KP110 SVC svc cover(5.5) 2008.2.22 1:48 PM ˘`1
Service Manual
Internal Use Only
Service Manual
KP110
Model : KP110
Date: February, 2008 / Issue 1.0
- 3 -
1. INTRODUCTION ...............................5
1.1 Purpose .................................................. 5
1.2 Regulatory Information............................ 5
1.3 Abbreviations .......................................... 7
2. PERFORMANCE...............................9
2.1 H/W Features...........................................9
2.2 Technical Specification ..........................10
3. TECHNICAL BRIEF ........................15
3.1 TX module (SKY77518, U502) ..............15
3.2 Transceiver (AD6548, U503) .................17
3.3 26 MHz Clock (Crystal, X501)) ..............19
3.4 MP3 IC (VC0978BRDA, U305) ..............20
3.5 Baseband Processor (AD6724, U104)...21
3.6 Keypad Switches and Scanning ............27
3.7 Microphone ............................................28
3.8 Headset Interface...................................29
3.9 Key Back-light Illumination.....................30
3.10 LCD Back-light Illumination..................31
3.11 VIBRATOR...........................................32
3.12 FM RADIO INTERFACE ......................33
3.13 Battery Charging ..................................35
4. TROUBLE SHOOTING ...................36
4.1 RF Component.......................................36
4.2 RX Trouble.............................................37
4.3 TX Trouble .............................................40
4.4 Power On Trouble..................................44
4.5 Charging Trouble ...................................46
4.6 Vibrator Trouble .....................................48
4.7 LCD Trouble...........................................50
4.8 Speaker Trouble ....................................54
4.9 SIM Card Interface Trouble....................56
4.10 Earphone Trouble ................................58
4.11 KEY backlight Trouble .........................60
4.12 Receiver Trouble..................................62
4.13 Microphone Trouble .............................64
4.14 RTC Trouble ........................................66
4.15 FM Radio Trouble ................................68
4.16 MP3 Trouble ........................................71
5. DOWNLOAD.......................................74
5.1 Download ...............................................74
6. BLOCK DIAGRAM ..........................80
7. CIRCUIT DIAGRAM ........................81
8. BGA IC Pin Check ..........................87
9. PCB LAYOUT..................................91
10. ENGINEERING MODE ..................93
10.1 BB Test [MENU 1]................................94
10.2 RF Test [MENU 2]................................95
10.3 MF mode [MENU 3] .............................96
10.4 Trace option [MENU 4] ........................97
10.5 Call timer [MENU 5] .............................97
10.6 Fact. Reset [MENU 6] ..........................97
10.7 S/W version..........................................97
11. STAND ALONE TEST ...................98
11.1 Introduction ..........................................98
11.2 Setting Method.....................................98
11.3 Means of Test ......................................99
12. AUTO CALIBRATION .................101
12.1 Overview ............................................101
12.2 Equipment List ...................................101
12.3 Test Jig Operation..............................102
12.4 Procedure ..........................................103
12.5 AGC ...................................................105
12.6 APC....................................................105
12.7 ADC ...................................................105
13. EXPLODED VIEW &
REPLACEMENT PART LIST ..... 107
13.1 Exploded View .................................. 107
13.2 Replacement Parts ............................109
13.3 Accessory ......................................... 121
Table Of Contents
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 4 -
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 5 -
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 common-carrier
telecommunication service of facilities accessed through or connected to it.
The manufacturer will not be responsible for any charges that result from such unauthorized use.
B. Incidence of Harm
If a telephone company determines that the equipment provided to customer is faulty and possibly
causing harm or interruption in service to the telephone network, it should disconnect telephone
service until repair can be done. A telephone company may temporarily disconnect service as long as
repair is not done.
C. Changes in Service
A local telephone company may make changes in its communications facilities or procedure. If these
changes could reasonably be expected to affect the use of the this phone 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 this model must be performed only by the manufacturer or its authorized
agent. The user may not make any changes and/or repairs expect as specifically noted in this manual.
Therefore, note that unauthorized alternations or repair may affect the regulatory status of the system
and may void any remaining warranty.
1. INTRODUCTION
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 6 -
1. INTRODUCTION
E. Notice of Radiated Emissions
This model complies with rules regarding radiation and radio frequency emission as defined by local
regulatory agencies. In accordance with these agencies, you may be required to provide information
such as the following to the end user.
F. Pictures
The pictures in this manual are for illustrative purposes only; your actual hardware may look slightly
different.
G. Interference and Attenuation
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.
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 7 -
1. INTRODUCTION
1.3 Abbreviations
For the purposes of this manual, following abbreviations apply:
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
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 milli watt
DSP Digital Signal Processing
EEPROM Electrical Erasable Programmable Read-Only Memory
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
- 8 -
1. INTRODUCTION
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
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
SAW Surface Acoustic Wave
SIM Subscriber Identity Module
SLR Sending Loudness Rating
SRAM Static Random Access Memory
PSRAM Pseudo SRAM
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
- 9 -
2. PERFORMANCE
2.1 H/W Features
2. PERFORMANCE
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Item Feature Comment
Standard Battery Li-ion, 3.7V 900mAh
Talk time Up to 230min : GSM Tx Level 7
Stand by time Up to 390 hours (Paging Period: 5, RSSI: -85 dBm)
Charging time Approx. 3 hours
RX Sensitivity -102dBm
TX output power
GSM900 : 32.5dBm(Level 5),
DCS : 29.5dBm(Level 0)
GPRS compatibility Class 10
SIM card type 3V,1.8V Small
Display MAIN : CSTN 128 × 128 pixel 65K Color
Hard icons. Key Pad
Status Indicator 0 ~ 9, #, *, Up/Down/Left/Right/Ok Navigation Key
Menu Key, Back Key, Send Key, PWR Key
ANT Internal
EAR Phone Jack Yes (Stereo)
PC Synchronization Yes
Speech coding EFR/FR/HR
Data Yes
Vibrator Yes
Loud Speaker Yes
Voice Recoding Yes
Microphone Yes
Speaker/Receiver O/O
Travel Adapter Yes
MIDI 64poly (Mono SPK)
Camera No
Bluetooth / FM Radio 76~108MHz supported
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2. PERFORMANCE
2.2 Technical Specification
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Item Description Specification
GSM900
TX: 890 + 0.2 x (N-1024) MHz (N=975~1023)
1Frequency Band
RX: 935 + 0.2 x (N-1024) MHz (N=975~1023)
DCS
TX: 1710.2 + 0.2x( N-512 ) MHz (N=512~885)
RX: 1805.2 + 0.2x( N-512 ) MHz (N=512~885)
2 Phase Error
RMS < 5 degrees
Peak < 20 degrees
3 Frequency Error < 0.1 ppm
GSM900
Level Power Toler. Level Power Toler.
5 33 dBm 2dB 13 17 dBm 3dB
6 31 dBm 3dB 14 15 dBm 3dB
7 29 dBm 3dB 15 13 dBm 3dB
8 27 dBm 3dB 16 11 dBm 5dB
9 25 dBm 3dB 17 9 dBm 5dB
10 23 dBm 3dB 18 7 dBm 5dB
11 21 dBm 3dB 19 5 dBm 5dB
4 Power Level 12 19 dBm 3dB
DCS
Level Power Toler. Level Power Toler.
0 30 dBm 2dB 8 14 dBm 3dB
1 28 dBm 3dB 9 12 dBm 4dB
2 26 dBm 3dB 10 10 dBm 4dB
3 24 dBm 3dB 11 8 dBm 4dB
4 22 dBm 3dB 12 6 dBm 4dB
5 20 dBm 3dB 13 4 dBm 4dB
6 18 dBm 3dB 14 2 dBm 5dB
7 16 dBm 3dB 15 0 dBm 5dB
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2. PERFORMANCE
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Item Description Specification
GSM900
Offset from Carrier (kHz). Max. dBc
100 +0.5
200 -30
250 -33
400 -60
600~ <1,200 -60
1,200~ <1,800 -60
1,800~ <3,000 -63
3,000~ <6,000 -65
5
Output RF Spectrum 6,000 -71
(due to modulation) DCS
Offset from Carrier (kHz). Max. dBc
100 +0.5
200 -30
250 -33
400 -60
600~ <1,200 -60
1,200~ <1,800 -60
1,800~ <3,000 -65
3,000~ <6,000 -65
6,000 -73
GSM900
Offset from Carrier (kHz) Max. (dBm)
Output RF Spectrum 400 -19
6
(due to switching transient) 600 -21
1,200 -21
1,800 -24
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2. PERFORMANCE
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Item Description Specification
DCS
Offset from Carrier (kHz). Max. (dBm)
Output RF Spectrum 400 -22
6
(due to switching transient) 600 -24
1,200 -24
1,800 -27
7 Spurious Emissions Conduction, Emission Status
GSM900
8Bit Error Ratio
BER (Class II) < 2.439% @-102 dBm
DCS
BER (Class II) < 2.439% @-102 dBm
9 RX Level Report Accuracy 3 dB
10 SLR 8 3 dB
Frequency (Hz) Max.(dB) Min.(dB)
100 -12 -
200 0 -
300 0 -12
11 Sending Response 1,000 0 -6
2,000 4 -6
3,000 4 -6
3,400 4 -9
4,000 0 -
12 RLR 2 3 dB
Frequency (Hz) Max.(dB) Min.(dB)
100 -12 -
200 0 -
300 2 -7
500
*
-5
13 Receiving Response 1,000 0 -5
3,000 2 -5
3,400 2 -10
4,000 2
*
Mean that Adopt a straight line in between 300 Hz
and 1,000 Hz to be Max. level in the range.
- 13 -
2. PERFORMANCE
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Item Description Specification
14 STMR 13 5 dB
15 Stability Margin > 6 dB
dB to ARL (dB) Level Ratio (dB)
-35 17.5
-30 22.5
-20 30.7
16 Distortion
-10 33.3
0 33.7
7 31.7
10 25.5
17 Side Tone Distortion Three stage distortion < 10%
18
System frequency
2.5ppm
(13 MHz) tolerance
19 32.768KHz tolerance 30ppm
At least 65 dBspl under below conditions:
20 Ringer Volume 1. Ringer set as ringer.
2. Test distance set as 50 cm
21 Charge Current
Fast Charge : < 600 mA
Slow Charge : < 120 mA
Antenna Bar Number Power
5 -85 dBm ~
4-90 dBm ~ -86 dBm
22 Antenna Display 3 -95 dBm ~ -91 dBm
2-100 dBm ~ -96 dBm
1-105 dBm ~ -101 dBm
0~ -105 dBm
Battery Bar Number Voltage
Power off 3.30V 0.05 V
23 Battery Indicator 0(blink) 3.54V 0.05 V
13.64V 0.05 V
23.75V 0.05 V
33.76V 0.05 V ~
24 Low Voltage Warning
3.54 0.05 V (Call) every 1 minutes
3.4 0.05 V (Standby)
- 14 -
2. PERFORMANCE
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Item Description Specification
25 Forced shut down Voltage 3.35 0.05V
1 Li-ion Battery
26 Battery Type
Standard Voltage = 3.7 V
Battery full charge voltage = 4.2 V
Capacity: 800mAh
Switching-mode charger
27 Travel Charger Input: 100 ~ 240 V, 50/60 Hz
Output: 4.8V ~ 6.4V, 400 mA
- 15 -
3. TECHNICAL BRIEF
3.1 TX module (SKY77518, U502)
The SKY77518 is a Transmit and receive front-end-module (FEM) with Integrated Power Amplifier
Control (iPAC) for dual-band cellular handsets comprising GSM800 and DCS operation. Designed in
a low profile, compact form factor, the SKY77518 offers a complete Transmit VCO-to-Antenna and
Antenna-to-Receive SAW filter solution. The FEM also supports class 12 General Packet Radio
Service (GPRS) multi-slot operation.
The module consists of a GSM800 PA block and a DCS PA block, impedance-matching circuitry for
50 ohm input and output impedances, TX harmonics filtering, high linearity and low insertion loss
PHEMT RF switches, diplexer and a Power Amplifier Control (PAC) block with internal current sense
resistor. A custom BiCMOS integrated circuit provides the internal PAC function and decoder
circuitry to control the RF switches. The two Heterojunction Bipolar Transistor (HBT) PA blocks are
fabricated onto a single Gallium Arsenide (GaAs) die. One PA block supports the GSM800 band and
the other PA block supports the DCS band. Both PA blocks share common power supply pads to
distribute current. The output of each PA block and the outputs to the two receiver pads are
connected to the antenna pad through PHEMT RF switches and a diplexer. The GaAs die, PHEMT
die, Silicon (Si) die and passive components are mounted on a multi-layer laminate substrate. The
assembly is encapsulated with plastic overmold.
Band selection and control of transmit and receive modes are performed using two external control
pads. Refer to the functional block diagram in Figure 3.1 below. The band select pad (BS) selects
between GSM and DCS modes of operation. The transmit enable (TX_EN) pad controls receive or
transmit mode of the respective RF switch (TX = logic 1). Proper timing between transmit enable
(TX_EN) and Analog Power Control (VRAMP) allows for high isolation between the antenna and
TX_VCO while the VCO is being tuned prior to the transmit burst.
The SKY77518 is compatible with logic levels from 1.2V to VCC for BS and TX_EN pads, depending
on the level applied to the VLOGIC pad. This feature provids additional flexibility for the designer in
the selection of FEM interface control logic.
3. TECHNICAL BRIEF
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Figure 3.1 Functional Block Diagram
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TECHNICAL BRIEF
- 16 -
Table 3.1 Pad description
Table 3.2 Mode Control logic
Figure 3.2 Pad configuration (Top view) and case marking
Pin Mame Description
1 VCATT Battery input voltage
2 VLOGIC Control logic level selection/Standby control
3VRAMP Analog power control voltage input
4 TX_EN TX/RX select (mode control)
5BSBand Select (mode control)
6 DCS_RX DCS Receive RF Output (1805-1880 MHz)
7 GSM_RX GSM Receive RF Output (920-960 MHz)
8 GND RF and DC Ground
9 GND RF and DC Ground
10 GND RF and DC Ground
11 ANT RF_IN/RF_OUT to Antenna
12 GND RF and DC Ground
13 GND RF and DC Ground
14 GND RF and DC Ground
15 GND RF and DC Ground
16 GND RF and DC Ground
17 GSM_IN RF input 880-915 MHz
18 NC No Connect
19 DCS_IN RF input 1710-1785 MHz
20 GND RF and DC Ground
GMD PADS GROUND GRID Ground Pads, module underside
Mode V
LOGIC
Input Control Bits
TX_En BS
STANDBY 0 X1 X1
GSM_RX 1 0 0
DCS_RX 1 0 1
GSM_TX 1 1 0
DCS_TX 1 1 1
- 17 -
3. TECHNICAL BRIEF
3.2 Transceiver (AD6548, U503)
The AD6548 provides a highly integrated direct conversion radio solution that combines, on a single chip, all
radio and power management functions necessary to build the most com-pact GSM radio solution possible.
