Page 1
Service Manual
Model : KP151Q
Service Manual
KP151Q
Date: September, 2008 / Issue 1.0
Internal Use Only
Page 2
- 3 -
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
The information in this manual is subject to change without notice and should not be construed as a
commitment by LGE Inc. Furthermore, LGE Inc. reserves the right, without notice, to make changes to
equipment design as advances in engineering and manufacturing methods warrant.
This manual provides the information necessary to install, program, operate and maintain the KP151Q.
REVISED HISTORY
Date Issue Contents of Changes S/W Version
Page 3
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LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 4
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LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
1. Introduction ..................................... 7
1.1 Purpose................................................... 7
1.2. Regulatory Information........................... 7
1.3 Abbreviations .......................................... 9
2. General Performance.................... 10
2.1 Product Name ....................................... 10
2.2 Supporting Standard ............................. 10
2.3 Main Parts: GSM Solution..................... 10
2.4 HW Feature........................................... 11
2.5 S/W Features .........................................13
3. HW Circuit Description................. 16
3.1 Digital Main Processor (Locosto) .......... 16
3.2 Power Amplifier Module (SKY77318) ... 22
3.3 26 MHz Clock (DCXO).......................... 23
3.4 RTC(32.768KHz Crystal) ...................... 24
3.5 LCD Interface(8-bit Parallel interface)... 25
3.6 SIM Card Interface.................................26
3.7 KEYPAD Interface .................................27
3.8 Battery Charging Block Interface ...........28
3.9 RF Interface ...........................................29
3.10 Audio Interface.....................................31
3.11 Key LED Interface................................34
3.12 Vibrator Interface .................................35
3.13 Memory Interface .................................36
3.14 Power Block Interface ..........................37
3.15 FM RADIO INTERFACE ......................39
3.16 Camera INTERFACE...........................41
4. TROUBLE SHOOTING .................. 42
4.1 Trouble Test Set-up ...............................42
4.2 RF Part Component ...............................43
4.3 RX Receiver Part ...................................46
4.4 TX Transmitter Part................................49
4.5 Power On Trouble..................................54
4.6 Charging Trouble ...................................56
4.7 RTC Trouble ..........................................58
4.8 LCD Trouble...........................................59
4.9 Speaker & Receiver Trouble..................61
4.10 Headphone Trouble .............................64
4.11 Microphone Trouble .............................66
4.12 SIM Card Trouble.................................68
4.13 KEY backlight Trouble .........................70
4.14 Vibrator Trouble ...................................72
4.15 FM RADIO Trouble ..............................74
4.16 Camera Trouble ...................................76
5. DOWNLOAD .................................. 78
5.1 Download Setup.................................... 78
5.2 Download Procedure ............................ 79
6. BLOCK DIAGRAM ......................... 86
7. CIRCUIT DIAGRAM ....................... 87
8. BGA IC Pin Check ..........................93
9. PCB LAYOUT................................. 97
10. Calibration
.......................................
101
10.1 What’s the Rx Calibration?
..............
101
10. 2 What’s the Tx Calibration?
.............
101
10.3 Calibration program-HOT_KIMCHI ..102
10.4 Calibration Setting............................103
10.5 Calibration Steps..............................103
11. EXPLODED VIEW &
REPLACEMENT PART LIST ..... 109
11.1 EXPLODED VIEW ............................ 109
11.2 Replacement Parts
<Mechanic component>.................... 111
<Main component> ............................114
11.3 Accessory ......................................... 127
Table of Contents
Page 5
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LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 6
1.1 Purpose
This manual provides the information necessary to repair, calibration, description and download the
features of the KP151Q.
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 you’re 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. LGE 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. LGE 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 KP151Q or compatibility with the
network, 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 KP151Q must be performed only by the LGE 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.
- 7 -
1. Introduction
1. Introduction
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 7
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1. Introduction
E. Notice of Radiated Emissions
The KP151Q 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
An KP151Q 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 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.
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 8
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1. Introduction
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
1.3 Abbreviations
For the purposes of this manual, following abbreviations apply:
APC Automatic Power Control
BB Baseband
BER Bit Error Ratio
CC-CV Constant Current - Constant Voltage
DAC Digital to Analog Converter
DCS Digital Communication System
dBm dB relative to 1 milliwatt
DSP Digital Signal Processing
EEPROM Electrical Erasable Programmable Read-Only Memory
EL Electroluminescence
ESD Electrostatic Discharge
FPCB Flexible Printed Circuit Board
GMSK Gaussian Minimum Shift Keying
GPIB General Purpose Interface Bus
GSM Global System for Mobile Communications
IPUI International Portable User Identity
IF Intermediate Frequency
LCD Liquid Crystal Display
LDO Low Drop Output
LED Light Emitting Diode
OPLL Offset Phase Locked Loop
PAM Power Amplifier Module
PCB Printed Circuit Board
PGA Programmable Gain Amplifier
PLL Phase Locked Loop
PSTN Public Switched Telephone Network
RF Radio Frequency
RLR Receiving Loudness Rating
RMS Root Mean Square
RTC Real Time Clock
FEM Front End Module
SIM Subscriber Identity Module
SLR Sending Loudness Rating
SRAM Static Random Access Memory
STMR Side Tone Masking Rating
TA Travel Adapter
TDD Time Division Duplex
TDMA Time Division Multiple Access
UART Universal Asynchronous Receiver/Transmitter
VCO Voltage Controlled Oscillator
VCTCXO Voltage Control Temperature Compensated Crystal Oscillator
WAP Wireless Application Protocol
Page 9
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Copyright © 2008 LG Electronics. Inc. All right reserved.
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2. General Performance
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2. General Performance
2.1 Product Name
KP151Q : Support GSM/GPRS
2.2 Supporting Standard
2.3 Main Parts: GSM Solution
Item Feature Comment
Supporting Standard EGSM/GSM850/DCS/PCS
Quad-Band (850/900/1800/1900)
with seamless handover
Phase 2+(include AMR)
SIM Toolkit : Class 1,2,3
Frequency Range GSM850 TX : 824.2 - 848.8
GSM850 RX : 869.2 - 893.8
EGSM TX : 880.2 - 914.8 MHz
EGSM RX : 925.2 - 959.8 MHz
DCS1800 TX : 1710.2 - 1784.8 MHz
DCS1800 RX : 1805.8 - 1879.8 MHz
PCS1900 TX : 1850.2 - 1909.8 MHz
PCS1900 RX : 1930.2 - 1989.8 MHz
Application Standard SMS : Yes
KP151Q
Digital Baseband TI Locosto(D6591B)
RF Chip SKY77318
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2. General Performance
2.4 HW Feature
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Item Feature Comment
Form Factor Folder type LCD : 65K CSTN, 128 x128
Battery Capacity
Standard: Li-Ion, 800mAh(Min)
Packing Type: Soft Pack
Size Standard: 88 x 47 x 18.7 mm L x W x H
Weight 80.3g With Battery
PCB One PCB :6 Layers, 0.8t
AVG TCVR Max : 225 mA (GSM, Power Level 5)
current (mA) Max : 90 mA (GSM, Power Level 19)
Standby Current 1.5 mA @ Paging Period 6
Standby time 500 hours @ Paging Period 6
Charging time Below 3 hours @ Power Off /800mAh
Talk time Min : 3.5hr@Power Level 5(GSM850) @ 800 mAh
Min : 4.5hr@Power Level 0(PCS)
RX sensitivity GSM 850 : -108 dBm Condition: conducted
DCS/PCS : -108 dBm
TX output power GSM 850 : 32.5 dBm Class4 (GSM850)
DCS/PCS : 29.5 dBm Class1 (PCS)
SIM card type Plug-In SIM 3V
Display MAIN LCD : 65K Color CSTN (128 X128)
Backlight : White LED
Keypad Alphanumeric Key : 12 Function Key:
Function Key : 10 5 Key Navigation,
5 Key Navigation, F1, F2, C, SND, END/PWR
Antenna Internal Antenna Quad-band
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2. General Performance
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Item Feature Comment
System connector 18 Pin
Ear Phone Jack 18 Pin
PC synchronization No
Memory Flash : 128Mbit / SRAM : 64Mbit Spansion
Speech coding FR, EFR, HR, AMR
Data & Fax Yes
Vibrator Built in Vibrator
MIDI (for Buzzer SW Decoded 16Poly
Function)
Voice Recording Yes 30 sec.
Travel Adapter Yes
Options Ear-Microphone TBD
Data Cable TBD
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2. General Performance
2.5 S/W Features
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Item Feature Comment
RSSI 0~5 level
Battery Charging 0~3 level
Key Volume 0~7 level
Effect sound volume 0~7 level
Audio Volume 0~7 level
Time / Date Display Yes NITZ
Multi-language Yes
English /Spanish /Portuguese
Quick Access Mode Yes U:Downloads, D:Phonebook
L:Tons&Images, R:Message
PC Sync Yes
Speed Dial Yes (2~9) Voice mail center -> 1 key
Speaker Phone Yes
CLIP / CLIR Yes
Phone Book Yes Total 500 members
Last Dial Number Yes (40)
Last Received Number Yes (40)
Last Missed Number Yes (40)
Search Number/Name Name only
Group Yes Possible Rename
Fixed Dial Number Yes
Service Dial Number Yes
Own Number Yes
Voice Memo Yes
Call Reminder Yes
Network Selection Yes
Page 13
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Copyright © 2008 LG Electronics. Inc. All right reserved.
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2. General Performance
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Item Feature Comment
Call Divert Yes
Call Barring Yes
Call Charge (AoC) Yes
Call Duration Yes
SMS Yes Max 100
EMS melody/Picture Yes
Send/ Receive/ Save
SMS Over GPRS No
E-Mail No
Long Message Yes Max. 1530 Characters
Cell Broadcast Yes
Download Melody / Yes
Wallpaper
Game Yes
Calendar Yes
Memo Pad Yes
World Clock Yes
Unit Convert Yes
Fax & Data Built in Data & Fax support
Wall Paper Yes
WAP Browser Yes
Download Yes
SIM Lock Yes Operator Dependen
SIM Toolkit Class 1, 2, 3
MMS MMS
EONS Yes
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2. General Performance
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Item Feature Comment
CPHS Yes
ENS Yes
Conference Call Yes DTMF
DTMF Yes
Page 15
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3. H/W Circuit Description
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3. HW Circuit Description
3.1 Digital Main Processor (Locosto)
Figure. 3-1 Locosto FUNCTIONAL BLOCK DIAGRAM
Page 16
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3. HW Circuit Description
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3.1.1 Overview of Locosto
The Locosto is a GSM base band modem including RF transceiver covering the low bands GSM850
/GSM900 and high bands GSM1800/GSM1900 bands. Locosto is Dual Band, therefore, it supports by
default a low / high pair of bands at the same time:
1. GSM850 / GSM1800
2. GSM850 / GSM1900
3. GSM900 / GSM1800
4. GSM900 / GSM1900
The Locosto is optimized for voice-centric Mobile Phone applications.
The Locosto is designed as a single chip solution that integrates the digital, mixed-signal, RF
functionality and a direct-to-battery Power Management Unit.
The transceiver consists of:
• Constant gain direct conversion receiver with an analog I/Q base band interface
• Fully integrated Sigma/Delta-synthesizer capability
• Fully integrated two-band RF oscillator
• Two-band digital GMSK modulator with digital TX interface
• Digitally controlled crystal oscillator generating system clocks.
The Locosto supports a direct battery connection, hence eliminating the need for an external Power
Management Unit. The Locosto has different power down modes and an integrated power up
sequencer.
The Locosto is powered by the ARM7(104MHz) MCU and C54® DSP cores.
The operating temperature range from -40°C to 85°C. It is manufactured using the 0.13 µm CMOS
process.
Page 17
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3. HW Circuit Description
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3.1.2 Features
The LOCOSTO device is an integrated solution that embeds a digital baseband(DBB) and a digital
radio processor (DRP) on the same die. The LOCOSTO device targets solutions for GSM/GPRS (lowcost global system for mobile communications/general packet radio service).
The DRP is a digital radio-frequency (RF) transceiver that supports up to a GPRS class12. The DRP is
designed for quad-band operation, supporting both the European and the US bands (E-GSM 900 and
DCS 1800 bands, GSM850 and PCS 1900 bands, respectively).
The DBB supports the processing of GSM radio signals in the switching circuit mode and the packet
data mode (GPRS) for up to class 10, including evolutions such as the SAIC and localization system
(A-GPS) in compliance with the European Telecommunications Standards Institute specification.
The LOCOSTO silicon process is a 90-nm digital CMOS technology.
The LOCOSTO device includes two versions: LOCOSTO and LOCOSTO Lite.
The LOCOSTO Lite device does not include the camera interface and the GPRS.
LOCOSTO offers the following features:
■ Dual processors:
- 104-MHz ARM7TDMI® microprocessor unit (MPU)
- 104-MHz customized digital signal processor (cDSP) c54x
■ Internal memory:
- 154KW DSP read-only memory (ROM)
- 30KW DSP static random-access memory (SRAM)
- 2.5Mb MPU SRAM
- 1.5Mb MPU ROM
■ External memory support:
- 1.8/3 V subscriber identity module (SIM) I/F
- Direct memory access (DMA) to external memory
- Burst mode, page-mode external memory: NAND and NOR flash and SRAM (frame buffer)
■ Hardware security
- Flash content
- International mobile equipment identity (IMEI) protection
- SIM lock
Page 18
■ Peripheral interfaces
- Vibrator PWM control signal
- Universal serial bus (USB) 2.0 full-speed client
- Keypad
- Universal asynchronous receiver/transmitter (UART)
- Multichannel serial interface (MCSI)
- Bluetooth
- Camera
- Primary liquid-crystal display (LCD): 8-bit parallel interface Up to QVGA (quarter video graphics
array) 256K colors
- Secondary LCD: Serial interface
■ DRP2.0 RF integrated RF:
- Digital RF 4 band GSM/GPRS up to Class 12 (On the LOCOSTO Lite device, GSM is dual-band
muxed and GPRS is not available.)
- -110 dBm sensitivity
- Digital PA driver output level +2 dBm
- 0.7 degrees RMS phase error
- Integrated digitally controlled crystal oscillator (DCXO)
■ Software support:
- GSM/GPRS layer 1,2,3 (GPRS is not available on LOCOSTO Lite.)
