Page 1
Date: Mugust, 2007 / Issue 1.0
Service Manual
Model : CU575
Service Manual
CU575
Page 2
- 3 -
1. INTRODUCTION .............................. 5
1.1 Purpose................................................... 5
1.2 Regulatory Information............................ 5
2. PERFORMANCE...............................7
2.1 System Specification................................7
2.2 Using Condition (Accessory)....................7
2.3 Radio Performance..................................8
2.4 Current Consumption.............................11
2.5 Operation Time ......................................11
2.6 RSSI Bar................................................11
2.7 Battery Bar.............................................12
2.8 BACKUP BATTERY : Over 50 hours ....12
2.9 Sound Level...........................................12
3. RF TECHNICAL BRIEF...................13
3.1 MSM6260 ( Block Diagram)...................13
3.2 RF Block Diagram..................................14
3.3 Memory..................................................15
3.4 Camera & LCD Interface........................16
3.5 Interface USB,UART,SIM,JTAG ............17
3.6 Peripheral...............................................18
3.7 Audio Block Diagram .............................19
3.8 Digital Baseband(DBB/MSM6260).........20
3.9 Subsystem(MSM6260) ..........................23
3.10 Power Block.........................................30
3.11 External memory interface...................35
3.12 H/W Sub System..................................36
3.13 Main Features......................................53
4. TROUBLE SHOOTING ...................57
4.1 RF Component.......................................57
4.2 Checking VCXO Block...........................61
4.3 Checking Ant. SW Module Block ...........63
4.4 Checking UMTS Block...........................66
4.5 Checking GSM Block.............................73
4.6 Power ON Troubleshooting....................79
4.7 Charger Troubleshooting
(TA Charging) ........................................81
4.8 Charger Troubleshooting
(USB Charging)......................................84
4.9 USB Troubleshooting.............................87
4.10 SIM Detect Troubleshooting ................89
4.11 Camera Troubleshooting .....................91
4.12 Keypad Backlight Troubleshooting ......92
4.13 Folder ON/OFF Troubleshooting .........93
4.14 Main LCD Troubleshooting ..................94
4.15 Receiver Path ......................................95
4.16 Headset path........................................97
4.17 Speaker phone path.............................99
4.18 Main microphone ...............................101
4.19 Headset microphone..........................103
5. DOWNLOAD .................................105
5.1 Introduction ..........................................105
5.2 Downloading Procedure.......................105
5.3 Troubleshooting Download Errors .......119
5.4 Caution.................................................126
6. BLOCK DIAGRAM ........................127
6.1 CU575 Block Diagram .........................127
7. Circuit Diagram ............................129
8. BGA ...............................................139
9. PCB LAYOUT................................143
10. Calibration & RF Auto Test
Program ......................................147
9.1 Configuration of HOT KIMCHI .............147
9.2 How to use HOT KIMCHI.....................151
9.3 Example for using HOT KIMCHI..........152
11. EXPLODED VIEW &
REPLACEMENT PART LIST ..... 155
11.1 EXPLODED VIEW ............................ 155
11.2 Replacement Parts
<Mechanic component>.................... 157
<Main component> ........................... 160
11.3 Accessory ......................................... 178
Table Of Contents
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 3
- 4 -
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 4
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
Page 5
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 -
Page 6
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
2. PERFORMANCE
- 7 -
2.1 System Specification
2.2 Using Condition (Accessory)
1) Maximum Using Condition (Using Environment)
2. PERFORMANCE
Item Type / Spec.
1. Type Dual_LCD_Color Folder
2. Size 98.9 x 51 x 16.9 mm
3. Weight 102.5g, (with 970mA Battery)
4. Battery 970 mAh (Li-Polymer)
5. LCD Type TFT Main LCD(2.2’, 176 x 220), TFT Sub LCD(1.3’ 128 X160)
6. Accessory
1)Travel Adaptor 1) Input : AC 100~240V , Output : 5.1V,700mA
2)Ear-Mic Adaptor 2) ELA (option)
3)Data Cable 3) USB data cable (option)
Item Specification
Available AC Input Power AC : 240V Max
Available DC Input Power 12 V Max
Storage Temperature -20 ~ +70 °C
Page 7
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
2) General Using Condition
2.3 Radio Performance
1) Transmitter-GSM Mode
2. PERFORMANCE
- 8 -
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
GSM850/EGSM : 0.1 ppm
DCS/PCS : 0.1 ppm
EMC(Radiated Spurious Emission
GSM850/EGSM/DCS/PCS : < -28dBm
Disturbance)
Transmitter Output power and Burst Timing
GSM850/EGSM : 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
GSM850/EGSM :
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/PCS :
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
Page 8
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
2. PERFORMANCE
- 9 -
- Frequency Range : GSM850(824~849MHz/869~894MHz), EGSM(880~915MHz/925~960MHz)
DCS(1710~1785MHz/1805~1880MHz), PCS (1850~1910MHz/1930~1990MHz)
- Oscillator Frequency Range : 1688 ~ 1736 MHz
- Intermediate Frequency : None
- Normal Maximum Output Power : 1995.3 mW(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
Page 9
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3)Receiver - WCDMA Mode
2. PERFORMANCE
- 10 -
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) & I
oac
= -52 dBm / 3.84 MHz @ ±5 MHz
BER < 0.001 when Îor= -103.7 dBm / 3.84 MHz
Blocking Characteristic & I
blocking
= -56 dBm / 3.84 MHz @ Fuw(offset) = ±10 MHz
or I
blocking
= -44 dBm / 3.84 MHz @ Fuw(offset) = ±15 MHz
Spurious Response BER < 0.001 when Îor= -103.7 dBm / 3.84 MHz & I
blocking
= -44 dBm
BER < 0.001 when Îor= -103.7 dBm / 3.84 MHz
Intermodulation & I
ouw1
= -46 dBm @ F
uw1
(offset) = 10 MHz
& I
ouw2
= -46 dBm / 3.84 MHz @ F
uw2
(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
Page 10
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
2. PERFORMANCE
- 11 -
2.4 Current Consumption
2.5 Operation Time
2.6 RSSI Bar
WCDMA Only GSM Only
Sleep Mode 1.5mA(sleep current) ↓ 1.5mA(sleep current) ↓
Standby 3.8mA(DRX=1.28sec) ↓ 3.8mA(PM=6) ↓
Talk Mode
VC 13dBm
323 mA (Tx Lvl:5)
(low power mode) : 323 mA↓
NO SVC Mode TBD TBD
Power Off 300µA ↓ 300µA ↓
(Backup Battery Charging) 500µA ↓ 500µA ↓
Level Change WCDMA GSM
1) BAR 5 -82 ± 2 dBm -85 ± 2 dBm
2) BAR 5 → 4 -82 ± 2 dBm -85 ± 2 dBm
3) BAR 4 → 3 -87 ± 2 dBm -90 ± 2 dBm
4) BAR 3 → 2 -92 ± 2 dBm -95 ± 2 dBm
5) BAR 2 → 1 -95 ± 2 dBm -100 ± 2 dBm
6) BAR 1 →0 -98 ± 2 dBm -105 ± 2 dBm
Stand by Voice Call VT
250 hours ↑ = 3.8mA 180 mins ↑ = 323mA
WCDMA ↓↓
Only (970mAh battery, (970mAh battery,
/
DRX cycle = 1.28) TX = 12dBm)
250 hours ↑ = 3.8mA 180 mins ↑ = 323mA
GSM ↓↓
Only (970mAh battery, (970mAh battery,
/
Paging frame class6) TX = Level 5)
Page 11
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
2.7 Battery Bar
2.8 BACKUP BATTERY : Over 50 hours
(When Normal POWER OFF/EMERGENCY OFF)
2.9 Sound Level
Key Tone
1) Standby :
a) Speaker : 70~120dBspl (When 30cm distance, Maximum Tone)
b) Headset : 70~100dBspl
c) Warning Tone : 70~120dBspl (When 30cm distance, Maximum Tone)
2) Talk :
a) Speaker : 70 ~ 100dBspl
b) Headset : 70 ~ 100dBspl (Key Tone (In Calling) 100dBspl under)
c) Warning Tone : 70~100dBspl (When 30cm distance, Maximum Tone)
2. PERFORMANCE
- 12 -
Indication Standby
Bar3 3.75 ± 0.05V
Bar 3 → 2 3.75 ± 0.05V
Bar 2 → 1 3.66 ± 0.05V