The only external components required for a complete radio design are the Rx SAWs, PA, Switchplexer and a
few passives enabling an extremely small cost effective GSM Radio solution. The AD6548 uses the industry
proven direct conversion receiver architecture of the OthelloTM family. For Quad band applications the front
end features four fully integrated programmable gain differential LNAs. The RF is then down converted by
quad-rature mixers and then fed to the baseband programmable-gain amplifiers and active filters for channel
selection. The Receiver output pins can be directly connected to the baseband analog processor. The Receive
path features automatic calibration and tracking to remove DC offsets. The transmitter features a translationloop
architecture for directly modulating baseband signals onto the integrated TX VCO. The translation-loop
modulator and TX VCO are extremely low noise removing the need for external SAW filters prior to the PA.
The AD6548 uses a single integrated LO VCO for both the receive and the transmit circuits. The synthesizer
lock times are optimized for GPRS applications up to and including class 12.
AD6548 incorporates a complete reference crystal calibration system. This allows the external VCTCXO to be
replaced with a low cost crystal. No other external components are required. The AD6548 uses the traditional
VCTCXO reference source. The AD6548 also contains on-chip low dropout voltage regulators (LDOs) to
deliver regulated supply voltages to the functions on chip, with a battery input voltage of between 2.9V and 5.5V.
Comprehensive power down options are included to minimize power consumption in normal use. A standard 3
wire serial interface is used to program the IC. The interface features low-voltage digital interface buffers
compatible with logic levels from 1.6V to 2.9V.
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Figure 3.3 AD6548 Block Diagram
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Notes:
1. Supply regulated by internal LDO3 and should not be connected to any other supply
2. Internally connected as Synth supply (Counters + SDM + Charge pump)
3. Supply regulated by internal LDO2 and should not be connected to any other supply
3. TECHNICAL BRIEF
- 18 -
Table 1 AD6548/9 Pin Descriptions
No Name Description No Name Description
1 VCC_FE Front end supply (IP) 17 VCC_REF Reference Oscillator Supply (IP)
2I I baseband input/output 18 VAFC/ AD6548 Crystal Freq control (IP)
N/C AD6549: Spare Pin
3IBI baseband input/output 19 REFIN Crystal Connection
4 VCC_BBI Baseband I, TX path supply (IP) 20 REFINB Crystal Connection
5 SDATA Serial port data 21 REF_OP Reference Frequency Output
6 SCLK Serial port clock 22 QB Q baseband input/output
7 SEN Serial port enable 23 Q Q baseband input/output
8 N/C Not connected 24 VCC_BBQ Baseband Q supply (IP)
9 VLDO3 TX LDO Output (1) 25 RX1900B PCS 1900 LNA input
10 TXOP_LO Transmit O/P (850/900MHz) 26 RX1900 PCS 1900 LNA input
11 TXOP_HI Transmit O/P (1800/1900MHz) 27 RX1800B DCS 1800 LNA input
12 VCC_TXVCO TX VCO supply (1) 28 RX1800 DCS 1800 LNA input
13 VDD Serial interface supply 29 RX900B E-GSM LNA input
14 VBAT Battery I/P for LDO reg’s 30 RX900 E-GSM LNA input
15 VLDO1 LDO regulator Output (2) 31 RX850B GSM 850 LNA input
16 VLDO2 LO VCO Supply (3) 32 RX850 GSM 850 LNA input
GOMPLIANT TO JEDEC STANDARDS MO-220-VHHD-2
- 19 -
3. TECHNICAL BRIEF
3.3 26 MHz Clock (Crystal, X501)
The 26 MHz clock (X501) consists of a XO (Crystal Oscillator) which oscillates at a frequency of 26 MHz. The
AD6548 requires only an external low cost crystal as the frequency reference. The circuitry to oscillate the crystal
and tune its frequency is fully integrated. The Oscillator is a balanced implementation requiring the crystal to be
connected across 2 pins. There is a programmable capacitor array included for coarse tuning of fixed offsets (e.g.
crystal manufacturing tolerance), and an integrated varactor for dynamic control. The oscillator is designed for use
with a 26MHz crystal. Dedicated control software ensures excellent frequency stability under all circumstances.
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Figure 3.4 CRYSTAL CIRCUIT DIAGRAM
X501
DSX321G-26M
EXXY0025201
12
34
26MHz
- 20 -
3. TECHNICAL BRIEF
3.4 MP3 IC (VC0978BRDA, U305)
- 1.8-3.3V power supply for digital I/O
- 1.8V power supply for digital core
- PLL input clock 3-36MHz
- PC interface : USB 2.0 device HS,FS, U-disk function, FAT16/32 file system
- storage interface : SD card(1bit/4bit), MMC card, T-flash, 8-bit NAND flash card
- I2S audio interface
- MP3 decoder
- ADPCM decoder
- MIDI 64poly
- Stereo DAC
- Stereo headset amplifiers
- Single speaker amplifiers
- Bypass function
LGE Internal Use Only
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Only for training and service purposes
Figure 3.5 VC0978 AUDIO PROCESSOR SYSTEM
- 21 -
3. TECHNICAL BRIEF
3.5 Baseband Processor (AD6724 , U104)
• AD6721 is an ADI designed processor
• AD6721 consists of
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
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FEATURES-DIGITAL
Complete Integrated Programmable Digital
Baseband Processor divided into three main
subsystems:
Control Processor Subsystem including:
• 32-bit MCU ARM7TDMI® Control Processor
• 39 MHz operation at 1.8V
• 1Mb of on-chip System SRAM Memory
DSP Subsystem including:
• 16-bit Fixed Point DSP Processor
• 91 MIPS[1] at 1.8V
• Data and Program SRAM
• Program Instruction Cache
• Full Rate, Enhanced Full Rate and Half Rate
• Speech Encoding/Decoding
• Capable of Supporting AMR & PDC Speech
Algorithms
Peripheral Functions
• Parallel and Serial Display Interface
• Keypad Interface
• Flash Memory Interface
• Page-Mode Flash Support
• 1.8V and 3.0V, 64 kbps SIM Interface
• Universal System Connector Interface
• Data Services Interface
• Battery Interface (e.g. Dallas)
Control of Radio Subsystem
Three independent programmable backlight
outputs
Real Time Clock with Alarm
Programmable Power Management and Clock
Management Supports 13 MHz and 26 MHz
Input Clocks
Slow Clocking Scheme for Low Idle Mode
Current Power Down modes
On-chip support for GSM Data Services up to
14.4Kbits/sec, GPRS, HSCSD and IrDA
JTAG Interface for Test and In-Circuit Emulation
FEATURES-ANALOG
Baseband Transmit Section
• GMSK Modulator
• I-channel & Q-channel Transmit DACs and
Filters
• Power Ramping DAC
Baseband Receive Section
• I-channel and Q-channel Receive ADCs and
Filters
Auxiliary Section
• Voltage Reference
• Automatic Frequency Control DAC
• Auxiliary ADC
• Light Controllers
Audio Section
• 8 kHz & 16 kHz Voiceband Codec
• 48 kHz Monophonic DAC
• Power Amplifiers
Poer Management Section
• Voltage Regulators
• Battery Charger
• Battery Protection
264-Ball package (17x17 grid), 12x12mm,
0.65mm ball pitch
APPLICATIONS
GSM850/GSM900/DCS1800/PCS1900 Wireless
Terminals GSM Phase 2 Compliant
- 22 -
3. TECHNICAL BRIEF
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Figure 3.5 SYSTEM INTERCONECTION OF AD6721 EXTERNAL INTERFACE
- 23 -
3. TECHNICAL BRIEF
3.5.1 Interconnection with external devices
A. RTC block interface
Countered by external X-TAL
The X-TAL oscillates 32.768KHz
B. LCD module interface
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Copyright © 2008 LG Electronics. Inc. All right reserved.
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Signals Description
nLCD_MAIN_CS MAIN LCD driver chip enable. MAIN LCD driver IC has own CS pin
LCD_SCLK This signal transfer serial clock to driver IC.
LCD_ID Select LCD module maker(2.8V : GP, 0V : SHARP)
nLCD_RESET This pin resets LCD module. This signal comes from AD6724 directly.
LCD_SDATA This signal transfer serial data to driver IC.
Table 3.5.B LCD CONTRON SIGNALS DISCRIPTION
0V
Voltage
Low
High
SHARP
LCD & CHARGE PUMP
2.8V
ID
LCD Connector
GP
MAKER
R216
47R223
75K
ECCH0004904
1u
C222
VBAT
4
5
IN
NC
12
U202
C1+
10
9
C1-
7
C2+
6
C2-
CP
8
1
D1
D2
2
3
D3
EN_SET
11
GND
AAT3157ITP-T1
EUSY0238702
R227 47
C221
ECZH0001215
1u
C232
27p
C231
DNI 100K
R230
R224 47
C220
ECCH0004904
1u
C223
27p
R226 47
43K
R219
C241
ECCH0004904
1u
1u
C234
EVLC5S0250
SEVY0005201
VA207
MIPG
C226
5
6
7
8
9
27p
14
15
1
10
11
12
13
2
3
4
ENQY0014701
IMSA-9671S-13Y912
J202
MIPD
27p
C235
2V8_VEXT
C238
DNIDNI
C237
C224
27p
27p
C236
C225
DNI
MLED
LCD_SCLK
nLCD_MAIN_CS
LCD_SDATA
LCD_BACKLIGHT_CTRL
MLED1
MLED2
MLED1
MLED2
LCD_ID
MLED
nLCD_RESET
- 24 -
3. TECHNICAL BRIEF
The backlight of LCD module is controlled by AD6724 via AAT3157.
The control signals related to Backlight LED are given bellow.
C. RF interface
The AD6724 control RF parts through PA_BAND, ANT_SW, PA_EN, S_EN, S_DATA, S_CLK
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Signals Description
MLED Current source for backlight LED
LCD_BACKLIGHT_CTRL Control LCD backlight level in 16 steps
MLED[1:2] This pins are returned-paths for backlight LED current source (MLED)
Table 3.5.B2 DESCRIPTION OF LCD BACKLIGHT LED CONTROL
Signals Description
PA_BAND (GPO 3) PAM Band Select
ANT_SW (GPO 9) Antenna switch Band Select
PA_EN (GPO11) PAM Enable/Disable
S_EN (GPO 19) PLL Enable/Disable
S_DATA (GPO 20) Serial Data to PLL
S_CLK (GPO 21) Clock to PLL
Table 3.5.C RF CONTROL SIGNALS DESCRIPTION
- 25 -
3. TECHNICAL BRIEF
D. SIM interface
The AD6724 provides SIM Interface Module. The AD6724 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_DATA, SIM_CLK,
nSIM_RST(GPIO_23) are required. The descriptions about the signals are given by bellow Table 35 in detail.
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Signals Description
SIM_DATA
This pin receives and sends data to SIM card.
This model can support 3.0 volt and 1.8 volt interface SIM card.
SIM_CLK Clock 3.25MHz frequency.
SIM_RST
Reset SIM block
(GPIO_23)
Table 3.5.D SIM CONTROL SIGNALS DESCRIPTION
Figure 3.5.D2 SIM Interface of AD6724
SIM SOCKET
DNI
C230
C2
2
3
C3
C5
4
5
C6
6
C7
GND1
7
8
GND2
9
GND3
GND4
10
J201
5000-6P-1.8SL
ENSY0018701
C1
1
C229
1000p
220n
C228
2V85_VSIM
C227
R218
DNI
15K
2V85_VSIM
DNI
R217
2V85_VSIM
SIM_DATA SIM_CLK
nSIM_RST
- 26 -
3. TECHNICAL BRIEF
E. LDO Block
There are8 LDOs in the AD6724.
- 1V8_VCORE : supplies Digital baseband Processor core and AD6724 digital core(1.8V, 80mA)
- 2V8_VMEM : supplies external memory and the interface to the external memory on the digital
baseband processor (2.8V, 150mA)
- 2V8_VEXT : supplies Radio digital interface and high voltage interface (2.8V, 200mA)
- 2V85_VSIM : supplies the SIM interface circuitry on the digital processor and SIM card
(2.85V,1.8V, 20mA)
- 1V8_VRTC : supplies the Real-Time Clock module (1.8 V, 20 µA)
- 2V5_VMIC : supplies the microphone interface circuitry (2.5 V, 2 mA)
- 2V75_VVCXO: supplies the voltage controlled crystal oscillator ( 2.75 V, 10 mA)
-2V75_VABB:analog basand relulator
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 27 -
3. TECHNICAL BRIEF
3.6 Keypad Switches and Scanning
The key switches are metal domes, which make contact between two concentric pads on the keypad
layer of the PCB when pressed. There are 20 switches connected in a matrix of 5rows by 4 columns,
as shown in Figure 3-8, except for the power switch (END), which is connected independently.
Functions, the row and column lines of the keypad are connected to ports of AD6724. The columns
are outputs, while the rows are inputs and have pull-up resistors built in. When a key is pressed, the
corresponding row and column are connected together, causing the row input to go low and generate
an interrupt. The columns/rows are then scanned by AD6724 to identify the pressed key.
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Figure 3.8 Keypad Switches and Scanning
9
2
END
7
MENU
KEY Matrix
*
3
5
LEFT
6
OK
1
#
DOWN
0
4
UP
SEL SEND
RIGHT
8
DNI
C429
0
C423
DNI
2
10K
R428
VBAT
C425
DNI
R431 680
SW412
SW404
C426
DNI
R432 680
DNI
C428
9
SW402
R426
680
SW408
3
5
DNI
C417
SW403
SW401
SW421
C420
DNI
R430 680
R427
680
680
R421
DNI
R422
680
C427
SW417
SW416
8
C430
4
DNI
6
SW420
7
1
SW419
R433 680
680
R425
680
R429
KEY_ROW0
KEY_COL0
KEY_COL1
KEY_COL2
KEY_COL3
KEY_ROW1
KEY_ROW2
KEY_ROW3
KEY_ROW4
nPOWER_KEY
- 28 -
3. TECHNICAL BRIEF
3.7 Microphone
The microphone is placed to the Front cover and soldered to main PCB. The audio signal is passed to
VINNORN and VINNORP pins of AD6724. The voltage supply VMIC is output from AD6721, and is a
biased voltage for the MIC_P. The MIC_P and MIC_N signals are then A/D converted by the voice
band ADC part of AD6724.
The digitized speech (PCM 8KHz ,16KHz) is then passed to the DSP section of AD6724 for
processing (coding, interleaving etc).
