

Frequency offset

from carrier f Minimum requirement Measurement Bandwidth

2.5 ~ 3.5 MHz -35-15(f-2.5)dBc 30 kHz

3.5 ~ 7.5 MHz -35-1(f-3.5)dBc 1 MHz

7.5 ~ 8.5 MHz -35-10(f-7.5)dBc 1 MHz

8.5 ~ 12.5 MHz -49dBc 1 MHz

Adjacent Channel Leakage

Power Ratio (ACLR)

Sub-Test : 1=1/15, 2=12/15, 3=13/15, 4=15/8, 5=15/7, 6=15/0

> 33 dB @ 5 MHz

> 43 dB @ 10 MHz

Error Vector Magnitude < 17.5 %, when Pout -20 dBm

4) HSDPA transmitter specification

2. PERFORMANCE




5) HSDPA receiver specification

Item Specification

Receive Frequency

Band1 : 2110 MHz ~ 2170 MHz

Band8 : 925 MHz ~ 960 MHz

Maximum Input Level

(BLER or R), 16QAM Only

Sub-Test : 1=1/15, 2=12/15, 3=13/15, 4=15/8, 5=15/7, 6=15/0

BLER < 10% or R >= 700kbps

6) WLAN 802.11b transceiver specification

Item Specification

Transmit Frequency 2400 MHz ~ 2483.5 MHz ( CH1~CH13 )

Tx Power Level 20dBm under (Europe), 30dBm under (USA)

Frequency Tolerance within 25 PPM

Chip clock Frequency

Tolerance

within 25 PPM

Spectrum Mask -30 @ fc-22MHz< f

2. PERFORMANCE



7) WLAN 802.11g transceiver specification

Item Specification

Transmit Frequency 2400 MHz ~ 2483.5 MHz ( CH1~CH13 )

Tx Power Level 20dBm under (Europe), 30dBm under (USA)

Frequency Tolerance within 25 PPM

Chip clock Frequency

Tolerance

within 25 PPM

Spectrum Mask -20 @ 11MHz offset (9Mhz ~ 11MHz)

-28 @ 20MHz offset (11MHz ~ 20Mhz)

-40 @ 30MHz offset (20MHz ~ 30Mhz)

Transmitter constellation error

(rms EVM)

-5dB

Spurious Emissions < -36 dBm @ 30MHz ~ 1GHz

< -30 dBm above @ 1GHz ~ 12.75GHz

< -47 dBm @ 1.8GHz ~ 1.9GHz

< -47 dBm @ 5.15GHz ~ 5.3GHz

Rx Min input Sensitivity PER 10%

-82dBm@6Mbps, -81dBm@9Mbps, -79dBm@12Mbps

-77dBm@18Mbps, -74dBm@24Mbps, -70dBm@36Mbps

-66dBm@48Mbps, -65dBm@54Mbps

Rx Max input Sensitivity -20dBm(6,9,12,18,24,36,48,54Mbps) @ PER 10%

Rx Adjacent Channel

Rejection

PER 10%, ACR 16dB@6Mbps, ACR 15dB@9Mbps,

ACR 13dB@12Mbps, ACR 11dB@18Mbps, ACR 8dB@24Mbps, ACR 4dB@36Mbps ACR 0dB@48Mbps, ACR -1dB@54Mbps

ACR shall be measured by setting the desired signal's strength 3 dB above the rate-dependent

sensitivity specified in min input sensitivity

7) WLAN 802.11g transceiver specification

2. PERFORMANCE




8) GPS receiver specification

Item Specification

Receive Frequency 1574.42 MHz ~ 1576.42 MHz

Minimum Sensitivity 1 satellite -142dBm, 7 satellites -147dBm at coarse time aiding

8) GPS receiver specification

3. CIC AND SERVICE CENTER




3.1 CIC FAQ

No FAQ Q&A

1 Q I forgot my PhoneLock password.

A

1. Applied Recovery mode. (When phone is powered off, press the bottom volume key and power key at the same time. Once LED is turned on at the bottom, press home key while releasing the keys you pressed. It goes to Recovery mode menu.)

2. Check the staff in charge of manual3. Press 3845#*612# on dial menu in normal status, go to WCDMA ONLY -> Factory

Reset will start.

1. How to disable Pattern Lock, Password and PIN. 2. Request for checking out it is specified in the user manual.3. Descriptions on HW factory reset key combination and how to do it.

2 Q What should I do to add or remove files to and from the SD card?

A 1. Connect USB - Select MTP

1.PC SD CARD2.PHONE SD CARD

3 Q 3G connection does not work properly abroad.

AOther continents except Europe, 3G can be unavailable due to the difference of frequency. But GSM connection is availble so you can call or receive SMS.

ex) 1. EuropeEurope 2. EuropeContinent(North America, Asia etc).




No FAQ Q&A

4 Q What should I do to deal with the wrong GPS location?

A

Your current location may not accurate depending on the location in use. (Open sky, indoor, semi indoor)- You may check Google location service under Open sky condition by following

Setting > Location Services > GPS satellite, Google location service- It may be less accurate under indoor/semi indoor condition if phone fails to find

satellite even after GPS satellite and Google location service.

5 Q What should I do to deal with the incompatible apps downloaded?

A 1. Uninstall

6 Q What should I do to create an email account?

AYou should check if data is available when you initiate your account. (You need to check if data is available under Wi-Fi and Local state)If data is available, you can proceed after entering ID and Password.




No FAQ Q&A

7 Q Email registration does not work.

A

1. For Exchange account, enter ID and PW and press Next button. You may have to select manually Accept all certificates

2. For POP/IMAP account, you may have to change the settings of account. You need to check if the account you are using is available for POP/IMAP. (e.g. Google Mail)

8 Q Apps not in use appear as programs in use even when I kill them.

A Preload application is not killed.




No FAQ Q&A

9 Q Wi-Fi connection does not work properly.

A

There may be many reasons that Wi-Fi is not connected. Please, check followings.1. Check if Wi-Fi is turned ON.2. AP information and the information user enter can be different.1) For your access, check security type and password of AP security information.2) AP information can be renewed. Forget the former AP by clicking and try again to

connect when AP list is newly updated.3. Check if you are trying to connect AP which requires you authorization by mobile

carriers.1) If your device is not authorized by carrier, you may not be able to

connect or use Wi-Fi.4. In case of the problem on DHCP server, dynamic IP address may not be allocated. If

so, please find AP manager.

10 Q What should I do to install the PC Sync Program?

A

Go to http://www.lgmobile.co.kr and press Smartphone next to PC initiation program on upper central part. Download LG PC Suite (for models after PRADA) or LG Mobile Sync for Android (for models before PRADA) and execute the program to install. You should install both of LG USB Driver and WIndowMediaPlayer10 or newer (for LG PC Suite).

11 Q What should I do to install the Phone Driver?

A You can download it from phone manual or the website of LG Electronics.




No FAQ Q&A

12 Q How to connect internet/data network

A

1. Data On in Setting menu. (Settings > More > Mobile networks > Data enabled > check)

2. Data On in Notification Bar. (--> Drag Notification Bar down to screen and activate Data Icon)

(Data Icon setting: Drag Notification Bar down to screen > Edit > Setting on upper right > Data enabled > check)

13 Q What should I do to connect the PC Sync program with the phone?

A

1. For USB connection : After attaching phone to PC with a USB, set USB connection type on phone as LG software and click on the connection button to PC Suite program. Desktop>Menu button>system setting>connectivity>USB connection type

2. For Wifi connection: Connect phone and PC with the same AP (same Wi-Fi)>Desktop>Menu buoon>system setting>connectivity>check the checkbox of PC Suite Wi-Fi connection below and press OK.

Search phone by pressing Wi-Fi connection button on PC Suite>Once phone is found, select it and press connection button.

