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
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1. INTRODUCTION
LGE Internal Use Only
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
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1. INTRODUCTION
LGE Internal Use Only
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
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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
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2.4 HW Features
Item Feature Comment
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
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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
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2.5 SW Features
Item Feature Comment
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
Last Dial Numbers, Last Received
Numbers and Last Missed
Numbers
can store up to a total of 500.
Last Missed Number Yes
Last Dial Numbers, Last Received
Numbers and Last Missed
Numbers
can store up to a total of 500.
2.5 SW Features
2. PERFORMANCE
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Search by Number
/ Name Name
Group Yes
There is no limitation on the
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)
There is no limitation on the
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
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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
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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
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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
< -60 dBm / 3.84 MHz RW @ 1930 MHz f 1900 MHz
< -60 dBm / 3.84 MHz RW @ 2110 MHz f 2155 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
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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
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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
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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
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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
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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
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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).
3. CIC AND SERVICE CENTER
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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.
3. CIC AND SERVICE CENTER
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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.
3. CIC AND SERVICE CENTER
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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.
3. CIC AND SERVICE CENTER
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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
3. CIC AND SERVICE CENTER
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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.
3. CIC AND SERVICE CENTER
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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
- 25 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
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
- 26 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
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
- 27 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
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
- 28 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
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
- 29 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
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
- 30 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
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
- 31 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
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
- 32 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
4.4 Checking GSM TX Module(GSM PAM + ASM) Block
ANT_SEL1
VBATT(TP1)
ANT_SEL0
ANT_SEL3
ANT_SEL2
4. TROUBLE SHOOTING
- 33 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
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
- 34 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
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
- 35 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
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
- 36 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
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
- 37 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
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
- 38 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
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 TP2 Over 21dBm?
Check TP3 Over 21dBm?
Check TP4 Over 7dBm?
Check ANT_SEL 0,1,2(High, Low, Low)
4. TROUBLE SHOOTING
- 39 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
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
- 40 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
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
SDPY0004701ACMD-7407BC 2SDMY0003001B7697BC 1
[Duplexer]
BC 5 SDDY0005101B7671B7953 SDMY0002801BC 8
W900
6dB Atten.W900 Tx (880-915MHz)
W2100 Tx (1920-1980MHz)
TP1TP3TP2
4. TROUBLE SHOOTING
- 41 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
4.5.5. Checking RF Rx Level
Test Point (RF Rx Level)
TP1
TP2
TP3
TP5
Bias
4. TROUBLE SHOOTING
- 42 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
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
SDPY0004701ACMD-7407BC 2SDMY0003001B7697BC 1
[Duplexer]
BC 5 SDDY0005101B7671B7953 SDMY0002801BC 8
W900
6dB Atten.W900 Tx (880-915MHz)
W2100 Tx (1920-1980MHz)
TP2TP3
4. TROUBLE SHOOTING
- 43 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
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
- 44 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
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
- 45 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
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
- 46 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
1
2
3
4. TROUBLE SHOOTING
- 47 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
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
- 48 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
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
- 49 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
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
- 50 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
4.6.4 Checking RF Rx Block
TP1
TP2
4. TROUBLE SHOOTING
- 51 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
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
- 52 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
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
- 53 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
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
- 54 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
Reference Description
ANT9001 ANTENNA PADconnected to Carrier type antenna
U9001 BT module
U9002 WiFi module
FL9001 FEM
ANT1001
U9001
FL9001U9002
4. TROUBLE SHOOTING
- 55 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
4.8 GPS/WIFI/BT SIGNAL PATH
GPS Signal PATH (main board bottom)
GPS Rx PATH
4. TROUBLE SHOOTING
- 56 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
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
- 57 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
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
- 58 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
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
- 59 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
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
- 60 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
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
- 61 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
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
- 62 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
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
- 63 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
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
- 64 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
4. TROUBLE SHOOTING
- 65 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
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
- 66 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
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
- 67 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
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
- 68 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
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
- 69 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
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
- 70 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
TP1
FL5003
FL5001TP2
TP4TP6
TP5
4. TROUBLE SHOOTING
- 71 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
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
Change the Main board
NoCheck Power VREG_MSME_1.8V(TP1)
VREG_LCD_2.8V(TP2)
4. TROUBLE SHOOTING
- 72 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
TP1
TP2
4. TROUBLE SHOOTING
- 73 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
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
- 74 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
LGE Internal Use Only
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
- 75 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
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
Change the Main board
4. TROUBLE SHOOTING
- 76 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
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
- 77 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
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
- 78 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only LGE Internal Use Only
100n
L11001
100n
L11000
C11000
DNI
VB11000
D11000
VBAT
VIB_DRV_N
DC MOTOR
CHANGE 1215TP2
TP1
4. TROUBLE SHOOTING
- 79 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
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
- 80 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
LGE Internal Use Only
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
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
TP2BottomL10000L1001
TP1CN10002
2
1RCV_P
RCV_N
4. TROUBLE SHOOTING
- 81 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
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
Connect the phone to network equipment and set-up call.
Set-up 1KHz tone out.
No
Yes Re-Solder & Change the main PCB
No
Change the M6001 (Audio Subsystem)Yes
Change the U2001 or Change the main PCB
Can you hear the 1KHz TONE?
The sine wave appears at FB6008, FB6007(TP1)?
The sine wave appears at C6009, C6011(TP2)?
4. TROUBLE SHOOTING
- 82 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
LGE Internal Use Only
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
- 83 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
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_MIC_3.5PI_FROM_FPCB
EAR_R_FROM_FPCB
EAR_L_FROM_FPCB
change 1111 -Close to earjack conn
changes 0815
TP1
FB6008,FB6007(TP1)
4. TROUBLE SHOOTING
- 84 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
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
Connect the phone to network equipment and set-up call.
Set-up 1KHz tone out.
No
YesRe-contact or Change the SPK/RCV module
No
Change the SPK/RCV moduleYes
Change the U2001 or Change the main PCB
Can you hear the 1KHz TONE?
The Sine wave appears at C6014,C6015 pad(TP1)
The Sine wave appears at FB9003, FB9004(TP2)?
4. TROUBLE SHOOTING
- 85 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
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
- 86 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only LGE Internal Use Only
1nL11003
L11002 1n
VA11003VA11002
CN11002
2
1
TP11003TP11002
SPK_P
SPK_N
SPKCN11002
4. TROUBLE SHOOTING
- 87 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
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
- 88 - Copyright 2012 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
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
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