- Adaptive multirate (AMR), full rate (FR), half rate (HR), enhanced full rate (EFR)
- Teletypewriter (TTY)
- SAIC over GSM
- Man machine interface (MMI) for test
- Wireless application protocol (WAP), enhanced message service(EMS), multimedia message
service (MMS), JAVA
■ Multimedia support:
- Internal 300 KP camera support
- MP3 player
- Up to 32 polyphonies stereo midi player
- Up to 32 polyphonies mono midi ringer
- JPEG encode and decode
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. HW Circuit Description
- 19 -
Page 19
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3. HW Circuit Description
- 20 -
The LOCOSTO device communicates with the analog TWL3031 external subsystem, which provides
the following capabilities:
- Handset microphone and speaker
- Headset mono/stereo audio speakers and microphone connection
- Melody ringer (hands-free) and buzzer
- Battery pack (Nimh/Li-ion) and six 7-V regulated or 20-V nonregulated charger
- Vibrator motor control
- Real-time clock (RTC) 32-kHz crystal
The following external/extra subsystems are also supported:
- TI-Bluetooth (BRF6150) wireless short-distance connectivity
- Voice/audio and data
- TI-AGPS/TWL5002 localization system (I/F provision)
- Digital camera systems (not available on LOCOSTO Lite)
- VGA camera sensor/module, for example, AGILENT ADCM-2700 (not available on LOCOSTO
Lite)
- OMAP-DMxx(GoldenEye) camera companion chip (up to 3M-pixel) (not available on LOCOSTO
Lite)
- UART cable or IrDA (infrared data association)
- Boot-manufacturing capability from the USB link
- FM radio receiver (for example, Philips TEA5767/68)
- Primary (Qcif) and secondary LCD
- NAND flash-based media storage (for example, on-board SmartMedia)
- USB carkit
Page 20
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3. HW Circuit Description
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3.1.3 Asynchronous Operation Mode Concept
The Locosto can operate in either:
• The traditional synchronous mode with the 26MHz system clock synchronized on the base station
• A special asynchronous mode (XO concept).
In the asynchronous mode the 26MHz clock input is not synchronized with the base station; the
residual frequency offset is compensated in the digital signal processing domain. This processing
includes frequency and timing compensation of the baseband and voiceband signals.
3.1.4 Receiver Antenna Bar Display
RSSI Range (dBm)Antenna Bar
Over -92 ± 2 (dBm)
( -93 〜 -100 ) ± 2 (dBm)
skip
( -101 〜 -103) ± 2 (dBm)
( -104 〜 -105) ± 2 (dBm)
Less -106 ± 2 (dBm)
Page 21
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3.2 Power Amplifier Module (SKY77318)
The module consists of separate GSM PA and DCS1800/PCS1900 PA blocks, impedance-matching
circuitry for 50 Ω input and output impedances and a Power Amplifier Control (PAC) block with an
internal current-sense resistor. The custom BiCMOS integrated circuit provides the internal PAC
function and interface circuitry. Fabricated onto a single Gallium Arsenide (GaAs) die, one
Heterojunction Bipolar Transistor (HBT) PA block supports the GSM bands and the other supports the
DCS1800 and PCS1900 bands. Both PA blocks share common power supply pins to distribute
current.
The GaAs die, the Silicon (Si) die, and the passive components are mounted on a multi-layer laminate
substrate. The assembly is encapsulated with plastic overmold. RF input and output ports of the
SKY77318 are internally matched to a 50 Ω load to reduce the number of external components for a
quad-band design. Extremely low leakage current (2.5 µA, typical) of the dual PA module maximizes
handset standby time. The SKY77318 also contains band select switching circuitry to select GSM
(logic 0) or DCS/PCS (logic 1) as determined from the Band Select (BS) signal.
In Figure 1 below, the BS pin selects the PA output (DCS/PCS_OUT or GSM_OUT) and the Analog
Power Control (VAPC) controls the level of output power.
The VBATT pin connects to an internal current-sense resistor and interfaces to an integrated power
amplifier control (iPAC™) function, which is insensitive to variations in temperature, power supply,
process, and input power.
The ENABLE input allows initial turn-on of PAM circuitry to minimize battery drain. The SKY77318
Power Amplifier Module (PAM) is designed in a low profile (1.2 mm), compact form factor for quadband cellular handsets comprising GSM850/900, DCS1800, and PCS1900 operation.
The PAM also supports Class 12 General Packet Radio Service (GPRS) multi-slot operation.
3. HW Circuit Description
- 22 -
Figure. 3-2 SKY77318 FUNCTIONAL BLOCK DIAGRAM
Page 22
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3.3 26 MHz Clock (DCXO)
DCXO (Digitally Controlled Crystal Oscillator) and VCTCXO (Voltage Controlled Temperature
Compensated Crystal Oscillator) are two different techniques used to maintain the mobile’s reference
oscillator’s accuracy over time. The reference oscillator’s accuracy over time will vary due to initial
crystal frequency offset, temperature drift and aging. These static and dynamic frequency variations
have to be compensated, otherwise the mobile would be in danger of losing connection to the network.
The technique used to perform the frequency compensation is generally termed Automatic Frequency
Control (AFC). To summarize the operation of DCXO, GSM Baseband processor will calculate the
AFC compensation (which is continuously updated) required based on the measured frequency error.
Then the required AFC compensation is sent to the LUXO (Lineari-Zation Unit of Crystal Oscillator),
which in turns control the DCXO core and generates the 26MHz system clock.
3. HW Circuit Description
- 23 -
Figure. 3-3 Locosto DCXO Overview
C107
1000p
J12
NC10
H12
NC11
NC12
NC13
NC14
NC15
NC16
NC17
NC18
NC19
SPARE3
SPARE2
XTAL
G12
L11
K11
J11
H11
L10
K10
J10
U1
U2
D15
L8
R105
1.5M
X101
W-191-866
4
GND2
1
HOT1
26MHz
R104
220K C109
HOT2
GND1
C108
0.5p
C112
4.7p
3
2
10p
DITHERING
Page 23
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3.4 RTC(32.768KHz Crystal)
The integrated Real Time Clock (RTC) is able to provide programmable alarm functions and external
interrupts. Due to its extreme low power consumption the RTC can be supplied from a small backup
battery. This allows the generation of external interrupts, even when the main Locosto supply voltage
is switched off. For this purpose the RTC is powered by own voltage supply pins VDD_RTC and
VSS_RTC.
The RTC shall be driven by a 32.768 kHz (32k) clock which needs to be applied via the Triton(ABB)
OSC32KIN and OSC32KOUT pins. The clock can be fed from either an external clock source or use
the on chip 32 KHz oscillator module.
The low clock frequency and the optimized low power design give the possibility to run the chip with a
minimum of power dissipation. For example, for this specific application the 26 MHz reference
oscillator can be switched off during system standby and a low- power time reference can be kept
when the 32k clock is provided to the RTC.
The RTC consists of an Locosto specific RTC shell, containing the RTC macro, as well as the 32 kHz
oscillator, as described in the following sections. The module RTC Shell solely performs level
translation of the 32KHz clock to the VDD_LD1 power supply domain, and is not functionally
associated with the RTC.
3. HW Circuit Description
- 24 -
Figure. 3-4 Locosto RTC Interface
LED_A
LED_B
LED_C
VIBDR
CKEN
REGEN
HSDET
BM_SEL
R16
T16
P16
C16
E17
F17
U12
H12
G12
F16
M8
B16
CKEN
JACK_DETECT
OSC32KIN
OSC32KOUT
CLK32KOUT
BM_PRECH
CLK32K
MLED1
MLED2
MOTOR_P
V_RTC
C105
10p
R103
220K
C104
X100
15p
MC-146_7pF
4
12
C106
15p
3
32.768KHz
Page 24
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3.5 LCD Interface(8-bit Parallel interface)
3. HW Circuit Description
- 25 -
Signals Description
_LCD_MAIN_CS This signal enable to access to the driver IC of LCD.
LCD_D(0:7) This signal transfer display data to driver IC.
LCD_ADS, _LCD_WR This signal transfer control signal to driver IC.
LCD_RESET This signal makes driver IC to HW default status.
VRWLED This signal provide power to white LEDs.
MLED1/2 This signal be feed back from white LEDs.
V_EXTH, V_IO This signal provides power to LCD modules.
Figure 3-5-1. LCD Interface
V_EXTH
V_IO
CN301
54
1
53
LCD_D(0:7)
LCD_ADS
_LCD_WR
_LCD_MAIN_CS
_LCD_SUB_CS
LCD_D(7)
LCD_D(6)
LCD_D(5)
LCD_D(4)
LCD_D(3)
LCD_D(2)
LCD_D(1)
LCD_D(0)
EVRC14S03Q030100R
EVRC14S03Q030100R
LCD_ID
EAR_P
EAR_N
MOTOR_P
IND_LED_B
IND_LED_R
FL301
EVRC14S03Q030100R
FL303
FL305
R312
100K
4
3
2
1
9
8
7
6
9
8
7
6
R308
47K
SPK_P
SPK_N
INOUT_A4
INOUT_A3
INOUT_A2
INOUT_A1
INOUT_B1
INOUT_B2
INOUT_B3
INOUT_B4
INOUT_B1
INOUT_B2
INOUT_B3
INOUT_B4
G15G2
10
INOUT_B4
INOUT_B3
INOUT_B2
INOUT_B1
INOUT_A1
INOUT_A2
INOUT_A3
INOUT_A4
G110G2
INOUT_A1
INOUT_A2
INOUT_A3
INOUT_A4
G110G2
6
7
8
9
1
2
3
4
5
1
2
3
4
5
LCD_RESET
CAM_RESET
2
3
52
4
51
550
6
49
48
7
8
47
46
9
45
10
44
11
43
12
42
13
41
14
40
15
39
16
38
17
18
37
36
19
20
35
34
21
22
33
23
32
24
31
30
25
26
29
2728
C312
0.1u
VBAT
FL300
ICVE10184E050R101FR
9
8
7
6
9
8
7
6
ICVE10184E050R101FR
9
8
7
6
I2C_SDA
I2C_SCL
MLED1
MLED2
VRWLED
CAM_PWDN
C310
C311
0.1u
0.1u
C313
0.1u
INOUT_B1
INOUT_B2
INOUT_B3
INOUT_B4
INOUT_B1
INOUT_B2
INOUT_B3
INOUT_B4
INOUT_B1
INOUT_B2
INOUT_B3
INOUT_B4
1
INOUT_A1
2
INOUT_A2
3
INOUT_A3
4
INOUT_A4
G15G2
10
FL302
ICVE10184E050R101FR
1
INOUT_A1
2
INOUT_A2
3
INOUT_A3
4
INOUT_A4
G15G2
10
FL304
1
INOUT_A1
2
INOUT_A2
3
INOUT_A3
4
INOUT_A4
G110G2
5
1V8_CAM
CAM_D(7)
CAM_D(6)
CAM_D(5)
CAM_D(4)
CAM_D(3)
CAM_D(2)
CAM_D(1)
CAM_D(0)
2V8_CAM
CAM_MCLK
CAM_PCLK
CAM_HS
CAM_VS
CAM_D(0:7)
VA300
varistor
NA
VA301
VA302
VA303
1000p
C314
1u
0.1u
C316
C315
Page 25
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. HW Circuit Description
- 26 -
3.6 SIM Card Interface
The Locosto provides SIM Interface Module. The Locosto checks status periodically during established
call mode whether SIM card is inserted or not, but it doesn't check during deep sleep mode. In order to
communicate with SIM card, 3 signals SIM_IO, SIM_CLK, SIM_RST
Figure 3-6. SIM CARD Interface
Signals Description
SIM_RST This signal makes SIM card to HW default status.
SIM_CLK This signal is transferred to SIM card.
SIM_IO This signal is bi-directional data line
V_SIM
SIM_PW_CTL
R130
10K
SIM_IO SIM_CLK
C145
22p
D101
DNI_DIODE_1006
4
5
6
10
9
GND1
VPP
IO
GND5
GND4
J100
VCC
RST
CLK
GND2
GND3
1
2
3
7
8
D102
V_SIM
C146
D103
0.1u
DNI_DIODE_1006
DNI_DIODE_1006
SIM_RST
C147
22p
Page 26
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. HW Circuit Description
- 27 -
3.7 KEYPAD Interface
Figure 3-7 KEY MATRIX Interface
V_UP
V_DN
KEYPAD
CN200
12345
SPK
EVLC14S02050VA200
VA201 EVLC14S02050
EVLC14S02050VA203
VA204 EVLC14S02050
END
KB200
VA202
EVLC14S02050
RPWON
R213 150
KBR(0)
KBR(1)
KBR(2)
KBR(3)
KBR(4)
KBC(0)
KBC(1)
KBC(2)
KBC(3)
KBC(4)
R226 680
R230 680
R233 680
R235 680
R237 680
OK
OK
1
KB201
680R228
KB206
4
KB210
7
680R232
KB215
*
680R234
680R236
680R238
2
KB202 KB205
KB207
5
KB211
8
KB216
0
KB203
KB208
KB212
KB217
3
KB204
LEFT
KB209
6
9
#
KB213
KB218
UP
RIGHT
DOWN
SOFT
KB214
CLEAR
SOFT1
MENU
SEND
CLEAR
Page 27
3.8 Battery Charging Block Interface
The ISL9221 is a high performance battery charger designed to charge single cell Li-Ion/Li-Poly
batteries with up to 500mA of current from an external power source. It is a stand-alone charging
solution, with just one external component required for complete functionality.
The ISL9221 precisely regulates battery charge voltage and current for 4.2V Li-Ion/Li-Poly battery
cells. The ISL9221 has four basic modes for the battery charge cycle: preconditioning/trickle charge;
constant current/fast charge; constant voltage; and end of charge.
- 28 -
3. HW Circuit Description
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Figure 3-6. SIM CARD Interface
VCHG_IN
VBAT
VCHG VBUS
VBUS_IN
EOC
CHG_EN
DNI
R305
V_IO
R301
100K
5.6K
R303
U300 ISL9221
1
VDC
VUSB
_PPR
_CHG
_EN
IMIN
VDC_BYP
USB_BYP
2
3
4
5
6
PGND
BAT
IVDC
GND
IUSB
13
12
11
10
9
8
7
R306
33K
DNI
R307
16K
R304
C304
C305
0.1uF0.1uF
C306
0.1uF
Page 28
3.9 RF Interface
Locosto features a fully integrated constant-gain direct conversion receiver, i.e. there is no interstage
filter needed and the baseband level at the analogue IQ- interface follows directly the RF input level.