Bar 1 → Empty 3.58 ± 0.05V
Low Voltage, Warning message+ 3.51 ± 0.05V (Stand-by) / 3.58 ± 0.05V (Talk)
Blinking [Interval : 3min(Stand-by) / 1min(Talk)]
Power Off 3.28 ± 0.05V
Page 12
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TECHNICAL BRIEF
- 13 -
3.1 MSM6260 ( Block Diagram)
3. TECHNICAL BRIEF
MSM6260
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 1.3M
KEY
PAD
I/O Conn
USB
NAND Flash
1G
SDRAM
512M
LCD
(2.2inch)
PM6650
GSM/GPRS/EDGE
processor
JTAG
RF SBI
GPIO
USIM
Page 13
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3.2 RF Block Diagram
3. TECHNICAL BRIEF
- 14 -
FRONT
END
MODULE
SP8T
WCDMA 850
DUPLEXER
Coupler
WCDMA 1900
DUPLEXER
Coupler
UMTS RF
GSM RF
GSM
QUAD PA
BLUETOOTH RF
WCDMA
Dual PA
GCELL/EGSM
DCS/PCS
TX SAW
FILTER
TX SAW
FILTER
TX SAW
FILTER
-LB_LNA_IN
-HB_LNA_IN
LB_LNA_OUT-
LB_INP-
RX SAW
FILTER
-LB_RF_OUT2
-HB_RF_OUT1
-PWD_DET_IN
-GCELL_INP
-GCELL_INN
-EGSM_INP
-EGSM_INN
-DCS_INP
-DCS_INN
-GPCS_INP
-GPCS_INN
-LB_RF_OUT1
-HB_RF_OUT2
BLUETOOTH RF MODULE
RFR6275
HB_LNA_OUT
-
LB_INM-
RX SAW
FILTER
RTR6275
BT_SBST/CK/DT
HB_INM-
HB_INP-
Loop
filter
-V_TUNE2
TCXO
PLL2
TCXO
BT_RX_TX_N
BT_DATA
UMTS_CP_OUT-
PLL
-V_TUNE1
PLL1
TCXO
PM6650
VCTCXO
19.2MHz
TCXO
VCONTROL-
DAC_REF -
RX_IQ -
SSBI -
SBDT -
SBDT -
RF_ON -
RX_IQ -
TX_IQ -
-RX_IQ
- SSBDT_RFR
-PM_SBDT
-TCXO
-TCXO_EN
-TRK_LO_ADJ
MSM6260
-TX_AGC_ADJ
-SSBDT_RTR
-TX_ON
-TX_IQ
-DAC_REF
BT_SBST/CK/DT
BT_RX_TX_N
BT_DATA
Page 14
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TECHNICAL BRIEF
- 15 -
3.3 Memory
PMIC
MSM6260
SDRAM
512Mb
(64MB)
NAND
1Gb
(128MB)
DATA[31:0]
ADDRESS[14:0]
DATA [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
USIM
SIM_RESET
SIM_IO
SIM_CLK
EBI1 EBI2
TFLASH
TFLASH_CMD
TFLASH_DATA
TFLASH_CLK
TFLASH_DECT_N
Page 15
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3.4 Camera & LCD Interface
3. TECHNICAL BRIEF
- 16 -
CAM_RESET
CAM_PWDN
VREG_CAM_2.7V
VREG_CAM_1.8V
IOVDD_2.8V (MSMP)
1.3M
Camera
I2C_SCL
I2C_SDA
CAM_MCLK
CAM_PCLK
CAM_VSYNC
CAM_HSYNC
CAM_DATA[7:0]
MSM6260
VREG_LCD_2.8V
LCD_RESET_N
EBI2_WE_N
LCD_ADS
LCD_IF_MODE
EBI2_DATA[15:0]
LCD_CS_N
SUB_LCD_CS_N
M_LCD 2.2'
TFT(QCIF)
S_LCD 1.3'
TFT(QQVGA)
Page 16
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TECHNICAL BRIEF
- 17 -
3.5 Interface USB,UART,SIM,JTAG
USB
MSM6260
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
Page 17
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3.6 Peripheral
3. TECHNICAL BRIEF
- 18 -
+VPWR
MAIN KEYPAD backlight
Remote PWR ON (Recep)
JTAG CON, UART,USB
Motor
MOTOR_PWR
USB (Recep)
USIM
PA_THERM
PM_ON_SW_N
KYPD_DRV_N
VIB_DRV_N
GP1_DRV_N
USB_D+, D-, VBUS
RUIM_IO ,CLK,
RST_N
USB_D+,D-,VBUS
TCXO
(19.2MHz)
PM6650-2
LED,Motor
USB Trans
AMUX_IN1
AMUX_IN2
USIM Level
Xtal:sleep
(32.768kHz)
Driver
Trans
SBI
TRST_N, TCK, TMS, TD I, TDO, RTCK
RESET_IN_N
PS_HOLD
TCXO_EN
BUFF_TCXO
SLEEP_CLK
PM_INT_N
USB_DAT, SE0 , OE_N
AMUX_OUT
VBAT_SENSE
TTY_ADC_DET
REF_ADC
VBAT_TEMP
RUIM_M_IO, CLK, RST_N
SSBDT_PM
UART TX/RX
Xtal:USB
(48MHz)
MSM6260
USB
HKADC0
HKADC1
ADC
HKADC3
HKADC4
HKADC5
UART2 (USIM)
UART3 (PM_SBI)
UART1 (IrDA)
JTAG
TFLASH_DET_N
SDCC_CMD
SDCC_DATA
SDCC_CLK
FOLDER_DET_N
KEY_ROW(0:4)
KEY_COL(0:5)
HOOK_SENSE
EAR_SENSE_N
TTY_ADC_DET
+VPWR
BACKLIGHT_CTRL
TFLASH
Hall Sensor
KEY
EAR JACK
Charge Pump
Charge Pump
Page 18
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TECHNICAL BRIEF
- 19 -
3.7 Audio Block Diagram
MSM6260
AMP
TPA2010D
SPK_AMP_EN
AMP_N
AMP_P
Loud SPEAKER
18x13 ,3.7T
8ohm, 0.8W
EAR JACK
4 Pole(
18 PIN MMI)
MIC
4Pie, 1.5T
-42dB +/-3dB
AMP_SPK+
AMP_SPK-
HPH_L
HPH_R
TTY_ADC_DET
HOOK_SENSE
MIC2P
MIC1P
MIC1N
MICBIAS
RCV+
RCV-
EAR_SENSE_N
VREG_MSMP_2.7V
NLA5223B
(Analog
Switch)
SPK+
SPK-
Page 19
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3.8 Digital Baseband(DBB/MSM6260)
3.8.1 General Description
A. Features(MSM6260)
• Support for multimode operation - HSDPA, tri-band WCDMA (UMTS), quad GSM/GPRS/EDGE,
and GPS.
• Support for HSDPA downlink up to 3.6 Mbps
• Support for WCDMA (UMTS) uplink data rate up to 384 kbps
• High-performance ARM926EJ-S running at up to 270 MHz for 3.6 Mbps HSDPA
• ARM Jazelle Java hardware acceleration for faster Java-based games and other applets
• QDSP4000 high-performance DSP cores
• Integrated gpsOne position location technology functionality
• Integrated Bluetooth 1.2 baseband processor for wireless connectivity to peripherals
• Qcamera with 30 fps QCIF viewfinder resolution, and support for 3 MP camera sensors
• Direct interface to digital camera module with video front end (VFE) image processing
• True 3D graphics for advanced wireless gaming
• SecureMSM v2.0 includes support for Open Mobile Alliance (OMA) DRM v2.0, SIM-lock and IMEI
integrity. Support for Qfuse.
• Audio on par with portable music players
• Vocoder support (AMR, FR, EFR, HR)
• Advanced 14 x 14 mm, 0.5-mm pitch, 409-pin lead-free CSP packaging technology
• SD/SDIO hardware support
3. TECHNICAL BRIEF
- 20 -
3. BB Technical Description
Page 20
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TECHNICAL BRIEF
- 21 -
GSM Tx/Rx
Figure. Simplified Block Diagram
SPDT
FEM (SWPlexer + GSM_RX_SAW)
1800/1900
850/900
850
Coupler
Duplexer
1900
Coupler
Duplexer
GSM
PAM
GSM 850 Rx
GSM 900 Rx
GSM 1800 Rx
GSM 1900 Rx
WCDMA
Tx/Rx
WCDMA
PAM
TX_SAW
900
TX_SAW
TX_SAW
GSM-VCO
RTR6275
W-VCO
HDET
I/
Q
MSM6260
S
S
BI
SXGA
TPA2
010
TFLA
SH
LCD
(2.2î QCIF)
NAND 1G
SDRAM
512M
Receiver
MIC
SPE
AKE
R
Stereo Headset
LNA
1900
RX_SAW
RFR6275
LNA
850
RX_SAW
W-VCO
S
S
BI
Bluetooth
Power
S
S
BI
PM
USIM
USB
6650
+5V
Page 21
- 22 -
3. TECHNICAL BRIEF
3.8.2 Block Diagram(MSM6260)
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
MSM6260
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
1.3M
KEY
PAD
I/O Conn
USB
NAND Flash
1G
SDRAM
512M
LCD
(2.2inch)
PM6650
GSM/GPRS/EDGE
processor
JTAG
RF SBI
GPIO
USIM
Figure. Simplified Block Diagram of MSM6260
Page 22
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TECHNICAL BRIEF
- 23 -
3.9 Subsystem(MSM6260)
3.9.1 ARM Microprocessor Subsystem
The MSM6260 device uses an embedded ARM926EJ-S microprocessor. This microprocessor,
through the system software, controls most of the functionality for the MSM, including control of the
external peripherals such as the keypad, LCD, SDRAM, and NAND-Flash devices. Through a
QUALCOMM proprietary serial bus interface (SBI) the ARM926EJ-S configures and controls the
functionality of the RTR6275, RFR6275 and PM6650 devices.
3.9.2 WCDMA R99 features
The MSM6260 device supports the W-CDMA FDD release 99, including the following features:
■ All modes and data rates for W-CDMA frequency division duplex (FDD), with the following
restrictions:
❏ The downlink supports the following specifications:
• Up to four physical channels, including the broadcast channel (BCH), if present
• Up to three dedicated physical channels (DPCHs)
• Spreading factor (SF) range support from 4 to 256
• The following transmit diversity modes are supported:
Space time transmit diversity (STTD)
Time-switched transmit diversity (TSTD)
Closed-loop feedback transmit diversity (CLTD)
■ The uplink supports the following specifications:
❏ The uplink provides the following UE support:
• One physical channel, eight TrCH, and 16 TrBks starting at any frame boundary
• A maximum data rate of 384 kbps
❏ Full SF range support from 4 to 256
■ SMS (CS and PS)
■ PS data rate - 384 kbps DL / 384 kbps UL
■ CS data rate - 64 kbps DL / 64 kbps UL
■ AMR (all rates)
3.9.3 GSM features
The following GSM modes and data rates are supported by the MSM6260 device hardware.
Support modes conform to release '99 specifications of the sub-feature.
■ Voice features
❏ FR
❏ EFR
❏ AMR
❏ HR
❏ A5/1, A5/2, and A5/3 ciphering
Page 23
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
■ Circuit-switched data features
❏ 9.6k
❏ 14.4k
❏ Fax
❏ Transparent and non-transparent modes for CS data and fax
❏ No sub-rates are supported.