14 Q Can I change the language setting?

A Settings-language input - language

15 Q What should I do for Reset and Factory Reset?

Areset : settings - back up and reset -factory data resetfactory reset : 3845#*612# - WCDMA only - factory reset




No FAQ Q&A

16 Q What should I do to change the bell sound?

A settings- sounds

17 Q Is it compatible with other devices?

A bluetooth, wifi direct, wifi

ex) 1. Bluetooth 2. other

18 Q What should I do to use HDMI?

A Not available

19 Q What should I do to solve HDMI error?

A Not available

20 Q What should I do to use SmartShare?

A Select smart share application -> Connect WiFi / WiFi direct

21 Q What should I do to deal with Smartshare error?

ASee when wifi is not connected. In case that it is not running even if network is connected, ask service center or R&D.




No FAQ Q&A

22 Q My battery runs out so fast.

ACheck if applications not in use are running (menu-app settings), Set LCD brightness down. Disable Bluetooth, WiFi, 3G Data, GPS when do not use. Use Power save mode.

23 Q What should I do to find out the schedule for new releases of OS or SW?

A Notice on the webpage of LG Electronics / Ask Service Center

24 Q What should I do to update SW?

A Visit Service Center / web download

25 Q What about the warranty period and limit?

A It is not Development department-related issue.

26 Q What kinds of phone accessories are there?

ABattery, TA, Data cable, User Guide, Ear-set, External Memory(2GB), NFC Tag -> In-box item list is different depending on region.

27 QWe ask you for more than 3 Qs&As expected regarding new products, features and other specific things.

A

Q1.For use of Dual Sim, is 3G SIM available to both SIM1 and SIM2? Yes, it is.Q2. For use of Dual Sim, can I take a new call from SIM2 during the call from SIM1?Yes, the call from SIM1 is hold and you can take new call from SIM2.Q3. For connection to N/W, can I set a connection through only one certain SIM ? Yes,On Setting menu, you can set default data network.

4. TROUBLE SHOOTING



4. TROUBLE SHOOTING

4.1 RF Component

U1001RF Transceiver

X2001VCTCXO

FL1003W2100 Rx SAW

U1005W900 PAM

FL1001DCS/PCS Rx SAW FL1002

EGSM/850 Rx SAWU1004W2100 PAM FL1005

W2100 Tx SAW

U1002GSM AM+ASM SW1001Mobile Switch

FL1004W2100 DPX

FL1008W900 DPX

4. TROUBLE SHOOTING



RF component (WCDMA / GSM)

Reference Description Reference Description

U1001 RTR6285A(Transceiver) FL1008 WCDMA (VIII) Duplexer

U1002 GSM TX Module (ASM+GSM PAM) FL1003 WCDMA (I) RX SAW Filter

U1004 WCDMA (I) PAM FL1002 EGSM/850 Rx saw filter

U1005 WCDMA (VIII) PAM FL1001 DCS/PCS Rx saw filter

FL1005 WCDMA (I) TX SAW Filter X2001 VCTCXO(19.2MHz)

FL1004 WCDMA (I) Duplexer SW1001 RF Antenna Connector

4. TROUBLE SHOOTING



4.2 SIGNAL PATH

WCDMA I and VIII Band TX Signal PATH

D2. WCDMA 2100 TX PATH

E2. WCDMA 900 TX PATH

F1. COMMON TX/RX PATH

4. TROUBLE SHOOTING



WCDMA I and VIII Band RX Signal PATH

D1. WCDMA 2100 RX PATH

E1. WCDMA 900 RX PATH

F1. COMMON TX/RX PATH

4. TROUBLE SHOOTING



GSM850/GSM900/DCS/PCSs RX/TX Signal PATH

A. GSM850/GSM900/DCS1800/PCS1900 RX PATH

B. GSM850/GSM900/DCS1800/PCS1900 TX PATH

C1. COMMON TX/RX PATH

4. TROUBLE SHOOTING



4.3 Checking TCXO BlockThe output frequency (19.2MHz) of TCXO (X2001) is used as the reference one of RTR6285A and PM8029 internal VCO.

Schematic of the Crystal Part (19.2MHz)

TP2

10n

C2021

X2001 X1G003581002700

19.2MHZ

32

65

41VC VCC

TP1 TP2

GND OUT

R2006

100

330pC2024

27pC2023

0.1u

C2009C2008

1n

330pC2022

VREG_TCXO_2.85V

TCXO_RTR_19.2MHZ

TCXO_NFC_19.2MHz

TCXO_PM_19.2MHZ

TRK_LO_ADJ

TCXO Circuit

CHANGE 1008GPS DFF was removed.

CHANGE 11.03.02Clesed to TCXO

change 0819

TP1

TP3

TP1

TP2

TP3

4. TROUBLE SHOOTING



Check TP1VCC of TCXO

VCC 2.8V Check the PM8029 No

Yes

Check TP2

2.4V Voltage 0.4V Check the MSM7225ANo

Yes

Check TP3

19.2 MHz Signal Check soldering and components

No

Yes

TCXO is OK

4. TROUBLE SHOOTING



4.4 Checking GSM TX Module(GSM PAM + ASM) Block

ANT_SEL1

VBATT(TP1)

ANT_SEL0

ANT_SEL3

ANT_SEL2

4. TROUBLE SHOOTING



Schematic of the Antenna Switch Block

Module Control and Antenna Switch Logic

ANT_SEL 3 ANT_SEL 2 ANT_SEL 1 ANT_SEL 0 Tx Module Mode

0 0 0 0 Standby

0 1 0 0 Rx1

0 0 1 0 Rx2

0 0 1 1 TRX1

0 0 0 1 TRX2

1 0 1 0 Low Band GMSK

1 0 1 1 High Band GMSK

R10

06

82

R1004

91

R10

07

82

R10

10

180

VBAT

R1009

33

R10

11

180

C102839p

R1002

2.2K C10

2010

0p10

0pC

1019

C10

1810

0p10

0pC

1017

U1002

24

17

18

19

13

12

6

53

1

2

1620

1514 4

22

11

10

9

8

7

23

21TX_EN

PGND1

GND

GND2

GND3

RX1

RX2

VRAMP

GN

D5

AN

T

GN

D6

GPCTRL0 GND7

GND8

GND1

RFI

N_L

B

RFI

N_H

B

GND4

TRX1

TRX2

GPCTRL1

VBATT

GPCTRL2

PGND2

47p

C1014

C1105 33p

C1104 100p

C101322u

GSM_PA_RAMP

ANT_SEL0ANT_SEL3

DCS_PCS_TX

GSM_TX

ANT_SEL1ANT_SEL2

GSM900(880-915MHz)GSM850(824-849MHz)

DCS(1710-1785 MHz)

PCS(1850-1910 MHz)

1608

5dB

11dB

2mm

TP1

4. TROUBLE SHOOTING



Checking Switch Block Power Source

Check ANT_SEL 0,1,2,3High Level

1.2V < Voltage < 3V Check the TP1(VBATT)No

Yes

Check the LogicIn each mode

4. TROUBLE SHOOTING



4.5 Checking WCDMA Block

START

1. Check TCXO 19.2MHz

6. Ro-download SW & Cal.

2. Check FEM Block Refer to 1.4

3. Check RF Tx Level

5. Check RF Level

4. Check PAM BlockRefer to 1.5.4

4. TROUBLE SHOOTING



4.5.1Checking TCXO Block

Refer to 4.3

4.5.2. Checking Tx Module Block

Refer to 4.4

4.5.3. Checking RF TX Level

TP1

TP2

TP4

TP3

4. TROUBLE SHOOTING



Test Point (TX Level)

For testing, Max power output is needed.