Depending on the baseband ADC dynamic range, single- or multiple-step gain switching schemes are
possible.
An integrated, selfaligning, low-pass filter ensures the receivers to function under blocking and
reference interference conditions and avoids aliasing by baseband sampling. An automatic DC-offset
compensation is implemented and can beswitched depending on the gain setting.
- 29 -
3. HW Circuit Description
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Figure 3-9-1. FEM interface
V_EXTH
ANT_SW1
ANT_SW2
C431
1000p
C432
1000p
C433
1000p
LMSP43QC-789TEMPFL400
11
19
VC1
20
VC2
21
VDD
9
GND1
10
GND2
12
GND3
13
GND4
14
GND5
16
GND6
18
GND7
22
GND8
NC2
GSM1900_RX1
ANT
GSM1900_RX2
GSM1800_RX1
GSM1800_RX2
GSM900_RX1
GSM900_RX2
GSM850_RX1
GSM850_RX2
GSM1800_1900_TX
NC1
GSM850_900_TX
23
24
1
2
3
4
5
6
7
8
15
17
Page 29
- 30 -
3. HW Circuit Description
The digital transmitter architecture is based on a fractional-N sigma-delta synthesizer for constant
envelope GMSK modulation. This configuration allows a very low power design with a reduced
external component count.
The modulation is transferred between baseband- and RF-part of the PMB7880 via a digital interface
signal into the digital modulator. The following Gaussian filter shapes the digital data stream for the
GMSK modulation. Additionally a pre-distortion filter compensates the attenuation of the PLL transfer
function resulting in a very low distortion at the transmit output. The filtered digital data stream is
scaled appropriately and added to the channel word.
This sum is fed into the MASH modulator. The output of the MASH modulator is a sequence of integer
divider values representing the high resolution fractional input signal. This sequence controls the MMD
(multi modulus divider) at a sample rate of 26MHz. Thus a tightly controlled frequency modulation of
the VCO is achieved.
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Figure 3-9-2. PAM (Power Amplifier Module) interface
close to DBB
0.5p
C415
3.3nH
L400
0.01u
C407
47R404
DNI
C418
ECCH0003002
C405
C2012JF1A106ZT
10u
C419
DNI
1.5p
C402
47R405
R400
15K
GND814GND9
16
21
P_GND
19
RSVD_GND
VAPC
20
17
VBATT
2
VCC1A6VCC1B
BS
1
DCS_PCS_IN
315
DCS_PCS_OUT
4
EGSM_IN
11
EGSM_OUT
ENABLE
18
GND1
5
7
GND28GND3
GND4
9
10
GND5
GND6
12
13
GND7
C400
SKY77318
U400
68p
C412
180p
C410
15p
47p
C413
C421
0.5p
27p
C423
1.5p
C422
0.5p
C403
C417
1p
1.5p
C414
L410
2.7nH
0.01u
C408
0.01u
VBAT
10nH
L404
C406
R403
10
39p
C409
VDDRF1
18nH
L403
1nH
L401
3.3nH
L411
2.2p
C401
TXLB
TXHB
TX_RAMP
PA_BAND
PA_EN
Page 30
- 31 -
3. HW Circuit Description
3.10 Audio Interface
3.10.1 Uplink Path
A voice signal is converted to electrical signal with Microphone. The converted electrical voice signal is
amplified and converted to digital signal in ABB(T3031). The converted digital data is encoded to GSM
voice standard in DBB(LOCOSTO).
The audio signals from main microphone goes to MICP and MICN of ABB and the voice signal from
head-set to HSMIC of ABB. The bias voltage for microphone is 2V for main mic. and 1.8V for head-set
mic, which bias voltage is generated in ABB(MICBIAS, V_IO)
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Figure 3-10-1 Main Mic interface
MICBIAS
MICIP
MICIN
C223
DNI
L200
100nH
R214
1K
C221
C220
0.1u
C222 22n
22nC224
10u
R225
DNI
C225
DNI
C217
39p
VA205
L201
100nH
0R227
MIC200
1
OUT
2
G1
3
G2
4
G3
5
PWR
6
G4
SPM0204LE5-QB
Page 31
- 32 -
3. HW Circuit Description
3.10.2 Downlink Path
The voice downlink path receives speech samples at the rate of 8 kHz/16kHz from the DSP via the
voice serial interface VSP and converts them to analog signals to drive the external transducers.
Earphone : The earphone amplifier provides a full differential signal on the terminals (EAR_P,
EAR_N)
Headset : Each output amplifier provides a single signal on Headset Left.(HSOL)
Handfree : The 8 Ohms speaker amplifier provides a differential signal on the terminals SPKPA, and
SPKNA then goes to external AMP for SPEAKER(SPKPA, SPKNA)
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Figure 3-10-2 Downlink Interface of ABB
MICIN
MICIP
HSMIC
MICBIAS
HSMICBIAS
AUXI_FMR
FML
EARN
EARP
HSOL
HSOR
HSOVMID
AUDVMID
FILTERAPLL
SPKPA_1
SPKPA_2
SPKNA_1
SPKNA_2
SPKPD_1
SPKPD_2
SPKND_1
SPKND_2
SPKVDD_1
SPKVDD_2
SPKGND_2
SPKGND_1
TMS
TDO
TCK
TDI
R118
15K
C121
0.1u
VBAT
MICBIAS
C114
47p
C122
4.7u
C115
47p
F2
G2
D2
G6
H6
C1
C2
L100 100nH
H2
J2
L102 100nH
G1
TP102
F1
J6
E1
P2
K6
L6
M6
M7
K1
K2
M1
M2
L1
L2
N1
H1
R1
U2
U1
T1
K12
MICIN
MICIP
HSMIC
RADIO_R
RADIO_L
100nHL101
SPKPA
SPKNA
R113 0
C116
C117
47p
0R112
EAR_P
EAR_N
HSOL
C119
4.7u47n
C120
4.7u
C118
4.7n
Page 32
- 33 -
3. HW Circuit Description
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Figure 3-10-3 Speaker/Receiver Interface
SPKNA
SPKPA SPK_EN
R202
R208
C215
47p
C204 220n
4.7
C206
47p
4.7
C214
47p
DNIC200
C216
0.1u
VBAT
FB200
C209
2.2u
C207 47p
C210
47p
R205 0
C211
47p
0R209
C212 C213
DNI
SPK_P
SPK_N
DNI
R200 20K
DNIC201
R201 20K
5.1KR203
R210
100K
5.1KR204
220nC205
TPA6205A1ZQVRU200
C3 A3
IN-
VDD
IN+
_SHUTDOWN
BYPASSC1GND
VO+
C208
C2
1u
B3
A1B1
VO-
B2
FML
EARN
EARP
L100 100nH
H2
J2
100nHL101
R113 0
0R112
EAR_P
EAR_N
Page 33
- 34 -
3. HW Circuit Description
3.11 Key LED Interface
This handset has 10 LEDs that illuminates blue color.
Control signal is controlled by Locosto with PWM and handset has 3 methods, ON, OFF and dimming.
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Figure 3-11 Key LED interface
VBAT
C218
1u
KEY_BACKLIGHT
R215
100ohm
LEWW-S14
LD200
R217
R216 R224
100ohm
100ohm
LEWW-S14
LD201
R229 10K
R218
100ohm
LEWW-S14
LEWW-S14
LD202
LD203
R231
100K
2
R219
LEWW-S14LD204
3
1
R220
100ohm 100ohm
LD205 LEWW-S14
Q200
2SC5585
R221
LEWW-S14LD206
R222
100ohm
LEWW-S14LD207
R223
100ohm
LEWW-S14LD208
100ohm100ohm
C219
1u
LEWW-S14LD209
Page 34
- 35 -
3. HW Circuit Description
3.12 Vibrator Interface
This handset has vibrator operation. Control signal is controlled by Locosto with PWM.
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Figure 3-12 Vibrator interface
LED_B
LED_C
VIBDR
CKEN
REGEN
E17
F17
U12
H12
G12
F16
MLED2
MOTOR_P
CKEN
Page 35
- 36 -
3. HW Circuit Description
3.13 Memory Interface
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Figure 3-13 Memory interface
nBLE
nBHE
nCS0
R211
100K
R212
100K
nRDYMEM
R207 51
CKM
RnW
nMOE
nFADV
FDP
nCS3
R206
10K
V_MEM
TP200
TP201
TP202
TP203
TP204
U201
C4
DNU1
C11
DNU2
E7
DNU3
H4
DNU4
H11
DNU5
C7
R_LB_
C8
R_UB_
H7
R_CE_
H8
R_CRE
D3
F_RDY_R_WAIT
D6
CLK
D8
WE_
F12
OE_
E6
AVD_
E8
F_RST_
E9
F_WP_
E11
F_CE_
D9
F_ACC
A1
NC1
A14
NC2
C3
NC3
C12
NC4
H3
NC5
H12
NC6
K1
NC7
K14
NC8
S71NS128PC0
VCCQ1
VCCQ2
VSSQ1
VSSQ2
A_DQ0
A_DQ1
A_DQ2
A_DQ3
A_DQ4
A_DQ5
A_DQ6
A_DQ7
A_DQ8
A_DQ9
A_DQ10
A_DQ11
A_DQ12
A_DQ13
A_DQ14
A_DQ15
VCC
VSS1
VSS2
A16
A17
A18
A19
A20
A21
A22
D7
E3
G10
D5
F3
G5
E12
G12
G11
F9
F8
G7
G6
F5
F4
F11
F10
G9
G8
F7
F6
G4
G3
E4
D11
E10
D10
E5
D4
D12
V_MEM
C202
0.1u
DATA_ADD(0)
DATA_ADD(1)
DATA_ADD(2)
DATA_ADD(3)
DATA_ADD(4)
DATA_ADD(5)
DATA_ADD(6)
DATA_ADD(7)
DATA_ADD(8)
DATA_ADD(9)
DATA_ADD(10)
DATA_ADD(11)
DATA_ADD(12)
DATA_ADD(13)
DATA_ADD(14)
DATA_ADD(15)
ADD(16)
ADD(17)
ADD(18)
ADD(19)
ADD(20)
ADD(21)
ADD(22)
C203
0.1u
Page 36
- 37 -
3. HW Circuit Description
3.14 Power Block Interface
There are 10 LDOs(Low Drop Output) regulators and 1 DC-DC converter in ABB chip.
The output of these 10 LDOs and 1 DC-DC converter is as following table.
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Table LDO Output Table
Output Voltage Usage
VREXTL 1.8V/2.8V, 1.3V/1.03V Digital Core of DBB
VREXTH 1.8V/2.8V Peripheral Devices
VRMEM 1.8V External Memory
VRMMC 1.8V/2.85V RF
VRABB 2.8V Analog Block of ABB
VRSIM 1.8V/2.85V SIM Card Drive
VRUSB 3.3V USB Block
VRPLL 1.4V/1.3V/1.05V PLL Block
VRIO 1.8V I/O Interface
VRWLED 20V White LED Drive
Page 37
- 38 -
3. HW Circuit Description
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
ABB Power Supply Scheme
Page 38
- 39 -
3. HW Circuit Description
3.15 FM RADIO INTERFACE
The Si4702(Si4703) integrates the complete tuner function from antenna input to stereo audio output
for FM broadcast radio reception.
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Functional block diagram
Functional block diagram
Page 39
- 40 -
3. HW Circuit Description
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Pin No. Name Description
1,20 NC No Connect. Leave floating.
2 FMIP FM RF inputs.
3 RFGND RF ground. Connect to ground plane on PCB.
4,12,15,PAD GND Ground. Connect to ground plane on PCB.
5 _RST Device reset(active low) input.
6 _SEN Serial enable input(active low).
7 SCLK Serial clock input.
8 SDIO Serial data input/output.
9 RCLK External reference oscillator input.
10 VIO I/O supply voltage.
11 VD Digital supply voltage. May be connected directly to battery.
13 ROUT Right audio output.
14 LOUT Left audio output.
16 VA Analog supply voltage. May be connected directly to battery.
17,18,19 GPIO3,2,1 General purpose input/output.
Page 40
- 41 -
3. HW Circuit Description
3.16 Camera INTERFACE
Parallel Camera Interface in generic configuration is same below.
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 41
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 42 -
4. TROUBLE SHOOTING
4. TROUBLE SHOOTING
4.1 Trouble Test Set-up
Power on all of test equipment
- Connect PIF-UNION JIG or dummy battery to the DUT for power up.
- Connect mobile switch cable between Communication test set and DUT when you need to make a
phone call.
- Follow trouble shooting procedure
4.000V 0.0000A
Page 42
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 43 -
4.2 RF Part Component
< PCB Placement>
<ASM interface>
<SAW Filter interface>
< PCB Placement>
REFERENCE PART Description
U102 DBB(Included RF Block)
U400 PAM (Power Amp. Module)
X101 DCXO (26MHz)
FL400 FEM (Front Ended Module)
SW400 Mobile Switch
U102
X101
V_EXTH
ANT_SW1
ANT_SW2
SW400
C431
C432
1000p
1000p
FL400
U400
LMSP43QC-789TEMPFL400
11
GSM1900_RX1
ANT
GSM1900_RX2
GSM1800_RX1
GSM1800_RX2
GSM900_RX1
GSM900_RX2
GSM850_RX1
GSM850_RX2
GSM1800_1900_TX
NC123NC2
GSM850_900_TX
24
C433
1000p
19
VC1
20
VC2
21
VDD
9
GND1
10
GND2
12
GND3
13
GND4
14
GND5
16
GND6
18
GND7
22
GND8
C426
3.5p
1
2
3
4
5
6
7
8
15
17
19
20
21
9
10
12
13
14
16
18
22
LMSP43QC-789TEMPFL400
11
1
GSM1900_RX1
2
ANT
VC1
GSM1900_RX2
VC2
VDD
GND1
GND2
GND3
GND4
GND5
GND6
GND7
NC123NC2
GND8
24
GSM1800_RX1
GSM1800_RX2
GSM900_RX1
GSM900_RX2
GSM850_RX1
GSM850_RX2
GSM1800_1900_TX
GSM850_900_TX
3
4
5
6
7
8
15
17
C427
3.5p
C428
2.7p
C429
2.7p
C430
3.5p
C434
3.5p
C435
4p
C436
4p
PCS_RXN
PCS_RXP
DCS_RXN
L407 L406
5.1nH 3.9nH
DCS_RXP
EGSM_RXP
L408
15nH
EGSM_RXN
GSM_RXP
15nH
L409
GSM_RXN
Page 43
- 44 -
4. TROUBLE SHOOTING
4.2.1 DCXO Part
Produce RF and BB reference Clock - 26MHz Clock.