3.9.4 GPRS features
■ Packet switched data (GPRS)
❏ DTM (Simple Class A) operation
❏ Multi-slot class 12 data services
❏ CS schemes: CS1, CS2, CS3, and CS4
❏ GEA1, GEA2, and GEA3 ciphering
■ Maximum of four Rx timeslots per frame
3.9.5 EDGE features
■ EDGE E2 power class for 8 PSK
■ DTM (simple Class A), multi-slot class 12
■ Downlink coding schemes - CS 1-4, MCS 1-9
■ Uplink coding schemes - CS 1-4, MCS 1-9
■ BEP reporting
■ SRB loopback and test mode B
■ 8-bit, 11-bit RACH
■ PBCCH support
■ 1 phase/2 phase access procedures
■ Link adaptation and IR
■ NACC, extended UL TBF.
3.9.6 MSM6260 device audio processing features
■ Integrated wideband stereo CODEC
❏ 16-bit DAC with typical 88 dB dynamic range
❏ Supports sampling rates up to 48 kHz on the speaker path and 16 kHz on the microphone path
■ VR- Voice mail + voice memo
■ Acoustic echo cancellation
■ Audio AGC
■ Audio Codecs: AMR-NB, AAC, AAC Plus, Enhanced AAC Plus, Windows Audio v9, Real Audio 8
(G2)
■ Internal vocoder supporting AMR, FR, EFR, and HR
3. TECHNICAL BRIEF
- 24 -
Page 24
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TECHNICAL BRIEF
- 25 -
3.9.7 MSM6260 microprocessor subsystem
■ Industry standard ARM926EJ-S embedded microprocessor subsystem
❏ 16 kB instruction and 16 kB data cache
❏ Instruction set compatible with ARM7TDMI®
❏ ARM version 5TEJ instructions
❏ Higher performance 5 stage pipeline, Harvard cached architecture
❏ Higher internal CPU clock rate with on-chip cache
■ Java hardware acceleration
■ Enhanced memory support
■ 75 MHz and 90 MHz bus clock for SDRAM
■ 32-bit SDRAM
■ Dual memory buses separating the high-speed memory subsystem (EBI1) from low-speed
peripherals (EBI2) such as LCD panels
■ 1.8 V memory interface support for EBI1 and 1.8V or 2.6V memory interface support for EBI2
■ NAND FLASH memory interface
❏ 8/16-bit data I/O width NAND flash support
❏ 1- or 4-bit ECC
❏ 512-byte/2KB page-size support
❏ 2 chip selects supported for NAND Flash
❏ Boot from NAND
❏ Low-power SDRAM (LP-SDRAM) interface
■ Internal watchdog and sleep timers
3.9.8 Supported interface features
■ USB On-the-Go core supports both slave and host functionality
■ Three universal asynchronous receiver transmitter (UART) serial ports
■ USIM controller (via UART)
■ Integrated 4-bit secure digital (SD) controller for SD and Mini SD cards
■ Parallel LCD interface
■ General-purpose I/O pins
■ External keypad interface
3.9.9 Supported multimedia features
■ Provide additional general purpose MIPS by using:
❏ Two QDSP4000s
❏ Dedicated hardware accelerators and compression engines
■ Improve Java, BREW, and game performance
❏ Integrated Java and 2D/3D graphics accelerator with Sprite engine
■ Enable various accessories via USB host connectivity.
❏ Integrated USB host controller functionality
■ Enable compelling visual and audio applications.
Page 25
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Qcamera
TM
■ High-quality digital camera processing, supporting CCD or CMOS image sensors up to 3 MP
■ 30 fps QCIF viewfinder
Qtv
TM
■ Audio and video decoder that supports VOD, MOD and Broadcast multimedia services.
■ Audio CODECs supported: AMR-NB, AAC, AAC Plus, Enhanced AAC Plus, Windows® Audio v9,
RealAudio® v8
■ Integrated stereo wideband Codec for music/digital clips
■ CMX
■ Video Codecs supported: MPEG-4, H.263, H.264, Windows Media® v9 and RealNetworks® v10
Video telephony services: Qvideophone
TM
■ A two-way mobile video conferencing solution that delivers 15 fps @ QCIF, 64kbps
■ Video CODECs supported: MPEG-4 and H.263
■ Audio CODECs supported: AMR-NB.
Qcamcorder
TM
■ Real time mobile video encoder
■ Video CODECs supported: MPEG-4, H.263
■ Audio CODECs supported: AMR-NB
■ Recording performance: 15 fps @ QCIF, 192 kbps
■ Video telephony at 15 frames per second(fps), QCIF resolution video encode at 15 fps at QCIF for
camcorder capability
■ Video decode at 15 fps at QCIF resolution, streaming or offline
gpsOne
TM
■ Integrated gpsOne processing
■ Standalone gpsOne mode in which the handset acts as a GPS receiver
CMX
TM
(MIDI and still image, animation, text, LED/vibrate support)
■ 72 simultaneous polyphonic tones
■ 44 kHz sampling rate
■ 512 kB wave table
■ Support of universal file formats
❏ Standard MIDI Format (SMF)
❏ SP-MIDI
❏ SMAF® Audio playback (MA-2, MA-3, MA-5)
❏ XMF/DLS
❏ MFil (requires Docomo license)
3. TECHNICAL BRIEF
- 26 -
Page 26
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TECHNICAL BRIEF
- 27 -
■ PNG decoder
■ Pitch bend range support
■ LED/vibrate support
■ Scalable Vector Graphics (SVG- Tiny 1.1 + SVG Tiny 1.2)
■ MLZ decoder
■ Integrated PNG/SAF A.T.
Features MSM6260
Modem Tri-band WCDMA
Quad-band GSM/GPRAS/EDGE
HEDGE
3.6 Mbps HSDPA
GPS
DTM
Processor ARM926 EJ-S-270 MHz
AHB-90 MHz for 3.6 Mbps HSDPA
ARM926 EJ-S-225 MHz
AHB-75 MHz for no HSDPA
ARM926 EJ-S-122 MHz
AHB-61 MHz for no HSDPA and limited
multimedia
QDSP-100 MHz
Process technology 65nm
Supported RF platforms Platform B (RTR6275+RFR6275)
(see Description of RF configurations Platform E (RTR6275+RFR6275)
for platform definition) Platform F (RTR6285+receive diversity)
HSDPA 3.6 Mbps, category 5/6
Enhanced antenna SAIC, equalizer, receive diversity
Memory configuration 8/16-bit NAND and 32-bit SDRAM (See Note 2)
Boradcast interface Not supported
Power management IC PMIC 6650-2
USB 3-wire USB-OTG
MDDI Supported
Qcamera (camera interface) Up to 3.0 M pixel support
Viewfinder frame rate 30 fps @ QCIF
QTv (video decode) MP3, AAC, AAC+, ADPCM, MPEG4, H.263,
H.264, Real networks, Windows media, WB-AMR/+
Qvideophone (video telehony) 15 fps @ QCIF
LCD HW interface Up to 24 bpp
Boot mode Trusted boot mode only
Table. Summary of MSM6260 device features
Page 27
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3.9.10 Serial Bus Interface(SBI)
The MSM6260 device’s SSBI is designed specifically to be a quick, low pin count control protocol for
QUALCOMM’s RTR6275, RFR6275 and PM6650 ASICs. Using the SSBI, the RTR6275, RFR6275, and
PM6650 devices can be configured for different operating modes and for minimum power consumption,
extending battery life in Standby mode. The SSBI also controls DC baseband offset errors.
3.9.11 Wideband CODEC
The MSM6260 device integrates a wideband voice/audio CODEC into the mobile station modem
(MSM). The CODEC supports two differential microphone inputs, one differential earphone output, one
single-ended earphone output, and a differential analog auxiliary interface.
The CODEC integrates the microphone and earphone amplifiers into the MSM6260 device, reducing
the external component count to just a few passive components. The microphone (Tx) audio path
consists of a two-stage amplifier with the gain of the second stage set interally. The Rx/Tx paths are
designed to meet the ITU-G.712 requirements for digital transmission systems.
3.9.12 Vocoder Subsystem
The MSM6260 device’s QDSP4000 supports AMR,FR,EFR and HR. In addition, the QDSP4000 has
modules to support the following audio functions: DTMF tone generation, DTMF tone detection, Tx/Rx
volume controls, Tx/Rx automatic gain control (AGC), Rx Automatic Volume Control (AVC), EarSeal
Echo Canceller (ESEC), Acoustic Echo Canceller (AEC), Noise Suppression (NS), and programmable,
13-tap, Type-I, FIR, Tx/Rx compensation filters. The MSM6260 device’s integrated ARM9TDMI
processor downloads the firmware into the QDSP4000 and configures QDSP4000 to support the
desired functionality.
3.9.13 ARM Microprocessor subsystem
The MSM6260 device uses an embedded ARM926EJ-S microprocessor. This microprocessor,
through the system software, controls most of the functionality for the MSM device, including control of
the external peripherals such as the keypad, LCD, RAM, ROM, and EEPROM devices.
Through a generic single serial bus interface (SSBI) the ARM926EJ-S configures and controls the
functionality of the RFR6275, RTR6275, and PM6650 devices.
3.9.14 Mode Select and JTAG Interfaces
The mode pins to the MSM6260 device determine the overall operating mode of the ASIC. The options
under the control of the mode inputs are Native mode, which is the normal subscriber unit operation,
ETM mode, which enables the built-in trace mode, and test mode for factory testing.
The MSM6260 device meets the intent of the ANSI/IEEE 1149.1A-1993 feature list. The JTAG
interface can be used to test digital interconnects between devices within the mobile station during
manufacture.
3. TECHNICAL BRIEF
- 28 -
Page 28
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TECHNICAL BRIEF
- 29 -
3.9.15 General-Purpose Input/Output Interface
The MSM6260 device has general-purpose bidirectional input/output pins. Some of the GPIO pins
have alternate functions supported on them. The alternate functions include USB interface, additional
RAM, ROM, general-purpose chip selects, parallel LCD interface, and a UART interface. The function
of these pins is documented in the various software releases.
