LG CU405 User manual

Date: May, 2007 / Issue 1.0
Service Manual Model : CU405
Service Manual
CU405
Internal Use Only

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1. INTRODUCTION .............................. 5
1.1 Purpose................................................... 5
1.2 Regulatory Information............................ 5
2. PERFORMANCE...............................7
2.1 Default Packaging Accessories ...............7
2.2 System Specification................................7
2.3 Using Condition (Accessory)....................7
2.4 Radio Performance..................................8
2.5 Current Consumption.............................11
2.6 Operation Time ......................................11
2.7 RSSI Bar................................................11
2.8 Battery Bar.............................................12
2.9 BACKUP BATTERY : Over 50 hours ....12
2.10 Sound Level.........................................12
3. RF TECHNICAL BRIEF...................13
3.1 MSM6280 (Block Diagram)....................13
3.2 MSM6280 (GPIO MAP) .........................14
3.3 RF Block Diagram..................................16
3.4 Memory..................................................17
3.5 Camera & LCD Interface........................18
3.6 Interface USB,UART,SIM,JTAG ............19
3.7 Power Block Diagram ............................20
3.8 Peripheral...............................................21
3.9 Audio Block Diagram .............................22
3.10 Digital Baseband(DBB/MSM6280).......23
3.11 Subsystem(MSM6280) ........................26
3.12 Power Block.........................................33
3.13 External memory interface...................38
3.14 H/W Sub System..................................39
3.15 Main Features......................................57
4. TROUBLE SHOOTING ...................62
4.1 RF Component.......................................62
4.2 Checking VCXO Block...........................66
4.3 Checking Ant. SW Module Block ...........68
4.4 Checking UMTS Block...........................71
4.5 Checking GSM Block.............................78
4.6 Power ON Troubleshooting....................86
4.7 Charger Troubleshooting .......................88
4.8 USB Troubleshooting.............................91
4.9 SIM Detect Troubleshooting ..................93
4.10 Camera Troubleshooting .....................94
4.11 Keypad Backlight Troubleshooting ......95
4.12 Folder ON/OFF Troubleshooting .........96
4.13 Main LCD Troubleshooting ..................97
4.14 Receiver Path ......................................98
4.15 Headset path......................................100
4.16 Speaker phone path...........................102
4.17 Main microphone ...............................104
4.18 Headset microphone..........................106
4.19 Vibrator ..............................................108
5. DOWNLOAD .................................109
5.1 Introduction ..........................................109
5.2 Downloading Procedure.......................109
5.3 Troubleshooting download errors ........123
5.4 Caution.................................................130
6. BLOCK DIAGRAM ........................131
6.1 CU405 Block Diagram .........................131
7. Circuit Diagram ............................133
8. pcb layout .....................................140
9. Calibration & RF Auto
Test Program ................................145
9.1 Configuration of HOT KIMCHI .............145
9.2 How to use HOT KIMCHI.....................149
9.3 Example for using HOT KIMCHI..........150
10. EXPLODED VIEW &
REPLACEMENT PART LIST ..... 153
10.1 EXPLODED VIEW ............................ 153
10.2 Replacement Parts
<Mechanic component>.................... 155
<Main component> ........................... 158
10.3 Accessory ......................................... 175
Table Of Contents
LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes