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
X101
Checking Points
C107
R105
< DCXO Placement>
WaveformPin 1
Frequen
<DCXO Waveform>
< DCXO Circuit>
NC10
NC11
NC12
NC13
NC14
NC15
NC16
NC17
NC18
NC19
SPARE3
SPARE2
XTAL
J12
H12
G12
L11
K11
J11
H11
L10
K10
J10
U1
U2
D15
L8
X101
W-191-866
4
GND2
HOT2
1
GND1
HOT1
C107
26MHz
1000p
R104
220K C109
R105
1.5M
C108
0.5p
C112
4.7p
3
2
DITHERING
10p
Page 44
- 45 -
4. TROUBLE SHOOTING
4.2.2 Front End Module & Mobile Switch
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
< M/S & FEM Placement>
TX
RX
RX TX
< LOW BAND> < HIGH BAND>
U400 FL400
SW400
X101
U102
TP 1
TP 2
< M/S & FEM Circuit>
Mode 850/900 TX 850/900 RX 1800/1900 TX 1800/1900 RX
ANT_SW1 H L L H
ANT_SW2 H L H L
< FEM LOGIC TABLE>
TP 2
TP 1
V_EXTH
SW400
GRS300-2S-H36-E3000
ANT
G1
G2
RF
C425
100p
L405
ANT_SW1
ANT_SW2
C431
1000p
1000p
C433
C432
1000p
19
VC1
20
VC2
21
VDD
9
GND1
10
GND2
12
GND3
13
GND4
14
GND5
16
GND6
18
GND7
22
GND8
11
GSM1900_RX1
ANT
GSM1900_RX2
GSM1800_RX1
GSM1800_RX2
GSM1800_1900_TX
NC123NC2
GSM850_900_TX
24
LMSP43QC-789TEMPFL400
GSM900_RX1
GSM900_RX2
GSM850_RX1
GSM850_RX2
47nH
C424
DNI
1
2
3
4
5
6
7
8
15
17
Page 45
- 46 -
4. TROUBLE SHOOTING
4.3 RX Receiver Part
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
START
Check p oint.
DCXO(
X101)
Setup Test Equipment
Cell Power : -74dBm
GSM850 CH190
PCS CH661
EGSM CH37
DCS CH698
Check p oint
mobile SW &
FEM
(SW400 ,FL400)
Re-Dow nload S/W &
CA
L
U400FL400
X101
U102
CHECKING FLOW
Page 46
- 47 -
4. TROUBLE SHOOTING
4.3.1 DCXO Part
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Is the w avefo rm
of Pin1 sim ila r to
DCXO(X101)
Wavefo rm ?
Replace X101
Yes
No
DCXO Cir cuit i s OK.
See next page to check
PLL Circ ui t.
WaveformPin 1
Frequency
X101
Checking Points
C107
R105
CHECKING FLOW
< DCXO Placement>
<DCXO Waveform>< DCXO Circuit>
NC10
NC11
NC12
NC13
NC14
NC15
NC16
NC17
NC18
NC19
SPARE3
SPARE2
XTAL
J12
H12
G12
L11
K11
J11
H11
L10
K10
J10
U1
U2
D15
L8
X101
W-191-866
4
GND2
HOT2
1
GND1
HOT1
C107
1000p
26MHz
R104
220K C109
R105
1.5M
C108
0.5p
C112
4.7p
3
2
DITHERING
10p
Page 47
- 48 -
4. TROUBLE SHOOTING
4.3.1 DCXO Part
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
CHECKING FLOW
< Mobile S/W & FEM Placement>
< SW400 Signal>
Check S W400
with spectru m
U102
Signals is
OK?
Yes
Check F L400?
Mobile SW & FEM is OK.
See next p age
GSM850 Signal Spectrum
No
No
Repl ace
Mobile SW
(S
W400)
Repl ace
FEM(FL
400)
X101
U400FL400
SW400
Page 48
- 49 -
4. TROUBLE SHOOTING
4.4 TX Transmitter Part
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Check poi nt
DCXO(X101)
Re-Dow nload S/W & RF
CAL
Check p oin t
Loc os to(U102)
Output Signa
l
Check p oin t
PAM(U400)
Control Signa l
Check
Mobile S/W &
FEM
(FL400,SW400
)
Setup T est Equipment
Cell Power : -74dBm
GSM850 CH190
PCS CH661
EGSM CH37
DCS CH698
U400FL400
SW400
X101
U102
CHECKING FLOW
Page 49
- 50 -
4. TROUBLE SHOOTING
4.4.1 DCXO Part
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Is the w avefo rm
of Pin1 sim ila r to
DCXO(X101)
Wavefo rm ?
Replace X101
Yes
No
DCXO Cir cuit i s OK.
See next page to check
PLL Circ ui t.
WaveformPin 1
Frequency
X101
Checking Points
C107
R105
CHECKING FLOW
< DCXO Placement>
<DCXO Waveform>< DCXO Circuit>
J12
NC10
H12
NC11
G12
NC12
NC13
NC14
NC15
NC16
NC17
NC18
NC19
SPARE3
SPARE2
XTAL
L11
K11
J11
H11
L10
K10
J10
U1
U2
D15
L8
X101
W-191-866
4
GND2
HOT2
1
GND1
HOT1
C107
26MHz
1000p
R104
220K C109
R105
1.5M
C108
0.5p
C112
4.7p
3
2
DITHERING
10p
Page 50
- 51 -
4. TROUBLE SHOOTING
4.4.2 PAM INPUT Part(Locosto Output)
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Check Co ntro l
Signa ls
Signals are
Normal ?
Check
Loc os to(U102)
Yes
No
PAM Control
Signal is OK.
See next p age to
check
ASM & Mobile SW
Circuit.
U400FL400
SW400
X101
U102
CHECKING FLOW
< PAM INPUT Placement>
< PAM INPUT Circuit>
close to DBB
0.5p
C415
3.3nH
L400
0.01u
C407
47R404
DNI
C418
ECCH0003002
C405
C2012JF1A106ZT
10u
C419
DNI
1.5p
C402
47R405
R400
15K
GND814GND9
16
21
P_GND
19
RSVD_GND
VAPC
20
17
VBATT
2
VCC1A6VCC1B
BS
1
DCS_PCS_IN
315
DCS_PCS_OUT
4
EGSM_IN
11
EGSM_OUT
ENABLE
18
GND1
5
7
GND28GND3
GND4
9
10
GND5
GND6
12
13
GND7
C400
SKY77318
U400
68p
C412
180p
C410
15p
47p
C413
C421
0.5p
27p
C423
1.5p
C422
0.5p
C403
C417
1p
1.5p
C414
L410
2.7nH
0.01u
C408
0.01u
VBAT
10nH
L404
C406
R403
10
39p
C409
VDDRF1
18nH
L403
1nH
L401
3.3nH
L411
2.2p
C401
TXLB
TXHB
TX_RAMP
PA_BAND
PA_EN
High Band
Type 5dB
(3 ~ 7dB)
Low Band
Type 5dB
(3 ~ 7dB)
➁
➀
Page 51
4.4.3 PAM Control Signal part
Check Co ntro l
Signa ls
Signals are
Normal ?
Check
Loc os to(U102
)
Yes
No
PAM Control
Signal is OK.
See next p age to
check
ASM & Mobile SW
Circuit.
PA Enable
U400FL400
SW400
X101
U102
Tx Ramp
CHECKING FLOW
- 52 -
4. TROUBLE SHOOTING
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
< PAM Control Placement>
< PAM Control Circuit> < PAM Control Wave >
close to DBB
0.5p
C415
3.3nH
L400
0.01u
C407
47R404
DNI
C418
ECCH0003002
C405
C2012JF1A106ZT
10u
C419
DNI
1.5p
C402
47R405
R400
15K
GND814GND9
16
21
P_GND
19
RSVD_GND
VAPC
20
17
VBATT
2
VCC1A6VCC1B
BS
1
DCS_PCS_IN
315
DCS_PCS_OUT
4
EGSM_IN
11
EGSM_OUT
ENABLE
18
GND1
5
7
GND28GND3
GND4
9
10
GND5
GND6
12
13
GND7
C400
SKY77318
U400
68p
C412
180p
C410
15p
47p
C413
C421
0.5p
27p
C423
1.5p
C422
0.5p
C403
C417
1p
1.5p
C414
L410
2.7nH
0.01u
C408
0.01u
VBAT
10nH
L404
C406
R403
10
39p
C409
VDDRF1
18nH
L403
1nH
L401
3.3nH
L411
2.2p
C401
TXLB
TXHB
TX_RAMP
PA_BAND
PA_EN
Tx Ramp
➁
➀
Page 52
- 53 -
4. TROUBLE SHOOTING
4.4.4 Front End Module Part
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
< M/S & FEM Placement>
TX
RX
RX TX
< LOW BAND> < HIGH BAND>
U400 FL400
SW400
X101
U102
TP 1
TP 2
< M/S & FEM Circuit>
Mode 850/900 TX 850/900 RX 1800/1900 TX 1800/1900 RX
ANT_SW1 H L L H
ANT_SW2 H L H L
< FEM LOGIC TABLE>
TP 2
TP 1
V_EXTH
SW400
GRS300-2S-H36-E3000
ANT
G1
G2
RF
C424
DNI
C425
100p
L405
ANT_SW1
ANT_SW2
C431
1000p
1000p
C432
C433
1000p
19
VC1
20
VC2
21
VDD
9
GND1
10
GND2
12
GND3
13
GND4
14
GND5
16
GND6
18
GND7
22
GND8
11
ANT
GSM1800_1900_TX
NC123NC2
GSM850_900_TX
24
LMSP43QC-789TEMPFL400
GSM1900_RX1
GSM1900_RX2
GSM1800_RX1
GSM1800_RX2
GSM900_RX1
GSM900_RX2
GSM850_RX1
GSM850_RX2
47nH
1
2
3
4
5
6
7
8
15
17
Page 53
- 54 -
4. TROUBLE SHOOTING
4.5 Power On Trouble
Check Points
-Battery Voltage( Need to over 3.35V)
-Power-On Key detection (PWRON signal)
-Outputs of LDOs from ABB(Triton-Lite)
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
V_ABB
V_SIM
V_EXTL
V_EXTH
V_SIM
V_USB
V_RTC
V_IO
V_MEM
U300
X100
R213
TP1
TEST POINT
CIRCUIT
TP 1
WAVE FROM
RPWON
V_EXTL
C154
0.1u
V_EXTH
C155
1u
R213 150
V_SIM
V_MMC
C156
1u
C157
470n
V_RTC
V_USB
C158
1u
END
VA202
EVLC14S02050
V_ABB
V_IO
C159
C160
1u
KB200
C161
1u
V_MEM
C162
1u
V_PLL
C163
2.2u1u
VREXTL
G17
VREXTH
L17
T10
VRMMC
A3
VRSIM
B8
VRUSB
N17
VRRTC
J16
VRIO
B2
VRABB
U11
T12
VRPLL
NC2
NC3
NC4B1NC5
NC6
NC7
NC1
A1
B14
A15
L103
2.2uH
NC8
A2
T17
A16
A17
U16
U17
VBAT
R126
3.3
C136
1u
D100
SDB0530
C143
2.2u
VRWLED
VRWLED_1
VRWLED_2
VRMEM
Page 54
- 55 -
4. TROUBLE SHOOTING
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
CHECKING FLOW
START
Check Batt ery Voltage
> 3.35V
YES
Push power-on key
And check the level change
of PWON
YES
Check t he volt ag e of
The LDO outputs at U101
YES
Replace the main board
NO
NO
NO
Charge or Cha nge Battery
Check the co ntact of pow er key
Or dome-sw
Repl ace U101
itch
V_EXTL=1.8V, V_EXTH=2.8V, V_MMC=2.8V
V_SIM= 1.8 or 3V, V_USB=3.3V, V_RTC=1.8V
V_IO=1.8V, V_ABB =2.8V, V_MEM=1.8V ,
V_PLL= 1.3V
Page 55
- 56 -
4. TROUBLE SHOOTING
4.6 Charging Trouble
Check Points
-Connection of TA (check TA voltage 5.6V)
-Charging Current Path component voltage drop
-Battery voltage
-Charging IC
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
CHARGING
OFF
CHARGING
ON
TP1
R305
U300
TEST POINT
WAVE FROM
CIRCUIT
TP 1
Charging while
CHG_EN is low
EOC
CHG_EN
V_IO
100K
R301
DNI
R305
VBUS_IN
VCHG_IN
5.6K
R303
U300 ISL9221
1
VDC
VUSB
_PPR
_CHG
_EN
IMIN
VDC_BYP
USB_BYP
2
3
4
5
6
PGND
BAT
IVDC
GND
IUSB
VCHG VBUS
VBAT
13
12
11
10
9
8
7
R306
33K
R307
DNI
16K
R304
C304
C305
0.1uF0.1uF
C306
0.1uF
Page 56
- 57 -
4. TROUBLE SHOOTING
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
CHECKING FLOW
START
I/O Con nec to r(CN302)
Is w ell-so lder ed
Is the volt age o f VCHG 5.6V
?
YES
YES
Check the 4th -pi n
of U101 High or Low
YES
Battery is charg ed?
YES
Charging is
properly operat in
g
NO
?
NO
NO
?
NO
Reso ld er the CN302
Pin 12,13 : VCHG
The TA i s out of ord er
Change t he TA
Check t he U101
The battery ma y hav e
probl ems .
Change t he battery .
Page 57
- 58 -
4. TROUBLE SHOOTING
4.7 RTC Trouble
Check Points
-Crystal soldering.
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
X100
TP1
C104
TEST POINT
WAVE FROM
CIRCUIT
RTC will work p rop erly
Is the frequ ency
about 32Khz
START
Replace X100 and tr y again.