3.9.16 UART
The MSM6260 device employs three UARTs. UART1 has dedicated pins while UART2 and UART3
share multiplexed pins.
■ UART1 for data
■ UART2 (can be used for USIM interface)
■ UART3 for data
3.9.17 USB
The MSM6260 device integrates a universal serial bus (USB) controller that supports both
unidirectional and bidirectional transceiver interfaces. The USB controller acts as a USB peripheral
communicating with the USB host.
Page 29
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3.10 Power Block
3.10.1 General
MSM6260, included RF, is fully covered by PM6650(Qualcomm PMIC). PM6650 cover the power of
MSM6260, MSM memory, RF block, Bluetooth, Micro SD, USIM and TCXO.
Major power components are :
PM6650(U701) : Phone power supply
AAT3152IWP(U401) : LCD Backlight charge pump
BH28FB1WHFV(U402) : LCD LDO
MIC2211-LGYML(U404) : Camera dual LDO
3.10.2 PM6650
The PM6650 device (Figure 1-1) integrates all wireless handset power management. The power
management portion accepts power from all the most common sources - battery, external charger,
adapter, coin cell back-up - and generates all the regulated voltages needed to power the appropriate
handset electronics. It monitors and controls the power sources, detecting which sources are applied,
verifying that they are within acceptable operational limits, and coordinates battery and coin cell
recharging while maintaining the handset electronics supply voltages. Eight programmable output
voltages are generated using low dropout voltage regulators, all derived from a common trimmed
voltage reference.
A dedicated controller manages the TCXO warm-up and signal buffering, and key parameters (undervoltage lockout and crystal oscillator signal presence) are monitored to protect against detrimental
conditions. MSM device controls and statuses the PM6650 IC using Single Serial Bus Interface (SSBI)
supplemented by an Interrupt Manager for time-critical information. Another dedicated IC Interface
circuit monitors multiple trigger events and controls the power-on sequence.
3. TECHNICAL BRIEF
- 30 -
Page 30
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TECHNICAL BRIEF
- 31 -
Figure. PM6650 Functional Block Diagram
Page 31
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3.10.3 Charging control
A programmable charging block in PM6650 is used for battery charging. It is possible to set limits for
the charging current. The external supply typically connects directly to pin (VCHG). The voltage on this
pin (VCHG) is monitored by detection circuitry to ascertain whether a valid external supply is applied or
not. For additional accuracy or to capture variations over time, this voltage is routed internally to the
housekeeping ADC via the analog multiplexer. PM6650 circuits monitor voltages at VCHARGER and
ICHARGE pins to determine which supply should be used and when to switch between the two
supplies. These pins are connected to the Source (or emitter) and Drain (or collector) contacts of the
pass transistor respectively.
3. TECHNICAL BRIEF
- 32 -
CU575 Battery Bar Display(Stand By Condition)
3.75 0.05V
±
±
3.66 0.05V 3.58 0.05V
±
±
3.51 0.05V
Page 32
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TECHNICAL BRIEF
- 33 -
Trickle Charging
Trickle Charging of the main battery, enabled through SBI control and powered from VDD, is provided
by the PM6650 IC, The trickle charger is on-chip programmable current source that supplies current
from VDDto pin (VBAT). Trickle charging can be used for lithium-ion and nickel-based batteries, with its
performance specified below (3.2V). The charging current is set to 80mA.
Parameter Min Typ Max Unit
Trickle Current 60 80 100 mA
Page 33
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Constant Current Charging
The PM6650 IC supports constant current charging of the main battery by controlling the charger pass
transistor and the battery transistor. The constant current charging continues until the battery reaches
its target voltage, 4.2V.
Constant Voltage Charging
Constant voltage charging begins when the battery voltage reaches a target voltage, 4.2V.
The end of constant voltage charging is commonly detected 10% of the full charging current (110mA)
•
Charging Method : CC & CV (Constant Current & Constant Voltage)
•
Maximum Charging Voltage : 4.2V
•
Maximum Charging Current : 600mA
•
Nominal Battery Capacity : 970 mAh
•
Charger Voltage : 5.1V
•
Charging time : Max 3h (Except time trickle charging)
•
Full charge indication current (icon stop current) : 110mA
•
Low battery POP UP : Idle - 3.51V, Dedicated(GSM/WCDMA) - 3.58V
•
Low battery alarm interval : Idle - 3 min, Dedicated - 1min
•
Cut-off voltage : 3.28V
3. TECHNICAL BRIEF
- 34 -
Page 34
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TECHNICAL BRIEF
- 35 -
3.11 External memory interface
A. MSM6260
The MSM6260 device was designed to provide two distinct memory interfaces. EBI1 was targeted for
supporting high speed synchronous memory devices. EBI2 was targeted towards supporting slower
asynchronous devices such as LCD, NAND flash, SRAM, etc.
•
EBI1 Features
- 16 bit static and dynamic memory interface
- 32 bit dynamic memory interface
- 24 bits of address for static memory devices which can support up to 32MBytes on each chip
select
- Synchronous burst memories supported (burst NOR, burst PSRAM)
- Synchronous DRAM memories supported
- Byte addressable memory supporting 8 bit, 16 bit and 32 bit accesses
- Pseudo SRAM (PSRAM) memory support
•
EBI2 Features
- Support for asynchronous FLASH and SRAM(16bit & 8bit).
- Interface support for byte addressable 16bit devices(UB_N & LB_N signals).
- 2Mbytes of memory per chip select.
- Support for 8 bit/16bit wide NAND flash.
- Support for parallel LCD interfaces, port mapped of memory mapped(18 or 16 bit)
•
1Gb NAND(16bit) flash memory + 512Mb SDRAM (32bit)
•
1-CS(Chip Select) are used
Interface Spec
Device Part Name Maker Read Access Time Write Access Time
FLASH TY90009800J0GG Toshiba 50 ns 50 ns
SDRAM TY90009800J0GG Toshiba 15 ns 15 ns
Table#1. External memory interface for CU575
Page 35
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3.12 H/W Sub System
3.12.1 RF Interface
A. RTR6275(WCDMA_Tx, GSM_Tx/Rx)
MSM6260 controls RF part(RTR6275) using these signals.
• SBST : SSBI I/F signals for control Sub-chipset
• PA_ON1, PA_ON2 : Power AMP on RF part
• RX0_I/Q_M/P,TX_I/Q_M/P: I/Q for T/Rx of RF
• TX_AGC_ADJ : control the gain of the Tx signal prior to the power amplifier
3. TECHNICAL BRIEF
- 36 -
Figure. Schematic of RF Interface of MSM6260
W1900 PAM
W850 PAM
Close to MSM
2K R211
33nF C240
TP202
XMEM1_CS_N1_GPIO76
XMEM1_CS_N3_SDRAM1_CS_N1_GPIO77
Y6
W15
XMEM2_CS_N2_GPIO35
AA15
XMEM2_CS_N3_GPIO36
L25
UART3_RFR_N_GPIO87
USB_RX_DATA_GPIO29
N19
WDOG_STB_SBCK1_GPIO0
H25
AA1
A17
TMS
F15
TRK_LO_ADJ
L13
H15
TRST_N
H13
TX_AGC_ADJ
TX_ON_GRFC10
H12
H6
UART2_DP_RX_DATA_GPIO89
F18
SYNTH0_GP_PDM0_GPIO92
B6
SYNTH2_GPIO65
TCK
D16
TCXO_EN_GPIO94
F19
D15
TDI
TDO
SBDT1_GPIO1
SBST1_GPIO93
H18
AA25
Q_IM_CH0
Q_IM_CH1
W23
Y25
Q_IP_CH0
Q_IP_CH1
V23
B12
Q_OUT
A12
Q_OUT_N
RTCK
H16
F26
PA_ON0
F17
H11
PA_ON1_GPIO2
AB25
I_IM_CH0
V25
I_IM_CH1
AC25
I_IP_CH0
W25
I_IP_CH1
I_OUT
B13
I_OUT_N
A13
AE13
LCD_EN_GPIO37
GRFC5_AUX_SBST_GPIO8
GRFC7_GPIO10
T23
B4
GRFC8_GPIO11
D5
GRFC9_GPIO12
GRFX6_GPIO9
T19
GPIO66
H17
GP_PDM1_PA_RANGE0
D17
GP_PDM2_PA_RANGE1
B8
GRFC0_GPIO3
A8
GRFC1_AUX_SBDT_GPIO4
D9
GRFC2_GPIO5
F10
GRFC3_GPIO6
GRFC4_AUX_SBCK_GPIO7
H10
D11
A6
GPIO28
H9
GPIO43
F8
F12
DAC_REF
AUX_PCM_CLK_GRFC14_GPIO80
K19
N21
AUX_PCM_DIN_GRFC13_GPIO14
AUX_PCM_DOUT_GRFC12_GPIO103
G4
AUX_PCM_SYNC_GRFC11_GPIO102
J8
CAMCLK_PO_GP_MN_GPIO13
J21
CAM_LDO_EN
JTAG_TCK
VGA_CAM_RESET
TFLASH_DET_N
PA_ON2
PA_ON1
SPK_SW_ON
SPK_AMP_EN
ANT_SEL3
CAM_MCLK
GSM_SAW_SW_MODE
GSM_PA_BAND
GSM_PA_EN
PA_R0
LCD_RESET_N
LCD_IF_MODE
DAC_REF
TX_IM
TX_IP
RX_IP
RX_IM
ANT_SEL0
ANT_SEL2
ANT_SEL1
FOLDER_DETECT
HOOK_SENSE_N
TCXO_EN
JTAG_TDI
JTAG_TDO
JTAG_TMS
JTAG_TRST_N
TX_AGC_ADJ
TX_ON
CAM_PWDN
TRK_LO_ADJ
RX_QM
RX_QP
TX_QP
TX_QM
JTAG_RTCK
Page 36
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TECHNICAL BRIEF
- 37 -
B. RFR6275(WCDMA_Rx)
•
SBDT: SSBI I/F signals for control Sub-chipset
•
RX0_I/Q_M/P : I/Q for Rx of RF
C. the others
•
TRK_LO_ADJ : TCXO(19.2M) Control
•
PA_ON1 : WCDMA(850) TX Power Amp Enable
•
PA_ON2: WCDMA(1900) TX Power Amp Enable
•
ANT_SEL[0-3] : Ant Switch Module Mode Selection(WCDMA,GSM Tx/Rx,DCS-PCS Tx/Rx)
•
GSM_PA_BAND : GSM/DCS-PCS Band Selection of Power Amp
•
GSM_PA_RAMP : Power Amp Gain Control of APC_IC
•
GSM_PA_EN : Power Amp Gain Control Enable of APC_IC
•
GSM_SAW_SW_MODE: GSM SAW Filter Switch
Page 37
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3.12.2 MSM Sub System
3.12.2.1 USIM Interface
SIM interface scheme is shown in Figure.