TP1

SW1002

G1

ANTG2

L1004

100n

R1001DNI

DNIC1001

DN

IL1

003

R1004

91

L100

2

1.5n

VBAT

C102839p

R1002

2.2K C10

2010

0p10

0pC

1019

C10

1810

0p10

0pC

1017

SW

1001

4213G

1 A C G2

U1002

24

17

18

19

13

12

6

53

1

2

1620

1514 4

22

11

10

9

8

7

23

21TX_EN

PGND1

GND

GND2

GND3

RX1

RX2

VRAMP

GN

D5

AN

T

GN

D6

GPCTRL0 GND7

GND8

GND1

RFI

N_L

B

RFI

N_H

B

GND4

TRX1

TRX2

GPCTRL1

VBATT

GPCTRL2

PGND2

47p

C1014

C1104 100p

L1001

1n

C101322u

GSM_PA_RAMP

ANT_SEL0ANT_SEL3

GSM_TX

ANT_SEL1ANT_SEL2

GSM850(824-849MHz)

1608

2mm

L1034 10n

DNIL1016

10nL1031

C1078

8.2n

U1004

6

7 4

8 3

5

9 2

10 1

11PGND

VCC1VCC2

RFINRFOUT

VEN

NCISO

VMODEGND

CPL

C1079

DNI

L1026

3.3nL1027

1.8n

FL1008

75

94

2

3

8

16ANT RX1

RX2

TX

GND1

GND2 GND5

GND3 GND4

L1039

1.5n

FL1007

5 3 2

4 1INOUT

G1G2G3

C1038

100p

FL1004

1950MHz,2140MHz

758492

3

16ANT RX

TX

GND1 GND6GND2 GND5GND3 GND4 2.2n

L1030

C1076

100p

C1080

DNI

C1074

2.7p L1028 1n

C1087

12n

DNI

L1032

R1023

180

R1024

180

L1044

22n

L1041

39p

L1045

6.2n

L1046

2.7p

C10

96

2.7n

C1097

18n

L1043

3.3p

C1092

6.8n

L1040

10n

L1042

39n

C1093

100p

C10

89

100p

R1022

43

L102

4

1n

C1065

6.8p

C1073

DNIFL1005

1950MHz5 3 2

4 1INOUT

G1G2G3

1n

C1070

VBAT

2.7p

C1077L1029

3.3n

R1021

49.9

C1067

10u

C1068

33p

U1003

7

43

52

61RFIN RFOUT

EN RREF

GS VCC

PG

ND

VBAT

C1084

10u

C1063

10n

R1017 27K

C1082

100p

VREG_TCXO_2.85V

C1059 10p

L1020

2n

100p

C1083

C1085

33p

C1099

100p 100p

C1100

C1086

1n

U1005

6 5

7 4

8 3

9 2

10 1

11PGND

VCC1VCC2

RFINRFOUT

VMODE_1CPL_IN

VMODE_0GND

VENCPL_OUT

C1062

100p

C1058 DNI

PA_ON0

PA_ON1

PA_R0

PA_R0

RX_WCDMA_900_M

RX_WCDMA_900_P

WCDMA_900_TX_OUT

WCDMA_2100_TX_OUT

PDET_IN

WCDMA_LB_RTX

WCDMA_HB_RTX

EXT_LNA_EN

RX_WCDMA_1900

RX_WCDMA_2100 WCDMA DUAL

SDPY0004701ACMD-7407BC 2SDMY0003001B7697BC 1

[Duplexer]

BC 5 SDDY0005101B7671B7953 SDMY0002801BC 8

W900

6dB Atten.W900 Tx (880-915MHz)

W2100 Tx (1920-1980MHz)

TP4TP3TP2

4. TROUBLE SHOOTING



RTR6285 Maximum output Power = 7 dBmRTR6285 minimum output Power = -80 dBmPAM(ACPM-5281) = Maximum input Power = 10 dBm

RF Tx Level is OKYes

No

Check PAM BlockRefer to 1.5.4

Check TX ModuleYes

No

Check DuplexerYes

No

Check RTR6285AYes

No

Check TP1 Over 21dBm?




Check ANT_SEL 0,1,2(High, Low, Low)

4. TROUBLE SHOOTING



4.5.4. Checking PAM Block

PAM Control Signal

PA_ON0 (C1085), PA_ON1(C1100) : PAM Enable

PA_R0: PAM Gain Control

PA_ON must be HIGH (over 2.6V)

PAM IN/OUT Signal :

When PAM is under the operation of high power mode (PA_R0(C1085) : Low),

PAM OUT power must be over 21 dBm

PAM IN power must be under 10 dBm

TP1

TP3TP2

4. TROUBLE SHOOTING



Set the phone Tx is On andPDM is 210

Check TP3 Over 21dBm? RF Tx Level is OKYes

No

Change the board

Check TP2 PA_RO 2.6V Check MSM7225AYes

No

Check TP1 Over 10 dBm? Check RTR6285AYes

No

L1034 10n

DNIL1016

10nL1031

C1078

8.2n

U1004

6

7 4

8 3

5

9 2

10 1

11PGND

VCC1VCC2

RFINRFOUT

VEN

NCISO

VMODEGND

CPL

C1079

DNI

L1026

3.3nL1027

1.8n

FL1008

75

94

2

3

8

16ANT RX1

RX2

TX

GND1

GND2 GND5

GND3 GND4

L1039

1.5n

FL1007

5 3 2

4 1INOUT

G1G2G3

C1038

100p

FL1004

1950MHz,2140MHz

758492

3

16ANT RX

TX

GND1 GND6GND2 GND5GND3 GND4 2.2n

L1030

C1076

100p

C1080

DNI

C1074

2.7p L1028 1n

C1087

12n

DNI

L1032

R1023

180

R1024

180

L1044

22n

L1041

39p

L1045

6.2n

L1046

2.7p

C10

96

2.7n

C1097

18n

L1043

3.3p

C1092

6.8n

L1040

10n

L1042

39n

C1093

100p

C10

89

100p

R1022

43

L102

4

1n

C1065

6.8p

C1073

DNIFL1005

1950MHz5 3 2

4 1INOUT

G1G2G3

1n

C1070

VBAT

2.7p

C1077L1029

3.3n

R1021

49.9

C1067

10u

C1068

33p

U1003

7

43

52

61RFIN RFOUT

EN RREF

GS VCC

PG

ND

VBAT

C1084

10u

C1063

10n

R1017 27K

C1082

100p

VREG_TCXO_2.85V

C1059 10p

L1020

2n

100p

C1083

C1085

33p

C1099

100p 100p

C1100

C1086

1n

U1005

6 5

7 4

8 3

9 2

10 1

11PGND

VCC1VCC2

RFINRFOUT

VMODE_1CPL_IN

VMODE_0GND

VENCPL_OUT

C1062

100p

C1058 DNI

PA_ON0

PA_ON1

PA_R0

PA_R0

RX_WCDMA_900_M

RX_WCDMA_900_P

WCDMA_900_TX_OUT

WCDMA_2100_TX_OUT

PDET_IN

WCDMA_LB_RTX

WCDMA_HB_RTX

EXT_LNA_EN

RX_WCDMA_1900

RX_WCDMA_2100 WCDMA DUAL


[Duplexer]

BC 5 SDDY0005101B7671B7953 SDMY0002801BC 8

W900


W2100 Tx (1920-1980MHz)

TP1TP3TP2

4. TROUBLE SHOOTING



4.5.5. Checking RF Rx Level

Test Point (RF Rx Level)

