LG LG-P715 User manual

Internal Use Only
Service Manual
LG-P715
Date: March, 2013 / Issue 1.0

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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............................................................................................. 10
2.6 HW SPEC. ................................................................................................. 22
3. CIC AND SERVICE CENTER .................................................. 29
3.1 CIC FAQ...................................................................................................... 29
4. TROUBLE SHOOTING .......................................................... 49
4.1 RF Component ....................................................................................... 49
4.2 SIGNAL PATH........................................................................................... 51
4.3 Checking TCXO Block........................................................................... 53
4.4 Checking GSM TX Module(GSM PAM + FEM) Block................ 55
4.5 Checking WCDMA Block .................................................................... 57
4.6 Checking GSM Block............................................................................ 68
4.7 GPS/WIFI/BT RF Component ............................................................ 75
4.8 GPS/WIFI/BT SIGNAL PATH ................................................................ 77
4.9 GPS/WIFI/BT Trouble shooting ........................................................ 79
4.10 Power on Trouble shooting............................................................ 85
4.11 Charger Troubleshooting................................................................ 88
4.12 USBTrouble shooting....................................................................... 91
4.13 Audio Trouble....................................................................................... 94
4.14 SIM Detect Trouble...........................................................................112
4.15 Camera trouble..................................................................................114
4.16 Main LCD trouble..............................................................................120
4.17 Touch Key Trouble ............................................................................123
4.18 Touch sensor Trouble ......................................................................125
4.19 Side KeyTrouble Shooting............................................................127
4.20 DC Motor Trouble Shooting.........................................................129
4.21 Motion Sensor on/o Trouble Shooting.................................131
4.22 Compass Sensor on/o Trouble Shooting .............................133
4.23 Proximity Sensor on/o Trouble Shooting.............................135
5. DOWNLOAD.......................................................................137
6. BLOCK DIAGRAM...............................................................157
7. CIRCUIT DIAGRAM ............................................................164
8. BGA PIN MAP ....................................................................174
9. PCB LAYOUT.......................................................................180
10. CALIBRATION...................................................................186
11. HIDDEN MENU.................................................................206
12. DISASSEMBLE GUIDE......................................................213
13. EXPLODED VIEW & REPLACEMENT PART LIST .............223
13.1 Exploded View ...................................................................................223
13.2 Replacement Parts ...........................................................................224
13.3 Accessory .............................................................................................260

- 3 - Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
1. INTRODUCTION
3
1.1 Purpose
This manual provides the information necessary to repair, calibration, description and download the features of
this model.
1.2 Regulatory Information
A. Security
Toll fraud, the unauthorized use of telecommunications system by an unauthorized part (for example, persons
other than your company’s employees, agents, subcontractors, or person working on your company’s behalf)
can result in substantial additional charges for your telecommunications services.
System users are responsible for the security of own system. There are may be risks of toll fraud associated with
your telecommunications system. System users are responsible for programming and configuring the
equipment to prevent unauthorized use. The manufacturer does not warrant that this product is immune from
the above case but will prevent unauthorized use of common carrier telecommunication service of facilities
accessed through or connected to it. The manufacturer will not be responsible for any charges that result from
such unauthorized use.
B. Incidence of Harm
If a telephone company determines that the equipment provided to customer is faulty and possibly causing
harm or interruption in service to the telephone network, it should disconnect telephone service until repair can
be done. A telephone company may temporarily disconnect service as long as repair is not done.
C. Changes in Service
A local telephone company may make changes in its communications facilities or procedure. If these changes
could reasonably be expected to affect the use of the phones or compatibility with the 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.
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.
1. INTRODUCTION