And, there control signals are followed
•
USIM_CLK : USIM Clock
•
USIM_Reset : USIM Reset
•
USIM_Data : USIM Data T/Rx
3.12.2.2. UART Interface
UART signals are connected to MSM GPIO through IO connector with 115200 bps speed.
3. TECHNICAL BRIEF
- 38 -
Figure. SIM Interface
GPIO_Map Name Note
GPIO_96 UART_RXD Data_Rx
GPIO_95 UART_TXD Data_Tx
Table. UART Interface
VREG_UIM 2.85V
USIM CLK
MSM6260
USIM CLK
USIM Reset
USIM Data
PM6650
USIM Reset
USIM
USIM Data
Page 38
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TECHNICAL BRIEF
- 39 -
3.12.2.3. USB
The MSM6260 device contains a Universal Serial Bus (USB) interface to provide an efficient interconnect
between the mobile phone and a personal computer (PC). The USB interface of the MSM6260 was
designed to comply with the definition of a peripheral as specified in USB Specification, Revision 1.1.
Therefore, by definition, the USB interface is also compliant as a peripheral with the USB Specification,
Revision 2.0. The USB Specification Revision 1.1 defines two speeds of operation, namely low-speed (1.5
Mbps) and full-speed (12 Mbps), both of which are supported by the MSM6260.
Table. USB Signal Interface
Figure. Schematic of USB block(MSM6260Side & PM6650 Side)
Name Note
USB_DAT Data to/from MSM
USB_SE0 Data to/from MSM
USB_OE_N Out-Put Enable of Transceiver
USB_VBUS USB_Power From Host(PC)
USB_D+ USB Data+ to Host
USB_D- USB Data- to Host
USB_OE_N
USB_CNT_N
USB_VBUS
UART2_CTS_N_GPIO90
UART2_DP_TX_DATA_GPIO88
UART2_RFR_N_GPIO91
UART3_CTS_N_GPIO86
UART3_DP_RX_DATA_GPIO85
F4
G6
USIM_CLK
USIM_RST_N
UART3_DP_TX_DATA_GPIO84
E4
L23
M21
M19
USIM_DATA
VGA_CAM_PWDN
GPIO40
GPIO42
D6
D7
TP203
PS_HOLD
PM_INT_N
USB_DAT_VP
USB_OE_TP_N
USB_SE0_VM
N26
N25
N23
USB_SE0
USB_DAT
USB_OE_N
SBST
SBCK
SBDT
MMC_CLK_SDCC_CLK_GPIO31
MMC_CMD_GPIO30
MMC_DATA_SDCC_DAT0_GPIO32
J23
L21
L14
H26
H14
M16
SSBDT_RFR
SSBDT_RTR
SSBDT_PM
SDCC_CLK
SDCC_CMD
SDCC_DATA(0)
USB_DAT
USB_D+
USB_SE0
USB_D-
C722
1608
47KR711
4.7u
USB_OE_N
14
VSW_5V
15
USB_CTL_N
16
USB_VBUS
17
USB_DAT
18
USB_D_P
19
USB_SE0
20
USB_D_M
21
GP1_DRV_N(MPP7)
Page 39
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3.12.3 HKADC(House Keeping ADC)
The MSM6260 device has an on-chip 8-bit analog-to-digital converter (HKADC) which is tended to digitize
DC signals corresponding to analog parameters such as battery voltage, temperature, and RF power levels.
The MSM6260 device has six analog input pins which are multiplexed to the input of the internal HKADC.
3. TECHNICAL BRIEF
- 40 -
Figure. MSM6260HKADC Block diagram
Table. HKADC channel table
Channel Signal Note
HKADC0 AMUX_OUT
HKADC1 VBATT_SENSE Battery voltage level
HKADC2 No use
HKADC3 TTY_ADC_DET Ear jack Detection for TTY
HKADC4 PCB_Rev_ADC PCB Version Check
HKADC5 VBATT_TEMP Battery Temperature Check
Page 40
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TECHNICAL BRIEF
- 41 -
3.12.4 Key Pad
There are 24 buttons, 3 side keys and touch keys in Figure. Shows the Keypad circuit. ‘END’ Key is
connected On_SW to PMIC(PM6650).
Figure. Keypad Circuit
Table. Key Matrix Mapping Table
8
2
HOT3
0
3
45
7
#
6
STAR
9
1
KEY
MENU
HOT501
SND
502 503
OK
SEARCH
501
R509
100K
506
HOT502
508
R508
R507 100K
100K
R505 100K
UPLEFT
DN
CLR
510
505
509
504
SHARP
STAR
507
100KR506
RIGHT
KEY_ROW(1)
KEY_ROW(2)
KEY_ROW(3)
KEY_ROW(4)
KEY_COL(2)
KEY_COL(0)
KEY_COL(4)
KEY_COL(3)
VREG_MSMP_2.8V
KEY_COL(1)
KEY_ROW(0)
COL0 COL1 COL2 COL3 COL4 COL5
ROW0 Multi CLR MENU
Side
(up)
ROW1 1 2 3 LEFT UP
Side
(down)
ROW2 4 5 6 OK Right CAM
ROW3 7 8 9 SEND SEARCH
ROW4 * 0 # Down BACK
Page 41
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TECHNICAL BRIEF
- 42 -
Figure. Keypad Circuit (On switch, Side KEY and Touch key )
END
ON_SW
D603RB521S-30
VA611
EVL14K02200
END
RB521S-30
D602
ON_SW_N
PM_ON_SW_N
SIDE KEY
1
2
3
4
5
CON602
R821 470
R823 470
100ohmR601
VA604
ICVS0505500FR
R822 470
OUT102
KEY_COL(5)
KEY_ROW(0)
KEY_ROW(1)
KEY_ROW(2)
(Shild Flood)
C101
C1021u1u
SHLD
S11
9
S2
S3
10
11
S4
S5
12
S6
13
14
S7
S8
17
18
S9
1
SCL
24
SDA
SHLD
6
VDD
21
16
XCAP
_ATTN
2
GND0
15
22
GND1
5
GPIO0
GPIO1
4
3
GPIO2
NC4
23
PGND
25
7
S0
S1
8
S10
19
20
SO2810
U1
R106
2.7K
2.7K
R105
R104
2.7K
22
R103
SHLD
VREG_LCD_2.8V
SENSE_3
TOUCH_CLK
TOUCH_ACK
TOUCH_DAT
SENSE_1
SENSE_2
SENSE_4
Page 42
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TECHNICAL BRIEF
- 43 -
3.12.5 Camera Interface
CU575 Installed a 1.3M Pixel SXGA Camera.
Below figure shows the camera board to board connector and camera I/F signal.
1.3M
14-5602-024-000-829
9
16
17
18
19
2
20
21
22
23
24
3
4
5
6
7
8
1
10
11
1213
14
15
CN101
CAM_RESET
CAM_PCLK VREG_MSMP_2.8V
VREG_CAM_1.8V
I2C_SCL
I2C_SDA
CAM_VSYNC
CAM_HSYNC
CAM_MCLK
VREG_CAM_2.7V
CAM_DATA(0)
CAM_DATA(1)
CAM_DATA(2)
CAM_DATA(3)
CAM_DATA(4)
CAM_DATA(5)
CAM_DATA(6)
CAM_DATA(7)
CAM_PWDN
Page 43
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
The Camera module is connected to LCD FPCB with 24pin Board to Board connector. Its interface is
dedicated camera interface port in MSM6260. The camera port supply 24MHz master clock to camera
module and receive 48MHz pixel clock (15fps), vertical sync signal, horizontal sync signal, reset signal
and 8bits data from camera module. The camera module is controlled by I2C port from MSM6260.
3. TECHNICAL BRIEF
- 44 -
Table. Interface between Camera Module and LCD FPCB (in camera module)
Camera dataOCAM_DATA(4)20
Camera dataOCAM_DATA(3)19
Camera dataOCAM_DATA(2)18
Camera dataOCAM_DATA(1)17
Camera pixel clockOCAM_PCLK15
Camera dataOCAM_DATA(0)16
I2C dataII2C_SDA3
GND
GND
GND4
Vertical SynchOCAM_VSYNC5
Horizontal SyncOCAM_HSYNC6
Main clockICAM_MCLK7
GND
GND
GND8
Camera Analog powerIVREG_CAM_2.7V9
Camera I/O powerIVREG_MSMP_2.8V10
Camera resetICAM_RESET14
Camera power down(Enable)ICAM_PWDN13
GND
GND
GND12
Camera core powerIVREG_CAM_1.8V11
I2C clockII2C_CLK2
GND
GND
GND1
NotePortNameNo
GND
GND
GND24
Camera dataOCAM_DATA(7)23
Camera dataOCAM_DATA(6)22
Camera dataOCAM_DATA(5)21
Page 44
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TECHNICAL BRIEF
- 45 -
3.12.6 Folder ON/OFF Operation
There is a magnet to detect the Folder status, opened or closed.
If a magnet is close to the hall-effect switch, the voltage at pin OUT of U405 goes to 0V. Otherwise,
2.8V. This folder signal is delivered to MSM6260 GPIO92.