TP1

TP2

TP3

TP5

Bias

4. TROUBLE SHOOTING



SW1002

G1

ANTG2

L1004

100n

R1001DNI

DNIC1001

DN

IL1

003

R1004

91

L100

2

1.5n

VBAT

C102839p

R1002

2.2K C10

2010

0p10

0pC

1019

C10

1810

0p10

0pC

1017

SW

1001

4213G

1 A C G2

U1002

24

17

18

19

13

12

6

53

1

2

1620

1514 4

22

11

10

9

8

7

23

21TX_EN

PGND1

GND

GND2

GND3

RX1

RX2

VRAMP

GN

D5

AN

T

GN

D6

GPCTRL0 GND7

GND8

GND1

RFI

N_L

B

RFI

N_H

B

GND4

TRX1

TRX2

GPCTRL1

VBATT

GPCTRL2

PGND2

47p

C1014

C1104 100p

L1001

1n

C101322u

GSM_PA_RAMP

ANT_SEL0ANT_SEL3

GSM_TX

ANT_SEL1ANT_SEL2

GSM850(824-849MHz)

1608

2mm

TP1

L1034 10n

DNIL1016

10nL1031

C1078

8.2n

U1004

6

7 4

8 3

5

9 2

10 1

11PGND

VCC1VCC2

RFINRFOUT

VEN

NCISO

VMODEGND

CPL

L1026

3.3nL1027

1.8n

FL1008

75

94

2

3

8

16ANT RX1

RX2

TX

GND1

GND2 GND5

GND3 GND4

C1038

100p

FL1004

1950MHz,2140MHz

758492

3

16ANT RX

TX

GND1 GND6GND2 GND5GND3 GND4

C1080

DNI

C1074

2.7p L1028 1n

C1087

12n

DNI

L1032

R1023

180

R1024

180

L1044

22n

L1041

39p

L1045

6.2n

L1046

2.7p

C10

96

2.7n

C1097

18n

R1022

43

L102

4

1n

C1065

6.8p

1n

C1070

R1021

49.9

C1067

10u

C1068

33p

U1003

7

43

52

61RFIN RFOUT

EN RREF

GS VCC

PG

ND

C1084

10u

C1063

10n

R1017 27K

C1082

100p

VREG_TCXO_2.85V

C1059 10p

L1020

2n

100p

C1083

C1085

33p

C1099

100p 100p

C1100

C1086

1n

U1005

6 5

7 4

8 3

9 2

10 1

11PGND

VCC1VCC2

RFINRFOUT

VMODE_1CPL_IN

VMODE_0GND

VENCPL_OUT

C1062

100p

C1058 DNI

RX_WCDMA_900_M

RX_WCDMA_900_P

PDET_IN

WCDMA_LB_RTX

WCDMA_HB_RTX

EXT_LNA_EN

RX_WCDMA_1900

RX_WCDMA_2100


[Duplexer]

BC 5 SDDY0005101B7671B7953 SDMY0002801BC 8

W900


W2100 Tx (1920-1980MHz)

TP2TP3

4. TROUBLE SHOOTING



C1064 3.9p

3.9pC1075

C1069

DNI

L1022

1.8n

1.8n

L1025

1KR

1018

C10

600.

1u

100p

C10

61

0

R1019

L10218.2n

VDD_RX

C1071 33p

C1072

1p2140MHz

FL1003

52

4

31IN OUT

_OUTG1 G3

L1023 3.9n

DNI

R1020

WB2100_MIX_INM

WB2100_MIX_INPRX_WCDMA_1900_LNA_OUT

RX_WCDMA_2100_LNA_OUT

0603

0603

W2100 RX(2110 - 2170 MHz)

WCDMA RX 2100 LNA Circuit

Bias

TP5

4. TROUBLE SHOOTING



Set the phone Rx is On

Check bias block solderingNo

Yes

Change the board

Check TP1 Signal exist? Check RF Switch (M/S)No

Yes

Check TP2 Signal exist? Check TX Module Refer 1.4No

Yes

Check TP3 Signal exist? Check DuplexerNo

Yes

Check TP4 Signal exist? DNI SKIPNo

Yes

Check TP5 Signal exist? Check RTR6285 and Rx SAW filterNo

Yes

Check BIAS over 2.1 V?

4. TROUBLE SHOOTING



4.6 Checking GSM Block

START

4. Ro-download SW & Cal.

1. Check TCXO Block

2. Check Tx Module

3. Check RF TRX Level

4. TROUBLE SHOOTING



1

2

3

4. TROUBLE SHOOTING



4.6.1 Checking TCXO Block

Refer to 4.3

4.6.2 Checking Tx module Block

Refer to 4.4

4.6.3 Checking RF TX level

TP1

TP2

TP3

4. TROUBLE SHOOTING



Schematic of GSM/DCS/PCS Tx Block

SW1002

G1

ANTG2

L1004

100n

R1001DNI

DNIC1001

DN

IL1

003

R10

06

82

R1004

91

R10

07

82

L100

2

1.5n

R10

10

180

VBAT

R1009

33

R10

11

180

C102839p

R1002

2.2K C10

2010

0p10

0pC

1019

C10

1810

0p10

0pC

1017

SW

1001

4213G

1 A C G2

U1002

24

17

18

19

13

12

6

53

1

2

1620

1514 4

22

11

10

9

8

7

23

21TX_EN

PGND1

GND

GND2

GND3

RX1

RX2

VRAMP

GN

D5

AN

T

GN

D6

GPCTRL0 GND7

GND8

GND1

RFI

N_L

B

RFI

N_H

B

GND4

TRX1

TRX2

GPCTRL1

VBATT

GPCTRL2

PGND2

47p

C1014

C1105 33p

C1104 100p

L1001

1n

C101322u

GSM_PA_RAMP

WCDMA_LB_RTXWCDMA_HB_RTX

ANT_SEL0ANT_SEL3

DCS_PCS_TX

GSM_TX

ANT_SEL1ANT_SEL2

GSM900(880-915MHz)GSM850(824-849MHz)

DCS(1710-1785 MHz)

PCS(1850-1910 MHz)

1608

5dB

11dB

2mm

TP1

TP2

TP3

4. TROUBLE SHOOTING



Check TCXO Block Refer to 1.3

Check TP1If GSM over 31 dBm?

If DCS/PCS over 28 dBm?GSM/DCS/PCS Tx is OK

Check other part

Yes

No

Change the board

Check TP2, 3If GSM(TP2) under 6 dBm?

If DCS/PCS(TP3) under 6 dBm?

Check Tx Module(ASM+EDGE PAM)

Refer to 4.4

Yes

No

Check RTR & PAD Check soldering and componentsNo Problem

Still exist Problem

START

No

4. TROUBLE SHOOTING



4.6.4 Checking RF Rx Block

TP1

TP2

4. TROUBLE SHOOTING



Schematic of GSM/DCS/PCS Rx Block

L1010

7.5n

L1005

5.6n

C1029

10n

C1030

2.7p

L1013

15n

C1036

2.7p

L1012

82n

L1019

18n

C10392.2p

C10372.2p

L1018

82n

SW1002

G1

ANTG2

L1004

100n

R1001DNI

DNIC1001

L1007

5.6n

L1009 3.3n

DN

IL1

003

R10

06

82

R1004

91

R10

07

82

L100

2

1.5n

FL1001

105

8

3

72

64

9

11842_5/1960MHz

1960MHz_2

GND5 1842_5MHz_1

GND1 1842_5MHz_2

GND2

1960MHz_1

GND3 GND4

R10

10

180

VBAT

R1009

33

L1008

4.3n

R10

11

180

C102839p

R1002

2.2K C10

2010

0p10

0pC

1019

C10

1810

0p10

0pC

1017

SW

1001

4213G

1 A C G2

C1016

1.5n

L1006

4.7n

C1035

33p

FL1002

10532

64

7

8

91 IN O1_1

O1_2

O2_1

GND O2_2

C_G

1

C_G

2

C_G

3

C_G

4

L1017

10n

U1002

24

17

18

19

13

12

6

53

1

2

16201514 4

22

11

10

9

8

7

23

21TX_EN

PGND1

GND

GND2

GND3

RX1

RX2

VRAMPG

ND

5

AN

T

GN

D6

GPCTRL0 GND7

GND8

GND1

RFI

N_L

B

RFI

N_H

B

GND4

TRX1

TRX2

GPCTRL1

VBATT

GPCTRL2

PGND2

47p

C1014

C1105 33p

C1104 100p 3.3nL1011

L1001

1n

10n

C1015

C101322u

GSM_PA_RAMP

WCDMA_LB_RTXWCDMA_HB_RTX

RX_PCS_P

ANT_SEL0ANT_SEL3

DCS_PCS_TX

RX_PCS_M

RX_DCS_P

RX_DCS_M

RX_GSM_900_P

RX_GSM_900_M

RX_GSM_850_P

RX_GSM_850_M

GSM_TX

ANT_SEL1ANT_SEL2

GSM Quad

GSM900(880-915MHz)GSM850(824-849MHz)