YE
S
YE
S
CHECKING FLOW
TP 1
OSC32KOUT
OSC32KIN
CLK32KOUT
LED_A
LED_B
LED_C
VIBDR
CKEN
REGEN
HSDET
BM_SEL
BM_PRECH
R16
T16
P16
C16
E17
F17
U12
H12
G12
F16
M8
B16
CKEN
JACK_DETECT
CLK32K
MLED1
MLED2
MOTOR_P
V_RTC
C105
10p
C104
15p
MC-146_7pF
4
R103
12
220K
C106
15p
X100
3
32.768KHz
Page 58
- 59 -
4. TROUBLE SHOOTING
4.8 LCD Trouble
-LCD assembly status ( FPCB)
-LCD Interface’s status
-Connector combination
-Data signal through EMI filter
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
TEST POINT
CIRCUIT
CN301
LCD_D(0:7)
LCD_ADS
_LCD_WR
_LCD_MAIN_CS
_LCD_SUB_CS
IND_LED_B
IND_LED_R
EVRC14S03Q030100R
LCD_D(7)
LCD_D(6)
LCD_D(5)
LCD_D(4)
LCD_D(3)
LCD_D(2)
LCD_D(1)
LCD_D(0)
EVRC14S03Q030100R
EVRC14S03Q030100R
LCD_ID
R312
100K
EAR_P
EAR_N
MOTOR_P
FL305
FL303
FL301
4
3
2
1
9
8
7
6
9
8
7
6
R308
47K
SPK_P
SPK_N
INOUT_A4
INOUT_A3
INOUT_A2
INOUT_A1
INOUT_B1
INOUT_B2
INOUT_B3
INOUT_B4
INOUT_B1
INOUT_B2
INOUT_B3
INOUT_B4
G15G2
10
INOUT_B4
INOUT_B3
INOUT_B2
INOUT_B1
INOUT_A1
INOUT_A2
INOUT_A3
INOUT_A4
G110G2
INOUT_A1
INOUT_A2
INOUT_A3
INOUT_A4
G110G2
CN101
CN301
54
1
53
2
3
52
4
6
7
8
9
1
2
3
4
5
1
2
3
4
5
LCD_RESET
CAM_RESET
51
550
6
49
48
7
8
47
46
9
45
10
44
11
43
12
42
13
41
14
40
15
39
16
38
17
18
37
36
19
20
35
34
21
22
33
23
32
24
31
30
25
26
29
2728
CN301
V_EXTH
V_IO
C312
0.1u
VBAT
FL300
ICVE10184E050R101FR
INOUT_B1
INOUT_B2
INOUT_B3
INOUT_B4
INOUT_B1
INOUT_B2
INOUT_B3
INOUT_B4
INOUT_B1
INOUT_B2
INOUT_B3
INOUT_B4
1
INOUT_A1
2
INOUT_A2
3
INOUT_A3
4
INOUT_A4
G15G2
10
FL302
ICVE10184E050R101FR
1
INOUT_A1
2
INOUT_A2
3
INOUT_A3
4
INOUT_A4
G15G2
10
FL304
1
INOUT_A1
2
INOUT_A2
3
INOUT_A3
4
INOUT_A4
G110G2
5
1V8_CAM
CAM_D(7)
CAM_D(6)
CAM_D(5)
CAM_D(4)
CAM_D(3)
CAM_D(2)
CAM_D(1)
CAM_D(0)
2V8_CAM
9
8
7
6
9
8
7
6
ICVE10184E050R101FR
9
8
7
6
I2C_SDA
I2C_SCL
MLED1
MLED2
VRWLED
CAM_PWDN
C310
C311
0.1u
0.1u
C313
0.1u
CAM_MCLK
CAM_PCLK
CAM_HS
CAM_VS
CAM_D(0:7)
VA300
varistor
NA
VA301
VA302
VA303
1000p
C314
1u
0.1u
C316
C315
Page 59
- 60 -
4. TROUBLE SHOOTING
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
CHECKING FLOW
START
Is th e connec ti on of
FPCB w ith connecto r o n
PCB(CN301) o k
YE
S
Check t he solderi ng o f
CN301
YES
Check t he
V_IO vol tage is 1.8V ?
S
YE
Check t he signals of
LCD Inter face fro m U102
YES
Does LCD w o rk
properly ?
?
?
NO
NO
NO
NO
NO
Reassem ble FPCB with CN100connec tor
Re-solde ri ng CN301
Check t he U101
Check t he U102
Repl ace LCD m odule
YE
S
LCD wo rking well !
Page 60
- 61 -
4. TROUBLE SHOOTING
4.9 Speaker & Receiver Trouble
Check Points
-Speaker/Receiver Solder contact
-Audio amp soldering
TP1(R202), TP2 (R208) :SPK path
-> Audio signal Check
TP3 (R112), TP4 (R113) : RCV path
-> Audio signal Check
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
TP4
TP3
TP2
TP1
TEST POINT
CIRCUIT
Figure 3-10-3 Speaker/Receiver Interface
TP 1
TP 2
TP 3
TP 4
R202
R208
4.7
C206
47p
4.7
C214
47p
FML
EARN
EARP
C204 220n
C215
47p
L100 100nH
H2
J2
SPKNA
SPKPA SPK_EN
DNIC200
C216
0.1u
VBAT
FB200
C207 47p
C209
2.2u
C210
47p
R205 0
C211
47p
0R209
C212 C213
DNI
SPK_P
SPK_N
DNI
R200 20K
DNIC201
R201 20K
TPA6205A1ZQVRU200
C3 A3
IN-
VDD
IN+
_SHUTDOWN
BYPASSC1GND
VO+
C208
C2
1u
B3
A1B1
VO-
B2
R210
100K
5.1KR203
5.1KR204
220nC205
0R112
100nHL101
R113 0
EAR_P
EAR_N
Page 61
- 62 -
4. TROUBLE SHOOTING
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
CHECKING FLOW (Speaker)
Start
Check t he volt ag e lev el
of U101 = Vbat?
Yes
Check t he Sig nal,
R202,R208
Yes
Check t he Level o f
R210 = HIGH?
Yes
Check t he Sold er
Of Speak er
No
The batter
No
No
SPK_EN sig nal
Re-Asse m ble
No
or Re-place
Check
Check
1
U10
Check
& R21
Speaker
y
0
Yes
Try again
or Change the Bo
ard
Page 62
- 63 -
4. TROUBLE SHOOTING
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
CHECKING FLOW (Receiver)
Start
Check t he volt ag e lev el
of U101 = Vbat?
Yes
Check t he Sig nal,
L100,L101
Yes
Check t he Sig nal,
R112,R113
Yes
Check t he Sold er
Of Receiv er
No
No
No
No
Check
The batte r
Check
U10
Check
R112,R113
Solder
Re-Asse m ble or
Re-place Receiv e
y
1
r
Yes
Try again
or Ch ange the Bo
ard
Page 63
- 64 -
4. TROUBLE SHOOTING
4.10 Headphone Trouble
Check Points
-18pin IO connector
-Passive Parts soldering Status
TP1 (C321), TP2 (FB300) : Audio path
-> Audio signal Check
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
TEST POINT
CIRCUIT
TP 1
TP 2
HSMIC
HOOK_DETECT
HSOL
USB_DP
USB_DM
JACK_DETECT
RPWON
UART_DSR
UART_TX
UART_RX
VA304
V_IO
R316
C318
1u
VA306
150
C329
2200p
1.2KR317
C317
120p
100nH
L300
0.1uC319
C320
2200p
22uC321
FB306
47R324
R325 47
VA305 10u
R329
4.7K
C326
VBAT
V_IO V_IO
R319
2.2K
VA307
VA308
FSA4157L6X
6
B1
5
GND
4
B0
R318
R320
2.2K
(10V,Z,Y5V)
U302
VCC
VA309
0
S
A
(2012)
1
2
3
V_IO
FB300
VBUS_IN
C330
4.7u
(50V,J,NP0)
C333
10u
POP_NOISE
VCHG_IN
BLM15AB601SN1
C331
56p
FB301
FB399
FB302
FB304
FB305
FB307
TP2
22R322
22R323
TP1
CN302
GU041-18P-E1000
21
19
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
20
22
C332
24p
L301
270nH
L302
100nH
FM_ANT
Page 64
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 65 -
CHECKING FLOW
START
Does the audio
profile of the phone
chang e to the
earphone mo de?
Yes
Mic
Go to MIC
Troub le secti on
Check t he signal Lev el
at HSMIC.
Is it abo ut 1. 2~1.5V?
Yes
Change an other Ear-Mic s et an d Try agai n
No
Check t he vol tage Lev el
No
CN302 pin8 = Lo w ?
Re-solder causal
co mp on ent
(CN302)
No
Yes
Earphone
Ac o ust ic
Does w aveform at
U101.HSOL
fluctuate?
Re-solder CN302 or Chan ge
anoth er Ear- Mi c s et and Try again
Replace U101 or Change Board
No
Replace U101 or
Change t he board
Yes
No
Does w aveform at
CN302 pin4,5 fluctuate?
Change an oth er Ear-Mic s et an d Try agai n
Re-solde r ca usal
component
(CN302,C321 etc.)
Page 65
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4.11 Microphone Trouble
Check Points
-18pin IO connector
-Passive Parts soldering Status
TP1 (R214), TP2 (C222) : Mic path
-> Audio signal Check
4. TROUBLE SHOOTING
- 66 -
TEST POINT
CIRCUIT
TP 2
TP 1
MICIP
MICIN
C223
DNI
L200
100nH
TP1 TP2
MICBIAS
C217
39p
0R227
VA205
L201
100nH
SPM0204LE5-QB
MIC200
1
OUT
2
G1
3
G2
4
G3
5
PWR
6
G4
R214
1K
C221
C220
0.1u
C222 22n
22nC224
10u
R225
DNI
C225
DNI
Page 66
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 67 -
CHECKING FLOW
START
Voltage MICBIAS of U1 01
= 2.0V?
Yes
Check t he Sold er
condition of R214 and
C222,C224
Yes
Check the sig nal lev el
at MICP.
Is it about 1. 2~1.5V?
Yes
Microphone w ill work
properly.
No
Replace U101 or Chan ge the b oard
No
Re-solder or replace the Component
No
Re-solder or replace the mi crophone
Page 67
- 68 -
4. TROUBLE SHOOTING
4.12 SIM Card Trouble
Check Points
-Socket soldering
-Proper SIM is used
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
TP1
TP2
TP3
TP6TP5TP4
VCC
RST
CLK
GND
VPP
IO
SIM_CLK SIM_IO SIM_VCC
TEST POINT
CIRCUIT
TP 1
TP 2
TP 3
TP 4
TP 5 TP 6
V_SIM
SIM_PW_CTL
D101
10
4
5
6
9
GND1
VPP
IO
GND5
GND4
R130
10K
SIM_IO SIM_CLK
C145
22p
J100
VCC
RST
CLK
GND2
GND3
1
2
3
7
8
D102
V_SIM
D103
DNI_DIODE_1006
DNI_DIODE_1006
DNI_DIODE_1006
SIM_RST
C146
C147
0.1u
22p
Page 68
- 69 -
4. TROUBLE SHOOTING
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
CHECKING FLOW
START
Volt ag e at p in1 of
J100 is 1.8V or 3V
S
YE
Change th e SIM Card
An d try ag ai n .
Does i t w ork
Proper ly?
S
YE
Change SIM Card
?
NO
NO
Re-solder J100
Re-download SW.
Does i t w ork
Properly
?
YES
SIM Card will b e detecte d.
NO
Change t he main board
Page 69
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 70 -
4.13 KEY backlight Trouble
Check Points
-Control IC is working properly
-Passive Parts soldering Status
TP1
R229
R231
Q200
KEY_BACKLIGHT
OFF
KEY_BACKLIGHT
ON
TEST POINT
WAVE FROM
CIRCUIT
TP 1
C218
1u
KEY_BACKLIGHT
100ohm
VBAT
R215
100ohm
LEWW-S14
LD200
R229 10K
R217
R216 R224
100ohm
LEWW-S14
LD201
R218
100ohm
LEWW-S14
LEWW-S14
LD202
LD203
R231
100K
2
R219
LEWW-S14LD204
3
1
R220
R221
100ohm 100ohm
LEWW-S14LD206
LD205 LEWW-S14
Q200
2SC5585
R222
100ohm
LEWW-S14LD207
R223
100ohm
LEWW-S14LD208
100ohm100ohm
C219
1u
LEWW-S14LD209
Page 70
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 71 -
CHECKING FLOW
START
Is waveform a t R231
HI
GH?
YES
Ar e all L EDs
Workin
g?
YES
Bac kl ight w ill w ork prop erly .
NO
Check U 102(Main board)
NO
Check t he soldering
each R and LE
NO
Repl ace or re-sold ering
co mp on ent
D,Q200
R215~R224
LD200~LD209
Page 71
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 72 -
4.14 Vibrator Trouble
Check Points
-Vibrator contact is right
-MOTOR_P signal working correctly
TEST POINT
WAVE FROM
CIRCUIT
TP 1
CN301
TP1
CN301
U304
C316
R16
OSC32KIN
LED_A
LED_B
LED_C
VIBDR
CKEN
REGEN
HSDET
BM_SEL
BM_PRECH
VBG
IREF
REFGND
VBACKUP
VAC
PCHGAC
T16
P16
C16
E17
F17
U12
H12
G12
F16
M8
B16
M16
L12
M17
R17
B11
A12
C111
R107 10
OSC32KOUT
CLK32KOUT
0.1u
120KR106
CKEN
JACK_DETECT
CLK32K
MLED1
MLED2
MOTOR_P
VCHG
EAR_P
EAR_N
MOTOR_P
IND_LED_B
IND_LED_R
VA300
varistor
NA
VA301
33
32
31
30
29
28
VA302
VA303
C314
1000p
C315
0.1u
C316
1u
Page 72
- 73 -
4. TROUBLE SHOOTING
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
CHECKING FLOW
SETTING : Enter th e engi neering mod e, and s et vibr ator on at v ibration of BB test menu
START
Is the volt age o f
MOTOR_P 2.7V
YES
Check t he contac t
of CN301 ?
Check t he connecti on
Of FPCB ?
Replace vibrator
Vibrator
Wor king well !
?