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Figure 3.9 Connection between Microphone
MAIN_MIC
2V5_VMIC
39p
C211
C202
10u
ECTH0001701
C205
27p
C207
39p
100ohm
R205
1
2
MIC201
OB4-15L42-C33L
SUMY0003802|mic_ob4_15l42_c33_bottomview
0.1u
C208
2.2K
R204
2.2K
R208
SEVY0004101
VA204
ICVN0505X150FR
C206
39p
C210
39p
SEVY0004101
ICVN0505X150FR
VA203
1K
R202
100ohm
R206
VINNORN
VINNORP
39p
C129
39p
C135
C130
39p
C132
39p
R123 0
39p
C131
C133
39p
R120 0
N17
M17
AIN1P
P17
AIN2N
R17
AIN2P
L17
AIN3N
AIN3P
L16
K17
AOUT1N
AOUT1P
H16
R15
AOUT2N1
P14
AOUT2N2
AOUT2P1
R16
P15
AOUT2P2
AOUT3N
J17
H17
AOUT3P
AIN1N
C134
39p
SPK_N
VINNORP
VINNORN
AUXIN
AUXIP
SPK_P
REC_P
REC_N
- 29 -
3. TECHNICAL BRIEF
3.8 Headset Interface
This phone has 4 electrodes such as GND, AUXIP, AUXIN, nJACK_DET.
Switching from Receiver to Headset Jack
If jack is inserted, JACK_DETECT goes from high to low.
Audio path is switched from receiver to earphone by JACK_DETECT interrupt.
Switching from Headset Jack to Receiver
If jack is removed, JACK_DETECT goes from low to high.
Audio path is switched from earphone to receiver by JACK_DETECT interrupt.
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Figure 3.11 HEADSET JACK INTERFACE
0.1u
C404
8
1A1B0
10
1B1
1
2A
52
2B0
3
2B1
4
GND
S1
7
S2
6
9
VCC
U402
FSA2268TUMX
EUSY0340301
ECTH0003401
C415 33u
10u
ECTZ0003701
C437
10uC436
ECTZ0003701
100K
R407
2V8_VEXT
33u
C416
ECTH0003401
HEADSET_RADIO_SEL
AUXOP_FM_R
AUXON_FM_L
AUXON
AUXOP
HP_R
HP_L
* U406 : NA
(1
for RADIO
I/O CONNECTOR
for RADIO
(KP110a/115a/110/115b)
100K
R419
DNI
C410
2V5_VMIC
FB404
C419
2V8_VEXT
DN
R420
100K
VUSBIN_IO
0.1uC412
1800FB403
2.2KR413
3
4
5
6
7
8
9
1
10
19
2
21
CN401
R438
0
R440
R439 0
0
1.5K
R412
NC2
9
OUT1
6
7
OUT2
_EN
10
3
_FLAG
EUSY0356701
NCP347MTAFTBG
U406
GND
2
11
GND_PAD
1
IN1
4
IN2
IN3
5
IN_PAD
12
8
NC1
FB402 1800
C418
10u
C411
C414
VBAT
ECCH0003002
VCHARGE_IO
39p
C409
0.1u
1800
FB401
USB-
USB+
AUXOP_FM_R
AUXON_FM_L
nJACK_DET
AUXIP
AUXIN
- 30 -
3. TECHNICAL BRIEF
3.9 Key Back-light Illumination
In key back-light illumination, there are 6 Blue LEDs in Main Board, which are driven by
nKEY_BACKLIGHT signal from AD6724.
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Figure 3.12 KEY BACK-LIGHT ILLUMINTION
(10V,K,X7R)
KEY BACKLIGHT
LEBB-S14E
LD204
LD205
LEBB-S14E
ECZH0003103
C240
0.1u
0.1u
ECZH0003103
C239
LD201
LEBB-S14E
EDLH0004501
R220 100ohm
100ohm
R225
LD206
LEBB-S14E
LEBB-S14E
LD203
VBAT
LD202
LEBB-S14E
VBAT
R221 100ohm
100ohm
R229
R228
100ohm
R222 100ohm
nKEY_BACKLIGHT
- 31 -
3. TECHNICAL BRIEF
3.10 LCD Back-light Illumination
LCD backlight LEDs is controlled by AD6724 via AAT3157, U202.
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Figure 3.13 MAIN LCD BACKLIGHT ILLUMINATION
Figure 3-5-3. Charge pump Output Current
LCD & CHARGE PUMP
R216
75K
ECCH0004904
1u
C222
VBAT
4
5
IN
NC
12
U202
C1+
10
9
C1-
7
C2+
6
C2-
CP
8
1
D1
D2
2
3
D3
EN_SET
11
GND
AAT3157ITP-T1
EUSY0238702
C221
ECZH0001215
1u
C220
ECCH0004904
1u
C223
27p
43K
R219
C241
ECCH0004904
1u
C226
27p
2V8_VEXT
C224
27p
C225
DNI
MLED
LCD_BACKLIGHT_CTRL
MLED1
MLED2
- 32 -
3. TECHNICAL BRIEF
3.11 VIBRATOR
The vibrator is placed in the rear cover and contacted to Main PCB. The vibrator is driven from
VIBRATOR (USC3) of AD6724
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
VIBRATOR
(50V,J,NP0)
(1608)
C217
27p
VBAT
1K
R214
100K
R215
VBAT
A1_C2
3
A2
2
1
C1
EDSY0014001
D201
KDS221E_RTK
CN203
LA4-436BK
SJMY0007904
1
2
R213
10
27p
C219
2
3
1
2SC5585
EQBN0007101
Q201
VIBRATOR
Figure 3.14 Vibrator
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TECHNICAL BRIEF
- 33 -
3.12 FM RADIO INTERFACE
The Si4702 patented digital low-IF architecture reduces external components and eliminates the need
for factory adjustments. The receive (RX) section integrates a low noise amplifier (LNA) supporting the
worldwide FM broadcast band (76 to 108MHz). An automatic gain control (AGC) circuit controls the
gain of the LNA to optimize sensitivity and rejection of strong interferers.
For two-wire operation, a transfer begins with the START condition. The control word is latched
internally on rising SCLK edges and is eight bits in length,comprised of a seven bit device address
equal to 0010000b and a read/write bit (write = 0 and read = 1).
The device acknowledges the address by setting SDIO low on the next falling SCLKedge. For write
operations, the device acknowledge Is followed by an eight bit data word latched internally on rising
edges of SCLK. The device always acknowledges the data by setting SDIO low on the next falling
SCLK edge.
An internal address counter automatically increments to allow continuous data byte writes, starting
with the upper byte of register 02h, followed by the lower byte of register 02h, and onward until the
lower byte of the last register is reached. The internal address counter then automatically wraps
around to the upper byte of register 00h and proceeds from there until continuous writes cease. Data
transfer ceases with the STOP command. After every STOP Command, The internal address counter
is reset.
For read operations, the device acknowledge is followed by an eight bit data word shifted out on falling
SCLK edges. An internal address counter automatically increments to allow continuous data byte
reads, starting with the upper byte of register 0Ah, followed by the lower byte of register 0Ah, and
onward until the lower byte of the last register is reached.
The internal address counter then automatically wraps around to the upper byte of register 00h and
proceeds from there until continuous reads cease.
After each byte of data is read, the controller IC should return an acknowledge if an additional byte of
data will be requested. Datatransfer ceases with the STOP command. After every STOP command,
the internal address counter is reset.
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TECHNICAL BRIEF
- 34 -
Figure 3.15 FM RADIO
FM RADIO
2V8_RADIO
4.7u
ECCH0006201
C402
C405 100p
22n
C407
R415
4.7K
R410
100K
3
CE GND
2
5
PGND
VDD
41
VOUT
TP403
U401
RP103K281D-TR-F
EUSY0355701
4.7K
R414
2V8_RADIO
C403
1u
0.1u
C408
TP402
C406
DNI
10
VIO
_RST
5
_SEN
6
12
GND2
15
GND3
19
GPIO1
GPIO2
18
17
GPIO3
LOUT
14
1
NC1
NC2
20
21
PGND
RCLK
9
RFGND
3
ROUT
13
7
SCLK8SDIO
VA
16
VD
11
EUSY0356501
SI4702-C19-GM
U403
FMIP
2
GND1
4
2V8_RADIO
VBAT
2V8_VEXT
R411
10K
R416 0
0R417
R418
47
ECCH0002101
C401
1 uF
R401
DNI
100K
R404
2V8_RADIO
2V8_RADIO
nFM_RESET
FM_LDO_EN
FM_32K
FM_SDATA
FM_SCLK
FM_HP_R
FM_HP_LFM_ANT
- 35 -
3. TECHNICAL BRIEF
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3.13 Battery Charging
The MP26021 is a linear, high-performance single cell Li-Ion battery charger.
By integrating high voltage input protection into the charger IC, the MP26021 can Tolerate an input
surge up to 28V
The device features constant current (CC) and constant voltage (CV) charging modes with
programmable charge currents(85mA to 1A), programmable battery full threshold, thermal protection,
battery temperature monitoring, reverse current blocking and trickle charge. The device also provides
AC adapter power good and Charge status indications to the system.
MP26021 is available in a 10-pin 3mm x 3mm QFN package.
Figure 3.15 CIRCUIT FOR BATTERY CHARGING
(10V,Z,Y5V)
* FL401 : NA
(50V,J,NP0)
(2012)
5
IN_PAD
12
8
NC1
NC2
9
OUT1
6
7
OUT2
_EN
10
3
_FLAG
EUSY0354101
NCP347MTAHTBG
U405
GND
2
11
GND_PAD
1
IN1
4
IN2
IN3
VCHARGE
C431
ECCH0003002
10u
VCHARGE_IO
OUT
ICVFP10181E301FR
FL401
GND1 GND2
IN
R434 0
56p
C432
R435 0
(10V,K,X5R, 1005)
(1%)
(10V,K,X5R, 1608)
CHARGING IC
(1%)
(5%)
R321
20K
620
R333
0.1u
2V8_VEXT
C356
ECCH0007802
4.7u
C342
DNI
R314
0R328
10
BATT
GND
6
IBF
8
1
IN
9
ISET
5
NTC
11
PGND
SS
7
3
_ACOK
_CHG
2
4
_EN
U304
MP26021
EUSY0352601
R320
100K
R315
100K
R326
470K
VBAT
3.9K
R317
C331
ECZH0001215
1u
TP304
100K
R329
4.7n
C357
nCHG_DET
nCHG_EN
VCHARGE
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
TEST POINT
- 36 -
4. TROUBLE SHOOTING
4. TROUBLE SHOOTING
4.1 RF Component
Figure 4.1
U502 Power Amp Module (SKY77518)
U503 (AD6548) RF Main Chip (Transceiver)
X501 Crystal, 26MHz Clock
FL501 SAW FILTER, B9310
FL501
U502
U503
X501
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 37 -
4.2 RX Trouble
START
Re-download SW or
Do calibration again
HP8960 : Test mode
109 CH, 7 level setting (TCH)
109CH, -60dBm setting (BCCH)
Spectrum analyzer setting
Oscilloscope setting
(1) Check
Crystal Circuit
(2) Check
Mobile SW &FEM
(3) Check
RX I/Q Signal
CHECKING FLOW
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 38 -
(1) Checking Crystal Circuit
TP1
26 MHzO.K?
No
No
Crystal Circuit is OK
See next Page to check
Mobile SW
ee next ge to check
Mobile SW
Yes
Change X501
1M
R509
C512
47p
3
GND
2
IN
4
OUT
VCC
5
U501
SN74AHC1GU04DCKR
2.2u
C513
2V75_VVCXO
R507 0
26M
VC_26M
TEST POINT CHECKING FLOW
CIRCUIT
WAVEFORM
Graph 4.2.1(a)
Graph 4.2.1(b)
TP1
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 39 -
(2) Checking RX I/Q
Redownload software and calibration again
Similar?
No
Replac
e U503
Yes
No
Check TP1, TP2.
Check if there is any
Major difference
Refer to graph 4.2.
3
TP2
TP1
U503
180
R514
C535
39p
39p
C515
VCC_FE
VCC_REF
17
VCC_TXVCO
12
13
VDD
15
VLDO1
VLDO2
16
9
VLDO3
RX1800B
RX1900
26
25
RX1900B
RX850
32
31
RX850B
RX900
30
29
RX900B
SCLK
6
5
SDATA7SEN
11
TXOP_HI
TXOP_LO
10
18
VAFC_NC
VBAT
14
VCC_BBI
4
24
VCC_BBQ
1
EUSY0280101
AD6548
U503
GND
33
I
2
3
IB
NC
8
Q
23
22QB20
REFIN
REFINB
19
REF_OP
21
RX1800
28
27
1u
C514 10p
IN
QN
QP
IP
TEST POINT
CHECKING FLOW
WAVEFORM
CIRCUIT
Graph 4.2.2
Figure 4.2.2
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 40 -
4.3 TX Trouble
START
Redownload SW or
Do calibration again
HP8960 : Test mode
109 CH, 7 level setting (TCH)
109CH, -60dBm setting (BCCH)
Spectrum analyzer setting
Oscilloscope setting
(1)Check
Crystal Circuit
(3)Check
PAM control
signal
(4)Check
TX I/Q Signal
(2)Check
Mobile SW
& FEM
Checking Flow
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 41 -
(1) Checking Crystal Circuit
TP1
26 MHzO.K?
No
No
Crystal Circuit is OK
See next Page to check
Mobile SW
See next Page to check
Mobile SW
Yes
Change X501
1M
R509
C512
47p
3
GND
2
IN
4
OUT
VCC
5
U501
SN74AHC1GU04DCKR
2.2u
C513
2V75_VVCXO
R507 0
26M
VC_26M
TEST POINT CHECKING FLOW
CIRCUIT
WAVEFORM
Graph 4.3.1(a)
Graph 4.3.1(b)
TP1
- 42 -
(2) Checking PAM Control Signal
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Similar?
Yes
No
Check TP1 and TP2
Any Maor Difference or not
¨
Similar?
Yes
No
Go to Next Step
Similar?
Yes
No
Re-download S/W
Check if there is
Any Major Difference or not
¨
Refer to Graph 4.3.3
TP1
(PA_EN)
TP2
(TX_RAMP)
U502
100ohmR502
C510
18p
R504 100ohm
27p
C504
PCS_IN
PGND
TX_EN
4
1
VBATT
VLOGIC
2
3
VRAMP
5
BSGND4
GND5
GND6
GND7
GND8
16
GND9
20
GSM_IN
17
NC
18
19
SKY77517
U502
C506
TLJR336M010R3500
33u
ECTH0005501
C509
33p
C508
0.01u
VBAT
R501 100ohm
R503 1K
C511
12p
39p
C502 C503
DNI
C505
27p
ANT_SW
PA_BAND
TX_RAMP
PA_EN
TEST POINT
CHECKING FLOW
WAVEFORM
CIRCUIT
Graph 4.3.2
Figure 4.3.2
- 43 -
(3) Checking TX I/Q
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Re-download the Software
And calibrate
Check if there is
Any
Major Difference
¨
Refer to Graph4.3.4
Similar?