FOLDER_DETECT
NC
32
OUT
VDD1VSS
4
EM-0781-T5U405
33p
C826
120p C416
R408 100K
R407
62
VREG_MSMP_2.8V
FOLDER_DETECT
Figure. Schematic of Folder ON/OFF detection circuit
Page 45
- 46 -
3. TECHNICAL BRIEF
3.12.7 Keypad Light
There are 2 White LEDs in main board backlight circuit, which are driven by KPD_DRV_N line from
PM6650.
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
KEY_BACK_LIGHT
EVL14K02200
VA501
R502
100ohm
100ohm
R501
LD501 LEWW-S47-PA
LEWW-S47-PA
LD502
KYBD_BACKLIGHT
+VPWR
Figure. Keypad Backlight Circuit
Page 46
- 47 -
3. TECHNICAL BRIEF
3.12.8 LCD Module (NM220CT2 : Tovis)
- The NM220CT2 model is a Color TFT Main and TFT Sub LCD supplied by TOVIS. This main
Module has a 2.2 inch diagonally measured active display area with 176(RGB)X220 resolution and
sub Module has a 1.3 inch diagonally measured active display area with 128(RGB)X160
resolution. In case of Main LCD, each pixel is divided into Red, Green and Blue sub-pixels and
dots which are arranged in vertical stripes.
• Features
- Display mode(Main LCD) : Normally White, Transmissive TN mode 65K colors
- Display mode(Sub LCD) : Normally White, Transmissive TN mode 65K colors
- LCD Driver IC: S1D19501(Main LCD,EPSON), R61502B(Sub LCD, Renesas)
- Driving Method : A-Si TFT Active Matrix
- 16 bit CPU interface Parallel
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Figure. LCD Module Block Diagram
Page 47
- 48 -
3. TECHNICAL BRIEF
3.12.9 Display & LCD FPC Interface
LCD module is connected to LCD FPCB with 40 pins B TO B connector. The LCD module is controlled
by 16-bit EBI2 in MSM6260
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LCD
14-5805-040-000-829
6
7
8
9
28
29
3
30
31
32
33
34
35
36
37
38
39
4
40
5
13
14
15
16
17
18
19
2
2021
22
23
24
25
26
27
CN102
G1G2
G3G4
1
10
11
12
EBI2_DATA(12)
EBI2_DATA(13)
EBI2_DATA(14)
EBI2_DATA(15)
LCD_IF_MODE
VREG_LCD_2.8V
LCD_MAKER_ID
EBI2_OE_N
EBI2_WE_N
LCD_CS_N
LCD_ADS
EBI2_DATA(8)
EBI2_DATA(9)
EBI2_DATA(10)
EBI2_DATA(11)
EBI2_DATA(5)
EBI2_DATA(6)
EBI2_DATA(7)
WLED_PWR
WLED_1
WLED_2
WLED_3
WLED_4
LCD_RESET_N
EBI2_DATA(0)
EBI2_DATA(1)
EBI2_DATA(2)
EBI2_DATA(3)
EBI2_DATA(4)
SUB_CS_N
Page 48
- 49 -
3. TECHNICAL BRIEF
3.12.9.1 Audio Signal Processing & Interface
Audio signal processing is divided uplink path and downlink path. The uplink path amplifies the audio
signal from MIC and converts this analog signal to digital signal and then transmits it to DBB Chip
(MSM6260).
This transmitted signal is reformed to fit in GSM & WCDMA frame format and delivered to RF Chipset.
The downlink path amplifies the signal from DBB chip (MSM6260) and outputs it to receiver (or
speaker). The receive path can be directed to either one of two earphone amplifiers or the auxiliary
output. The outputs earphone1 (EAR1OP, EAR1ON) and auxiliary out (AUXOP, AUXON) are
differential outputs. Earphone2 (EAR2/EAR3) is a single-ended output stage designed to drive a
headset speaker.
The microphone interface consists of two differential microphone inputs, one differential auxiliary input
and a two-stage audio amplifier.
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
(+16.5dB)
Figure. Audio Interface Detailed Diagram(MSM6260)
Page 49
- 50 -
3. TECHNICAL BRIEF
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
MSM6260 CODEC pins
AF20
MIC1P
AE20
AF21
MIC2N
MIC2P
AF22
MICBIAS
T15
AC21
AC22
LINE_L_IP
AC18
LINE_ON
LINE_OP
AC17
AC20
LINE_R_IN
LINE_R_IP
AC19
MIC1N
LINE_L_IN
HPH_L
W17
AA17
HPH_R
AA19
HPH_VREF
AF18
EAR1ON
AE18
EAR1OP
COMP
AA20
AUXIP
AUXOUT
AA18
AF19
AUXIN
AE19
TTY DETECT
R8021M
C802
0.1u
R803
330K
R801
0.1u
2.2K
C801
HH-1M1005-601JT
FB1
tcc_1608h_9_r
C815
10u
2
GND
1
OUT
VCC
5
3
VIN+
VIN-
4
U801
NCS2200SQ2T2G
MIC2P
HOOK_SENSE_N
VREG_MSMP_2.8V
EAR_MIC2P
TTY_ADC_DET
VREG_MSMP_2.8V
MIC
0.1uC837
C838
PRSB6.8CVA301
0.1u
47
R834
47
R835
U303
SP0204LE5-PB
2
G1
G2
3
G3
5
OUT
1
4
PWR
MIC1P
MIC1N
MICBIAS
Figure . Audio part schematics
Page 50
- 51 -
3. TECHNICAL BRIEF
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Select RCV / SPK
R829
100K
15
R837
100000pF
C839
3
COM1
COM2
9
6
GND
4
IN1
8
IN2
5
NC1
7
NC2
2
NO1
NO2
10 1
VCC
U301
NLAS5223BMNR2G
15
R836
RCV+
AMP_SPK-
AMP_SPK+
SPK_SW_ON
+VPWR
RCV-
SPK+
SPK-
Audio AMP
R312
51K22n
C318
C321
1u
10u
22n
C317
51K
R314
C319
IN+
A1
IN-
C1
PVDD
B2
VDD
B1
VO+
C3
VO-
A3
_SHDN
C2
EUSY0278601
TPA2010D1YZFU302
A2
GND1B3GND2
AMP_P
SPK_AMP_EN
+VPWRAMP_N
AMP_SPK+
AMP_SPK-
Figure . Audio part schematics
Page 51
- 52 -
3. TECHNICAL BRIEF
3.12.9.2 Audio Mode
There are three audio modes (Voice call, speaker phone, MIDI/MP3).
Audio & Sound Main Component
There are 5 main components in CU575.
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
MODE Device Description
Voice Call Receiver Mode Receiver Voice Call
Loud Mode Speaker Phone
Headset Headset Voice Call
Speaker phone Loud Mode Speaker Phone
MIDI Loud Mode Speaker MIDI Bell
Headset Headset MIDI Bell
MP3 Loud Mode Speaker MP3
Headset Headset MP3
Table. Audio Mode
Table. Audio main component list
-42 dB microphoneSP0204LE5-PBU303Microphone4
Ear jack
GU041-18P-E1000
CON801Ear jack5
8 ohm Speaker/receiverEMS1813VCD2PIn LCD-FPCBSpeaker3
Class-D Audio Amp
Base-Band Modem
Note
TPA2010D1YZF
MSM6260
Maker Part No.
U302
U201
Design No.
Audio amp.
MSM6260
Component
2
1
Page 52
- 53 -
3. TECHNICAL BRIEF
3.13 Main Features
1. LG-CU575 Main features
- Dual Clamshell Type
- WCDMA(850, 1900) + EDGE Quad(Class10)
- Color LCD(Main:65K TFT, 2.2’, Sub:TFT, 1.3”)
- SXGA(1.3M) Camera
- 18 x 13 speaker
- Stereo Headset
- Speaker phone(in GSM and WCDMA)
- 72 Poly Sound
- MP3/AAC decoder and play
- MPEG4 encoder/decoder and play/save
- JPEG en/decoder
- Supports Bluetooth, USB
- Micro SD card
- 970 mAh (Li-Ion)
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 53
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
2. CU575 Main Component
3. TECHNICAL BRIEF
- 54 -
Bluetoot
Logic
/Audio
RF
h
Logic
/Audio
Main board, Bottom
Main board, Top
LCD FPCB
Page 54
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TECHNICAL BRIEF
- 55 -
RF
U108
FL101
U110
FL105
U103
U101
FL102
FL104
FL106
U102
Reference Description Reference Description
U101 FEM FL101 GSM SAW
U102 RTR6275 FL102 W1900 Duplexer
U103 GSM PAM FL104 W850 Duplexer
U108 WCDMA PAM FL105 W850 SAW
U110 RFR6275 FL106 W1900 SAW
Page 55
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Audio/Logic/BT
3. TECHNICAL BRIEF
- 56 -
Reference Description Reference Description
U109 BT module BAT401 Back-up Battery
U201 MSM6260 S801 Micro SD socket
U302 Audio AMP X701 X-tal(32.768KHz)
U303 MIC X702 TCXO
U701 PMIC CON801 MMI connector
U804 OVP IC CON401 USIM connector
U806 Memory CON601 FPCB connector
U109
CON601
S801
X702
CON401
U303
BAT401
U806
U201
U302
X701
U701
U804
CON801
Page 56
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 57 -
4. TROUBLE SHOOTING
4.1 RF Component
Bottom Side
Page 57
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 58 -
Page 58
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 59 -
4.1.1 SIGNAL PATH_UMTS RF
WCDMA TX PATH
WCDMA RX PATH
Page 59
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 60 -
4.1.2 SIGNAL PATH_GSM RF
GSM TX PATH
GSM RX PATH
Page 60
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 61 -
4.2 Checking VCXO Block
The reference frequency (19.2MHz) from X702 (VCTCXO) is used in UMTS TX part, GSM
part and BB part.
Check 1. Crystal part
If you already check this crystal part, you can skip check 1.