DCS(1710-1785 MHz)

PCS(1850-1910 MHz)

1608

5dB

GSM(869-894 MHz)

PCS(1930-1990 MHz)

DCS(1805-1880 MHz)

11dB

2mm

GSM(925-960 MHz)

TP1

TP2

4. TROUBLE SHOOTING



Set the phone Rx is On

Check RF Tx Level is OK

No

Yes

Change the board

Check TP1 Signal exist??

Check TP2 Signal exist? Check Tx Module Refer to 4.4No

Yes

4. TROUBLE SHOOTING



RF Component(GPS)

Reference Description

ANT1001 ANTENNA PADconnected to Carrier type antenna

FL1006 GPS SAW FILTER

U1006 GPS LNA

4.7 GPS/WIFI/BT RF Component

ANT1001

FL1006

U1006

4. TROUBLE SHOOTING



Reference Description

ANT9001 ANTENNA PADconnected to Carrier type antenna

U9001 BT module

U9002 WiFi module

FL9001 FEM

ANT1001

U9001

FL9001U9002

4. TROUBLE SHOOTING



4.8 GPS/WIFI/BT SIGNAL PATH

GPS Signal PATH (main board bottom)

GPS Rx PATH

4. TROUBLE SHOOTING



WiFi / BT Signal PATH

BT TRx

WLAN_Tx

WLAN_Rx

WiFi / BT Tx and Rx PATH

WiFi / BT Signal PATH

WiFi / BT Tx and Rx PATH

4. TROUBLE SHOOTING



4.9 GPS/WIFI/BT Trouble shooting

4.9.1 A-GPS Block

C1088

100p

ANT1001 L1033

3.3n

L1047

3.3n

DNIC1101

L104

8D

NI

L1036

100n

L1035

12n

12

R1026

L1038

4.7n

U1006

3

2

5

4

1R

F_IN

FIL_OUT

VDD

S_D

GND

12

R1025DNIC1091

C10950.1u18p

C1094

L1037

100p

6.8pC1103

FL1006

1575.42 MHz

52

41

3G3

IN OUTG1 G2

C1090DNIL10002

100p

DNIC1102

VREG_RF_2.7V

GPS_MODE GPS_IN

WCDMA_LB_RTX

Near To LNA

LNA for the GPS

change_2012.01.03

TP2

TP1

TP1

TP2

4. TROUBLE SHOOTING



Set the phone GPS is ON

Check TP1 About 2.7V? Check power LRC filter solderingNo

Yes

Change the board

Check TP2 About 2.6V? Check SW and NV itemNo

Yes

4. TROUBLE SHOOTING



4.9.2 WLAN/BT/FM Block

START

1. Check the Power

Component Change

2. Check the Clock

3. Check the Module

3 1

32

4. TROUBLE SHOOTING



ANT9001

C9006

DNI

L900

4

2.4n

100n

C9004

100p

C90

01

DNI

C9007

C9011

10p 10p

C9012 C9013

10p C9014 22p

C9003

1.8p

FL9001

2400MHz,2500MHz

13117

1224

10986

51

3WLAN_RX

WLAN_TXBT_TRX

GND1GND2GND3GND4

TR_SW0TR_SW1TR_SW2

ANTCPL

PGND

C9015

DNI

C9009

DNI

L9001

3.9n

C9008

DNI

C9016

DNI

C9002

100p

C90

47

100p

FM_ANT

BT_WLAN_RF

BT_WLAN_RF

BT_RF_QCT

WLAN_SW_[0]WLAN_SW_[1]WLAN_SW_[2]