Yes
No
Replac
e U503
TP2
TP1
U503
180
C535
39p
39p
C515
VCC_FE
VCC_REF
17
VCC_TXVCO
12
13
VDD
15
VLDO1
VLDO2
16
9
VLDO3
RX1800B
RX1900
26
25
RX1900B
RX850
32
31
RX850B
RX900
30
29
RX900B
SCLK
6
5
SDATA7SEN
11
TXOP_HI
TXOP_LO
10
18
VAFC_NC
VBAT
14
VCC_BBI
4
24
VCC_BBQ
1
EUSY0280101
AD6548
U503
GND
33
I
2
3
IB
NC
8
Q
23
22QB20
REFIN
REFINB
19
REF_OP
21
RX1800
28
27
u
IN
QN
QP
IP
TEST POINT
CHECKING FLOW
WAVEFORM
CIRCUIT
Graph 4.3.3
Figure 4.3.3
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 44 -
4.4 Power On Trouble
10V Over
1uC115
0.1u
C106
2V8_VMEM
2V75_VVCXO
C110
0.1u
C112 1u
1uC111
2V5_VMIC
2V8_VEXT
1uC117
22p
C105
1uC114
22p
C109
1V8_VCORE
VMEM
R13
VMIC
P16
N1
VPEG
VSIM
R14
F16
VVCXO
U12
VBAT8
VCORE
U11
M1
VCORE1A9VCORE2C1VCORE3
VCORE4
P1
VDDRTC
T9
C11
VEXT01
VABB
G17
E8
DATA2
DATA0
A11
D9
DATA1
1V8_VRTC
1uC116
1V8_VCORE
2V85_VSIM
VEXT
2.2u
C113
10K
R101
2V75_VABB
VBACKUP
DATA01
DATA02
DATA00
TEST POINT
CIRCUIT
Figure 4.4
END
10K
R428
VBAT
SW421
680
R429
nPOWER_KEY
TP6
TP7
TP8
TP1
TP5
TP3
TP4
TP2
TP1
TP7TP8
TP2
TP3
TP4
TP5
TP6
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 45 -
Checking Flow
START
Check Battery Voltage
> 3.35V
YES
Push power-on key
And check the level change
into low of POWERKEY
YES
Check the voltage of
The LDO outputs at U101
1V8_VCORE=1.8V VVCXO=2.75V
2V8_VMEM=2.8V 2V 85_VSIM= 2.85V
YES
Logic level at RPWRON of U101
= HIGH(above 1.2V)
YES
2V8_VEXT=2.8V 1V8_VRTC=1.8V
2V5_VMIC=2.5V
NO
NO
NO
NO
Charge or Change Battery
Check the contact of power key
Or dome-switch
Re-download software
Replace U101
Is the phone power on?
YES
The phone will
Properly operating.
NO
Replace U101 and Re-download software
Does it work properly?
NO
Replace the main board
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 46 -
4.5 Charging Trouble
(10V,K,X5R, 1005)
(1%)
(10V,K,X5R, 1608)
CHARGING IC
(1%)
(5%)
R321
20K
620
R333
0.1u
2V8_VEXT
C356
ECCH0007802
4.7u
C342
DNI
R314
0R328
10
BATT
GND
6
IBF
8
1
IN
9
ISET
5
NTC
11
PGND
SS
7
3
_ACOK
_CHG
2
4
_EN
U304
MP26021
EUSY0352601
R320
100K
R315
100K
R326
470K
VBAT
3.9K
R317
C331
ECZH0001215
1u
TP304
100K
R329
4.7n
C357
nCHG_DET
nCHG_EN
VCHARGE
TEST POINT
CIRCUIT
Figure 4.5
TP3
TP2
TP1
TP2 TP3
TP1
CN401
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 47 -
Checking Flow
START
Change the battery
Battery is charged?
NO
Is I/O Connector(CN401)
well-soldered ?
YES
Voltage at anode of
R326 = 4.8~6.4V ?
YES
Is Voltage across R315
0V?
YES
Is Voltage across R328
about 3V?
YES
YES
NO
NO
NO
NO
Charging is
properly operating
Resolder the CN401
(Pin 12,13 : VCHARGE)
The TA is out of order
Change the TA
Replace the U101
Replace the U101
Battery is charged?
YES
Charging is
properly operating
NO
Replace the main board
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 48 -
4.6 Vibrator Trouble
VIBRATOR
(50V,J,NP0)
(1608)
C217
27p
VBAT
1K
R214
100K
R215
VBAT
A1_C2
3
A2
2
1
C1
EDSY0014001
D201
KDS221E_RTK
CN203
LA4-436BK
SJMY0007904
1
2
R213
10
27p
C219
2
3
1
2SC5585
EQBN0007101
Q201
VIBRATOR
TEST POINT
CIRCUIT
Figure 4.6
TP1 TP2
TP3
TP3
TP2
TP1
- 49 -
4. TROUBLE SHOOTING
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
SETTING : Enter the engineering mode, and set vibrator on at vibration of BB test menu
Check Voltage Level of
R214/R215
OK
NG
OK
Replace the U101
Enter the engineering mode,
and set vibrator on.
R214=2.8V
R215=0.7V
Check Voltage Level of
Q101.PIN3 and R213
Q201.PIN3=0V
R213=0V
Replace the Q201
NG
Replace Vibrator
START
Checking Flow
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 50 -
4.7 LCD Trouble
TEST POINT
TP1
J202
TP2
TP3
TP4
TP5
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 51 -
LCD Trouble
0V
Voltage
Low
High
SHARP
LCD & CHARGE PUMP
2.8V
ID
LCD Connector
GP
MAKER
R216
47R223
75K
ECCH0004904
1u
C222
VBAT
4
5
IN
NC
12
U202
C1+
10
9
C1-
7
C2+
6
C2-
CP
8
1
D1
D2
2
3
D3
EN_SET
11
GND
AAT3157ITP-T1
EUSY0238702
R227 47
C221
ECZH0001215
1u
C232
27p
C231
DNI 100K
R230
R224 47
C220
ECCH0004904
1u
C223
27p
R226 47
43K
R219
C241
ECCH0004904
1u
1u
C234
EVLC5S0250
SEVY0005201
VA207
MIPG
C226
5
6
7
8
9
27p
14
15
1
10
11
12
13
2
3
4
ENQY0014701
IMSA-9671S-13Y912
J202
MIPD
27p
C235
2V8_VEXT
C238
DNIDNI
C237
C224
27p
27p
C236
C225
DNI
MLED
LCD_SCLK
nLCD_MAIN_CS
LCD_SDATA
LCD_BACKLIGHT_CTRL
MLED1
MLED2
MLED1
MLED2
LCD_ID
MLED
nLCD_RESET
CIRCUIT
TP4
TP3 TP1 TP5 TP2
- 52 -
4. TROUBLE SHOOTING
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
CHECKING FLOW
START
Backlight is OK?
Change PCB
YES
NG
Check Operation
After LCD changes
NO
Check Control
Signal and Power
Including soldering status
C234=2.8V
Control Signal=
Refer to next page
NG
Replace component
Or change PCB
Change PCB
OK
Check soldering
status of J202
OK
Change LCD
OK
NG
Replace J202
- 53 -
4. TROUBLE SHOOTING
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LCD Trouble
➜ LCD_SDATA pattern is out randomly when clock is fluctiatied.
, clock frequency is 13MHz and nLCD_RESET is High(2.8V).
TP4TP4
TP5TP5
WAVEFORM
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4.8 Speaker Trouble
TEST POINT
CIRCUIT
(17pi 3.4T speaker)
SPEAKER
39p
C203
39p
C204
0
R201
VA202
ESD9X5.0ST5G
EDTY0009101
INSTPAR
1
2
CN201
17-8T-01PP
SUSY0022601
39p
C201
R203
0
EDTY0009101
ESD9X5.0ST5G
VA201
INSTPAR
SPK_OUT_N
SPK_OUT_P
4. TROUBLE SHOOTING
- 54 -
Figure 4.8
TP1
TP2
TP1,TP2
U305
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 55 -
CHECKING FLOW
WAVEFORM
START
Check the operation of
speaker
Yes
Check the Audio signal
TP1,TP2
Speaker
Working we
ll!!
No
Change the speaker
No
Change the U305
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 56 -
4.9 SIM Card Interface Trouble
TEST POINT
CIRCUIT
SIM SOCKET
DNI
C230
C2
2
3
C3
C5
4
5
C6
6
C7
GND1
7
8
GND2
9
GND3
GND4
10
J201
5000-6P-1.8SL
ENSY0018701
C1
1
C229
1000p
220n
C228
2V85_VSIM
C227
R218
DNI
15K
2V85_VSIM
DNI
R217
2V85_VSIM
SIM_DATA SIM_CLK
nSIM_RST
Figure 4.9
TP1
J201TP1
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 57 -
CHECKING FLOW
START
Does the SIM card
support 3V or 1.8V ?
YES
Check sodering of
J201
YES
Is Voltage at C228 2.8V?
YES
Change the SIM Card
And try again.
Does it work
Properly?
NO
This phone supports 3V or 1.8V SIM card.
NO
NO
NO
Change the SIM Card.
Resoler J201
Change the U101
Redownload SW.
Does it work
Properly?
NO
Change the main board
YES
SIM card is properly working
YES
SIM card is properly working.
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 58 -
4.10 Earphone Trouble
TEST POINT
CIRCUIT
Figure 4.10
(16
for RADIO
for RADIO
100K
R419
DNI
C410
2V5_VMIC
FB404
C422
1 uF
C419
39p
2V8_VEXT
DNI_
R420
100K
C424
VUSBIN_IO
0.1uC412
1800FB403
2.2KR413
VA401
ULCE0505C015FR
SEVY0007301
22
3
4
5
6
7
8
9
1
10
11
12
13
14
15
16
17
18
19
2
20
21
HSEJ-18S
CN401
ENRY000
R440
VA404
R439 0
0
R423 DNI
1.5K
R412
OUT1
6
7
OUT2
2V8_VEXT
EUSY0356701
NCP347MTAFTBG
11
GND_PAD
4
IN2
IN3
5
IN_PAD
12
VA405
FB402 1800
100KR424
C418
39p
VA403
10u
C411
C414
VBAT
ECCH0003002
VCHARGE_IO
39p
2V8_VEXT
C409
0.1u
1800
FB401
capacitor
VA406
DNI
C435
SEVY0007301
ULCE0505C015FR
VA402
USB-
USB+
AUXOP_FM_R
AUXON_FM_L
nJACK_DET
nDSR_DET
UART_TX
UART_RX
AUXIP
AUXIN
RPWRON
0.1u
C404
8
1A1B0
10
1B1
1
2A
52
2B0
3
2B1
4
GND
S1
7
S2
6
9
VCC
U402
FSA2268TUMX
EUSY0340301
ECTH0003401
C415 33u
10u
ECTZ0003701
C437
10uC436
ECTZ0003701
100K
R407
2V8_VEXT
33u
C416
ECTH0003401
HEADSET_RADIO_SEL
AUXOP_FM_R
AUXON_FM_L
AUXON
AUXOP
HP_R
HP_L
TP2
TP3
TP4
TP1
TP1
TP4
CN401
TP2
TP3
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 59 -
CHECKING FLOW
START
Does the audio
profile of the phone
change to the
earphone mode?
Yes
Mic
Check voltage level
of R412
Check component status
around Vmic
No
Check the voltage Level
CN401.8 = Low?
No
Check U101
No
Re-solder or
replace the Component
No
Yes
Does waveform at
U101. AUXIN AUXIP
Re-solder CN401 or Change
another Ear- Mic set and Try again
Replace U101 or Change Board
Earphone
Acoustic
No
fluctuate?
Replace U101 or
Change the board
Check the signal Level
at AUXIN,AUXIP.
Is it about 1.2~1.5V DC
with a few tens mV AC?
Yes
Replace U101 or
Change another Ear-Mic set and Try again
No
Re-solder causal
component
(CN401)
Does waveform at
C418,C419
fluctuate?
Change another Ear-Mic set and Try again
No
Check U402
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 60 -
4.11 KEY backlight Trouble
TEST POINT
Figure 4.11
LEDs
TP2
TP1
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 61 -
CIRCUIT
CHECKING FLOW
TP2
TP1
KEY BACKLIGHT
nKEY_BACKLIGHT
LD201
LD202
LD203
LD204
LD205
LD206
START
EDLH0004501
LEBB-S14E
LEBB-S14E
LEBB-S14E
LEBB-S14E
LEBB-S14E
LEBB-S14E
R220 100ohm
R221 100ohm
R222 100ohm
R225
R228
R229
100ohm
100ohm
100ohm
C239
0.1u
ECZH0003103
(10V,K,X7R)
VBAT
VBAT
C240
0.1u
ECZH0003103
Check voltage C239,
C240 = 3.7V
YES
Check soldering of
R220~222,R225,R228,R229
YES
Check the soldering
Of LEDs
YES
Backlight will work properly.
NO
NO
NO
Check U101
Resolder the components
Resolder the components
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 62 -
4.12 Receiver Trouble
TEST POINT
CIRCUIT
(11x07x3T Receiver)
RECEIVER
C213
39p
VA206
ICVN0505X150FR
SEVY0004101
39p
C214
39p
C212
SEVY0004101
ICVN0505X150FR
VA205
L204 0
L203 0
1
2
SURY0013002
BWBR1107P-07A-P
CN202
REC_P
REC_N
39p
C129
39p
C135
C130
39p
C132
39p
R123 0
39p
C131
C133
39p
R120 0
P17
AIN2N
R17
AIN2P
L17
AIN3N
AIN3P
L16
K17
AOUT1N
AOUT1P
H16
R15
AOUT2N1
P14
AOUT2N2
AOUT2P1
R16
P15
AOUT2P2
AOUT3N
J17
H17
AOUT3P
C134
39p
SPK_N
AUXIN
AUXIP
SPK_P
REC_P
REC_N
TP1 TP2
Figure 4.12
TP2 TP1
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 63 -
CHECKING FLOW
SETTING : After initialize Agilent 8960, Test GSM900, DCS mode
Set the property of audio as PRBS or continuous wave. Set the receiving volume of mobile as Max.