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1. INTRODUCTION
4
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. PERFORMANCE
LG-P716 Product SPEC
1
2.1 Product Name
LG-P715 : WCDMA900/1900/2100+EGSM/GSM850/DCS/PCS
(HSDPA 7.2Mbps / GPRS Class 12 / EDGE Class 12)
2.2 Supporting Standard
Item Feature Comment
Supporting Standard
WCDMA(FDD1,2,8)/EGSM/GSM850/DCS1800/PCS1900
with seamless handover
Phase 2+(include AMR)
Frequency Range
WCDMA(FDD1) TX : 1920 – 1980 MHz
WCDMA(FDD1) RX : 2110 – 2170 MHz
WCDMA(FDD2) TX : 1850 – 1910 MHz
WCDMA(FDD2) RX : 1930 – 1990 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 MSM8225A : Qualcomm
Analog Baseband PM8029 : Qualcomm
RF Chip RTR6285A : Qualcomm
2.1 Product Name
LG-P715 : WCDMA900/1900/2100+EGSM/GSM850/DCS/PCS
(HSDPA 7.2Mbps / GPRS Class 12 / EDGE Class 12)
2.2 Supporting Standard
2.3 Main Parts : GSM Solution

2. PERFORMANCE
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LG-P716 Product SPEC
2
2.4 HW Features
Item Feature Comment
Form Factor BAR type
Battery
1) Capacity
Standard : Li-ion, 2460mAh
2) Packing Type : Soft Pack
Size Standard :
122.2 x 66.6 x 9.7 mm
Weight 115.5g With Battery
RX sensitivity
WCDMA(FDD1) : -111 dBm
WCDMA(FDD2) : -111 dBm
WCDMA(FDD8) : -111 dBm
EGSM : -108 dBm
GSM850 : -108 dBm
DCS 1800 : -108 dBm
PCS 1900 : -108 dBm
TX output power
WCDMA/
GSM/
GPRS
WCDMA :
24dBm/3.84MHz,+1/-
3dBm
EGSM : 33dBm
GSM850 : 33 dBm
DCS1800 : 30 dBm
PCS 1900: 30 dBm
EDGE compatibility GPRS Class 12
SIM card
type
EDGE Class
12 RX EDGE
Class3(WCDMA)
Class4 (EGSM)
Class4 (GSM850)
Class1 (PCS)
Class1 (DCS)
Plug-In SIM
3V /1.8V Dual SIM
E2 (GSM900)
E2 (PCS)
E2 (DCS)
Display WVGA Main LCD(4.3”, 800 x 480)
Built-in Camera 8M CMOS Camera
Status Indicator Yes
Keypad
Touch Screen
Front Key : 4
Side Key : 3
Side Key : Power On
Volume up/down
ANT Main : Internal Fixed Type
System connector 5 Pin u-USB
2.4 HW Features

2. PERFORMANCE
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LGE Internal Use Only
LG-P716 Product SPEC
3
Ear Phone Jack 3.5 pi type
PC synchronization Yes
Memory 4GB eMMC
4Gb LPDDR1
Speech coding FR, EFR, HR,AMR
Vibrator Built in Vibrator
Blue Tooth Bluetooth 3.0+EDR
MIDI(for Buzzer
Function) SW Decoded 72Poly
Music Player MP3/WMA/AAC/MIDI/EAAC+/OGG
Video Player MPEG4, H.264
Camcorder MPEG4 or H.263
Voice Recording Yes
Speaker Phone mode
Support Yes
Travel Adapter Yes
CDROM No
Stereo Headset Yes
Data Cable Yes
T-Flash
(External Memory) Yes ( Up to 32GB )
1) RSSI Display
BAR WCDMA GSM/DCS/PCS
5 Over -85 ±3dBm Over -90 ±3dBm
54 -86 ±3dBm -91 ±3dBm
43 -92 ±3dBm -97 ±3dBm
32 -98 ±3dBm -99 ±3dBm
21 -102 ±3dBm -103 ±3dBm
10 -108 ±3dBm -105 ±3dBm
Measure RSSI after 10 seconds if you change power.
LG-P716 Product SPEC
3
Ear Phone Jack 3.5 pi type
PC synchronization Yes
Memory 4GB eMMC
4Gb LPDDR1
Speech coding FR, EFR, HR,AMR
Vibrator Built in Vibrator
Blue Tooth Bluetooth 3.0+EDR
MIDI(for Buzzer
Function) SW Decoded 72Poly
Music Player
MP3/WMA/AAC/MIDI/EAAC+/OGG
Video Player MPEG4, H.264
Camcorder MPEG4 or H.263
Voice Recording Yes
Speaker Phone mode
Support Yes
Travel Adapter Yes
CDROM No
Stereo Headset Yes
Data Cable Yes
T-Flash
(External Memory) Yes ( Up to 32GB )
1) RSSI Display
BAR WCDMA GSM/DCS/PCS
5 Over -85 ±3dBm Over -90 ±3dBm
54 -86 ±3dBm -91 ±3dBm
43 -92 ±3dBm -97 ±3dBm
32 -98 ±3dBm -99 ±3dBm
21 -102 ±3dBm -103 ±3dBm
10 -108 ±3dBm -105 ±3dBm
Measure RSSI after 10 seconds if you change power.
1) RSSI Display(TBD)