WLAN_PWR_DET_IN

WLAN_RF_RX

WLAN_RF_TX

ANTENNA SWITCH MODULE LOGIC

WiFi RX-ANT

WiFi TX-ANT

BT-ANT

SW0

BT/WI-FI FRONT-END

SW1 SW2

HIGH LOW

HIGH

HIGH

LOW

LOWLOW

LOW LOW

0603

0603

U9001WCN2243

EAN61966101

334353017205226272545

5151213

19

3221

55503754

10414

24

31

57404736

534258

515646

4943

292833

6

1117218982216443938482341G

ND

2G

ND

3

AG

ND

_FM

1A

GN

D_F

M2

AG

ND

_FM

3A

GN

D_F

M4

GN

D4

AG

ND

_FM

AG

ND

_BT1

AG

ND

_BT2

AG

ND

_BT3

AG

ND

_BT4

AG

ND

_BT5

AG

ND

_BT6

AG

ND

_BT7

GND1SYS_RST_NI2C_SDAI2C_SCL

FM_HRX_INFM_PRXTX_IO

FM_I2S_SDFM_I2S_WSFM_I2S_SCK

BT_PCM_INBT_PCM_CLKSLEEP_CLK

BT_UART_RXDBT_UART_TXDBT_UART_CTSBT_UART_RTS

VDD_IO

VDD_XO_BIAS

VREG_DIGVREG_ANA

VDD_LDO_IN

VDD_FM_1P3_1VDD_FM_1P3_2VDD_FM_1P3_3VDD_FM_1P3_4

VDD_DIG_1P3VDD_FM_DAC

VDD_BT_PA

VDD_BT_1P3_1VDD_BT_1P3_2VDD_BT_1P3_3VDD_BT_1P3_4

FM_R

DS

_IN

T

SY

S_C

LK

FM_L

O_L

FM_L

O_R

BT_

PC

M_O

UT

BT_

PC

M_S

YN

CB

T_C

LK_R

EQ

BT_

AC

TIV

EB

T_S

TATU

STX

_CO

NFI

RM

BT_

RFI

O

0

R9005

TP9006TP9005TP9004TP9003

C9026

DNI

R90022.2

K

L9003 82n

R90032.2

K

VREG_MSME_1.8V

C9017

10n

R9006

1MC9018

10p 10n

C9019

22p

C9005

C9020

10p

C9023

10n 10n

C9024 C9025

0.1u

+3V_WLAN_WCN

L900268n

C9010

47p

L900582n

R9001

1M

VREG_MSME_1.8V

C9021

4.7u

C9022

4.7u

C9027

10p

SLEEP_CLK

FM_L

FM_R

BT_PCM_CLK

BT_

PC

M_S

YN

C

BT_UART_CTSBT_UART_RTS

BT_PCM_OUT

BT_

PC

M_I

N

BT_RST_N

BT_UART_RXBT_UART_TX

BT_

AC

TIV

EB

T_P

RIO

RIT

YW

LAN

_AC

TIV

E

BT_

RF_

QC

T

BT_

FM_C

LK_W

CN

BT_

FM_C

LK_R

EQ

_WC

N

FM_R

DS

_IN

T

NFC_WCN_HWI2C_SDANFC_WCN_HWI2C_SCL

CHANGE 0126

BT/FM Module : WCN2243

clos

e to

pin

13

clos

e to

pin

5

clos

e to

pin

54

clos

e to

pin

37

CHANGE 1030

TP1

TP2

4. TROUBLE SHOOTING



U9002

63

33535645

7184

75

82

28

1316

615

1423

112112

1722

878041

2920

39192625

927

18SLEEP_CLK

GND_D1DNC1GND_D2GND_D3WLAN_RST_NWLAN_ACTIVE

BT_PRIORITYBT_ACTIVE

TCXO_INRF_RXPDET_IN

PA_ENWLAN_CLK_REQ

TR_SW_EN_0TR_SW_EN_1TR_SW_EN_2

SDIO_CMDSDIO_CLK

SDIO_DATA3SDIO_DATA2SDIO_DATA1SDIO_DATA0

DNC2

PLL_EXT_LPF

GND_A

RF_TX_DARF_TX_PA

GND_A1GND_A2GND_A3GND_A4

REXT

TP9013

TP9007

TP9012

TP9009TP9010TP9011

TP9014

TP9008

10K

R90

09

C9032

470p

C9037 1n

SLEEP_CLK

WLAN_CLKWLAN_CMD

WLAN_SDIO[3]WLAN_SDIO[2]WLAN_SDIO[1]WLAN_SDIO[0]

WLAN_RST_N

BT_ACTIVEBT_PRIORITY

WLAN_ACTIVE

WLAN_SW_[0]WLAN_SW_[1]WLAN_SW_[2]

WLAN_PWR_DET_INWLAN_RF_RX

WLAN_RF_TXWLAN_CLK_WCN

WLAN_CLK_REQ_WCN

Wi-Fi : WCN1314

[Figure] Schematic of WiFi /BT module

FB900275

0

R9008

C9036

220n

C9029

100n

C9044

0.1u

100p

C9033C9034

100n

100n

C9031

C9038

10n

C9041

10nDNI

C9040

100p

C9042 C9043

100p

C9045

100p

C9035

2.2u

+1V2_WLAN_WCN

C9028

10n

+1V8_WLAN_TCXO

2.2u

C9046

C9030

4.7u

+3V_WLAN_WCN

VREG_MSME_1.8V

C9039

22u

+1V3_MSM_A3_WCN

+1V2_MSM_A2_WCN

FB9001

?

U9002

7785

64

5830

43

40425557

696859

50836544617372603452

86

47373224

70

101

73

79

49627654678166

51

78

7435

4

2

8

3836

5

484631

VDD_CORE1VDD_CORE2VDD_CORE3

VDD_CORE_AON1VDD_CORE_AON2VDD_CORE_AON3

VDD_IO

VDD_FEM

VDD_SDIO

VDD_RFA1VDD_RFA2

VDD_PA

VDD_TCXO

VDD_RFA3VDD_RFA4VDD_RFA5VDD_RFA6VDD_RFA7VDD_RFA8VDD_RFA9

GND_A21

GND_D1GND_D2

GND_D3GND_D4

GND_A2

GND_D5GND_D6GND_D7GND_D8

GND_A3

GND_A4GND_D9GND_A5GND_A6GND_A7GND_A8GND_A9

GND_A10GND_A11GND_A12

GND_A13GND_A14GND_A15

GND_A16GND_A17GND_A18GND_A19

GND_A20

GND_A1GND_A22

GND_A23

VDD_RFA10VDD_RFA11

colse to pin78

WiFi : WCN 1314

0 ohm PAD removed (0125)

0 ohm PAD removed(0125)

TP3

4. TROUBLE SHOOTING



Test point Description

Test point Net name Description

TP1 +3V_WLAN_WCN Power for BT/WiFi BB core and WiFi power Amp. (V Batt)

TP2 VREG_MSME_1.8V Power for BT power Amp. (1.8V)

TP3 VREG_MSME_1.8V Power for host interface (1.8V)

START

Check the power blockNo

Yes

Board Change

Module CheckYes

No

TP1, 2, 3 is OK?

SDIO ok?UART ok?

TP2

TP1 TP3

4. TROUBLE SHOOTING



4.10 Power ON Trouble ShootingPower On sequence of E612 is :

Power key press -> KPD_PWR_N go to low -> PM8029 Power Up -> VREG_MSMC1_1.1V (L4001), VREG_MSMC2_1.1V

(L4002), VREG_MSME_1.8V (L4003), VREG_P3_2.85V (C4053), VREG_MSMA1_2.6V (C4048), VREG_MSMA2_1.2V (C4044)

VREG_TCXO_2.85V (C4049)

power ON -> Phone booting and PS_HOLD(R4037) go to High

START

Change or charging the BatteryNo

Yes

Redownload SW image

Check correctly working power keyNo

Yes

Change the Main boardNo

Yes

Change the Main boardNo

Yes

Battery voltage higher than 3.70V(OCV)?

TP1(R7013) high to lowwhen key press?

Check below power output(VREG_MSMC1_1.1V)(VREG_MSMC2_1.1V)(VREG_MSME_1.8V)

(VREG_P3_2.85V)(VREG_MSMA1_2.6V)(VREG_MSMA2_1.2V)(VREG_TCXO_2.85V)

Is clock ok?TP2 (X20001) : 19.2M

4. TROUBLE SHOOTING



4. TROUBLE SHOOTING



TP1

PS_HOLD

TP2

VREG_MSME1.8VVREG_MSMA1_2.6V

VREG_MSMC2_1.1V

VREG_MSMC1_1.1V

VREG_MSMA2_1.2V

VREG_P3_2.85V

VREG_TCXO_2.85V

4. TROUBLE SHOOTING



4.11 Charging Trouble Shooting

1. Charging Procedure

- Connect TA or u-USB Cable

- Control the charging current by LP8727-B IC

- Charging current flows into the battery

2. Check Point

- Connection of TA or USB Cable

- Charging IC (LP8727-B)

- Battery

3. Troubleshooting Setup

- Connect TA and battery to the phone

4. Troubleshooting Procedure

- Check the charger (TA or USB Cable)

- Check the OVP Circuit

- Check the Charging IC

- Check the battery

FL11001

5

6

31

42P2 P4

P1 P3

P6

P5

ZD11000

CN11001

VBUS_CHG_IN

FL11000

IN OUT

GND1 GND2

D11001

MAX_DPMAX_DM

USB_ID

u-USB Connector

VBUS 2mm 2mmTA (5.1V, 700mA)

U4005

C5

D2

B5

D3

D1

E1

E2E3

E5E4

A1

C1B1

A4A5

A3A2

D5

D4

C4

C3

C2

B2

B3

B4

SC

LS

DA

INT

GN

D1

GN

D2

GN

D3

GN

D4

BATT2

DNDP

U1U2

AUD1AUD2

MIC

VBUS1VBUS2

D-D+

ID

RES

DSS

EXPDET

CAP

BATT1

R40

34

10K

C40

82

1u

1u

C4083

TP4001

VBUS_CHG_IN

VREG_MSME_1.8V

4.7K

R40

36

C40

811u

R40

35

4.7K

C4080

1u

VBAT

GND

UART_TXUART_RX

USBH_DP

MINIABB_INT

USBH_DM

VCHG_VBUS

MINIABB_I2C_SDA

MINIABB_I2C_SCL

MAX_DM

MAX_DP

USB_ID

CHANGE 1115

Main BatteryTA

4. TROUBLE SHOOTING



Check the pin and battery connectterminals of I/O connector

Connection OK?No

Yes

Is the u-USBCable voltage 4.8V (for 5.0V)

No

Yes

Is it changing properlyAfter turning on?

START

Check MiniABB (U4005) SMT status by X-ray.