Make a call
YES
Check L203/L204,
R120/R123,
C129/C212,
C134/C135/C213/C214
L203 & L204 bias will
Fluctiate signal above
1.2V
Check component
status
YES
Check L203 &
L204
OK
Check the Contact
Of Receiver
OK
Replace U101 or
Replace PCB
NG
NG
NG
Re-solder or
replace the Component
Re-solder or
replace the Component
Re-Assemble or Re-place
Receiver
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 64 -
4.13 Microphone Trouble
TEST POINT
CIRCUIT
MAIN_MIC
2V5_VMIC
39p
C211
C202
10u
ECTH0001701
C205
27p
C207
39p
100ohm
R205
1
2
MIC201
OB4-15L42-C33L
SUMY0003802|mic_ob4_15l42_c33_bottomview
0.1u
C208
2.2K
R204
2.2K
R208
SEVY0004101
VA204
ICVN0505X150FR
C206
39p
C210
39p
SEVY0004101
ICVN0505X150FR
VA203
1K
R202
100ohm
R206
VINNORN
VINNORP
Figure 4.13
TP1
TP4
TP2
TP3
TP1
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 65 -
CHECKING FLOW
SETTING : After initialize Agilent 8960, Test GSM900, DCS mode
START
Check the
Voltage VMIC 2.5V
YES
Check the signal
Level at each side
of MIC201.
Is it a few tens
mV AC?
YES
Check the soldering of
R205,R206,C206
YES
Microphone will work
properly.
NO
NO
NO
Change the U101
Change the microphone
Resolder component
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 66 -
4.14 RTC Trouble
TEST POINT
CIRCUIT
100ohm
R103
R102
10M
1000p
C118
X101
32.768KHz
12
3
4
MC-146_7pF
EXXY0004601
T10
OSCIN
OSCOUT
U10
NC3
E1
F1
NC4
NC1
C2
D8
NC2
KEYPADROW0
U4
KEYPADROW1
KEYPADROW2
R8
KEYPADROW3
R6
KEYPADROW4
R7
CLKIN
B1
KEY_ROW4
26M
KEY_ROW0
KEY_ROW1
KEY_ROW2
KEY_ROW3
TP1
Figure 4.14
TP1
X101
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
Is frequency
at R102 about 32.768KHz?
YE
S
Is voltage
at R102 about 400mV?
YES
Is RTC properly working?
YES
RTC will work properly
NO
NO
NO
Resolder the X101 or
change the X101
Resolder the X101 or
change the X101
Re-download software and try
again
- 68 -
4.15 FM Radio Trouble
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
TEST POINT
Figure 4.15
TP8,TP9
TP3
U403
TP4
TP5
TP6,TP7
U402
TP2
U401
TP1
- 69 -
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
FM RADIO
2V8_RADIO
4.7u
ECCH0006201
C402
C405 100p
22n
C407
R415
4.7K
R410
100K
3
CE GND
2
5
PGND
VDD
41
VOUT
TP403
U401
RP103K281D-TR-F
EUSY0355701
4.7K
R414
2V8_RADIO
C403
1u
0.1u
C408
TP402
C406
DNI
10
VIO
_RST
5
_SEN
6
12
GND2
15
GND3
19
GPIO1
GPIO2
18
17
GPIO3
LOUT
14
1
NC1
NC2
20
21
PGND
RCLK
9
RFGND
3
ROUT
13
7
SCLK8SDIO
VA
16
VD
11
EUSY0356501
SI4702-C19-GM
U403
FMIP
2
GND1
4
2V8_RADIO
VBAT
2V8_VEXT
R411
10K
R416 0
0R417
R418
47
ECCH0002101
C401
1 uF
R401
DNI
100K
R404
2V8_RADIO
2V8_RADIO
nFM_RESET
FM_LDO_EN
FM_32K
FM_SDATA
FM_SCLK
FM_HP_R
FM_HP_LFM_ANT
CIRCUIT DIAGRAM
0.1u
C404
8
1A1B0
10
1B1
1
2A
52
2B0
3
2B1
4
GND
S1
7
S2
6
9
VCC
U402
FSA2268TUMX
EUSY0340301
ECTH0003401
C415 33u
10u
ECTZ0003701
C437
10uC436
ECTZ0003701
100K
R407
2V8_VEXT
33u
C416
ECTH0003401
HEADSET_RADIO_SEL
AUXOP_FM_R
AUXON_FM_L
AUXON
AUXOP
HP_R
HP_L
for RADIO
100K
FB404
C419
39p
100K
1800FB403
VA401
3
4
5
6
7
8
9
1
10
11
2
R440
R439 0
0
FB402 1800
C418
39p
2V8_VEXT
VA402
USB-
USB+
AUXOP_FM_R
AUXON_FM_L
nJACK_DET
TP1
TP3
TP4
TP5
TP9
TP8
TP2
TP6
TP7
- 70 -
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Connector Headset and
Turn on Radio and
tuned channel
Check LDO
Power
R404 = High
C402=2.8V
Check
Control Signal
R416/R417/R418
Check I2C signal and 32K clock
Check
Audio Output
Of Transceiver
R406/R408
Check
Audio Output
Of Analog SW
C415/C416
Change PCB
Change U401
Change PCB
Change U403
Change U402
NO
NG
NG
NG
YES
OK
OK
OK
CHECKING FLOW
- 71 -
4.16 MP3 Trouble
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Figure 4.16
U302
TP2
TP1
TP3
TP4,TP5
U402
- 72 -
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
MP3 & T-Flash Interface
(4.7u)
*U303 : NA
(1%)
ECZH0001421
C352
2V8_DAC
2.2u
1
VDD
3
VOUT
C336 220n
U301
R1180D331B
EUSY0333001
6
CE_OR_NC
GND1
2
GND2
5
4
NC
ECCH0003002
C311
10u
C306
ECCH0002101
ECCH0002101
1 uF
3V3_VUSB
2V8_VEXT
C305
1 uF
B1
SVREF
B3
TEST
E4
M1
USB_PADM
L1
USB_PADP
USB_RPU
K1
USB_VDDA1
L2
K2
USB_VDDA2
USB_VDDD
M4
L5
USB_VDDL
L3
USB_VRES
USB_VSDL
L4
USB_VSSA1
M2
USB_VSSA2
M3
WRN
M10
NC1
NC2
A4
B4
NC3
E9
NC4
NC5
F2
F4
NC6
NC7
F9
M12
NC8
PRCORE_DVDD
J12
PRCORE_VDD
K12
PRCORE_VSS
L12
RDN
M11
RSTN
L6
SP_SO1
A2
A1
SP_SO2
B2
SP_VDDA2
SP_VSSA1
GPIO27_NF_IO7
A5
GPIO30_NF_CLE
GPIO31_NF_ALE
B5
A6
GPIO32_NF_CEN
B6
GPIO33_NF_REN
A7
GPIO34_NF_WEN
GPIO35_NF_WPN
B7
A8
GPIO36_NF_RB
GPIO37
B8
D5
HP_OUTL
D6
HP_OUTR
HP_VCM_HVDD
D9
HP_VDDA
D7
D8
HP_VSSA
D4
IFSEL
IRQ
J11
A3
F12
GPIO14_SD_DATA2
G11
G12
GPIO15_SD_DATA3
H11
GPIO16_SD_LOCK
GPIO17
H12
GPIO1_VDD_SD_VDD
D12
E12
GPIO1_VSS_SD_VSS
GPIO20_NF_IO0
A10
B10
GPIO21_NF_IO1
GPIO22_NF_IO2
A11
B11
GPIO23_NF_IO3
A9
GPIO23_VDD_NF_VDD
B9
GPIO23_VSS_NF_VSS
C11
GPIO24_NF_IO4
GPIO25_NF_IO5
A12
GPIO26_NF_IO6
B12
C12
DAC_VREFN
DAC_VREFP
H1
DAC_VSSA
J1
GPIO00
G4
H4
GPIO01
J4
GPIO02
GPIO03
J5
GPIO04
J6
J7
GPIO05
GPIO06
J8
GPIO07
J9
H9
GPIO0_VDD
G9
GPIO0_VSS
GPIO10_SD_CLK
D11
GPIO11_SD_CMD
E11
F11
GPIO12_SD_DATA0
GPIO13_SD_DATA1
D1
E1
ADCB_IP3
CLK
M5
K11
CSN
D0
M6
M7
D1
M8
D2
D3
M9
L7
D4
D5
L8
L9
D6
L10
D7
DAC_AOUTL
J2
H2
DAC_AOUTR
G2
DAC_VCOM
F1
DAC_VDDA
G1
U305 VC0978BRDA
EUSY0351501
L11
A0
ADCA_IP1
C1
C2
ADCA_IP2
ADCA_IP3
D2
E2
ADCB_IP1
ADCB_IP2
47K
R310
C347
ECCH0006201
4.7u
2V8_TF
2V8_TF
0.1u
C319
4.7u
ECCH0006201
C310
6.2K
R325
VUSBIN
10K
R331
TP301
C346
0.1u
C345
R313
10K
2V8_HP
39p
220nC341
C340
0.1u
100nH
L302
C327
0.1u
100nH
L301
100nH
L303
39p
C355
C348
0.1u
0.01u
C330
0.1u
C343
2V8_VC
0.1u
C318
0.1u
C351
C338 220n
1 uF
ECCH0002101
C303
2V8_VC
1V8_VC
A3V3_VUSB
10K
R332
220n
VUSBIN
39p
C332
39p
C350
C322
C309
ECCH0006201
4.7u
VBAT
C302
ECCH0002101
1 uF
1
VOUT
0.1u
C324
U303
RP103K281D-TR-F
EUSY0355701
3
CE GND
2
5
PGND
VDD
4
39p
C320
C339
39p
R304
DNI
220nC337
C304
ECCH0002101
1 uF
1.5K
R322
2V8_VC
R312
10K
A3V3_VUSB
2V8_HP
2V8_TF
C344
10u
C354
3V3_VUSB
ECCH0003002
1V8_VC
0.1u
C323
ECCH0003002
10u
R306
47K
0.1u
R308
C334
100K
0
2V8_VEXT
R305
DNI
DNI_CAP_2012
R350 0
C307
EN1
2
3
EN2
GND
54
NC1
6
NC2
9
PGND
1
VIN8VOUT1
VOUT2
7
2V8_VC
EUSY0319001
RT9011-MGPQW
U302
C329
ECCH0006201
4.7u
C325
39p
10K
R319
R311
47K
39p
C326
2V8_DAC
R318
10K
2V8_VC
C321
0.1u
TP303
3V3_VUSB
39p
C349
8pC358
8pC359
2V8_VC
C328
10u
ECCH0006501
220nC335
TP302
39p
C333
2V8_HP
VUSBIN
2V8_DAC
A3V3_VUSB
C353
ECZH0001421
2.2u
VBAT
L304
100nH
ECZH0003103
0.1u
C317
USB_DET
VSPK_OUT_N
VSPK_OUT_P
FM_HP_R
FM_HP_LSD_D2
SD_D3
USB+
USB-
HP_R
HEADSET_RADIO_SEL
SD_CLK
SD_CMD
SD_D0
SD_D1
DATA05
DATA06
DATA07
nWE
nVC_CS
ADD01
nRD
nFM_RESET
HP_L
FM_LDO_EN
VC_26M
VC_INT
nVC_RESET
DATA00
DATA01
DATA02
DATA03
DATA04
USB_LDO_EN
CIRCUIT DIAGRAM
1M
R509
C512
47p
3
GND
2IN4
OUT
VCC
5
U501
SN74AHC1GU04DCKR
2.2u
C513
2V75_VVCXO
R507 0
26M
VC_26M
FB404
C419
39p
1800FB403
VA401
3
4
5
6
7
8
9
10
11
R440
R439 0
0
FB402 1800
C418
39p
2V8_VEXT
VA402
USB-
USB+
AUXOP_FM_R
AUXON_FM_L
nJACK_DET
TP4
TP3
TP5
TP1
TP2
- 73 -
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Connector Headset and
Turn on Radio and
tuned channel
Check LDO
Power
C309 = 2.8V
C303 =1.8V
Check
VC_26M(R507)
Check
Audio Output
Of Analog SW
C415/C416
Change PCB
Change U302
Change U501
Change U402
NO
NG
NG
YES
OK
OK
CHECK FLOW
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
5. DOWNLOAD
5.1 Download
A. Download Setup
Figure 5.1 describes Download setup
Figure 5.1 Download Setup
5. DOWNLOAD
- 74 -
- 75 -
5. DOWNLOAD
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
B. Multi Download Procedure
1. Run GSM Multi Download program and select Setting
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 76 -
2. Select Configuration from the menu and you may see this window
3. Press key to select DLL file and press Open
5. DOWNLOAD
KP110.DLL
KP110.DLL
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 77 -
5. DOWNLOAD
4. Press key to select the mot files
5. Select AlchemyData.mot and press open
6. Repeat step 4-5 to select CodeData.mot
KP110.DLL
KP110_SW
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 78 -
7. Check if the ADI option is set to Hermes
8. Press OK to end Configuration
5. DOWNLOAD
KP110.DLL
KP110.SW
KP110.SW
Select Rate
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 79 -
5. DOWNLOAD
9. Press START to execute download
10. Once downloading is started, press STOP button to keep from re-downloading after downloading
is completed.
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 80 -
6. BLOCK DIAGRAM
6. BLOCK DIAGRAM
ABB+DBBABB+DBB
(AD6724)D6724)
Battery
Multimedia
IC
(MP3+Midi
+T- Flash)
Memory
(64M/32 M)
Analog
Switch
18 Pin
MMI
CON.
Transceiver
PAM
X-Ta l
(26MHz)
Antenn
Antenna
Ear- MIC
Data Cable
TA
1.5î CSTN
LCD
Charge
Pump
T-FlT-Fl ash ash
MeMemorymory
SpeSpeakeker
&
&
RecReceive
r
Vi
Vibratbrat oror
SIMSIM
RFRF
SAW
Filter
Battery
CON.
Charging
MI
MIC
KeKe
y
FM
Radio
Analog
Switch
USB
OVP
X-Ta l
(32kHz
)
Figure 6.1 LG-KP235 Block Diagram
- 81 -
PWR
URXD
UTXD
3G 2.5G
GND
RX
TX
VCHAR
ON_SW
VBAT
C
12 15
78
10
5
4
HSL
A
E
1
11
E
TRACE32(20 Pin)
TRACE32(14 Pin)
16
JTAG
9
1
LG(42)-A-5505-10:01
D
7
C
6
9
3
F
2
6
F
E
D
D
BB
10V Over
E
10V Over
11
2
4
C
13
F
C
A
148
D
LG Electronics Inc.