YES
YES
YES
NO
NO
NO
Replace U101
Replace CN301
Replace FPCB
Page 73
- 74 -
4. TROUBLE SHOOTING
4.15 FM RADIO Trouble
Check Points
-FM RADIO IC soldering
- 32khz signal working correctly
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
U304
U306
C343
C341
TP1
C328
C325
C327
TEST POINT
WAVE FROM
CIRCUIT
TP 1
FM_ANT
C327 100p
FM_INT
19
18
17
20
21
NC2
PGND
GPIO1
1
NC1
2
FMIP
3
RFGND
4
GND1 GND2
5
_RST
_FM_RESET
GPIO2
U304
SI4702-C19-GM
SCLK7SDIO
_SEN
6
8
9
I2C_SCL
I2C_SDA
R321 47K
16
VA
GPIO3
GND3
LOUT
ROUT
VD
VIO
RCLK
10
C343
27p
15
14
13
12
11
V_IO
R327
100ohm
R328
100ohm
V_IO
C338
0.1u
C341 0.1u
C334
1u
V_ABB
VCC
GND
V_ABB
5
C335
1u
22n
2
C336
U306
TC7SH04FS
14
R331 47K
C328 0.1u
C337
22n
C342 0.1u
0.1uC325
RADIO_L
RADIO_R
CLK32K
Page 74
- 75 -
4. TROUBLE SHOOTING
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
CHECKING FLOW
STAR
T
NO
Check the VRABB Voltag e(2.8V)
O.
K?
Check t he sold erin g
statu s Of C327
O.K?
YES
Check t he sig nal o f C325, C328
Can you see a si gnal
YE
S
Go to the speaker/
EAR_MIC Tr ouble
shooting
?
Go to th e Pow er Trouble
shooting
NO
Solde rin g t he C315
NO
YE
YES
FM IC is problem .
Replace t he U3
Check 32.76 8kH z signal
of C341
Can you see a signal
S
04
NO
The CLK Buf fer is
problem.
Replace t heU306
?
Page 75
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4.16 Camera Trouble
Check Points
-Camera LDO’s working correctly
-EMI filter soldering
-Connector combination
4. TROUBLE SHOOTING
- 76 -
TEST POINT
WAVE FROM
2V8_CAM
100K
R326
FB303
NC
52
NR
OUT
1
PGND
7
TPS79928DRVR U303
EN
43
GND
IN
6
0.1u
C324
C322
0.01u
VBAT
C323
2.2u
2V8_CAM_EN
1V8_CAM
R330
20K
6
BGND
2
GND
5
SELSTBY
1
3
VIN VOUT
4
BH18PB1WHFVU305
VBAT
0.1u
C340 2.2u
FB308
C339
1V8_CAM_EN
CIRCUIT
TP 1
TP 2
TP 3
TP 4
TP4
TP3
U304
C327
U305
R330
U306
C328
C325
C343
U303
R326
2V8_CAM_EN
1V8_CAM_EN
TP2
TP1
2V8_CAM_OUTPUT
1V8_CAM_OUTPUT
Page 76
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 77 -
CHECKING FLOW
START
Pow er is supplied to
the boar
Yes
d?
First of all, Go to menu B aseband Camera Main LCD Preview
LCD Displ ay OK?
Yes
Check C onnectio n
1. Cam Module
2. FPCB
Yes
Path s of Ca mera control
sig nals are OK ?
Yes
No
No
No
No
Refer to
Pow er On Trouble
Refer to
LCD Displ ay Trouble
Reconn ect FPCB or
Camera Module
Re-solder
Conne cto r
FPCB OK?
Yes
Camera Prev iew Check?
Yes
Camera Working well
No
No
No
Replace t he FPCB
The Camera is broken.
Change th e Camera.
DBB have some problem .
Change th e
DBB.
Page 77
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
5.1 Download Setup
5. DOWNLOAD
- 78 -
5. DOWNLOAD
Figure 5-1 describes Download setup
UART
(If you have battery, no TA is needed)
Page 78
- 79 -
5. DOWNLOAD
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
5.2 Download Procedure
5.2.1 Computer Program file
→→
MultiGSM.EXE Click
1. Copy "GSMULTI" Folder. Paste in " C:\"
2. Execute "GSMULTI.reg file" Registered at PC
3. "MultiGSM.exe" execution file
Page 79
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
5. DOWNLOAD
- 80 -
5.2. 2 Click the “Setting” button.
Then, choose Configuration which is going to download.
4. Munu "Setting" "Configuration"
KP151Q
KP151Q AT-00-V09f-724-06-JUN-23-2008+0.raw
Page 80
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
5. DOWNLOAD
- 81 -
5.2.3 Computer Program file
→→
MultiGSM.EXE Click
5. Configuration : select values like below
Phone software select( *.cab file)
2
Download speed
3
C;\GSMULTI\MODEL\KP151Q\KP151Q.dll
1
Start Comport
4
5
END Comport
6
Frame count select
7
internal Boot
8
O.K
Page 81
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
5.2.4 Computer Program file
→→
MultiGSM.EXE Click
5. DOWNLOAD
- 82 -
6. Press the " START" button
KP151Q
KP151QAT-00-V09f-724-06-JUN-23-2008+0.raw
Page 82
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
5. DOWNLOAD
- 83 -
5.2.5 After “Start Button”, Which Stand-by condition
7. Stand-by condition "TI(EX) : Wait ASI" is displayed connect the Phone
KP151Q
KP151QAT-00-V09f-724-06-JUN-23-2008+0.raw
Page 83
- 84 -
5. DOWNLOAD
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
5.2.6. SW downloading condition
Downloading : Start
KP151Q
KP151Q AT-00-V09f-724-06-JUN-23-2008+0.raw
Page 84
- 85 -
5. DOWNLOAD
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
5.2.7 SW downloading END condition
Downloading : END
KP151Q
KP151Q AT-00-V09f-724-06-JUN-23-2008+0.raw
Page 85
- 86 -
6. BLOCK DIAGRAM
6. BLOCK DIAGRAM
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
**Note :
Control
Signal
Digital
Data
Analog
Signal
Power
SIM
Vibrator
ASM,SAW
FM Radio
(SI4702)
(SKY77318)
64Mb PSRA
(VGA)
Camera
65K Colors
128x128
LCD
124Mb NOR
&
PAM
CIF
ELCD
M
EMIFS
DBB + Tranceiver
(Locosto)
I2
C
26MHz
800mAh
Li-io
n
IC
CNN
Charging
(Triton Lite)
ABB
UART
SPK
MIC
EAR
18pin
Earphone
AMP
SPK
RCV
RCV
32.768KHz
Page 86
- 87 -
PWR
URXD
UTXD
3G 2.5G
GND
RX
TX
VCHAR
ON_SW
VBAT
GND
IN
OUT
3
1.8/2.85
C
7
20
D
F
E
VRABB
SIM_CONNECTOR
VREXTH
2.8
Domain
3.3
Isolate
B
1.8/2.8
Current(mA)
E
VREXTL
13
3
D
20
15
C
1
C
5
100
TEST TP
1.8
1.3/1.4/1.05
VRRTC
7
2
200
1.8/2.8
20
F
10
A
8
VRWLED
VRMEM
VRUSB
VRIO
E
Place closest to U102.G16
D
C
12
5
15
16
VRMMC
10 11
VRPLL
VRSIM
14
F
D
15
A
1
200/100
1.3/1.05
1.8
Place closest to U102.H16
200
Place closest to U13
8
1.8/2.85
96
Voltage(V)
100
4
200
9
B
6
1.8
3
E
H/W REV.
2 4
C140
H/W REV.
N.A.
80
0.1u
VBAT
0.1u
C130
V_ABB
C126
V_IO
10u
15p
C106
R113 0
R132
100K
47KR125
D102
DNI_DIODE_1006
U11
VRMEM
VRMMC
T10
VRPLL
T12
VRRTC
N17
A3
VRSIM
VRUSB
B8
B14
VRWLED_1
VRWLED_2
A15
T3
VSP_VCK
VSP_VDR
T4
T2
VSP_VDX
U3
VSP_VFS
M12
WAKEUP1
VBUS
B9
L16
VCC1
VCC2_1
U10
T11
VCC2_2
C3
VCC3
VCC4_1
K16
K17
VCC4_2
VCC5_1
H16
VCC5_2
H17
VCC6
F10
A10
VCCS
VIBDR
U12
B2
VRABB
L17
VREXTH
G17
VREXTL
VRIO
J16
K1
SPKPD_1
SPKPD_2
K2
L1
SPKVDD_1
SPKVDD_2
L2
M9
STARTADC
T1
TCK
U1
TDI
TDO
U2
TESTRESET
K12
B17
TESTV
TMS
R1
B11
VAC
R17
VBACKUP
VBAT
B12
B10
VBATS
VBG
M16
F6
RCV_TEST4
REFGND
M17
REGEN
G12
RPWON
U13
T8
SCL1
SDA1
U7
SE0_VM_TXD_TEST3
B6
SIMDTC
M10
SPKGND_1
H1
N1
SPKGND_2
M6
SPKNA_1
SPKNA_2
M7
M1
SPKND_1
SPKND_2
M2
K6
SPKPA_1
SPKPA_2
L6
A2
NC2
NC3
A16
A17
NC4B1NC5
NC6
T17
NC7
U16
U17
NC8
B3
OE_INTN__TEST1
ONNOFF
U15
R16
OSC32KIN
T16
OSC32KOUT
R2
P1_INT2
PCHGAC
A12
A11
PCHGUSB
PCLKREQ
T15
PWON
T14
I2S_SDX
U5
I2S_WS
U6
F11
ICTLAC1
F12
ICTLAC2
ICTLUSB1
A13
ICTLUSB2
B15
A5
ID_USB
L12
IREF
LED_A
C16
LED_B
E17
F17
LED_C
M11
MCLK1
G6
MICBIAS
F2
MICIN
MICIP
G2
A1
NC1
J12
GND_DBB
T9
GND_PWR1
D16
GND_PWR2_1
C17
GND_PWR2_2
GND_PWR3
U8
GND_PWR4
A6
G16
GND_PWR5
F9
GND_VBUS
F16
HSDET
HSMIC
D2
HSMICBIAS
H6
G1
HSOL
F1
HSOR
HSOVMID
J6
I2S_SCK
T7
T6
I2S_SDR
B7
ADCIN3
ADCIN4
F7
ADCIN5
F8
E1
AUDVMID
AUXI_FMR
C1
B16
BM_PRECH
M8
BM_SEL
CKEN
H12
CLK32KOUT
P16
DAT_VP_RXD_TEST2
B4
DM_TXD_SPKR_L
A7
A8
DP_RXD_MIC_R
EARN
H2
EARP
J2
P2
FILTERAPLL
C2
FML
U101
T3031FZPH
0.1u
C146
0.1u
V_MMC
C144
22p
C145
100nHL101
2.2u
V_RTC
R134
DNI
GND1
2
4
GND2
HOT1
1
3
HOT2
C150
26MHz
W-191-866
X101
C114
47p
C128
VBAT
0.1u
R115 4.7K
22p
C147
VBAT
0.1u
V_IO
C132
2.2u
C149
R121
10K
V_IO
4
7
NC2
NC3
8
9
NC4
5
ON_SW
11
RTS
RX
2
3
TX
6
VBAT
V_EXTL
V_PLL
V_USB
UA100
CTS
12
DSR
10
GND
1
NC1
DNI
R123
V_IO
VBAT
R124
DNI
15p
C104
1V8_CAM
L102 100nH
V_IO
C102
8.2p
TP104
0R112
100ohmR101
V_BACKUP
VCC
5
Y
4
1
_OE
1V8_CAM
U100
SN74LVC1G125DRLR
A
2
3
GND
TP109
V_EXTH
220K
R103
0.1uC131
0.01u
C100
R128
DNI
47p
R135
10K
C116
C148
0.1u
D100
V_SIM
SDB0530
V_USB
L100 100nH
OJ102
VBAT
0.1uC133
1000pC101
TP101
C112
4.7p
1u
C136
DNI_DIODE_1006
D103
R129
DNI
R127
91K
DNI
C123
C158
1u
DNI
R108
2.2KR111
VBUS
TP100
C163
MICBIAS
2.2u
C127
4.7u
C105
10p
0.1uC134
C137
OJ101
470n
15K
R118
V_IO
120KR106
1u
C135
0.1u
C152
X100
32.768KHz
MC-146_7pF
12
3
4
C111
TP103
0.1u
C125
1000p
DNI
C124
V_RTC
1u
C159
C129 0.1u
R131
100K
DNIR102
100K
R133
R104
220K
0.01u
C151
BAT100
C109
10p
0.1u
C153
C154
0.1u
V_SIM
C108
0.5p
R116 10K
C103
V_MEM
VDDRF1
8.2p
R107 10
C141 0.1u
4.7u
C162
1u
C120
VDDA
R120
DNI
10K
R130
3.3
R126
4.7KR114
82R117
0.1u
C138
VCC
1
5
VPP
47p
C115
J100
3
CLK
4
GND1
GND2
7
8
GND3
GND4
9
GND5
10
6
IO
RST
2
C156