Exchange MiniABB or changethe Main board and reset.

Change I/O connector

Change TA (or u-USB cable)

ENDYes

No

Charger Troubleshoot Flow

U4005

4. TROUBLE SHOOTING



4. 12 5M AF Camera Trouble Shooting

5M camera control signals are generated by MSM7225A.

Check the camera Conn. and reconnect the camera

Camera is OK?

No

Change the Main board

ENDYes

START

Yes

Camera is OK

No

No

Yes

Change the camera

YesEND

Change the EMI Filter

No

No

Yes

MSM 7225 output signal check MCLK(TP1), Reset(TP2)

Check IOVDD(TP4), DVDD(TP5), AVDD(TP6)

Check the EMI Filter (FL5001,FL5003)

4. TROUBLE SHOOTING



10

R2008

DNI

C2026

7.5p

C2025

AR25AM24AN25AJ15AP36AN35AR33AR15AN17AM16AT32G23E25G25D24C25

GPIO_9GPIO_10GPIO_11GPIO_12GPIO_13GPIO_14GPIO_15GPIO_16GPIO_17GPIO_18GPIO_19GPIO_20GPIO_21GPIO_22GPIO_23GPIO_24GPIO_25

PA_ON1

NFC_FET_0NFC_MODE

PROX_OUT

PS_HOLD

CAM_MCLK

eMMC_DATA[5]eMMC_DATA[6]eMMC_DATA[7]

PM_INT_N

TOUCH_I2C_SDATOUCH_I2C_SCL

TOUCH_3.0V_EN

CAM_AF_2.8V_EN

PROX_I2C_SCL

SENSOR_I2C_SCL CHANGE 1024

CHANGE 1111

CHANGE 1030

MSM7225ATP1

VREG_CAM_DVDD_1.8V

0.1u

C5021

0.1u

C5005

VREG_CAM_IOVDD_1.8V

C5022

0.1u

VREG_CAM_AF_2.8V

D5002

1u

C5023

4.7K

R50

04

CN5002

1312

1411

1510

169

178

187

196

205

214

223

232

241

R50

05

4.7K

4.7u

C5024

VREG_CAM_AVDD_2.8V

0.1u

C5001

0R5018

R50190

0R5020

VREG_CAM_IOVDD_1.8V

FL5001

5

6

31

42P2 P4

P1 P3

P6

P5

FL5003

10 9

8 47 36 25 1

P1P5P2P6P3P7P4P8

G1

G2

R50210

0R5022

0R5023

CAM_MCLK

MIPI_CSI_CLKP

MIPI_CSI_DP0MIPI_CSI_DN0

MIPI_CSI_DN1MIPI_CSI_DP1

MIPI_CSI_CLKN

CAM_VCM_PWDN

CAM_RESET_N CAM_I2C_SDA

CAM_I2C_SCLCHANGE 1009

CAMERA (5M MIPI)changes 0819

changes 1006

CHANGE 1122

TP2

FL5001

FL5003

TP5

TP4

TP6

4. TROUBLE SHOOTING



TP1

FL5003

FL5001TP2

TP4TP6

TP5

4. TROUBLE SHOOTING



4. 13 Main LCD trouble

Main LCD control signals are generated by MSM7225A. Those signals path are :

MSM7225A -> LCD Module

Press Power key to tun the power On

Is the circuit powered?

Yes

Follow the Power ON trouble-shooting

No

LCD display OK?

START

No

Yes

Change the LCD Module

Disconnect and reconnect LCD connector

Yes

END


NoCheck Power VREG_MSME_1.8V(TP1)

VREG_LCD_2.8V(TP2)

4. TROUBLE SHOOTING



TP1

TP2

4. TROUBLE SHOOTING



4.14 Proximity Sensor on/off Trouble Shooting

Proximity Sensor is worked as below :

Call connected -> Object moved at the sensor -> Control the screens on/off operation automatically

MeasurementVREG_MSME_1.8VVREG_P3_2.85VPROX_OUTPROX_I2C_SCL / SDA

Call Connect & Object moved at the Proximity Sensor

LCD off?

No

No

Yes

Work well?

START

END

Change the Proximity Sensor (U1000)

No

Yes

Chang the main board

Yes

Check PROX_I2C_SDA / SCL Output & Prox_out

(TP1,2,3)

4. TROUBLE SHOOTING




D10010D10009

L10000 1n

VREG_MSME_1.8V

MIC_BIAS2_1.8V

C10004

33p27p

C10006

D10001D10000

C10005

27p

D10003D10002

VA10002

VA10000VA10001

VA10003

C10001

1u

R10006 470

1nL10001

C60

38

4.7u

470R10003

R10005 470

R10002

4.7K

R10001

4.7K

CN6002

13 12

14 11

15 10

16 9

17 8

18 7

19 6

20 5

21 4

22 3

23 2

24 1

600 FB10000

FB10001600

VREG_P3_2.85V

C10

007

DN

ID

NI

C10

008

FM_ANT

VREG_MSME_1.8V

PROX_OUT

RCV_P

RCV_N

KEY_ROW[1]

KEY_ROW[0]

MIC_2N

EAR_SENSE_3.5PI

EAR_MIC_3.5PI_FROM_FPCB

KEY_COL[1]

MIC_2P

EAR_R_FROM_FPCB

EAR_L_FROM_FPCB

PROX_I2C_SCL

PROX_I2C_SDA

FPCB_EARJACK Connector

TP1

TP2

TP1

TP2

C10000

4.7u

U10000

LEDASCL

LEDCSDA

VCCVIO

VOUTGND

R10004

10

0.1u

C10002

10

R10000

VREG_PROX_2.8VVREG_MSME_1.8V

PROX_I2C_SDA

PROX_I2C_SCL

PROX_OUT

Proximity Sensor

CHANGE 1117

U10000

TP3

4. TROUBLE SHOOTING



4.15 Motion Sensor on/off Trouble Shooting

Motion Sensor is worked as below :

Accelerometer Sensor function On -> Tilt the phone (90) -> The screen is had rotated automatic

MeasurementVREG_MSME_1.8VMOTION_INT1SENSOR_I2C_SDA / SCL

Tilt the phone

No

No

Yes

START

END

No

Yes

Accelerometer Sensor function On

Yes

No

YesThe Screen is rotated?

Check Motion_I2C_SDA/SCL output

Check Motion_INT output

Work well?

Change the Motion Sensor U7001

Change the Motion Sensor U7001


4. TROUBLE SHOOTING



TP1

R70

154.

7K

VREG_MSME_1.8V

0.1u

C7009

0.1u

C7008

R70

164.

7K

VREG_MSME_1.8V

U70012

5

14

1

13

10

11

6

3 9

812

416 15

7G

ND

1

SC

K

INT1

INT3

GN

D3

GN

D2

DRDYPS2

CS

B2

SDI

SDO

VD

D

INT2

VD

DIO

CS

B1

PS1

COMPASS_DRDY

SENSOR_I2C_SCLSENSOR_I2C_SDA

MOTION_INT1

TP2

TP3

TP1

TP3TP2

4. TROUBLE SHOOTING



4.16 DC Motor Trouble Shooting

Vibrator is worked as below

MeasurementVBATVIB_DRV_N

TP1 is same voltage as VBAT?No

Yes

Change Motor, working well ?

START

END

Change Main board

No

Yes

Vibrator is not working well

Yes

Votage is almost 3V Between TP1 and TP2

NoChange PMIC

Change Main board

4. TROUBLE SHOOTING



100n

L11001

100n

L11000

C11000

DNI

VB11000

D11000

VBAT

VIB_DRV_N

DC MOTOR

CHANGE 1215TP2

TP1

4. TROUBLE SHOOTING



4.17 Audio Trouble

4.17.1 Receiver Path

MSM7225A EAR1_OP, EAR1_ON -> RCV_P, RCV_N -> CN1002(TP1) -> L10000,L10001(TP2)

Yes

No

START

END

Connect the phone to network equipment and set-up call.