5
nRESET_TP
3
10
100ohm
R103
39p
1
2
C129
KDR331V
D101
3
USC0_TP
TMS
39p
C135
VCHARGE_TP
C107
0.1u
C130
39p
DNIR104
VBAT
CLKOUT_GATE
R105
10K
C132
39p
1uC115
R110
2.2K
2V8_VC
0.1u
C106
2V8_VMEM
R102
10M
1uC123
nUBS_TP
2V75_VVCXO
C140 39p
OJ102
AUXADC_TP
JTAGEN
C110
2V8_VMEM
R123
0.1u
0
R122 0
C137 39p
C104
22p
nLBS_TP
OJ101
C112 1u
TXON
1uC111
nRAM_CS1_TP
39p
C131
R116 68K
22p
C108
nRD_TP
2V85_VSIM
1u
VBAT
C125
nVC_CS_TP
2V5_VMIC
USC2_TP
2V8_VEXT
EDZTE615_1B
D110
NA
EDNY0013602
1000p
C118
C133
39p
1uC117
C124
4.7u
R120 0
0.068u
C128
C103
0.1u
USC6_TP
ADD101
22p
C105
TDI
VCHARGE
nABB_RESET
X101
32.768KHz
12
3
4
nROM_CS1_TP
MC-146_7pF
EXXY0004601
1uC114
R129
DNI
200R109
RXON
R113
DNI
OJ103
2V8_VEXT
VBAT
TDO
R107
22p
C109
100K
R130
120K
1V8_VCORE
CTS_TP
2V8_VEXT
1V8_VRTC
ASM_TP
VEXT1
VEXT2H1VEXT3
K1
VMEM
R13
VMEM1D1VMEM2
A10
A4
VMEM3
VMEMSEL
T12
VMEN4
A6
VMIC
P16
N1
VPEG
T13
VRTC
VSIM
R14
E6
VSIM_2
VSSRTC
T8
F16
VVCXO
VBAT2
B11
VBAT3
U12
VBAT8
B13
VBATSENSE
U13
VBAT_4_6
VBAT_5_7
T11
C12
VCHG
VCORE
U11
M1
VCORE1A9VCORE2C1VCORE3
VCORE4
P1
B10
VCXOEN
VDDRTC
T9
L1
VEXT0
C11
VEXT01
J1
M12
SGND1
U16
E4
SIMCLK
E2
SIMDATAOP
SPWR2
T15
TEMP2
A13
N15
TXON
USC0
M5
L3
USC1
M7
USC2
L2
USC3
USC4
M3
N6
USC5
USC6
N5
VABB
G17
VBAT1
E15
F15
D4
NRAMCS
B3
NRD
B5
A3
NRESET
NROMCS
D3
NWR
C4
T10
OSCIN
OSCOUT
U10
C16
PA
U14
PWRON
A17
QN
QP
B17
D17
REF
A15
REFBB
REFCHG
F17
R12
RESET
RXON
NC22
T14
NC25
G2
NC26
NC27
H2
F12
NC28
NC3
E1
F1
NC4
NC5
F3
NC6
G1
N3
NC7
P2
NC8
NC9
R1
C10
NDISPLAYCS
NGPCS0
C3
A2
NGPCS1
D5
NHWR
NLWR
J15
L14
MCLK
L12
MCLKEN
NC1
C2
NC10
T1
NC11
T2
U1
NC12
NC13
D2
C15
NC14
NC15
C14
NC17
P7
NC18
P10
NC19
R2
D8
NC2
R9
NC20
NC21
T3
T4
JTAGEN
U17
KEYON
T16
KEYOUT
T6
KEYPADCOL0
U5
KEYPADCOL1
KEYPADCOL2
U6
T7
KEYPADCOL3
KEYPADROW0
T5
U4
KEYPADROW1
KEYPADROW2
R8
KEYPADROW3
R6
KEYPADROW4
R7
LGND
K12
LGND1
K13
F14
LIGHT1
LIGHT2
H13
LIGHT3
GPO_1
J4
GPO_10
J2
GPO_11
K3
GPO_19
M6
GPO_20
K2
GPO_21
P8
GPO_22
P11
GPO_24
H3
GPO_3
M15
GPO_6
H6
GPO_8
GPO_9
J3
B16
IN
INT
H10
IP
A16
C13
ISENSE
F4
GPIO_1
P5
GPIO_14
U2
GPIO_15
GPIO_16
R4
GPIO_17
P6
F5
GPIO_18_TCK_DBB
F2
GPIO_19_TMS_DBB
GPIO_20_TDI_DBB
F6
G3
GPIO_21_TDO_DBB
E3
GPIO_23
GPIO_3
N2
GPIO_32
B2
H9
GPIO_4_INT
P9
GPIO_6
P3
GPIO_8
N12
GPO_0
N14
K6
GND3
K4
G6
GND4
GND51
D10
D15
GND52
G16
GND53
H15
GND54
J16
GND55
K16
GND56
GND61
A1
B4
GND62
GND63D7GND7M4GND8
N7
GND9
P4
GPIO_0
M2
N4
DATA14
DATA15
C5
E8
DATA2
DATA3
C9
A8
DATA4
DATA5
C8
DATA6
B8
DATA7
E7
DATA8
A7
C7
DATA9
U15
DBBON
DGND
R11
GATEDRIVE
A12
GND1
U9
U3
GND10U8GND11
GND2
CLKIN
CLKON
B9
M14
CLKOUT
CLKOUT_GATE
L13
CSDI_ABB
M16
CSDI_DBB
K15
CSDO_ABB
K14
CSDO_DBB
N16
CSFS_ABB
M11
CSFS_DBB
M10
DATA0
A11
D9
DATA1
DATA10
B7
DATA11
C6
B6
DATA12
DATA13
D6
A5
ASDO_ABB
H11
ASDO_DBB
J14
ASFS_ABB
ASFS_DBB
J13
L15
ASM
A14
AUXADC1
AUXADC2
B14
BATTYPE
B12
L10
BSDI_ABB
K10
BSDI_DBB
K11
BSDO_ABB
BSDO_DBB
L9
BSIFS_ABB
J11
BSIFS_DBB
K8
BSOFS_ABB
K9
BSOFS_DBB
J10
B1
N17
M17
AIN1P
P17
AIN2N
R17
AIN2P
L17
AIN3N
AIN3P
L16
K17
AOUT1N
AOUT1P
H16
R15
AOUT2N1
P14
AOUT2N2
AOUT2P1
R16
P15
AOUT2P2
AOUT3N
J17
H17
AOUT3P
ASDI_ABB
H12
ASDI_DBB
J7
J8
C17
L11
AGND02
M13
AGND03
AGND04
N9
N10
AGND05
N11
AGND06
AGND11
G15
H14
AGND12
AGND2
B15
F10
AGND31
G10
AGND32
AGND33
G12
G13
AGND34
AGND35
G14
N13
AGND36
AGND4
T17
AIN1N
E11
D16
ADD17
D14
ADD18
ADD19
D11
K5
ADD2
D12
ADD20
ADD21
D13
ADD22
E10
ADD3
H7
G4
ADD4
ADD5
G5
ADD6
G9
H8
ADD7
ADD8
G8
ADD9
F9
E17
AFCDAC
AGND01
U101
EUSY0354201
AD6724
P12
ABBRESET
J6
ADD1
F7
ADD10
ADD11
F8
E9
ADD12
E12
ADD13
ADD14
E16
F11
ADD15
ADD16
1V8_VRTC
C139
R106
DNI
39p
0R127
1uC116
URT101
CTS
12
DSR
10
GND
1
NC1
4
7
NC2
NC3
8
9
NC4
5
ON_SW
11
RTS
2
RX
3
TX
6
VBAT
C122
0R112
47n
USC1_TP
R119 0
DSR_TP
USC4_TP
1V8_VCORE
2V85_VSIM
C136
0.1u
0.1u
C126
39pC138
0R121
4.7u
C101
ECTH0001702
47n
C121
R125 0
VEXT
VC_INT_TP
ASFS
0R115
C134
39p
2.2u
RPWRON_TP
nROM_CS2_TP
C113
D102
KDS114E
EDSY0010501
nWR_TP
2V8_VEXT
10K
R101
VBATSENSE_TP
C127
OJ104
47p
CLKOUT
0.1u
C102
R108
100ohm
nKEY_BACKLIGHT
FM_32K
USB_LDO_EN
USC4
SPK_AMP_EN
SPK_N
2V75_VABB
AUXON
VC_INT
nDSR_DET
FM_SDATA
LCD_SDATA
nLCD_MAIN_CS
nLCD_RESET
LCD_SCLK
FM_SCLK
nRESET
AFC
TX_RAMP
VINNORP
VINNORN
AUXIN
AUXIP
AUXOP
USB_DET
nCHG_DET
VIBRATOR
BATT_TEMP
USC3
RPWRON
LCD_BACKLIGHT_CTRL
DBB_CLK_ON
VC_CLK_EN
CLKON
nVC_RESET
nCHG_EN
SPK_P
USC5
nROM_CS2
ADD21
ASM
PA_EN
UART_TX
USC6
KEY_ROW4
ADD22
VC_CLK_EN
nJACK_DET
LCD_ID
USC0
RPWRON
nDSR_DET
UART_TX
UART_RX
nVC_CS
DBB_CLK_ON
PA_BAND
nLBS
nRAM_CS1
nRD
nROM_CS1
nWE
VBACKUP
REC_P
REC_N
SIM_DATA
nSIM_RST
CLKON
nUBS
ADD08
ADD09
ADD10
ADD11
ADD12
ADD13
ADD14
ADD15
ADD16
ADD17
ADD18
ADD19
ADD20
ADD01
SIM_CLK
26M
KEY_COL1
KEY_COL2
KEY_COL3
KEY_ROW0
KEY_ROW1
KEY_ROW2
KEY_ROW3
DATA01
DATA02
ADD02
ADD03
ADD04
ADD05
ADD06
ADD07
DATA04
DATA05
DATA06
DATA07
DATA08
DATA09
UART_RX
ANT_SW
S_EN
S_CLK
S_DATA
KEY_COL0
IP
IN
QP
QN
KEY_ROW0
nPOWER_KEY
DATA00
DATA10
DATA11
DATA12
DATA13
DATA14
DATA15
DATA03
7. CIRCUIT DIAGRAM
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 82 -
C
1
VIBRATOR
SIM SOCKET
B
0V
MAIN_MIC
(10V,K,X7R)
Voltage
MEMORY
(11x07x3T Receiver)
A A
Low
4 10
D
2
High
52
(17pi 3.4T speaker)
C
SHARP
SPEAKER
0VSPK_OUT_P/N
1 SPK_AMP_OUT_P/N
89
B
3
LCD & CHARGE PUMP
(50V,J,NP0)
E
Speaker Phone
& MP3 Output
2.8V
ID
SPK_AMP_EN SPK_OUT_P/N
LCD Connector
LG Electronics Inc.
GP
3
MAKER
LGIC(42)-A-5505-10:01
BACK-UP BATTERY
(1608)
5 7
D
7
Mount on the opposit
6
6
RECEIVER
1
KEY BACKLIGHT
4
DNI
C230
LEBB-S14E
2V5_VMIC
LD204
39p
C211
C202
10u
ECTH0001701
39p
C203
R216
47R223
75K
470n
0.22u
C245
2V8_VEXT
C244
LD205
LEBB-S14E
ECCH0004904
1u
C215
1000p
C222
ECZH0003103
C240
VBAT
4
5
IN
NC
12
0.1u
U202
C1+
10
9
C1-
7
C2+
6
C2-
CP
8
1
D1
D2
2
3
D3
EN_SET
11
GND
C213
39p
AAT3157ITP-T1
EUSY0238702
C217
27p
C205
BA201
SBCL0001701
NBL414R-F9J
27p
2V8_VMEM
R227 47
C207
39p
C221
ECZH0001215
1u
C243 470n
C246
_R_CE1
C4
_R_LB
_R_UB
D4
C6
_WE
2.2u
B5
B6
RFU2
RFU3
G8
H9
RFU4
K6
RFU5
L6
RFU6
L5
RFU7
RY__BY
E5
R_CE2
D6
R_VCC
J6
VSS1
G3
VSS2
J9
H2
_F_CE1
_F_CE2
F9
_F_WP_ACC
C5
H3
_OE
J2
J4
DQ11
K5
J7
DQ12
DQ13
H7
DQ14
K8
H8
DQ15
K4
DQ2
H5
DQ3
DQ4
H6
DQ5
K7
DQ6
G7
J8
DQ7
DQ8
K3
DQ9
H4
D5
F_RST
F_VCC
J5
RFU1
E2
E6
A20
E9
A21
D2
A3
A4
F3
A5
E3
A6
D3
C3
A7
A8
C7
A9
E7
A1
DNU1
DNU2
A10
M1
DNU3
DNU4
M10
J3
DQ0
G4
DQ1
DQ10
G2
A0
F2
A1
A10
F7
C8
A11
A12
D8
E8
A13
A14
F8
D9
A15
G9
A16
F4
A17
E4
A18
D7
A19
A2
VBAT
U201
EUSY0323801
S71PL129NC0HFW
1K
R214
39p
C232
C204
100K
27p
R215
VA206
ICVN0505X150FR
SEVY0004101
C231
0.1u
ECZH0003103
C239
LD201
LEBB-S14E
DNI 100K
EDLH0004501
R230
R224 47
39p
C214
R212
0
VBAT
C216
0.1u
100ohm
0
R201
R205
R220
A1_C2
3
A2
2
1
C1
100ohm
EDSY0014001
D201
KDS221E_RTK
C220
ECCH0004904
1u
39p
C212
C223
C2
2
3
C3
C5
4
5
C6
6
C7
GND1
7
8
GND29GND3
GND4
10
27p
R226 47
J201
5000-6P-1.8SL
ENSY0018701
C1
1
100ohm
R225
SEVY0004101
ICVN0505X150FR
VA205
43K
R219
1
2
MIC201
OB4-15L42-C33L
SUMY0003802|mic_ob4_15l42_c33_bottomview
R209
100K
VA202
ESD9X5.0ST5G
EDTY0009101
INSTPAR
C242
27p
C241
ECCH0004904
1u
1u
C234
0.1u
C208
1u
C218
LD206
LEBB-S14E
ECCH0004904
CN203
LA4-436BK
SJMY0007904
1
2
L204 0
LEBB-S14E
EVLC5S0250
SEVY0005201
VA207
LD203
R213
10
27p
C219
MIPG
L203
C229
0
2.2K
1000p
R204
220n
C228C226
5
6
7
8
9
27p
14
15
1
10
11
12
13
2
3
4
ENQY0014701
IMSA-9671S-13Y912
J202
2
3
1
2.2K
R208
2SC5585
EQBN0007101
Q201
100K
R210
RY_BY_TP
VBAT
0.1u
C209
MIPD
1
2
LD202
LEBB-S14E
SEVY0004101
VA204
VBAT
CN201
17-8T-01PP
SUSY0022601
2V85_VSIM
ICVN0505X150FR
39p
27p
C201
C235
2V8_VEXT
R203
0
C206
39p
C210
39p
C227
R218
DNI
VBAT
15K
2V8_VMEM
C238
DNI
R221
DNI
100ohm
2V85_VSIM
C237
SEVY0004101
C224
27p
ICVN0505X150FR
VA203
EDTY0009101
ESD9X5.0ST5G
VA201
INSTPAR
1K
R202
100ohm
R229
100ohm
27p
C236
R206
0.1u
C247
8
1A1B0
10
1B1
1
2A522B0
3
2B1
4
GND
S1
7
S2
6
9
VCC
DNI
R217
U204
FSA2268TUMX
EUSY0340301
A3
B3
VO+
A1
VO-_SHUTDOWN
B1
U203
TPA6205A1ZQVR
EUSY0349001
C1
BYPASSB2GND
IN+
C2
IN-
C3
VDD
R235
100K
R228
100ohm
2V85_VSIM
R222 100ohm
R207
22p
R232
120K
R236 120K
R234 10K
R233 10K
C225
1
2
DNI
SPK_AMP_EN
SPK_N
SPK_P
SPK_AMP_OUT_N
SPK_AMP_OUT_P
SURY0013002
BWBR1107P-07A-P
CN202
VBACKUP
SPK_OUT_P
SPK_OUT_N
SPK_AMP_OUT_P
VSPK_OUT_P
VSPK_OUT_N
SPK_AMP_OUT_N
SPK_AMP_EN
MLED
DATA00
DATA01
DATA10
DATA11
DATA12
DATA13
DATA14
DATA15
DATA02
DATA03
DATA04
DATA05
DATA06
DATA07
DATA08
DATA09ADD10
nRESET
SIM_DATA SIM_CLK
nSIM_RST
nROM_CS1
nROM_CS2
ADD15
ADD16
ADD17
ADD18
ADD19
ADD20
ADD03
ADD21
ADD22
ADD04
ADD05
ADD06
ADD07
ADD08
ADD09
LCD_SCLK
nLCD_MAIN_CS
LCD_SDATA
ADD01
ADD02
ADD11
ADD12
ADD13
ADD14
LCD_BACKLIGHT_CTRL
MLED1
MLED2
MLED1
MLED2
LCD_ID
MLED
nLCD_RESET
SPK_OUT_N
SPK_OUT_P
VINNORN
VINNORP
nKEY_BACKLIGHT
VIBRATOR
REC_P
REC_N
nRAM_CS1
nLBS
nUBS
nRD
nWE
7. CIRCUIT DIAGRAM
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 83 -
E
3
LGIC(42)-A-5505-10:01
D
C
10V, X5R
2
MP3 & T-Flash Interface
(10V,K,X5R, 1005)
BAT Connector
T-Flash Connector
C
(4.7u)
1 6
(1%)
5
*U303 : NA
6
7
(10V,K,X5R, 1608)
A
5
A
B
4
CHARGING IC
B
4
1
10V Over
(1%)
7
D
(1%)
LG Electronics Inc.