1u
TP108
C161
100K
R122
1u
0.01u
DNI
R136
C110
DNIR100
C155
V_SIM
OJ103
1u
C121
0.1u
0.1uC139
TP102
R119
DNI
0.1u
C113
C142
1u
TP107
OJ100
DNI_DIODE_1006
D101
2.2u
C143
V_IO
VBUS
4.7n
C118
L103
2.2uH
C119
4.7u
470n
C157
1u
R109
2.2K
C160
1000p
C107
47n
C117
4.7u
C122
B
C
E
V_SIM
R110 2.2K
DTC144EM-T2L
Q100
VSSRF5
E15
VSSX
VSS_PLL
B14
WAKEUP_REQ
R8
U15
XANATST3
U16
XANATST4
XANATST5
T16
XANATST6
R17
XTAL
D15
VSS6
T14
VSS7
VSS8
U12
VSS9
U5
VSSA1
M13
N15
VSSA2
J14
VSSOSC1
J15
VSSOSC2
H15
VSSOSC3
U11
VSSPBIAS
VSSRF1
M15
VSSRF1_1
G15
VSSRF1_2
H14
L15
VSSRF2
VSSRF3
K15
VSSRF4
K14
L13
U10
T12
VDD_USIM
VDR
M8
VDX
T6
VFSRX
K9
B17
VPP1
VPP2
A17
VREF
E17
VREF1
R16
VSS1
R1
U8
VSS10
C17
VSS11
H1
VSS2C1VSS3A7VSS4
A10
VSS5
A12
R10
U6
VDD_DBB2N1VDD_DBB3
VDD_DBB4B4VDD_DBB5
B15
A11
VDD_DBB6
VDD_DBB7
A8
A13
VDD_DBB8U3VDD_IO1
VDD_IO2U7VDD_IO3
A15
C9
VDD_IO4A3VDD_IO5
K1
VDD_MIF1
VDD_MIF2E1VDD_PLL
C13
VDD_RST
USB_TXEN_UART_RTS
P10
USIM_CLK
R11
USIM_IO
T11
USIM_PBIAS
USIM_PWCTRL
M10
USIM_RST
N11
VCLKRX
R7
VDDA1
P16
VDDA2
P15
H16
VDDOSC
VDDR1RX
T15
VDDR1TX1
F16
VDDR2
F15
H17
VDDRF
G16
VDDRF1
D16
VDDX
VDD_DBB1
F12
H10
TSPACT12
TSPACT13
C14
E12
TSPACT14
G10
TSPACT15
R9
TSPACT9_GPIO_4_CDI
G17
TXHB
F17
TXLB
R2
UART_CTS
UART_RTS_SD_IRDA
R3
L7
UART_RX
P3
UART_TX
T10
USB_BOOT_GPIO_3_LPG
R5
USB_DATA_UART_RX
T4
USB_RCV_UART_CTS
L8
USB_SE0_UART_TX
M7
M16
RXEGSMP
L16
RXGSMM
N17
RXGSMP
M17
RXPCSM
J16
K16
RXPCSP
N7
SCL_TRIT
SDA_TRIT
R6
A16
SENSE
U2
SPARE2
U1
SPARE3
TCKA1TDIB1TDOB2TMSA2TRSTN
T2
TSPACT11
G13
F13
NC5
NC6
N12
M12
NC7
NC8
L12
K12
NC9
L5
NCS3
D3
ND_CE1
ND_NWP_CAM_D4
E5
M1
NMOE
ONNOFF
N10
D4
RES1
R14
RES2
RNW
L1
K17
RXDCSM
RXDCSP
L17
RXEGSMM
NBHE
NBLE
M2
NBSCAN
T1
K13
NC1
J12
NC10
NC11
H12
NC12
G12
NC13
L11
K11
NC14
NC15
J11
H11
NC16
L10
NC17
NC18
K10
J10
NC19
J13
NC2
H13
NC3
NC4
KBC1
KBC2
E13
C15
KBC3
F11
KBR0
E11
KBR1
KBR2
C12
H9
KBR3
LCD_DAT_NDF_0
E9
B8
LCD_DAT_NDF_1
C8
LCD_DAT_NDF_2
E8
LCD_DAT_NDF_3
LCD_DAT_NDF_4
B7
D8
LCD_DAT_NDF_5
LCD_DAT_NDF_6
C7
LCD_DAT_NDF_7
B6
C10
LCD_NRST
L3
E3
GPIO_40_NRDY
M3
J7
GPIO_41_ADV
GPIO_42_CKM
L6
GPIO_43_MCSI_CK
N3
GPIO_44_MCSI_FS
M5
K7
GPIO_45_MCSI_TX
GPIO_46_MCSI_RX
P2
GPIO_5_TSPACT8
N9
G6
GPIO_7_NFWP_CAM_D2
GPIO_8_KBR4
F10
GPIO_9_KBC4
B12
R4
I2C_SCL
N6
I2C_SDA
R15
IREF
KBC0
G11
C16
A5
G9
GPIO_23_SPI_CLK
GPIO_24_SPI_MISO
F7
GPIO_25_SPI_MOSI
C5
GPIO_26_SPI_NCS0
E6
GPIO_27_SPI_NCS1
G8
GPIO_28_SPI_NCS2_CAM_D7
C4
G7
GPIO_29_BU_CAM_D6
GPIO_2_PWL
T3
GPIO_30_LT3_CAM_D5
B3
C3
GPIO_31ND_RE
F6
GPIO_32ND_CLE
H8
GPIO_33ND_ALE
C2
GPIO_34ND_RDY
GPIO_35_NCS2
F5
GPIO_36_NCS1
D2
GPIO_38_NCS0
J4
DATA_ADD9
J6
M6
DCD_TXIR_GPIO_0_CAM_D1
N5
DSR_RXIR_GPIO_47_CAM_D0
K6
FDP
B16
FORCE
GPIO_10_NEMU0
C11
D10
GPIO_11_NEMU1
GPIO_12_LPG_TSPACT10
B11
E10
GPIO_13_LCD_NCS0
B10
GPIO_14_LCD_STB
GPIO_15_LCD_RNW
F9
GPIO_16_LCD_RS
D9
GPIO_17_LCD_NCS1
B9
GPIO_18_ND_WE
A6
K8
GPIO_1_PWT
GPIO_21_CAM_LCLK
P9
M9
CSYNC
K4
DATA_ADD0
DATA_ADD1
L2
DATA_ADD10
H2
H3
DATA_ADD11
H5
DATA_ADD12
DATA_ADD13
G2
DATA_ADD14
G1
H4
DATA_ADD15
K5
DATA_ADD2
DATA_ADD3
K3
K2
DATA_ADD4
J5
DATA_ADD5
J3
DATA_ADD6
DATA_ADD7
J2
DATA_ADD8
H7
T17
ANATST1
ANATST2
U17
R12
APC_LDO_FILTER
APC_OUT
M11
APC_SPARE1
L9
APC_VDO
U13
APC_VREF
R13
N13
APC_VSS
F8
CAM_D3_GPIO_19_CAM_HS
E7
CAM_D3_GPIO_20_CAM_VS
C6
CAM_D3_GPIO_22_CAM_XCLK
CD0
T9
T7
CK13MHZ_EN
T8
CKIN_32KHZ
N8
CKOUT_13MHZ
CSCLK
ABB_IRQ
P8
ADD16
G3
ADD17
F1
ADD18
F2
H6
ADD19
J8
ADD20
ADD21
F3
ADD22_GPIO_39
G5
ADD23_GPIO_37
TP106
U102
D6591BUZPH
R105
1.5M
CAM_D(3)
USB_BOOT
CAM_VS
_FM_RESET
VCHG
UART_DSR
SIM_CTL
LCD_RESET
UART_DSR
CAM_PWDN
HOOK_DETECT
MLED1
VRWLED
CAM_MCLK
CKOUT_13MHZ
SIM_CTL
POP_NOISE
MOTOR_P
ANT_SW1
EGSM_RXN
EGSM_RXP
PCS_RXP
PCS_RXN
CAM_D(7)
CAM_RESET
EAR_N
EAR_P
SIM_IO SIM_CLK
SIM_RST
CHG_EN
SPK_EN
CAM_PCLK
CAM_HS
LCD_ADS
_LCD_WR
DITHERING
LED_B_EN
CAM_D(2)
FOLDER
LED_R_EN
KEY_BACKLIGHT
CAM_D(5)
UART_TX
UART_RX
RPWON
CAM_D(6)
SIM_PW_CTL
_LCD_SUB_CS
2V8_CAM_EN
CAM_D(4)
1V8_CAM_EN
EOC
LCD_D(0:7)
KBR(0)
USB_BOOT
HSOL
DCS_RXP
DCS_RXN
MLED2
FM_INT
USB_DP
USB_DM
LCD_ID
CAM_D(0)
_LCD_MAIN_CS
DITHERING
JACK_DETECT
CLK32K
RPWON
TEMPSENSE
BATT_TEMP
STARTADC
UART_CTS
UART_RTS
RPWON
UART_DSR
USB_DP
USB_DM
UART_TX
UART_RX
SPKPA
RADIO_L
RADIO_R
HSMIC
MICIP
MICIN
VCHG
CKEN
CKM
nCS0
JTAG_TRST
JTAG_TMS
JTAG_TCK
JTAG_TDO
JTAG_TDI
SPKNA
ADD(17)
ADD(18)
ADD(19)
ADD(20)
ADD(21)
ADD(22)
RnW
nBHE
nBLE
nMOE
nCS3
FDP
nRDYMEM
nFADV
DATA_ADD(2)
DATA_ADD(3)
DATA_ADD(4)
DATA_ADD(5)
DATA_ADD(6)
DATA_ADD(7)
DATA_ADD(8)
DATA_ADD(9)
DATA_ADD(10)
DATA_ADD(11)
DATA_ADD(12)
DATA_ADD(13)
DATA_ADD(14)
DATA_ADD(15)
ADD(16)
KBR(2)
KBR(1)
KBC(4)
KBC(3)
KBC(2)
KBC(1)
KBC(0)
CLK32K
CKEN
TXHB
GSM_RXN
GSM_RXP
TXLB
DATA_ADD(1)
PA_BAND
LCD_D(7)
LCD_D(6)
LCD_D(5)
LCD_D(4)
LCD_D(3)
LCD_D(2)
LCD_D(1)
LCD_D(0)
SIM_RST
SIM_CLK
SIM_IO
SIM_PW_CTL
KBR(3)
DATA_ADD(0)
I2C_SDA
CAM_D(1)
STARTADC
TX_RAMP
ANT_SW2
PA_EN
CKOUT_13MHZ
UART_CTS
UART_RTS
UART_RX
UART_TX
P1_INT2
KBR(4)
I2C_SCL
7. CIRCUIT DIAGRAM
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 87
- 88 -
5
2 5
7
SEND
MENU
7
A
4
1
RIGHT
D
V_DN
C
*
3
D
CLEAR
8
END
HANDSET MICROPHONE
1
2 84
5
SOFT1
6 9
2
0
6
E
A
10
SPK
OK
1
UP
DOWN
9
4
KEY BACKLIGHT
LEFT
Memory (128Mb Nor + 64Mb pSRAM)
3
KEYPAD
V_UP
B
SPEAKER AMPLIFIER
3
#
C211
C207 47p
47p
LD200
LD201
LEWW-S14
TP201
VBAT
LEWW-S14
100ohm
R223
C206
47p
DNI
VA205
C212 C213
DNI
C218
680R228
VO+
B3
VO-
A1B1
_SHUTDOWN
1u
TPA6205A1ZQVRU200
BYPASSC1GND
B2
C2
IN+
IN-
C3 A3
VDD
NC6
H12
K1
NC7
K14
NC8
OE_
F12
R_CE_
H7
H8
R_CRE
C7
R_LB_
R_UB_
C8
D7
VCC
VCCQ1
E3
VCCQ2
G10
VSS1
D5
VSS2
F3
VSSQ1
G5
VSSQ2
E12
WE_
D8
D6
CLK
C4
DNU1
C11
DNU2
DNU3
E7
DNU4
H4
H11
DNU5
D9
F_ACC
E11
F_CE_
D3
F_RDY_R_WAIT
E8
F_RST_
F_WP_
E9
NC1
A1
NC2
A14
NC3
C3
NC4
C12
NC5
H3
G12
A_DQ0
A_DQ1
G11
G9
A_DQ10
A_DQ11
G8
A_DQ12
F7
A_DQ13
F6
G4
A_DQ14
G3
A_DQ15
A_DQ2
F9
F8
A_DQ3
G7
A_DQ4
G6
A_DQ5
F5
A_DQ6
A_DQ7
F4
F11
A_DQ8
F10
A_DQ9
S71NS128PC0
A16
E4
A17
D11
E10
A18
A19
D10
E5
A20
D4
A21
D12
A22
AVD_
E6
LD205
U201
0.1u
LEWW-S14
C220
R229 10K
680R238
KB207
C204 220n
0
KB218
R209
FB200
R222
100ohm
R208
4.7
TP204
OK
R200 20K
680R234
220nC205
R206
10K
TP202
R233 680
V_MEM
680R232
R213 150
KB201
C214
LEWW-S14LD208
47p
LEWW-S14LD209
R220
100ohm
KB217
R210
100K
C215
47p
100ohm
DNI
R225
R221
KB203
100ohm
R216
KB214
R224
100ohm100ohm
R219
EVLC14S02050VA203
VA201 EVLC14S02050
0R227
R230 680
LEWW-S14LD206
100K
R211
22nC224
KB208
C221
10u
C202
0.1u
R226 680
SOFT
1K
R214
39p
KB209
C217
C219
1u
C209
R217
100ohm
2.2u
TP203
CLEAR
C223
DNI
5.1KR203
SPM0204LE5-QB
2
G1
3
G2
G3
4
G4
6
OUT
1
5
PWR
DNI
V_MEM
MIC200
KB211
C200
DNI
C225
DNIC201
EVLC14S02050VA200
KB213
100nH
L200
KB204
KB216
KB200
0.1u
C216
R202
4.7
TP200
R215
100ohm
L201
100nH
KB206
EVLC14S02050
VA202
680R236
12345
R212
100K
R235 680
CN200
MICBIAS
47p
C210
1
C208
1u
2SC5585
Q200
2
3
R237 680
LEWW-S14LD204
VA204 EVLC14S02050
KB212
R207 51
5.1KR204
R205
KB202
0
R201 20K
100K
R231
KB205
KB215
VBAT
C222 22n
LEWW-S14LD207
R218
100ohm
0.1u
C203
LD202
KB210
LEWW-S14
LEWW-S14
CKM
LD203
KBC(2)
SPK_P
SPK_N
ADD(22)
RPWON
KBC(0)
KBC(1)
KBR(0)
KBC(4)
KBR(4)
KBR(3)
KBR(2)
KBR(1)
KEY_BACKLIGHT
KBC(3)
SPKNA
nBLE
nRDYMEM
RnW
nMOE
nFADV
FDP
nCS3
MICIN
MICIP
SPKPA SPK_EN
DATA_ADD(7)
DATA_ADD(8)
DATA_ADD(9)
DATA_ADD(10)
DATA_ADD(11)
DATA_ADD(12)
DATA_ADD(13)
DATA_ADD(14)
DATA_ADD(15)
ADD(16)
ADD(17)
ADD(18)
ADD(19)
ADD(20)
ADD(21)
nBHE
nCS0
DATA_ADD(0)
DATA_ADD(1)
DATA_ADD(2)
DATA_ADD(3)
DATA_ADD(4)
DATA_ADD(5)
DATA_ADD(6)
7. CIRCUIT DIAGRAM
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 88
- 89 -
D
Check direction on top side
5
JTAG
7
E
1
D
5
GP(SS)
(50V,J,NP0)
23 10 15
7
F
CAMERA LDO
A
6 1312
INDICATOR LED SWITCH
9
BATTERY CONNECTOR
C
I/O CONNECTOR
8
C
B
E
4
F
16
MAKER
FOLDER SENSE
HIGH 1.8V
CHARGING
3
E
D
4
Voltage
NA
D
2
1
A
FM RADIO
LOW
(2012)
ON BOARD JTAG I/F CONNECTOR
8 11
ID
(10V,Z,Y5V)
B-to-B CONNECTOR
C
6
0V
B
C
GP(NOVA-TFT)
9
E
14
F
G15G2
10
1
INOUT_A1
INOUT_A2
2
INOUT_A3
3
4
INOUT_A4
INOUT_B1
9
8
INOUT_B2
INOUT_B3
7
INOUT_B4
6
VA307
FL301
EVRC14S03Q030100R
C320
2200p
0.1u
1V8_CAM
C310
R312
100K
20KR300
C302
DNI
FB304
1.2KR317
VA301
300R313
V_IO
FB399
R308
47K
2V8_CAM
VBUS_IN