- 4 -
LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes

LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 5 -
1.1 Purpose
This manual provides the information necessary to repair, calibration, description and download the
features of this model.
1.2 Regulatory Information
A. Security
Toll fraud, the unauthorized use of telecommunications system by an unauthorized part (for example,
persons other than your company’s employees, agents, subcontractors, or person working on your
company’s behalf) can result in substantial additional charges for your telecommunications services.
System users are responsible for the security of own system. There are may be risks of toll fraud
associated with your telecommunications system. System users are responsible for programming and
configuring the equipment to prevent unauthorized use. The manufacturer does not warrant that this
product is immune from the above case but will prevent unauthorized use of commoncarrier
telecommunication service of facilities accessed through or connected to it. The manufacturer will not
be responsible for any charges that result from such unauthorized use.
B. Incidence of Harm
If a telephone company determines that the equipment provided to customer is faulty and possibly
causing harm or interruption in service to the telephone network, it should disconnect telephone
service until repair can be done. A telephone company may temporarily disconnect service as long as
repair is not done.
C. Changes in Service
A local telephone company may make changes in its communications facilities or procedure. If these
changes could reasonably be expected to affect the use of the phones or compatibility with the net
work, the telephone company is required to give advanced written notice to the user, allowing the user
to take appropriate steps to maintain telephone service.
D. Maintenance Limitations
Maintenance limitations on the phones must be performed only by the manufacturer or its authorized
agent. The user may not make any changes and/or repairs expect as specifically noted in this manual.
Therefore, note that unauthorized alternations or repair may affect the regulatory status of the system
and may void any remaining warranty.
1. INTRODUCTION
1. INTRODUCTION

LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
E. Notice of Radiated Emissions
This model complies with rules regarding radiation and radio frequency emission as defined by local
regulatory agencies. In accordance with these agencies, you may be required to provide information
such as the following to the end user.
F. Pictures
The pictures in this manual are for illustrative purposes only; your actual hardware may look slightly
different.
G. Interference and Attenuation
A phone may interfere with sensitive laboratory equipment, medical equipment, etc. Interference from
unsuppressed engines or electric motors may cause problems.
H. Electrostatic Sensitive Devices
ATTENTION
Boards, which contain Electrostatic Sensitive Device (ESD), are indicated by the sign.
Following information is ESD handling:
• Service personnel should ground themselves by using a wrist strap when exchange system boards.
• When repairs are made to a system board, they should spread the floor with anti-static mat which is
also grounded.
• Use a suitable, grounded soldering iron.
• Keep sensitive parts in these protective packages until these are used.
• When returning system boards or parts like EEPROM to the factory, use the protective package as
described.
1. INTRODUCTION
- 6 -

LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
2. PERFORMANCE
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2.1 Default Packaging Accessories
2.2 System Specification
2.3 Using Condition (Accessory)
1) Maximum Using Condition (Using Environment)
2. PERFORMANCE
Item Specification Performance
Charging Voltage : 4.2V
1. Battery Li-ion, 1,100mAh 1ea Charging Current : 650mA
(Charging Time : under 3 hours)
2.Travel Adapter Output : 4.6V, 800mA Input : AC 100 ~ 240V
Item Specification
Shape GSM850/EGSM/1800/1900 and WCDMA Slim Clamshell
Size 92.7 x 49.5 x 20.9 mm
Weight 100 g (with Battery)
Power 3.7V normal, 1100 mAh Li-Polymer
LCD TFT Main LCD(2°Ø, 262K, 176 x 220), MSTN Sub LCD
Travel Adaptor Input : AC 100~240V , Output : 4.6V, 800mA
Item Specification
Available AC Input Power AC 100 ~ 240V Max
Available DC Input Power 12V Max
Storage Temperature -30 ~ +85 °C

LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
2) General Using Condition
2.4 Radio Performance
1) Transmitter - GSM Mode
2. PERFORMANCE
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Item Spec. Min Typ. Max Unit
Output Power DC Power 12 Vdc
Battery Power 3.2 3.7 4.2 Vdc
Input Power AC Power 100 110 240 Vac
Current Consumption W
Operation Temperature -20 60 °C
Item Specification
Phase Error Rms : 5°
Peak : 20°
Frequency Error GSM : 0.1 ppm
DCS/PCS : 0.1 ppm
EMC(Radiated Spurious Emission GSM/DCS : < -28dBm
Disturbance)
Transmitter Output power and Burst Timing GSM : 5dBm - 33dBm ± 3dB
DCS/PCS : 0dBm - 30dBm ± 3dB
Burst Timing <3.69us
Spectrum due to modulation out to less 200kHz : -36dBm
than 1800kHz offset 600kHz : -51dBm/-56dBm
GSM :
1800-3000kHz :< -63dBc(-46dBm)
Spectrum due to modulation out to larger 3000kHz-6000kHz : <-65dBc(-46dBm)
than 1800kHz offset to the edge of the 6000kHz < : < -71dBc(-46dBm)
transmit band DCS :
1800-3000kHz :< -65dBc(-51dBm)
6000kHz < : < -73dBc(-51dBm)
Spectrum due to switching transient 400kHz : -19dBm/-22dBm(5/0), -23dBm
600kHz : -21dBm/-24dBm(5/0), -26dBm
Reference Sensitivity - TCH/FS Class II(RBER) : -105dBm(2.439%)
Usable receiver input level range 0.012(-15 - -40dBm)
Intermodulation rejection - Speech ± 800kHz, ± 1600kHz
channels : -98dBm/-96dBm (2.439%)
AM Suppression -98dBm/-96dBm (2.439%)
-GSM : -31dBm - DCS : -29dBm
Timing Advance ± 0.5T

LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
2. PERFORMANCE
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- Frequency Range : GSM(824~849MHz/869~894MHz), DCS(1710~1785MHz/1805~1880MHz)
PCS(1850~1910MHz/1930~1990MHz)
- Oscillator Frequency Range : 1688 ~ 1736 MHz
- Intermediate Frequency : None
- Normal Maximum Output Power : 1995.3mW (33dBm)
2)Transmitter - WCDMA Mode
Item Specification
Transmit Frequency WCDMA850 : 824 MHz ~ 849 MHz
WCDMA1900 : 1850 ~1910 MHz
Maximum Output Power +24 dBm / 3.84 MHz, +1 / -3 dB
Frequency Error within ±0.1 PPM
Open Loop Power Control Normal Conditions : within ±9 dB,
Extreme Conditions : within ±12 dB
Minimum Transmit Power < -50 dBm /3.84 MHz
Occupied Bandwidth < 5 MHz at 3.84 Mcps (99% of power)
Adjacent Channel > 33 dB @ ±5 MHz,
Leakage Power Ratio (ACLR) > 43 dB @ ±10 MHz
< -36 dBm / 1 kHz RW @ 9 kHz ≤ < 150 kHz
< -36 dBm / 10 kHz RW @ 150 KHz ≤ f < 30 MHz
< -36 dBm / 100 kHz RW @ 30 MHz ≤ f < 1 GHz
Spurious Emissions < -30 dBm / 1 MHz RW @ 1 GHz ≤ f < 12.75 GHz
|f-fc| > 12.5 MHz < -41 dBm / 300 kHz RW @ 1893.5 MHz < f < 1919.6 MHz
< -67 dBm / 100 kHz RW @ 925 MHz ≤ f ≤ 935 MHz
< -79 dBm / 100 kHz RW @ 935 MHz < f ≤ 960 GHz
< -71 dBm / 100 kHz RW @ 1805 MHz ≤ f ≤ 1880 MHz
Transmit Intermodulation < -31 dBc @ 5 MHz & < -41 dBc @ 10 MHz
when Interference CW Signal Level = -40 dBc
Error Vector Magnitude < 17.5 %, when Pout ≥ -20 dBm
Peak Code Domain Error < -15 dB at Pout ≥ -20 dBm

LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3)Receiver - GSM Mode
4)Receiver - WCDMA Mode
2. PERFORMANCE
- 10 -
Item Specification
Sensitivity (TCH/FS Class II) -105dBm (GSM / EGSM / DCS / PCS)
Co-Channel Rejection C/Ic=7dB (GSM / EGSM)
(TCH/FS Class II, RBER, TU high/FH) Storage -30 ~ +85 (DCS / PCS)
Adjacent Channel 200kHz C/la1 = -12dB(GSM / EGSM / DCS / PCS)
Rejection 400kHz C/la2 = -44dB(GSM / EGSM / DCS / PCS)
Wanted Signal : -98dBm Wanted Signal : -96dBm
Intermodulation Rejection
1st interferer : -44dBm 1st interferer : -44dBm
2nd interferer : -45dBm 2nd interferer : -45dBm
(GSM / EGSM) (DCS / PCS)
Blocking Response Wanted Signal : -101dBm Wanted Signal : -101dBm
(TCH/FS Class II, RBER) Unwanted : Depend on Freq. Unwanted : Depend on Freq.
Item Specification
Receive Frequency WCDMA850 : 849 MHz ~ 894 MHz
WCDMA1900 : 1930 ~1990 MHz
Reference Sensitivity Level BER < 0.001 when Îor = -106.7 dBm / 3.84 MHz
Maximum Input Level BER < 0.001 when Îor = -25 dBm / 3.84 MHz
Adjacent Channel ACS > 33 dB where BER < 0.001 when Îor = -92.7 dBm / 3.84 MHz
Selectivity (ACS) & Ioac = -52 dBm / 3.84 MHz @ ±5 MHz
BER < 0.001 when Îor = -103.7 dBm / 3.84 MHz
Blocking Characteristic & Iblocking = -56 dBm / 3.84 MHz @ Fuw(offset) = ±10 MHz
or Iblocking = -44 dBm / 3.84 MHz @ Fuw(offset) = ±15 MHz
Spurious Response BER < 0.001 when Îor = -103.7 dBm / 3.84 MHz & Iblocking = -44 dBm
BER < 0.001 when Îor= -103.7 dBm / 3.84 MHz
Intermodulation & Iouw1 = -46 dBm @ Fuw1(offset) = 10 MHz
& Iouw2 = -46 dBm / 3.84 MHz @ Fuw2(offset) = ±20 MHz
Spurious Emissions < -57 dBm / 100 kHz BW @ 9 kHz ≤ f < 1 GHz
< -47 dBm / 1 MHz BW @ 1 GHz ≤ f ≤ 12.75 GHz

LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
2. PERFORMANCE
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2.5 Current Consumption
2.6 Operation Time
2.7 RSSI Bar
WCDMA Only GSM Only
Sleep Mode 1.5mA(sleep current) ↓1.5mA(sleep current) ↓
Standby 4.4mA(DRX=1.28sec) ↓4.4mA(MF=5) ↓
Talk Mode VC 12dBm : 366 mA↓366 mA (Tx Lvl:5) ↓
NO SVC Mode TBD TBD
Power Off 300 µ A ↓300 µ A ↓
(Backup Battery Charging) 500 µ A ↓500 µ A ↓
Level Change WCDMA GSM
BAR 5 →4-85 ±2 dBm -85 ±2 dBm
BAR 4 →3-90 ±2 dBm -90 ±2 dBm
BAR 3 →2-95 ±2 dBm -95 ±2 dBm
BAR 2 →1-98 ±2 dBm -100 ±2 dBm
BAR 1 →0-101 ±2 dBm -105 ±2 dBm
Stand by Voice Call VT
250 hours ↑ = 4.4mA 180 mins ↑= 366mA
WCDMA ↓↓
Only (1100mAh battery, (1100mAh battery, /
DRX cycle = 1..28) TX = 12dBm)
250 hours ↑= 4.4mA 180 mins ↑= 366mA
GSM ↓↓
Only (1100mAh battery, (1100mAh battery, /
Paging frame class5) TX = Level 5)

LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
2.8 Battery Bar
2.9 BACKUP BATTERY : over 50 hours
(when normal POWER OFF/EMERGENCY OFF)
2.10 Sound Level
Ring Tone : Cingular Requested Specification
30Cm distance : under 75dBspl
2.5Cm distance : under 115dBspl
Contact : under 140dBspl (Reporting Maximum Value)
Key Tone (Only Numeric Keypad measured) :
1) Standby :
a) Speaker : under 140dBspl ( when contact state / Maximum Tone ), over 70dBspl ( when
30cm distance / Minimum Tone),
b) Headset : 60 ~ 98dBspl
2) Talk :
a) Speaker : 60 ~ 98dBspl
b) Headset : 60 ~ 98dBspl
2. PERFORMANCE
- 12 -
Indication Standby
Bar3 Over 3.68 ± 0.05V
Bar 3 →23.68 ± 0.05V
Bar 2 →13.6 ± 0.05V
Bar 1 →Empty 3.52 ± 0.05V
Low Voltage, Warning message+ 3.42 ± 0.05V (Stand-by) / 3.52 ± 0.05V (Talk)
Blinking [Interval : 3min(Stand-by) / 1min(Talk)]
Power Off 3.28 ± 0.05V

LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TECHNICAL BRIEF
- 13 -
3.1 MSM6280 (Block Diagram)
3. RF TECHNICAL BRIEF
MSM6280
CONNECTIVITY
CAMERA
PROCESSING
(Default 8bit
Interface)
GRAPHICS
VIDEO
AUDIO
DUAL MEMORY BUS
Modem QDSP 4000
PLL
QDSP 4000 ARM 926ejs
With Jazelle
UMTS, WCDMA,
HSDPA processor
BT 1.2
processor
Rx ADC
Tx DAC
MP3, AAC,
EVRC, QCELP
AMR, CMX, MIDI
EBI 1 EBI 2
Open GL ES
3D, 2D
MPEG-4
H.263, H.264
Keypad I/F
USB
UART1
UART2 / RUIM1
UART3 / PMIC SBI
Camera 0.3M
KEY
PAD
I/O Conn
USB
NAND Flash
512M
SDRAM
512M
LCD
(2inch)
PM6650
GSM/GPRS/EDGE
processor
JTAG
RF SBI
GPIO
USIM

LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3.2 MSM6280 ( GPIO MAP )
3. TECHNICAL BRIEF
- 14 -
KEY_COL(0)KYPD_17GPIO[53]
KEY_COL(1)KYPD_15GPIO[52]
KEY_COL(2)KYPD_13GPIO[51]
KEY_COL(3)KYPD_11GPIO[50]
KEY_COL(4)KYPD_9GPIO[49]
KEY_ROW(4)KEYSENSE4_NGPIO[48]
KEY_ROW(3)KEYSENSE3_NGPIO[47]
KEY_ROW(2)KEYSENSE2_NGPIO[46]
KEY_COL(5)KYPD_MEMOGPIO[45]
UART1_DTRGPIO[44]
LCD_RESET_NGPIO[43]
PS_HOLDPS_HOLDGPIO[42]
EAR_SENSE_NGPIO[41]
PM_INT_NPM_INT_NGPIO[40]
UART1_DCDGPIO[39]
LCD_CS_NLCD2_CS_NGPIO[38]
LCD_ENGPIO[37]
VGA_CAM_PWDNXMEM2_CS_N(3)GPIO[36]
XMEM2_CS_N(2)GPIO[35]
EBI2_ADDR(20);LCD_ADSA2(20)GPIO[34]
NAND_READYNAND_READYGPIO[33]
SDCC_DAT(0)GPIO[32]
SDCC_CLKGPIO[31]
SDCC_CMDGPIO[30]
PA_ON2PA_ON2GPIO[29]
LCD_IF_MODEGPIO[28]
I2C_SCLI2C_SCLGPIO[27]
I2C_SDAI2C_SDAGPIO[26]
BT_CLKBT_CLKGPIO[25]
BT_SBSTBT_SBSTGPIO[24]
BT_SBCKBT_SBCKGPIO[23]
BT_SBDTBT_SBDTGPIO[22]
BT_TX_RX_NBT_TX_RX_NGPIO[21]
BT_DATABT_DATAGPIO[20]
LCD_BL_CTRLGP_CLKGPIO[19]
CAM_ENGPIO[18]
CAM_VGA_RESETCAM_RESET_NGPIO[17]
CAM_VSYNCCAM_VSYNCGPIO[16]
CAM_HSYNCCAM_HSYNCGPIO[15]
GRFC13
GPIO[14]
CAM_MCLKCAM_MCLKGPIO[13]
ANT_SEL3ANT_SEL3_EN_N(GRFC9)GPIO[12]
ANT_SEL2ANT_SEL2_EN_N(GRFC8)GPIO[11]
ANT_SEL1ANT_SEL1_EN_N(GRFC7)GPIO[10]
ANT_SEL0ANT_SEL0_EN_N(GRFC6)GPIO[9]
GSM_SAW_SW_MODEGSM_SAW_SW_MODEGPIO[8]
NCGPIO[7]
WCDMA_SAW_SW_MODEAGPIO[6]
GSM_PA_BANDGSM_PA_BAND(GRFC2)GPIO[5]
GAM_PA_ENGSM_PA_EN(GRFC1)GPIO[4]
WCDMA_SAW_SW_MODEBGPIO[3]
PA_ON1PA_ON1GPIO[2]
GPS_SBDT
GPIO[1]
GPS_SBCK (WDOG_STG)GPIO[0]
CU400GPIO(RFCMOS)GPIO#

LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TECHNICAL BRIEF
- 15 -
ON_SW_NMDP_VSYNC_PRIGPIO[105]
LCD_MAKER_IDMDP_VSYNC_SECGPIO[104]
GRFC12GPIO[103]
GRFC11GPIO[102]
SDCC_DAT(3)
GPIO[101]
SDCC_DAT(2)GPIO[100]
SDCC_DAT(1)
GPIO[99]
PA_POWER_CTL_NGPIO[98]
IrDA_SD
GPIO[97]
UART_RXDUART1_RXDGPIO[96]
UART_TXDUART1_TXD(NAND_BOOT_ERR)GPIO[95]
TCXO_ENTCXO_ENGPIO[94]
SBST1GPIO[93]
FOLDER_DETECT
GPIO[92]
MSM_USIM_CLKUSIM_CLKGPIO[91]
MSM_USIM_RST_NUSIM_RESETGPIO[90]
USIM_PWR_ENGPIO[89]
MSM_USIM_DATAUSIM_DATAGPIO[88]
UART3_RFR_NGPIO[87]
UART3_CTS_NGPIO[86]
UART3_RXGPIO[85]
UART3_TXGPIO[84]
CAM_DATA0GPIO[83]
CAM_PCLKCAM_PCLKGPIO[82]
CAM_DATA1GPIO[81]
SPK_AMP_ENGRFC14GPIO[80]
SDRAM_ADDR(0)SDRAM_ADDR(0)GPIO[79]
SDRAM_DQM(2)SDRAM_DQM(2)GPIO[78]
GPIO[77]
LCD_RESET_NGPIO[76]
SDRAM_DQM(3)SDRAM_DQM(3)GPIO[75]
SDRAM_DATA(23)SDRAM_DATA(23)GPIO[74]
SDRAM_DATA(22)SDRAM_DATA(22)GPIO[73]
SDRAM_DATA(21)SDRAM_DATA(21)GPIO[72]
SDRAM_DATA(20)SDRAM_DATA(20)GPIO[71]
SDRAM_DATA(19)SDRAM_DATA(19)GPIO[70]
SDRAM_DATA(18)SDRAM_DATA(18)GPIO[69]
SDRAM_DATA(17)SDRAM_DATA(17)GPIO[68]
SDRAM_DATA(16)SDRAM_DATA(16)GPIO[67]
MONO_STEREO_HS_DET_NGPIO[66]
HOOK_SENSEGPIO[65]
UART_RIGPIO[64]
KEY_ROW(1)KEYSENSE1_NGPIO[63]
KEY_ROW(0)KEYSENSE0_NGPIO[62]
CAM_DATA(7)CAM_DATA9GPIO[61]
CAM_DATA(6)CAM_DATA8GPIO[60]
CAM_DATA(5)CAM_DATA7GPIO[59]
CAM_DATA(4)CAM_DATA6GPIO[58]
CAM_DATA(3)CAM_DATA5GPIO[57]
CAM_DATA(2)CAM_DATA4GPIO[56]
CAM_DATA(1)CAM_DATA3GPIO[55]
CAM_DATA(0)CAM_DATA2GPIO[54]
CU400GPIO(RFCMOS)GPIO#

LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3.3 RF Block Diagram
3. TECHNICAL BRIEF
- 16 -
-TX_ON
-TX_AGC_ADJ
-DAC_REF
-TX_IQ
-SSBDT_RFR
-TCXO
-TCXO_EN
-TRK_LO_ADJ
RF_ON -
VCONTROL-
DAC_REF -
TX_IQ -
SBDT -
RX_IQ -
SSBI -
TX SAW
FILTER
-LB_LNA_IN
VCTCXO
19.2MHz
PLL1
TCXO
RFR6275
RTR6275
MSM6280
-HB_RF_OUT1
-RX_IQ
-V_TUNE1
PM6650
RX_IQ -
UMTS RF
GSM RF
-EGSM_INP
-EGSM_INN
-DCS_INP
-DCS_INN
-GPCS_INP
-GPCS_INN
-LB_RF_OUT1
GSM
QUAD PA
PLL
TCXO 
UMTS_CP_OUT-
FRONT
END
MODULE
SP8T
RX SAW
FILTER
HB_INP-
HB_LNA_OUT -
HB_INM-
WCDMA 850
DUPLEXER
WCDMA 1900
DUPLEXER
GCELL/EGSM
TX SAW
FILTER
WCDMA
Dual PA
-LB_RF_OUT2
PLL2
-V_TUNE2
Loop
filter
TCXO
-SSBDT_RTR
-PM_SBDT
SBDT -
BLUETOOTH RF MODULE
TCXO
BT_SBST/CK/DT
BT_RX_TX_N
BT_DATA
BT_SBST/CK/DT
BT_RX_TX_N
BT_DATA
BLUETOOTH RF
TX SAW
FILTER
DCS/PCS
-HB_RF_OUT2
-GCELL_INP
-GCELL_INN
-HB_LNA_IN
RX SAW
FILTER
LB_INP-
LB_LNA_OUT-
LB_INM-
Coupler
Coupler
-PWD_DET_IN

LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TECHNICAL BRIEF
- 17 -
3.4 Memory
PMIC
MSM6280
SDRAM
512Mb
(64MB)
NAND
512Mb
(64MB)
DATA[31:0]
ADDRESS[15:0]
WE*
CS*
CAS*
RAS*
CLK_EN
CLK
DQM[3:0]
NAND_CS*
NAND_RE*
NAND_WE*
NAND_CLE
NAND_WP*
NAND_ALE
NAND_READY
DATA[7:0]
USIM
SIM_RESET
SIM_IO
SIM_CLK
EBI1 EBI2

LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3.5 Camera & LCD Interface
3. TECHNICAL BRIEF
- 18 -
MSM6280
M_LCD "2
TFT(QCIF)
S_LCD"0.98
MSTN
0.3M
Camera
CAM_DATA[7:0]
CAM_HSYNC
CAM_VSYNC
CAM_PCLK
CAM_MCLK
I2C_SDA
I2C_SCL
VGA_CAM_PWDN
VGA_CAM_RESET
IOVDD_2.6V (MSMP)
VREG_CAM_2.8V
EBI2_DATA[15:0]
LCD_ADS
LCD_CS_N
EBI2_WE_N
LCD_RESET_N
VREG_MSMP_2.6V
LCD_IF_MODE
LCD_MAKER_ID
SUB_LCD_CS_N

LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TECHNICAL BRIEF
- 19 -
3.6 Interface USB,UART,SIM,JTAG
USB
MSM6280 PM6650-2
RECEPTACLE ( I/O Conn.)
UART3
/PM_SBI
UART1
VBUS
D+
D-
SIM
UART2
/RUIM1
USB
TRANSCEIVER
I/O
RST
CLK
USB_DAT
USB_SE0
USB_OE_N
USB , UART
JTAG
SSBDT_PM
RX
TX
USIM
TRANSCEIVER
PM6650
SBI
JTAG
JTAG Interface

LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3.7 Power Block Diagram
3. TECHNICAL BRIEF
- 20 -
PM6650-2
VREG_MSMP (2.6V/300mA)
VREG_MSMC (1.25V/500mA)
VREG_MSMA
(2.6V/300mA)
VREG_MSME(1.8V/500mA)
NAND FLASH
NAND FLASH
TR, Other
TR, Other
SDRAM
SDRAM
RTR6275
RTR6275
RFR6275
RFR6275
VREG_RFTX
(2.6V/150mA)
VREG_RFRX1 (2.6V/150mA)
Bluetooth
Bluetooth
USIM
USIM
Receptacle
Receptacle
0.3M
CAMERA
0.3M
CAMERA
VREG_RUIM(2.85V/150mA)
TCXO
TCXO
VREG_WLAN(VREG_BT)(2.85V/150mA)
VREG_TCXO (2.85V/ 50mA)
LCD
LCD
+VPWR
VDD_MSM
VDD_RF
VDD_MAIN
VDD_SPKR
VDD_WLAN
VDD_PA
VDD_MSMC
VDD_MSME
VDD_RUIM
VDD_ANA
PAM(W850
/W1900)
PAM(W850
/W1900)
FEM
FEM
VREG_W_PA
MSM6280
MSM6280
Charge Pump
Charge Pump LCD Backlight
LCD Backlight
+VPWR
VCOIN
-+
+5V_PWR
FET
Pass Tr VCHG
USB_VBUS
Sense
resistor
Sense
resistor
ISNS_P
ISNS_M
BAT_FET_N
USB_VBUS
VBATT
+VPWR
CHG_CTL_N
MCP
VREG_SYNTH(2.6V/50mA)
Pass Tr
VREG_RF_2.85V(2.85V/150mA)
PAM(GSM)
PAM(GSM)
VREG_CAM_2.8V(150mA)
+VPWR
VREG_MSMP_2.6V
(2.6V/300mA)
IOVDD
AVDD
TPA2005
TPA2005
BACKLIGHT_CTRL
SPK_AMP_EN
Pin67-VREG_RFRX2
Pin69-VREG_RFRX1
Pin73-VREG_RFTX
Pin81-VREG_SYNTH
+VPWR
FET
VREG_MSMP_2.6V

LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TECHNICAL BRIEF
- 21 -
3.8 Peripheral
Charge Pump
Charge Pump
+VPWR
MSM6280
PM6650-2
MAIN KEYPAD backlight
USB (Recep)
TCXO
(19.2MHz)
Xtal:sleep
(32.768kHz)
USIM
KYPD_DRV_N
Xtal:USB
(48MHz)
VIB_DRV_N
GP1_DRV_N
RUIM_IO ,CLK,
RST_N
RUIM_M_IO, CLK, RST_N
USB_DAT, SE0 , OE_N
USB_D+, D-, VBUS
SSBDT_PM
AMUX_IN2
AMUX_IN1
USB
BUFF_TCXO
SLEEP_CLK
Remote PWR ON (Recep)
TRST_N, TCK, TMS, TDI, TDO, RTCK
PM_INT_N
PS_HOLD
TCXO_EN
PM_ON_SW_N
RESET_IN_N
JTAG
LED,Motor
Driver
USIM Level
Trans
SBI
USB Trans
ADC
AMUX_OUT
+VPWR
Motor
VBAT_SENSE
REF_ADC
VBAT_TEMP
HKADC0
HKADC1
HKADC3
HKADC4
HKADC5
PA_THERM
UART2 (USIM)
UART3 (PM_SBI)
UART1 (IrDA)
UART TX/RX
JTAG CON, UART,USB
USB_D+,D-,VBUS
KEY_ROW(0:4)
KEY_COL(0:5)
FOLDER_DET_N Hall Sensor
BACKLIGHT_CTRL
HOOK_SENSE
EAR_SENSE_N EAR JACK
KEY
MOTOR_PWR
TTY_ADC_DET
TTY_ADC_DET