LG LG-P895 User manual

Internal Use Only
Service Manual
LG-P895
Date: September, 2012 / Issue 1.0

- 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
1.3 Abbreviations.............................................................................................5
2. PERFORMANCE...................................................................... 7
2.1 Product Name............................................................................................7
2.2 Supporting Standard..............................................................................7
2.3 Main Parts : GSM Solution.....................................................................7
2.4 HW Features ...............................................................................................8
2.5 SW Features............................................................................................. 10
2.6 HW SPEC. ................................................................................................. 13
2.7 LGP895 Figures....................................................................................... 25
3.CIC AND SERVICE CENTER................................................... 26
3.1 CIC FAQ...................................................................................................... 26
4. TROUBLE SHOOTING .......................................................... 41
4.1 RF Component ....................................................................................... 41
4.2 SIGNAL PATH........................................................................................... 42
4.3 Checking TCXO Block........................................................................... 45
4.4 Checking WCDMA Block .................................................................... 47
4.5 Checking GSM Block............................................................................ 54
4.6. Wi/BT/FM Module.............................................................................. 61
4.7 NFC trouble.............................................................................................. 63
4.8 GPS trouble.............................................................................................. 67
4.9 Circuit Power ON trouble Shooting............................................... 71
4.10 Switching Charger Troubleshooting........................................... 76
4.11 USBTrouble shooting ....................................................................... 79
4.12 Audio troubleshooting..................................................................... 81
4.13 (8M) Camera troubleshooting....................................................... 91
4.14.(1.26M) Camera troubleshooting................................................. 94
4.15 Main LCD trouble................................................................................ 97
4.16 SIM detect Troubleshooting.........................................................101
4.17 Side KeyTroubleshooting.............................................................104
4.18 Vibrator Troubleshooting ..............................................................106
4.19 Motion/Gyro sensor(MPU-6050) troubleshooting..............108
4.20 Compass sensor trouble................................................................110
4.21 Proximity Sensor on/o trouble.................................................112
4.22 Illumination Sensor on/o trouble............................................115
4.23 HDMI Troubleshooting...................................................................118
4.24 Touch Troubleshooting ..................................................................119
5. DOWNLOAD.......................................................................121
6. BLOCK DIAGRAM...............................................................141
7. CIRCUIT DIAGRAM ............................................................162
8. BGA PIN MAP ....................................................................178
9. PCB LAYOUT.......................................................................189
10. CALIBRATION...................................................................195
11. HIDDEN MENU.................................................................215
12. DISASSEMBLE GUIDE......................................................239
13. EXPLODED VIEW & REPLACEMENT PART LIST .............248
13.1 EXPLODED VIEW................................................................................248
13.2 Replacement Parts ...........................................................................249
13.3 Accessory .............................................................................................292

- 3 - Copyright © 2012 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
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 company’s employees, agents, subcontractors, or person
working on your company’s behalf) can result in substantial additional charges for your
telecommunications services. System users are responsible for the security of own system. There
are may be risks of toll fraud associated with your telecommunications system. System users are
responsible for programming and configuring the equipment to prevent unauthorized use. The
manufacturer does not warrant that this product is immune from the above case but will prevent
unauthorized use of commoncarrier telecommunication service of facilities accessed through or
connected to it. The manufacturer will not be responsible for any charges that result from such
unauthorized use.
B. Incidence of Harm
If a telephone company determines that the equipment provided to customer is faulty and possibly
causing harm or interruption in service to the telephone network, it should disconnect telephone
service until repair can be done. A telephone company may temporarily disconnect service as long
as repair is not done.
C. Changes in Service
A local telephone company may make changes in its communications facilities or procedure. If
these changes could reasonably be expected to affect the use of the phones or compatibility with
the net work, the telephone company is required to give advanced written notice to the user,
allowing the user to take appropriate steps to maintain telephone service.
1. INTRODUCTION

- 4 - Copyright © 2012 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
1. INTRODUCTION
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.
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.

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Only for training and service purposes
LGE Internal Use Only
1. INTRODUCTION
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only 6/140
1.3 Abbreviations
For the purposes of this manual, following abbreviations apply:
Offset Phase Locked LoopOPLL
Light Emitting DiodeLED
Low Drop OutputLDO
Liquid Crystal DisplayLCD
Intermediate FrequencyIF
International Portable User IdentityIPUI
Global System for Mobile CommunicationsGSM
General Purpose Interface BusGPIB
Gaussian Minimum Shift KeyingGMSK
Flexible Printed Circuit BoardFPCB
Electrostatic DischargeESD
Electrical Erasable Programmable Read-Only MemoryEEPROM
Digital Signal ProcessingDSP
dB relative to 1 milli wattdBm
Digital Communication SystemDCS
Digital to Analog ConverterDAC
Constant Current – Constant VoltageCC-CV
Bit Error RatioBER
BasebandBB
Automatic Power ControlAPC
1. INTRODUCTION