92 10
ECZH0001421
C352
83
(5%)
2V8_DAC
2.2u
1
VDD
3
VOUT
C336 220n
U301
R1180D331B
EUSY0333001
6
CE_OR_NC
GND1
2
GND2
5
4
NC
ECCH0003002
C311
10u
C306
ECCH0002101
ECCH0002101
1 uF
3V3_VUSB
2V8_VEXT
C305
1 uF
B1
SVREF
B3
TEST
E4
M1
USB_PADM
L1
USB_PADP
USB_RPU
K1
USB_VDDA1
L2
K2
USB_VDDA2
USB_VDDD
M4
L5
USB_VDDL
L3
USB_VRES
USB_VSDL
L4
USB_VSSA1
M2
USB_VSSA2
M3
WRN
M10
NC1
NC2
A4
B4
NC3
E9
NC4
NC5
F2
F4
NC6
NC7
F9
M12
NC8
PRCORE_DVDD
J12
PRCORE_VDD
K12
PRCORE_VSS
L12
RDN
M11
RSTN
L6
SP_SO1
A2
A1
SP_SO2
B2
SP_VDDA2
SP_VSSA1
GPIO27_NF_IO7
A5
GPIO30_NF_CLE
GPIO31_NF_ALE
B5
A6
GPIO32_NF_CEN
B6
GPIO33_NF_REN
A7
GPIO34_NF_WEN
GPIO35_NF_WPN
B7
A8
GPIO36_NF_RB
GPIO37
B8
D5
HP_OUTL
D6
HP_OUTR
HP_VCM_HVDD
D9
HP_VDDA
D7
D8
HP_VSSA
D4
IFSEL
IRQ
J11
A3
F12
GPIO14_SD_DATA2
G11
G12
GPIO15_SD_DATA3
H11
GPIO16_SD_LOCK
GPIO17
H12
GPIO1_VDD_SD_VDD
D12
E12
GPIO1_VSS_SD_VSS
GPIO20_NF_IO0
A10
B10
GPIO21_NF_IO1
GPIO22_NF_IO2
A11
B11
GPIO23_NF_IO3
A9
GPIO23_VDD_NF_VDD
B9
GPIO23_VSS_NF_VSS
C11
GPIO24_NF_IO4
GPIO25_NF_IO5
A12
GPIO26_NF_IO6
B12
C12
DAC_VREFN
DAC_VREFP
H1
DAC_VSSA
J1
GPIO00
G4
H4
GPIO01
J4
GPIO02
GPIO03
J5
GPIO04
J6
J7
GPIO05
GPIO06
J8
GPIO07
J9
H9
GPIO0_VDD
G9
GPIO0_VSS
GPIO10_SD_CLK
D11
GPIO11_SD_CMD
E11
F11
GPIO12_SD_DATA0
GPIO13_SD_DATA1
D1
E1
ADCB_IP3
CLK
M5
K11
CSN
D0
M6
M7
D1
M8
D2
D3
M9
L7
D4
D5
L8
L9
D6
L10
D7
DAC_AOUTL
J2
H2
DAC_AOUTR
G2
DAC_VCOM
F1
DAC_VDDA
G1
U305 VC0978BRDA
EUSY0351501
L11
A0
ADCA_IP1
C1
C2
ADCA_IP2
ADCA_IP3
D2
E2
ADCB_IP1
ADCB_IP2
47K
R310
C347
ECCH0006201
4.7u
2V8_TF
2V8_TF
0.1u
C319
4.7u
ECCH0006201
C310
ECCH0000117
C313
R321
20K
27p
6.2K
R325
VUSBIN
10K
R331
TP301
C346
0.1u
C345
R313
10K
2V8_HP
39p
220nC341
C340
0.1u 620
R333
100nH
L302
C327
0.1u
C315
ECZH0001215
1u
100nH
L301
100nH
L303
39p
C355
C348
0.1u
0.01u
C330
0.1u
C343
2V8_VC
0.1u
C318
0.1u
C351
C338 220n
1 uF
ECCH0002101
C303
1
2
3
2V8_TF
0.1u
2V8_VC
ENZY0019901
HSBC-3P-58-A1
CN301
1V8_VC
2V8_VEXT
C356
A3V3_VUSB
10K
R332
220n
VUSBIN
39p
C332
39p
C350
C322
ECCH0007802
4.7u
C342
C309
ECCH0006201
4.7u
C316
1u
VBAT
VBAT
C302
ECCH0002101
1 uF
1
VOUT
0.1u
C324
U303
RP103K281D-TR-F
EUSY0355701
3
CE GND
2
5
PGND
VDD
4
39p
DNI
R314
C320
C339
0R328
39p
10K
R334 R335
10K
R304
DNI
220nC337
DNI
R307
C304
ECCH0002101
1 uF
1.5K
GND1_TP
R322
2V8_VC
VBAT_TP
R312
10K
A3V3_VUSB
2V8_HP
2V8_TF
C344
10u
C354
3V3_VUSB
ECCH0003002
1V8_VC
0.1u
R302
10K
10
BATT
GND
6
IBF
8
1
IN
9
ISET
5
NTC
11
PGND
SS
7
3
_ACOK
_CHG
2
4
_EN
U304
MP26021
EUSY0352601
C323
ECCH0003002
10u
DNI
R306
47K
VA301
0.1u
R308
C334
100K
R320
100K
0
2V8_VEXT
GND3_TP
R305
DNI
DNI_CAP_2012
R350 0
C307
EN1
2
3
EN2
GND
54
NC1
6
NC2
9
PGND
1
VIN8VOUT1
VOUT2
7
2V8_VC
GND2_TP
EUSY0319001
RT9011-MGPQW
U302
C329
ECCH0006201
4.7u
C325
39p
10K
R319
R311
47K
R315
100K
R326
470K
39p
C326
1 uF
2V8_DAC
VBAT
C301
R309 0
10K
R301
R318
10K
DNI
DNI_CAP_1005
C314
2V8_VC
C321
0.1u
3.9K
R317
TP303
C331
ECZH0001215
1u
3V3_VUSB
TP304
39p
C349
8pC358
8pC359
2V8_VC
C328
10u
ECCH0006501
220nC335
TP302
39p
C333
100K
R329
2V8_HP
VUSBIN
2V8_DAC
A3V3_VUSB
10K
R303
C353
ECZH0001421
2.2u
VBAT
DNI
CLK
3
CMD
7
DAT0
DAT18DAT2
1
DAT3
2
GND1
9
GND2
10
GND3
11
12
GND4
4
VDD
6
VSS
C308
4.7n
C357
ENSY0017701
SCHB1A0202
J301
5
L304
100nH
ECZH0003103
0.1u
C317
nCHG_DET
nCHG_EN
USB_DET
SD_CMD
SD_D3
SD_D1
VCHARGE
VSPK_OUT_N
VSPK_OUT_P
FM_HP_R
FM_HP_LSD_D2
SD_D3
USB+
USB-
HP_R
HEADSET_RADIO_SEL
SD_CLK
SD_CMD
SD_D0
SD_D1
DATA05
DATA06
DATA07
nWE
nVC_CS
ADD01
nRD
nFM_RESET
HP_L
FM_LDO_EN
BATT_TEMP
VC_26M
VC_INT
nVC_RESET
DATA00
DATA01
DATA02
DATA03
DATA04
SD_D2
SD_D0
SD_CLK
USB_LDO_EN
7. CIRCUIT DIAGRAM
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 84 -
9
5
8
2
* U406 : NA
(1608)
(10V,Z,Y5V)
END
7
MENU
6
6 : USB+
FM RADIO
LG Electronics Inc.
KEY Matrix
5
*
C
for RADIO
I/O CONNECTOR
2
1
4
3
9
LGIC(42)-A-5505-10:01
8 : JACK_DET
5
for RADIO
6
11 : R/ON
7 : USB-
D
C
LEFT
6
2 : AUDIO
A
* FL401 : NA
A
B
HEADSET_RADIO_SEL AUX_OP_FM_R/L
0AUX_OP/N
1HP_R/L
OK
12,13 : CHARGE
4
9,10 : BATT
3
1
for RADIO
#
DOWN
18 : GND
17 : USC1(RX_DATA)
1 : FM_ANT
0
D
1608
4
1
UP
SEL
(50V,J,NP0)
7
SEND
E
(2012)
16 : USC2(TX_DATA)
2
107
15 : VUSB
14 : DSR
RIGHT
3
4 : EAR_L
(KP110a/115a/110/115b)
8
5 : EAR_R
3 :
100K
R419
2V8_RADIO
DNI
DNI
C410
2V5_VMIC
C429
0
4.7u
FB404
ECCH0006201
C402
C422
C405 100p
1 uF
C423
5
IN_PAD
12
8
NC1
NC2
9
OUT1
6
7
OUT2
_EN
10
3
_FLAG
DNI
EUSY0354101
NCP347MTAHTBG
U405
GND
2
11
GND_PAD
1
IN1
4
IN2
IN3
C419
VCHARGE
22n
39p
VUSBIN
C407
2
10K
R415
4.7K
2V8_VEXT
R428
C431
ECCH0003002
10u
VBAT
DNI_CAP_1608
C434
DNI
VCHARGE_IO
R420
100K
C425
DNI
R431 680
SW412
R410
100K
3
CE GND
2
5
PGND
VDD
41
VOUT
TP403
SW404
U401
RP103K281D-TR-F
EUSY0355701
C424
VUSBIN_IO
39p
4.7K
R414
C426
DNI
2V8_RADIO
0.1uC412
R432 680
DNI
C428
C403
1u
1800FB403
2.2KR413
9
SW402
R426
680
VUSBIN_IO
SW408
3
0.1u
C404
8
1A1B0
10
1B1
1
2A
52
2B0
3
2B1
4
GND
S1
7
S2
6
9
VCC
5
U402
FSA2268TUMX
EUSY0340301
0.1u
C408
DNI
C417
SW403
ECTH0003401
C415
TP402
33u
C406
DNI
VA401
ULCE0505C015FR
SEVY0007301
22
3
4
5
6
7
8
9
1
10
11
12
13
14
15
16
17
18
19
2
20
21
HSEJ-18S04-25R
CN401
ENRY0006401
OUT
SW401
SW421
10
VIO
_RST
5
_SEN
6
ICVFP10181E301FR
FL401
GND1 GND2
IN
12
GND2
15
GND3
19
GPIO1
GPIO2
18
17
GPIO3
LOUT
14
1
NC1
NC2
20
21
PGND
RCLK
9
RFGND
3
ROUT
13
7
SCLK8SDIO
VA
16
VD
11
EUSY0356501
SI4702-C19-GM
U403
FMIP
2
GND1
4
C420
DNI
R438
0
2V8_RADIO
R430 680
10u
ECTZ0003701
C437
10u
VBAT
C436
ECTZ0003701
R440
EVLC14S02050
VA404
R439 0
0
R423 DNI
2V8_VEXT
100K
R407
R427
680
680
R421
DNI
R422
680
C427
SW417
1.5K
R412
C413
NC2
9
OUT1
6
7
OUT2
_EN
10
3
_FLAG
2V8_VEXT
2V8_VEXT
10p
EUSY0356701
NCP347MTAFTBG
U406
GND
2
11
GND_PAD
1
IN1
4
IN2
IN3
5
IN_PAD
12
8
NC1
R411
10K
VA405
EVLC14S02050
FB402 1800
R434 0
100KR424
C418
39p
EVLC14S02050
VA403
SW416
R416 0
8
10u
C411
C414
VBAT
ECCH0003002
VCHARGE_IO
39p
C430
2V8_VEXT
4
C409
DNI
0.1u
1800
FB401
270nH
L401
33u
6
C416
ECTH0003401
0R417
SW420
7
R418
47
ECCH0002101
C401
1 uF
56p
1
C432
SW419
R433 680
capacitor
VA406
DNI
1 uF
C435
R401
DNI
680
R425
100K
R404
2V8_RADIO
R435 0
680
SEVY0007301
ULCE0505C015FR
VA402
R429
USB-
USB+
AUXOP_FM_R
AUXON_FM_L
HEADSET_RADIO_SEL
AUXOP_FM_R
AUXON_FM_L
AUXON
AUXOP
2V8_RADIO
nJACK_DET
nFM_RESET
KEY_ROW0
nDSR_DET
UART_TX
UART_RX
KEY_COL0
KEY_COL1
KEY_COL2
KEY_COL3
KEY_ROW1
KEY_ROW2
KEY_ROW3
KEY_ROW4
nPOWER_KEY
FM_LDO_EN
AUXIP
AUXIN
HP_R
HP_L
FM_ANT
RPWRON
FM_32K
FM_SDATA
FM_SCLK
FM_HP_R
FM_HP_LFM_ANT
7. CIRCUIT DIAGRAM
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 85 -
6
U502
L
FL501
LG Electronics Inc.