Set-up 1KHz tone out.

No

Yes Re-sloder or Change the RCV module

No

Change the ear jack FPCBYes

Change the U20001 or Change the main PCB

Can you hear the 1KHz TONE?

The sine wave appears at CN10002 (TP1) ?

The sine wave appears atL10000, L10001 (TP2)?

4. TROUBLE SHOOTING




TP2

D10010D10009

L10000 1n

VREG_MSME_1.8V

MIC_BIAS2_1.8V

C10004

33p27p

C10006

D10001D10000

C10005

27p

D10003D10002

VA10002

VA10000VA10001

VA10003

C10001

1u

R10006 470

1nL10001

C60

38

4.7u

470R10003

R10005 470

R10002

4.7K

R10001

4.7K

CN6002

13 12

14 11

15 10

16 9

17 8

18 7

19 6

20 5

21 4

22 3

23 2

24 1

600 FB10000

FB10001600

VREG_P3_2.85V

C10

007

DN

ID

NI

C10

008

FM_ANT

VREG_MSME_1.8V

PROX_OUT

RCV_P

RCV_N

KEY_ROW[1]

KEY_ROW[0]

MIC_2N

EAR_SENSE_3.5PI


KEY_COL[1]

MIC_2P

EAR_R_FROM_FPCB

EAR_L_FROM_FPCB

PROX_I2C_SCL

PROX_I2C_SDA

FPCB_EARJACK Connector

TP2BottomL10000L1001

TP1CN10002

2

1RCV_P

RCV_N

4. TROUBLE SHOOTING



4.17.2 Headset path

MSM7225A HPH_R, HPH_L -> C6009, C6011(TP2) -> M6001 (TPA2055D3: Audio Subsystem) ->

R6009, R6010 -> FB6008, FB6007(TP1) -> CN10000( 3.5pi Ear-jack )

Yes

No

START

END



No

Yes Re-Solder & Change the main PCB

No

Change the M6001 (Audio Subsystem)Yes



The sine wave appears at FB6008, FB6007(TP1)?

The sine wave appears at C6009, C6011(TP2)?

4. TROUBLE SHOOTING




C6009 2.2u

C6016 2.2u

C6018

2.2u

C6017

2.2u

0.1u

C6004

1800

FB60

02

VBAT

C6002

0.1u

VREG_MSME_1.8V

C6019

2.2u

R60

02

4.7K

VREG_MSME_1.8V

4.7K

R60

01

M6001

D3

C1

E2

A2

C2

B2

B4

A4

B3

E1

A3

D1

A1

C3

B1

E4

E3C4

D4

D2

HP

VD

D

SP

VD

D

IN3- OUT+

OUT-

HPL

IN3+

HPR

CP

IN1+

CN

IN1-

IN2+

IN2-

SDA

SCL

BIA

S

CP

VD

D

CP

VS

S

GN

D

1n

C6005

1n

C6006

C6003

4.7u

FB60

0118

00

C6014 39n

C6015 39n

C6001

2.2u

600FB9004

FB9003 600

2.2uC6011

LINE_OPLINE_ON

HPH_LHPH_R

AUDIO_I2C_SDAAUDIO_I2C_SCL

SPK_PSPK_N

EAR_L

EAR_R

Close to Audio sub system change 0908

CHANGE 1111change 0908

Delete FM RADIO 1111

CHANGE 1215

TP2

M6001

C6009,C6011(TP2)

CN1000CN10000

6

1

4

4D

5M5-MIC

M4-DETECT

M4-L

M1-R

M6-GND

EAR_LEAR_MIC_3.5PI

FM_ANT

EAR_SENSE_3.5PIEAR_R

CHANGE 1111

4. TROUBLE SHOOTING



C6029

47p 47p

C6030 D6004PESD5V0L5UK

43

52

61CAT_D1 CAT_D5

ANODE CAT_D4

CAT_D2 CAT_D3

R6009

12

1800FB6007

C6034

DNI

C6031

33p

R6010

12

FB6008 1800

1800FB6009

27n

L6003

FM_ANT

EAR_MIC_3.5PI

EAR_SENSE_3.5PI

EAR_L

EAR_R


EAR_R_FROM_FPCB

EAR_L_FROM_FPCB

change 1111 -Close to earjack conn

changes 0815

TP1

FB6008,FB6007(TP1)

4. TROUBLE SHOOTING



4.17.3 Speaker/Speaker Phone path

MSM7225A LINE_OP, LINE_ON -> C6014,C6015(TP1) -> M6001TPA2055D3 :

Audio Subsystem)-> FB9003, FB9004(TP2) -> CN11002

Yes

No

START

END



No

YesRe-contact or Change the SPK/RCV module

No

Change the SPK/RCV moduleYes



The Sine wave appears at C6014,C6015 pad(TP1)

The Sine wave appears at FB9003, FB9004(TP2)?

4. TROUBLE SHOOTING



TP1

C6009 2.2u

C6016 2.2u

C6018

2.2u

C6017

2.2u

0.1u

C6004

1800

FB60

02

VBAT

C6002

0.1u

VREG_MSME_1.8V

C6019

2.2u

R60

02

4.7K

VREG_MSME_1.8V

4.7K

R60

01

M6001

D3

C1

E2

A2

C2

B2

B4

A4

B3

E1

A3

D1

A1

C3

B1

E4

E3C4D

4

D2

HP

VD

D

SP

VD

DIN3- OUT+

OUT-

HPL

IN3+

HPR

CP

IN1+

CN

IN1-

IN2+

IN2-

SDA

SCL

BIA

S

CP

VD

D

CP

VS

S

GN

D

1n

C6005

1n

C6006

C6003

4.7u

FB60

0118

00

C6014 39n

C6015 39n

C6001

2.2u

600FB9004

FB9003 600

2.2uC6011

LINE_OPLINE_ON

HPH_LHPH_R

AUDIO_I2C_SDAAUDIO_I2C_SCL

SPK_PSPK_N

EAR_L

EAR_R

Close to Audio sub system change 0908

CHANGE 1111change 0908

Delete FM RADIO 1111

CHANGE 1215 TP2

C6014,C6015 (TP1)

FB9003,FB9004(TP2)

4. TROUBLE SHOOTING



1nL11003

L11002 1n

VA11003VA11002

CN11002

2

1

TP11003TP11002

SPK_P

SPK_N

SPKCN11002

4. TROUBLE SHOOTING



4.17.4 Main Microphone

MIC Signal: MIC1100 -> R2001,R2002 (TP2) -> C2019,C2018 (TP3) MIC1P of MSM7225A

MIC Bias: MIC_BIAS -> C2005(TP1) -> MIC1100

No

START

Change the main PCB

Make a call

Yes

No

Make some sound or voice to MIC

Yes

C2005(TP1) is about 1.8V?

Some sound signal appears at R2001, R2002 (TP2)?

Some sound signal appears at C22019,C2018 (TP3)?

Yes

Work Well?

END

Yes

Change the MIC

No Change the U200 (MSM7225A) orChange the Main PCB

4. TROUBLE SHOOTING



TP1C200510u

C20

170.

1u

C20

180.

1u

0.1u

C20

19

C2002

33p

0.1u

C2020

C2001

33p

0.1u

C20

16

0.1u

C20

11

0.1u

C20

10

MIC

_BIA

S1_

1.8V

B4

E5

E11

D8

E9

A13

B12

A7

B6

C5

A5

D6

E7

C13

C11

D14

B8

Documents

LG E612 Optimus L5 Dual service manual.pdf