Schematic of the Crystal Part
Test Point (Crystal Part)
TCXO
VCC
5
TC7SH04FS
U106
GND
2
14
100ohm R127
C64
1000p
C66 1000p
100pC56
100KR131
C51
0.01u
1000pC62
C54
0.1uF
C58 1000p
GND
2
5
NC1
NC2
67
NC3
NC4
8
OUTPUT
3
4
VCC1VCONT
DSA321SCE-19.2M X702
1000p
C53
VREG_TCXO_2.85V
RFR6275_TCXO
TRK_LO_ADJ
TCXO_BT
VREG_BT_2.85V
TCXO_PM
RTR6275_TCXO
TP1
TP2
TP3
TP4
TP1
TP2
TP4
TP3
Page 61
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 62 -
Check C714 of PMIC (U701)
Check R211 of MSM (U201)
Page 62
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 63 -
4.3 Checking Ant. SW Module Block
Antenna Switch Block(Bottom)
ANT_SEL0
ANT_SEL1
ANT_SEL2
ANT_SEL3
TP1
Page 63
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
CONTROL LOGIC
4. TROUBLE SHOOTING
- 64 -
Logic Table of the Antenna Switch
Schematic of the Antenna Switch Block
Mode Vc1 Vc2 Vc3 Vc4 Vdd
GSM850/900 Tx 1.8-3.0V 1.8-3.0V 0-0.2V 0-0.2V 2.4-3.0V
GSM1800/GSM1900 Tx 1.8-3.0V 0-0.2V 0-0.2V 0-0.2V 2.4-3.0V
GSM850 Rx 0-0.2V 0-0.2V 0-0.2V 0-0.2V 2.4-3.0V
GSM900 Rx 0-0.2V 0-0.2V 1.8-3.0V 0-0.2V 2.4-3.0V
GSM1800 Rx 0-0.2V 1.8-3.0V 1.8-3.0V 0-0.2V 2.4-3.0V
GSM1900 Rx 0-0.2V 1.8-3.0V 0-0.2V 0-0.2V 2.4-3.0V
UMTS1 1.8-3.0V 0-0.2V 1.8-3.0V 0-0.2V 2.4-3.0V
UMTS2 1.8-3.0V 0-0.2V 1.8-3.0V 1.8-3.0V 2.4-3.0V
Idle 0-0.2V 0-0.2V 0-0.2V 0-0.2V 0-0.2V
TP1
ANT_SEL0
ANT_SEL1
ANT_SEL2
ANT_SEL3
19
14
VC1
13
ANT
VC2
12
VC3
11
VREG_RF_2.85V
1K R112
C11
0.1uF
1K R113
L10815nH
C12
33p
R1151K
R1161K
VC4
10
VDD
9
GND1
18
GND2
20
GND3
U101
21
GND4
23
GND5
24
GSM1800_1900TX
GND6
26
GND7
27
GND8
28
GND9
LMSP4LMA-573TEMP
GSM1800RX1
GSM1800RX2
GSM1900RX1
GSM1900RX2
GSM900RX1
GSM900RX2
GSM850RX1
GSM850RX2
UMTS1
UMTS2
GSM850_900TX
1
2
3
4
5
6
7
8
15
16
22
25
17
NC
Page 64
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 65 -
Checking Switch Block power source
Page 65
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4.4 Checking UMTS Block
4.4.1 Checking TX POWER of UMTS1900MHz
4. TROUBLE SHOOTING
- 66 -
Test Point (RF TX POWER of UMTS1900)
TP4
TP2
TP1
TP3
Page 66
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 67 -
For testing, Max power of UMTS1900MHz is needed.
4.4.3
Page 67
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4.4.2 Checking TX POWER of UMTS 850MHz
4. TROUBLE SHOOTING
- 68 -
Test Point of RF TX POWER of UMTS 850
TP4
TP1
TP2
TP3
Page 68
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 69 -
For testing, Max power of UMT850MHz is needed.
4.4.3
Page 69
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4.4.3 Checking UMTS PAM Control Block
• PAM control signal
1. PWR_DET : UMTS Tx Power Detected value (Check R103)
2. TX_AGC_ADJ : UMTS RTR6275 Tx Amp Gain Control
3. VREG_RF_2.85V : UMTS PAM enable (about 2.85V)
4. VREG_W_PA : UMTS PAM Main Voltage ( 3V < VREG_W_PA < 4.2V)
4. TROUBLE SHOOTING
- 70 -
VREG_W_PA
(Q102, pin3)
R103
UMTS850
Coupler
VREG_W_PA
(C72)
UMTS1900
Coupler
Page 70
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 71 -
4.4.4 Checking RF Rx Level
C12
33p
1.5p
1K R112
C3
0.1uF
C11
17
NC
15
UMTS1
UMTS2
16
14
VC1
VC2
13
12
VC3
VC4
11
10
VDD
21
GND4
GND5
23
GND6
24
26
GND7
27
GND8
GND9
28
GSM1800RX1
1
2
GSM1800RX2
GSM1800_1900TX
22
GSM1900RX1
3
4
GSM1900RX2
7
GSM850RX1
GSM850RX2
8
25
GSM850_900TX
GSM900RX1
5
6
GSM900RX2
LMSP4LMA-573TEMP
U101
19
ANT
GND1
9
18
GND2
20
GND3
ANT103
L10815nH
56pC1
R1151K
4.7nH
L103
1.8nH
L704
1K R113
KMS-512
ANT
G1
G2
RF
SW101
C822
1p
ANT101 ANT102
R102
5.6nH
56p
C18
0R101
L707
NA
C15
56p
R1161K
C16
NA
WCDMA_1900
WCDMA_850
VREG_RF_2.85V
ANT_SEL2
ANT_SEL0
ANT_SEL1
ANT_SEL3
WCDMA
L130
15nH
G2G3G4G5G6
G7
RX TX
FL102
ACMD-7402-TR1G
ANT
G1
C71
39p
RX
TX
B7637
FL104
ANT
GND1
GND2
GND3 GND4
GND5
GND6
C61
3.9p
NA
C75
10p
C52
L127
3.3nH
C823
1p
56p
C68
RX_WCDMA_1900
RX_WCDMA_850
WCDMA_850
WCDMA_1900
(1%)
(PPS)
(1%)
1.6K 1.6K
2.2u
C108
30p
C105
10R143
C104
0.1u
C88
150p
2.2u
C107
C87
2.2n
10K R136
120p
C114
C103
47nH
L145
30p
22p
C115
0603
3
8
VDDA3
11
VDDA4
VDDA5
16
VDDA6
21
26
VDDA7
31
VDDA8
VDDA9
36
VDDM1
22
25
VDDM2
20
RX_IP
19
18
RX_QM
RX_QP
17
R_BIAS
2
R_BIAS_GPS
33
R_BIAS_UMTS
13
23
SSBI
45
TCXO
47
UMTS_CP_OUT
1
VDDA1
39
VDDA10
40
VDDA11
VDDA12
42
VDDA13
46
48
VDDA14
VDDA2
GPS_PLNA_OUT
30
GRX_IM
29
GRX_IP
GRX_QM
28
GRX_QP
27
6
HB_INM
HB_INP
7
HB_LNA_IN
15
9
HB_LNA_OUT
4
LB_INM
LB_INP
5
14
LB_LNA_IN
10
LB_LNA_OUT
NC1
12
43
NC2
44
NC3
RX_IM
RFR6275
U110
34
BLANK
24
GND
GND_SLUG
49
41
GPS_CP_OUT
38
GPS_INM
GPS_INP
37
GPS_PLNA_IN
32
35
22p
C113
L144
47nH
G1
2
G2
5
IN
1
O1
3
O2
4
FL105
B7838
1.2nH
1.2nH
L137
L143
C112
120p
2.7R141
30p
C101
0.1u
C102
30p
C93
L141
33nH
68nHL149
R139 5.62K
C81
33p
L139
15nH
L706
R142
51
1.8nH
C85 4p
C109
C99
NA
NA
R137 1.5K
0.5p
2
G1
G2
5
IN
1
O1
3
O2
4
C110
FL106
B7847
C96
100p
22p
C116
82p
C92
L142
15nHL140
15nH
L146 68nH
R140
330
11.8KR138
4.7nH
C94
L147
L705
0.01u
C82
1.8nH
4p
NA
C100
C89
1nH
10p
L148
100p
C117
VREG_W
VREG_RF_SMPS
RX_IM
RX_IP
RX_QM
RX_QP
VREG_MSMP_2.8V
VREG_W
RFR6275_TCXO
RX_WCDMA_1900
RX_WCDMA_850
SSBDT_RFR
TP1
TP2
TP3
Vbias’
Vbias
TP4
TP2’
TP3’
TP4’
Page 71
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 72 -
*
TP*`: UMTS 850 RX PATH
TP*: UMTS 1900 RX PATH
ANT103
Page 72
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 73 -
4.5 Checking GSM Block
1. ANT.SW
Module
2.Tx PAM
3. Rx path
Page 73
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 74 -
4.5.1 Checking Ant. SW Module
Refer to chapter 3.3
Schematic of RF Tx level
TP1
TP2
TP3
11.