A
6.8nH
102
1
L
PA_BAND
SMRH0004501
B
SFSB0001301 SFSB0001401
GSM850/PCS1900
SMRH0004701
2
1
4.7nH
4
5dB
7
H
9
LGIC(42)-A-5505-10:01
4dB
C
B
TX_EN
3
PCS1900 TX
5
GSM850 RX
3
A
D
H
4 8
MODE
E
L508
H
SHIELD CAN FRAME
D
C
H
ANT_SW
GSM850 TX
5
H
H
L
GSM900/DCS1800
76
HH
L
R513
30
PCS1900 RX
SW501
KMS-512_P
ENWY0006001
ANT
G1
G2
RF
L508
6.8nH
C536
27p
6.8pC533
100ohmR502
0
R516
TP502
22p
C516
C522
0.1u
1M
R509
L505
180
R514
15nH
ELCH0001401
C512
47p
1K
R515
0.1u
C534
TP501
C510
18p
3p
R504 100ohm
C524
6.8pC526
3
GND
2IN4
OUT
VCC
5
24
R508
U501
SN74AHC1GU04DCKR
27p
C504
C535
39p
C528
0.1u
C537
0.1u
C529
39p
27p
PCS_IN
PCS_RX
6
21
PGND
TX_EN
4
1
VBATT
VLOGIC
2
3
VRAMP
C515
11
ANT
5
BS
GND1
8
9
GND2
10
GND3
GND4
12
13
GND5
GND6
14
15
GND7
GND8
16
GND9
20
GSM_IN
17
7
GSM_RX
NC
18
19
C527
SMRH0004701
SKY77517
U502
0.1u
VCC_FE
VCC_REF
17
VCC_TXVCO
12
13
VDD
15
VLDO1
VLDO2
16
9
VLDO3
VBAT
TP503
RX1800B
RX1900
26
25
RX1900B
RX850
32
31
RX850B
RX900
30
29
RX900B
SCLK
6
5
SDATA7SEN
11
TXOP_HI
TXOP_LO
10
18
VAFC_NC
VBAT
14
VCC_BBI
4
24
VCC_BBQ
1
EUSY0280101
AD6548
U503
GND
33
I
2
3
IB
NC
8
Q
23
22QB20
REFIN
REFINB
19
REF_OP
21
RX1800
28
27
0.1u
C523
C506
TLJR336M010R3500
33u
ECTH0005501
C509
33p
C507 33p
2.2u
C513
C530
27p
X501
DSX321G-26M
EXXY0025201
12
34
0.1u
C518
26MHz
C508
R512
180
0.01u
0
R506
1000p
C517
VBAT
2V75_VVCXO
C514 10p
R501 100ohm
C532
220n
C531
0.1u
4.7nH
L501
27p
C520
2V75_VVCXO
R503 1K
0
R517
DNI
R518
39p
C521
4.7p
C539
C511
1
I2
4
9
O1_1
O1_2
8
O2_1
7
6
O2_2
12p
SFSB0001301
B9310
FL501
2G13G25G310
G4
I1
220
R510 R511
220
2V8_VMEM
6
7
8
9
11
12
13
14
15
16
17
18
19
2
20
21
22
23
3
4
5
SC501
MFEA0017701
1
10
1.5nH
L502
39p
C502 C503
DNI
R507 0
L507
NA
C505
27p
C538
27p
5.1nH
L504
ELCH0009110
3p
18nH
L506
C525
ANT_SW
26M
VC_26M
AFC
PA_BAND
TX_RAMP
PA_EN
S_EN
S_CLK
IN
QN
QP
IP
S_DATA
7. CIRCUIT DIAGRAM
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 86 -
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 87 -
8. BGA IC Pin Check
8. BGA IC Pin Check
: Not us ed
U101 : AD6724
- 88 -
8. BGA IC Pin Check
U201 : S71PL129NC0HFW
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
1 2 3 4 5 6 7 8 9 10
A
B
C
D
E
F
G
H
J
K
L
M
: Not us ed
- 89 -
8. BGA IC Pin Check
U305 : VC0978BRDA
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
A
B
C
D
E
F
G
1 2 3 4 5 6 7 8 9 10 11 12
H
J
K
L
M
: Not us ed
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 90 -
- 91 -
9. PCB LAYOUT
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 92 -
9. PCB LAYOUT
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
BA201
BACKUP BATT.
NO RTC OPERATE
J202
LCD CON.
NO DISPLAY
J202
LCD CON.
NO DISPLAY
U201
MEMORY
NO OPERATE SW
J201
SIM SOCKET
NO SIM RECOG.
U202
CHARGE PUMP
NO DISPLAY
U502
PAM
CAN’T MAKE A CALL
FL501
SAW FILTER
CAN’T MAKE A CALL
U405
OVP IC
NO CHARGE
X501
X’TAL
CHECK THE FREQ’ 26M
U101
BASEBAND
CHECK THE VOLTAGE
OF THE LDOs
U305
MP3 IC
NO MIDI, MP3
J301
T-FLASH SOCKET
NO T-FLASH RECOG.
U304
CHARGING IC
NO CHARGE
X101
X’TAL
CHECK THE FREQ’ 32.768K
U503
RF IC
CAN’T MAKE A CALL
U403
FM RADIO IC
DON’T OPERATE RADIO
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 93 -
10. ENGINEERING MODE
A. About Engineering Mode
Engineering mode is designed to allow a service man/engineer to view and test the basic functions
provided by a handset.
B. Access Codes
The key sequence for switching the engineering mode on is 2945#*#. Pressing END will switch back to
non-engineering mode operation.
C. Key Operation
Use Up and Down key to select a menu and press ‘select’ key to progress the test. Pressing ‘back’ key
will switch back to the original test menu.
D. Engineering Mode Menu Tree
10. ENGINEERING MODE
Engineering Mode
BB Test RF Test MF Mode Trace
option
Call Timer
LCD
Backlight
Buzzer
Vibrator
ADC
Battery
Audio
DAI
SAR Test
Change
frequency
band
All Auto Test
Backlight
Buzzer
Vibrator
LCD
Key PAD
MicSpkTest
AUTO
GENIE
AT CMD
STATUS
All Calls
Reset
Fact.
Reset
S/W
Version
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 94 -
10. ENGINEERING MODE
10.1 BB Test [MENU 1]
10.1.1 LCD
1) Brightness
2) COLOUR : WHITE, RED, GREEN, BLUE, BLACK
10.1.2 Backlight
This menu is to test the LCD Backlight.
1) Backlight on : LCD Backlight on.
2) Backlight off : LCD Backlight off.
3) Backlight value : This controls brightness of Backlight. When entering into the menu, the present
backlight-value in the phone is displayed. Use Left/Right key to adjust the level of brightness. The
value of the brightness set at last will be saved in the NVRAM.
10.1.3 Buzzer
This menu is to test the melody sound.
1) Melody on : Melody sound is played through the speaker.
2) Melody off : Melody sound is off.
10.1.4 Vibrator
This menu is to test the vibration mode.
1) Vibrator on : Vibration mode is on.
2) Vibrator off : Vibration mode is off.
10.1.5 ADC (Analog to Digital Converter)
This displays the value of each ADC.
1) MVBAT ADC : Main Voltage Battery ADC
2) AUX ADC : Auxiliary ADC
3) TEMPER ADC : Temperature ADC
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 95 -
10. ENGINEERING MODE
10.1.6 BATTERY
1) Bat Cal : This displays the value of Battery Calibration. The following menus are displayed in order :
BAT_LEV_4V, BAT_LEV_3_LIMIT, BAT_LEV_2_LIMIT, BAT_LEV_1_LIMIT, BAT_IDLE_LI MIT,
BAT_INCALL_LIMIT, SHUT_DOWN_VOLTAGE, BAT_RECHARGE_LMT
2) TEMP Cal : This displays the value of Temperature Calibration. The following menus are displayed
in order : TEMP_HIGH_LIMIT, TEMP_HIGH_RECHARGE_LMT, TEMP_LOW_RECHARGE_LMT,
TEMP_LOW_LIMIT
10.1.7 Audio
This is NOT a necessary menu to be used by neither engineers nor users.
10.1.8 DAI (Digital Audio Interface)
This menu is to set the Digital Audio Interface Mode for Speech Transcoder and Acoustic testing.
1) DAI AUDIO : DAI audio mode
2) DAI UPLINK : Speech encoder test
3) DAI DOWNLINK : Speech decoder test
4) DAI OFF : DAI mode off
10.2 RF Test [MENU 2]
10.2.1 SAR test
This menu is to test the Specific Absorption Rate.
1) SAR test on : Phone continuously process TX only. Call-setup equipment is not required.
2) SAR test off : TX process off
10.2.2 Change frequency band
This menu is to change frequency band.
1) GSM ONLY
2) DCS ONLY
3) PCS ONLY
4) 850 ONLY
5) DEFAULT
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 96 -
10. ENGINEERING MODE
10.3 MF mode [MENU 3]
This manufacturing mode is designed to do the baseband test automatically. Selecting this menu will
process the test automatically, and phone displays the previous menu after completing the test.
10.3.1 All auto test
LCD, Backlight, Vibrator, Buzzer, Key Pad, Mic & Speaker,
10.3.2 Backlight
LCD Backlight is on for about 1.5 seconds at the same time, then off.
10.3.3 Buzzer
This menu is to test the volume of Melody. It rings in the following sequence. Volume 1, Volume 2,
Volume 3, Volume 0 (mute), Volume 4, Volume 5.
10.3.4 Vibrator
Vibrator is on for about 1.5 seconds.
10.3.5 LCD
1) LCD
Main LCD screen resolution tests horizontally and vertically one by one and fills the screen.
10.3.6 Key pad
When a pop-up message shows ‘Press Any Key’, you may press any keys including side keys, but not
[Soft2 Key]. If the key is working properly, name of the key is displayed on the screen. Test will be
completed in 15 seconds automatically.
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 97 -
10. ENGINEERING MODE
10.3.7 MicSpk Test
The sound from MIC is recorded for about 3 seconds, then it is replayed on the speaker automatically.
10.4 Trace option [MENU 4]
This is NOT a necessary menu to be used by neither engineers nor users.
10.5 Call timer [MENU 5]
This menu is to set the Digital Audio Interface Mode for Speech Transcoder and Acoustic testing.
1) All calls : This displays total conversation time. User cannot reset this value.
2) Reset settings : This resets total conversation time to this, [00:00:00].
10.6 Fact. Reset [MENU 6]
This Factory Reset menu is to format data block in the flash memory and this procedure set up the
default value in data block.
Attention
1 Fact. Reset (i.e.Factory Reset) should be only used during the Manufacturing process.
2 Servicemen should NOT progress this menu, otherwise some of valuable data such as Setting
value, RF Calibration data, etc. cannot be restored again.
10.7 S/W version
This displays software version stored in the phone.
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 98 -
11. STAND ALONE TEST
11.1 Introduction
This manual explains how to examine the status of RX and TX of the model.
A. Tx Test
TX test - this is to see if the transmitter of the phones is activating normally.
B. Rx Test
RX test - this is to see if the receiver of the phones is activating normally.
11.2 Setting Method
A. COM port
a. Move your mouse on the “Option” button, then click the right button of the mouse and select “Com
setting”.
b. In the “Dialog Menu”, select the values as explained below.
- Port : select a correct COM port
- Baud rate : 115000
- Leave the rest as default values
B. Tx
1. Selecting Channel
- Select one of GSM or DCS/PCS Band and input appropriate channel.
2. Selecting APC
a. Select either Power level or Scaling Factor.
b. Power level
- Input appropriate value GSM850 (between 5~19) or DCS/PCS (between 0~15)
c. Scaling Factor
- A ‘Ramp Factor’ appears on the screen.
- You may adjust the shape of the Ramp or directly input the values.
C. Rx
1. Selecting Channel
- Select one of GSM850 or DCS/PCS Band and input appropriate channel.
2. Gain Control Index (0~ 26) and RSSI level
- See if the value of RSSI is close to -16dBm when setting the value between 0 ~ 26 in Gain Control
Index.
- Normal phone should indicate the value of RSSI close to -16dBm.
11. STAND ALONE TEST
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 99 -
11. STAND ALONE TEST
11.3 Means of Test
a. Select a COM port
b. Set the values in Tx or Rx
c. Select band and channel
d. After setting them all above, press connect button.
e. Press the start button
Figure 11.3.1 HW test program
Connect Button
- 100 -
11. STAND ALONE TEST
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Figure 10.3.3 Ramping profile
Figure 10.3.2 HW test setting
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 101 -
12. AUTO CALIBRATION
12.1 Overview
Auto-cal (Auto Calibration) is the PC side Calibration tool that perform Tx, Rx and Battery Calibration
with Agilent 8960(GSM call setting instrument) and Tektronix PS2521G(Programmable Power supply).
Auto-cal generates calibration data by communicating with phone and measuring equipment then write
it into calibration data block of flash memory in GSM phone.
12.2 Equipment List
Figure 12.2.1 Equipment Setup
12. AUTO CALIBRATION
Equipment for Calibration Type / Model Brand
Wireless Communication Test Set HP-8960 Agilent
RS-232 Cable and Test JIG LG
RF Cable LG
Power Supply HP-66311B Agilent
GPIO interface card HP-GPIB Agilent
Calibration & Final test software LG
Test SIM Card
PC (for Software Installation) Pentium II class above 300MHz
Table 12.2.1 Calibration Equipment List.
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