2. PERFORMANCE
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LG-P716 Product SPEC
4
2) Charging Time
MAX. 3Hr 30min
3) Travel Charger
Input : 90 ~ 264 V, 50/60 Hz
Output : 5.0V, 850 mA
4) Battery Type
Li-ion Battery Pack, 2460 mAh
Standard Voltage : 3.8 V, Battery Full Charge Voltage : 4.25V ~ 4.35V
5) Current Consumption
Stand by
Voice Call VT
Bluetooth Off Bluetooth Connected
WCDMA
Only
5.0 mA under
(DRX=128)
5.5 mA under
(DRX=128)
350 mA under
(Tx=10dBm)
NA
GSM
Only
5.0 mA under
(Paging=5 period)
5.5 mA under
(Paging=5 period)
350 mA under
(Tx=Max)
Stand by Voice Call VT
WCDMA 500 hours over
(DRX = 128)
500 min over
(TX = 10dBm,
Low Pwr mode)
NA
GSM 500 hours over
(Paging Period = 9)
500 min over
(TX Level = Max)
2) Charging Time
MAX. 3Hr 30min
3) Travel Charger
Input : 90 ~ 264 V, 50/60 Hz
Output : 5.0V, 850 mA
4) Battery Type
Li-ion Battery Pack, 2460 mAh
Standard Voltage : 3.8 V, Battery Full Charge Voltage : 4.25V ~ 4.35V
5) Current Consumption

2. PERFORMANCE
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LG-P716 Product SPEC
5
6) Battery Bar
Battery Bar Specification
BAR 20 (Full) 98%
BAR 20 --> 19 98% 97%
BAR 19 --> 18 93% 92%
BAR 18 --> 17 88% 87%
BAR 17 --> 16 83% 82%
BAR 16 --> 15 78% 77%
BAR 15 --> 14 73% 72%
BAR 14 --> 13 68% 67%
BAR 13 --> 12 63% 62%
BAR 12 --> 11 58% 57%
BAR 11 --> 10 53% 52%
BAR 10 --> 9 48% 47%
BAR 9 --> 8 43% 42%
BAR 8 --> 7 38% 37%
BAR 7 --> 6 33% 32%
BAR 6 --> 5 28% 27%
BAR 5 --> 4 23% 22%
BAR 4 --> 3 16% 15%
BAR 3 --> 2 13% 12%
BAR 2 --> 1 8% 7%
BAR 1 --> 0 3% 2%
POWER OFF 0%
6) Battery Bar

2. PERFORMANCE
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10
2.5 SW Features
Function Detail Item O / X Specification Etc.
OS OS O Android 4.1.2
JB
Data Circuit X Video Telephony using
64kbps CSD
Packet O
Connectivity
Infrared (IrDA) X
Bluetooth O Ver. 3.0 + EDR
Wi-Fi O 802.11 b/g/n
USB O Ver. 2.0 HS
USB Mass storage O SD card only
RS232 X
DLNA1.5 O
Voice Function
Voice Recording O
Voice Command
X Digit Dial
X Name Dial
X Menu
X Phonebook Searching
Answering machine X Driving, Meeting, user
define(absent)
Memory User Memory
O Total 4GB eMMC/ 4Gb DDR +
external MicroSD
O Total User Memory 1.7GB (TBD) (w/o MicroSD)
O MMS
O Pictures (Still Image &
Moving Image)
O MP3 (Music Contents)
X Java Contents
O Wallpaper
O Ringtone
O external memory
(microSD)
support SDA2.0
specification, up to 32GB
2.5 SW Features