2V8_CAM
22uC321
C303
18p
C341 0.1u
4
R315
100K
UMX1NTN
Q300
2
56
31
C343
27p
R318
0
100K
R326
C338
0.1u
C315
0.1u
INOUT_B2
INOUT_B3
7
INOUT_B4
6
VA304
G15G2
10
1
INOUT_A1
INOUT_A2
2
INOUT_A3
3
4
INOUT_A4
INOUT_B1
9
8
FB303
FL302
ICVE10184E050R101FR
C326
VA305 10u
C316
1V8_CAM
1u
FB305
4.7K
R329
3
1
OUT
5
PGND
4
VDD
C312
0.1u
U301 BU52031NVX
2
GND NC
FB300
22R323
VA309
22n
C337
22n
R328
100ohm
C336
100ohm
R327
4.7u
C330
R330
20K
100K
R301
VA308
0.1uC319
R302
33K
VBAT
TDO
TMS
TX
VCC
VBAT
VBAT
JTG300
GND
RX
TCK
TDI
24p
C332
2.2K
R320
0.1u
C311
LD300
12
34
R316
150
120p
47R324
C317
VA306
V_ABB
100nH
FB301
L300
C331
V_IO
VBAT
56p
C335
1u
C301
ICVL0505101V150FR
R321
6
BGND2GND
5
SELSTBY
1
3
VIN VOUT
4
47K
BH18PB1WHFVU305
52
53
54
6
7
8
9
VA302
38
39
4
40
41
42
43
44
45
46
47
48
49
550
51
23
24
25
26
2728
29
3
30
31
32
33
34
35
36
37
1
10
11
12
13
14
15
16
17
18
19
2
20
21
22
VBAT
V_IO
CN301
0.1u
C313
R310 10K
V_IO
C308
INOUT_A3
INOUT_A4
4
9
INOUT_B1
INOUT_B2
8
7
INOUT_B3
6
INOUT_B4
0.1u
EVRC14S03Q030100R
FL303
5
G110G2
INOUT_A1
1
2
INOUT_A2
3
C328 0.1u
VBAT
10KR311
ICVE10184E050R101FR
FL304
5
G110G2
INOUT_A1
1
2
INOUT_A2
3
INOUT_A3
INOUT_A4
4
9
INOUT_B1
INOUT_B2
8
7
INOUT_B3
6
INOUT_B4
C309
V_IO
V_IO
27p
270nH
L301
10u
C300
FB307
BLM15AB601SN1
2200p
C329
33K
R306
5.6K
R303
16K
R304
R331 47K
VCHG_IN
varistor
VA300
22R322
R309 100ohm
V_EXTH
R305
DNI
100K
R314
C327 100p
NC
52
NR
OUT
1
PGND
7
0.1uC325
TPS79928DRVR U303
EN
43
GND
IN
6
0.1u
C324
V_IO
L302
100nH
C318
1u
C342
G15G2
10
1
INOUT_A1
INOUT_A2
2
INOUT_A3
3
4
INOUT_A4
INOUT_B1
9
8
INOUT_B2
INOUT_B3
7
INOUT_B4
6
0.1u
FL300
ICVE10184E050R101FR
FB302
0.1uF
C306
10u
C333
27p
C307
V_IO
VA303
5
G110G2
INOUT_A1
1
2
INOUT_A2
3
INOUT_A3
INOUT_A4
4
9
INOUT_B1
INOUT_B2
8
INOUT_B3
7
6
INOUT_B4
5
_EN
_PPR
3
VCHG_IN
VBUS_IN
EVRC14S03Q030100R
FL305
11
BAT
GND
8
IMIN
6
7
IUSB
9
IVDC
PGND
13
USB_BYP
10
1
VDC
12
VDC_BYP
VUSB
2
4
_CHG
FB306
U300 ISL9221
R319
2.2K
V_ABB
C322
0.01u
V_IO
VBAT
R307
0.1u
DNI
B0
4
B1
6
5
GND
1
S
2
VCC
C340
5
VCC
FSA4157L6X
U302
3
A
U306
TC7SH04FS
2
GND
14
R325 47
RFGND
13
ROUT
SCLK7SDIO
8
16
VA
11
VD
VIO
10
5
_RST
6
_SEN
U304
SI4702-C19-GM
2
FMIP
4
GND1 GND2
12
GND3
15
GPIO1
19
18
GPIO2
GPIO3
17
14
LOUT
NC1
1
20
NC2
PGND
21
9
RCLK
3
C323
1u
2.2u
3
4
5
6
7
8
9
C334
1
10
11
12
13
14
15
16
17
18
19
2
20
21
22
CN302
GU041-18P-E1000
VCHG VBUS
C305
0.1uF0.1uF
C304
2.2u
VBAT
FB308
C339
CN300
HSBC-3P-65
1
23
IND_LED_R
IND_LED_B
V_IO
C314
1000p
EOC
CHG_EN
IND_LED_R
IND_LED_B
IND_LED_R
CAM_PWDN
MLED2
EAR_P
1V8_CAM_EN
2V8_CAM_EN
IND_LED_B
SPK_P
LCD_RESET
MOTOR_P
I2C_SDA
EAR_N
VRWLED
MLED1
SPK_N
I2C_SCL
CAM_MCLK
CAM_PCLK
CAM_HS
CAM_VS
USB_DP
USB_DM
FOLDER
POP_NOISE
RPWON
_LCD_SUB_CS
JTAG_TRST
JTAG_TMS
JTAG_TCK
JTAG_TDI
JTAG_TDO
CAM_D(3)
CAM_D(2)
CAM_D(1)
CAM_D(0)
FM_ANT
UART_DSR
_FM_RESET
I2C_SDA
I2C_SCL
FM_ANT
FM_INT
LCD_D(0:7)
JACK_DETECT
RADIO_L
RADIO_R
CLK32K
LCD_D(0)
LCD_ADS
CAM_D(0:7)
CAM_D(7)
CAM_D(6)
CAM_D(5)
CAM_D(4)
CAM_RESET
_LCD_WR
LCD_ID
_LCD_MAIN_CS
LCD_D(7)
LCD_D(6)
LCD_D(5)
LCD_D(4)
LCD_D(3)
LCD_D(2)
LCD_D(1)
UART_TX
UART_RX
HSMIC
BATT_TEMP
LED_B_EN LED_R_EN
HOOK_DETECT
HSOL
7. CIRCUIT DIAGRAM
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 89
- 90 -
HL
7
23
B
6
6
close to DBB
5
4
850/900 TX
4
1
10
H
E
C
1800/1900 RX
1
5
A
83
7
D D
9
C
A
1800/1900 TX
850/900 RX
MODE ANT_SW1 ANT_SW2
H
L
L
H
L
2
0.5p
C415
C436
4p
3.3nH
L400
0.01u
C407
100p
1.5p
C404
C425
ANT
G1
G2
RF
R401
0
GRS300-2S-H36-E3000
SW400
47R404
DNI
C418
ECCH0003002
C405
C2012JF1A106ZT
3.5p
C426
10u
3.5p
C427
ANT400
PT400
22K
V_EXTH
C419
DNI
C428
2.7p
1.5p
C402
2.7p
C429
47R405
R400
15K
3.5p
C430
C434
3.5p
L409
15nH
4p
C435
4.7K
GND814GND9
16
21
P_GND
19
RSVD_GND
VAPC
20
17
VBATT
2
VCC1A
6
VCC1B
R408
BS
1
DCS_PCS_IN
315
DCS_PCS_OUT
4
EGSM_IN
11
EGSM_OUT
ENABLE
18
GND1
5
7
GND28GND3
GND4
9
10
GND5
GND6
12
13
GND7
C400
SKY77318
U400
1000p
68p
C433
C412
180p
DNI
C424
C410
ANT403
15p
47p
C413
C421
0.5p
27p
C423
1.5p
C422
0.5p
C403
C417
1p
47nH
L405
5.1nH 3.9nH
L407
1.5p
L406
C414
ANT401 ANT402
L410
2.7nH
0.01u
C408
R406
270K
0.01u
VBAT
10nH
L404
C406
R403
10
39p
C409
C431
1000p
R407
680
VDDRF1
1.8nH
L402
C411
DNI
18nH
L403
1nH
L401
3.3nH
L411
15nH
L408
NC123NC2
24
VC1
19
20
VC2
VDD
21
V_EXTH
2.2p
C401
GND3
12
13
GND4
GND5
14
16
GND6
GND7
18
GND8
22
15
GSM1800_1900_TX
3
GSM1800_RX1
GSM1800_RX2
4
1
GSM1900_RX1
GSM1900_RX2
2
GSM850_900_TX
17
7
GSM850_RX1
GSM850_RX2
8
5
GSM900_RX1
GSM900_RX2
6
LMSP43QC-789TEMPFL400
ANT
11
9
GND1
10
GND2
1.8nH
L412
C432
GSM_RXN
GSM_RXP
EGSM_RXN
EGSM_RXP
1000p
ANT_SW1
ANT_SW2
TXLB
TXHB
TX_RAMP
PCS_RXN
PCS_RXP
DCS_RXP
DCS_RXN
TEMPSENSE
PA_BAND
PA_EN
7. CIRCUIT DIAGRAM
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 90
- 91 -
4
C
105
A
1
5
2
6
B
A
FPCB to PCB INTERFACE CONNECTOR
3
(LCD_SUB_CS open)
LCD_SUB_CS open
7
3
D
1
(Reverse Connecoion)
AXK720147G (0.4pitch, 1.5t)
8
SPEAKER, RECEIVER,MOROR PAD
VGA CAMERA CONNECTOR
D
4
92
LCD to FPCB INTERFACE CONNECTOR
E
OUT103
PRSB6.8C
D2 D1
PRSB6.8C
V_IO
OUT104
1V8_CAM
2V8_CAM
OUT100
V_EXTH
TP2
OUT105
33
34
35
4
5
6
7
8
9
18
19
2
20
21
22
23
24
25
26
27
28
29
3
30
31
32
CN101
1
10
11
12
13
14
15
16
17
OUT101
1V8_CAM
9
V_EXTH VBAT
43
44
45
46
47
48
49
550
51
52
53
54
6
7
8
29
3
30
31
32
33
34
35
36
37
38
39
4
40
414214
15
16
17
18
19
2
20
21
22
23
24
25
26
2728
CN100
1
10
11
12
13
14
15
16
17
18
192
20
3
4
5
6
7
8
9
CN102
1
10 11
12
13
V_IO
2V8_CAM
OUT102
MODE
EAR_N
EAR_P
LCD_D(6)
LCD_D(7)
_LCD_MAIN_CS
_LCD_WR
LCD_RESET
LCD_ADS
LCD_D(0)
LCD_D(1)
LCD_D(2)
LCD_D(3)
LCD_D(0:7)
LCD_ID
VRWLED
MLED1
MLED2
CAM_D(6)
CAM_D(7)
MOTOR_P
EAR_N
SPK_N
EAR_P
IND_LED_R
SPK_P
I2C_SCL
I2C_SDA
CAM_PWDN
IND_LED_B
LCD_D(4)
LCD_D(5)
CAM_D(6)
CAM_D(7)
MOTOR_P
SPK_N
SPK_P
CAM_PWDN
CAM_D(5)
CAM_D(0)
CAM_D(1)
CAM_PCLK
CAM_D(2)
CAM_D(3)
CAM_D(4)
CAM_MCLK
CAM_HS
CAM_VS
I2C_SDA
I2C_SCL
CAM_RESET
VRWLED
MLED2
MLED1
CAM_VS
CAM_HS
CAM_PCLK
CAM_MCLK
CAM_D(0)
CAM_D(1)
CAM_D(2)
CAM_D(3)
CAM_D(4)
CAM_D(5)
_LCD_WR
_LCD_MAIN_CS
LCD_ADS
LCD_ID
CAM_RESET
LCD_RESET
CAM_D(0:7)
LCD_D(0)
LCD_D(1)
LCD_D(2)
LCD_D(3)
LCD_D(4)
LCD_D(5)
LCD_D(6)
LCD_D(7)
LCD_D(0:7)
7. CIRCUIT DIAGRAM
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 91
- 92 -
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 92
- 93 -
8. BGA IC Pin Check
DBB (U102 : D6591BUZPH)
8. BGA IC Pin Check
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 93
- 94 -
8. BGA IC Pin Check
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
ABB (U101 : T3031FZPH)
Page 94
- 95 -
8. BGA IC Pin Check
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
ABB
Page 95
- 96 -
8. BGA IC Pin Check
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Memory (U201 : S71VS064KB0)
Page 96
- 97 -
9. PCB LAYOUT
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
KP151Q-MAIN-1.0-TOP
Page 97
- 98 -
9. PCB LAYOUT
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
CN301 FPCB conn.
No Display
No Vibrator
No Sound
U101 Triton lite(ABB)
No Power On
No Sound
No LED
U102 Locosto (DBB)
No Booting
No Service
No Display
U400 PAM
GSM TX Power
No Service
FL400 FEM
GSM Rx Sensitivity
No Service
U201 Memory
No Booting
KP151Q-MAIN-1.0-BOTTOM
Page 98
- 99 -
9. PCB LAYOUT
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
CN102 : Camera Connector
No Camera
KP151Q-FPCB-1.0-TOP
CN100 : FPCB Connector
No DIsplay,
No Camera
Page 99
- 100 -
9. PCB LAYOUT
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
CN101 LCD Connector
No Display
KP151Q-FPCB-1.0-BTM
Page 100
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
10. Calibration
- 101 -
10. Calibration
10.1 What’s the Rx Calibration?
10.1.1 Find proper AGC Gain to make the same Rx Power fed into the
Base Band Part regardless of Antenna Input Level
10.1.2 Can make report correct RSSI level
10. 2 What’s the Tx Calibration?
10.2.1 To make Tx Power Level transmitted properly following the
information sof Base Station
BB
Part
XY
G
X(Input Level)+G(Gain)=Y
Base
Station
Mobile
Station
GSM 5 Level
32.5 dBm
Tx Cal = In this case, to make
MS transmit 32.5dBm
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