ANT_SEL0
ANTENNA SWITCH MODULE LOGIC
LOW
LOW
LOW
LOW
LOW
LOW
GSM900 RX
HIGH
LOW
HIGH
HIGH
LOW
LOW
LOW
LOW
LMSP4LMA-573TEMP_Rev B Later
DCS/PCS TX
LOW
UMTS 850
HIGH
HIGH
LOW
HIGH
HIGHLOW
UMTS 1900
HIGH
GSM900/GSM850 TX
GSM 850 RX
LOW
HIGH HIGH
LOW
DCS RX
LOW
LOW
ANT_SEL3
HIGH
PCS RX
ANT_SEL1
LOW
ANT_SEL2
HIGH
LOW
C12
33p
1.5p
1K R112
C3
0.1uF
C11
17
NC
15
UMTS1
UMTS2
16
14
VC1
VC2
13
12
VC3
VC4
11
10
VDD
21
GND4
GND5
23
GND6
24
26
GND7
27
GND8
GND9
28
GSM1800RX1
1
2
GSM1800RX2
GSM1800_1900TX
22
GSM1900RX1
3
4
GSM1900RX2
7
GSM850RX1
GSM850RX2
8
25
GSM850_900TX
GSM900RX1
5
6
GSM900RX2
LMSP4LMA-573TEMP
U101
19
ANT
GND1
9
18
GND2
20
GND3
ANT103
L10815nH
56pC1
C35
100u
R1151K
4.7nH
L103
NA
C44
1.8nH
L704
100p
C28
L122
4.7nH
1K R113
KMS-512
ANT
G1
G2
RF
SW101
C822
1p
ANT101 ANT102
R102
5.6nH
PGND622PGND7
23
24
PGND825PGND9
4
RSVD18RSVD212RSVD3
TX_EN
1
6
VAPC
VBATT
5
17
PGND1
PGND1026PGND1127PGND12
28
29
PGND1330PGND14
PGND15
31
32
PGND1633PGND17
PGND1834PGND19
35
18
PGND2
36
PGND20
PGND319PGND4
20
21
PGND5
SKY77329
U103
BS
3
DCS_PCS_IN
2
16
DCS_PCS_OUT
GND110GND2
11
13
GND3
GND4
14
15
GND5
7
GSM_IN
9
GSM_OUT
C32
0.5p
33p
C34
33p
C30
C821
1p
56p
C18
C45
NA
0R101
68p
C29
L707
NA
R117
2.2K
C15
56p
R1161K
C16
NA
100p
WCDMA_1900
C819
WCDMA_850
VREG_RF_2.85V
ANT_SEL2
ANT_SEL0
ANT_SEL1
ANT_SEL3
GSM_PA_EN
GSM_PA_BAND
+VPWR
GSM_PA_RAMP
TP1
TP2
TP3
Page 74
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 75 -
Checking RF Tx level
30dBm?
4.5.2
Page 75
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 76 -
4.5.2 Checking PAM Block
TP1. GSM_PA_RAMP : Power Amp Gain Control. typically, 0.5V < Vapc < 1.6V,
TP2. GSM_PA_EN : Power Amp Enable
(Power ON : higher than 2.5V , Power OFF : lower than 0.7V)
TP3. GSM_PA_BAND : Power Amp Band Selection Control
(GSM Mode : lower than 0.7V , DCS/PCS Mode : higher than 2.5V)
TP4. +VPWR : PAM Supply Voltage Vcc higher than 3.5V
Schematic of GSM PAM Block
TP1
TP2
TP4
TP3
11.4dB
82
R119
82 R120
R12182
C35
100u
NA
C44
100p
C28
L122
4.7nH
PGND6
22
PGND7
23
24
PGND8
25
PGND9
4
RSVD1
8
RSVD2
12
RSVD3
TX_EN
1
6
VAPC
VBATT
5
17
PGND1
PGND10
26
PGND11
27
PGND12
28
29
PGND13
30
PGND14
PGND15
31
32
PGND16
33
PGND17
PGND18
34
PGND19
35
18
PGND2
36
PGND20
PGND3
19
PGND4
20
21
PGND5
SKY77329
U103
BS
3
DCS_PCS_IN
2
16
DCS_PCS_OUT
GND110GND2
11
13
GND3
GND4
14
15
GND5
7
GSM_IN
9
GSM_OUT
C32
0.5p
33p
C34
33p
C30
C821
1p
C45
NA
68p
C29
R117
2.2K
100p
C819
GSM_PA_EN
GSM_PA_BAND
+VPWR
GSM_PA_RAMP
DCS_PCS_TX
TP3
TP4
TP2
TP1
Page 76
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 77 -
4.5.3 Checking RF Rx Block
TP1. GSM850 Rx Input
TP2. GSM900 Rx Input
TP3. PCS Rx Input
TP4. DCS Rx Input
TP1
TP3
TP2
TP4
L106 6.8nH
L119 27nH
27nHL116
17
NC
15
UMTS1
UMTS2
16
GSM1800RX1
1
2
GSM1800RX2
GSM1800_1900TX
22
GSM1900RX1
3
4
GSM1900RX2
7
GSM850RX1
GSM850RX2
8
25
GSM850_900TX
GSM900RX1
5
6
GSM900RX2
U101
19
ANT
12nH
L107
C17
12p
R104
12K
680R106
L110 6.8nH
6pC5
C9 12p
68nH
L112
15nH
L102
L101 6.8nH
L117
47nH
NA
L109
1.8nH
L704
4pC8
L105 6.8nH
27nHL114
C822
1p
R102
5.6nH
56nH
L113
L104
NA
47nH
L118
C6 6p
L111 27nH
56p
C18
R_BIAS1
3
R_BIAS2
27
SBDT
14
VCONTROL
56
55
ENV_OUT
GCELL_INN
30
GCELL_INP
31
GPCS_INN
37
36
GPCS_INP
HB_RF_OUT1
46
HB_RF_OUT2
44
43
LB_RF_OUT1
LB_RF_OUT2
42
24
RF_ON
R
22
54
DAC_REF
DCS_INN
39
38
DCS_INP
EGSM_INN
33
32
EGSM_INP
C15
56p
C16
NA
WCDMA_1900
WCDMA_850
DAC_REF
TX_ON
SSBDT_RTR
TX_AGC_ADJ
WCDMA_850_TX_OUT
WCDMA_1900_TX_OUT
DCS_PCS_TX
GSM_TX
Schematic of GSM850/GSM900/DCS/PCS Rx Block
TP4
TP1
TP2
TP3
Page 77
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 78 -
Page 78
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 79 -
4. BB Trouble Shooting
4.6 Power ON Troubleshooting
Power On sequence of CU575 is :
PWR key press(Key PCB) → PM_ON_SW_N go to low(D603), PM6650 KPDPWR_N pin(24) →
PM6650 Power Up → VREG_MSMC_1.25V(C733), VREG_MSME_1.8V(C734),
VREG_MSMP_2.8V(C721), VREG_MSMA_2.6V(C719), VREG_TCXO_2.85V(C714) power up
and system reset assert to MSM → Phone booting and PS_HOLD(D701) assert to PMIC
Start
Battery voltage is
higher than 3.25V?
Signal of D603 is low
When key is pressed?
VREG_MSMC_1.25V,VREG_MSMP_2.8V
VREG_MSME_1.8V, VREG_TCXO_2.85V,
VREG_MSMA_2.6V power up?
Is clock ok?
C56 : 19.2M
TP701 : 32.768Khz
Change the main board
Change or charging the
Battery
Check the Key Dome
Change the main board
Check the TXCO(X702)
NO
YES
YES
YES
YES
NO
NO
NO
Page 79
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 80 -
X702
C56
C734
(VREG_MSME_1.8V)
C733
(VREG_MSMC_1.25V)
TP701
C719
(VREG_MSMA_2.6V)
(VREG_MSMP_2.8V)
C721
(VREG_TCXO_2.85V)
C714
Page 80
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 81 -
4.7 Charger Troubleshooting ( TA Charging)
Charging Procedure
- Connect TA
- Control the charging current by PM6650 IC
- Charging current flows into the battery
Check Point
- Connection of TA
- Charging current path
- Battery
Troubleshooting Setup
- Connect TA and battery to the phone
Troubleshooting Procedure
- Check the charger connector
- Check the charging current Path
- Check the battery
Battery Charging Circuit
COLLECTOR
3
5
DRAIN
EMITTER1
1
2
EMITTER2
GATE
6
P_COLLECTOR
910
P_DRAIN
4
SOURCE
U805
NUS3116MTR2G
8
BASE1
7
BASE2
R414
0.1
ICHARGE
ICHARGEOUT
VBATT
VBATT
+5V_PWR
USB_VBUS
CHG_CNT_N
USB_CNT_N
BATT_FET_N
+VPWR
Main Battery
TA
Turn to low
About 5 V
Page 81
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 82 -
Troubleshooting Flow
Start
Check the pin and Insert
a Battery and TA
Connection OK?
Change 18pin connector
(CON801)
C808 is 5V?
Change a TA
Pin 1 of U804 is 5V?
Change a U804
No
YES
No
YES
No
Pin 1 of U802 is 5V?
Change a U802
No
YES
Change a U805
No
YES
R414 is 5V?
YES
Change a main Board
Page 82
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 83 -
Pin 1 of U802
U804
C808
U805
Pin 1 of U805
CON801
R414
Page 83
- 84 -
4. TROUBLE SHOOTING
4.8 Charger Troubleshooting ( USB Charging)
Charging Procedure
- Connect USB
- Control the charging current by PM6650 IC
- Charging current flows into the battery
Check Point
- Connection of USB
- Charging current path
- Battery
Troubleshooting Setup
- Connect USB and battery to the phone
Troubleshooting Procedure
- Check the charger connector
- Check the charging current Path
- Check the battery
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Battery Charging Circuit
COLLECTOR
3
5
DRAIN
EMITTER1
1
2
EMITTER2
GATE
6
P_COLLECTOR
910
P_DRAIN
4
SOURCE
U805
NUS3116MTR2G
8
BASE1
7
BASE2
R414
0.1
ICHARGE
ICHARGEOUT
VBATT
VBATT
+5V_PWR
USB_VBUS
CHG_CNT_N
USB_CNT_N
BATT_FET_N
+VPWR
Main Battery
USB Cable
Turn to low
About 5 V
Page 84
- 85 -
4. TROUBLE SHOOTING
Troubleshooting Flow
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Start
Check the pin and Insert
a Battery and Connect a USB Cable
Connection OK?
Change 18 pins connector
(CON801)
VA808 is 5V?
Change a USB Cable
No
YES
No
YES
Change a U805
No
R414 is 5V?
YES
Change a main Board
Page 85
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 86 -
VA808
U805
CON801
R414
Page 86
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 87 -
4.9 USB Troubleshooting
USB Initial sequence of CU575 is :
USB connected to CU575 power on → USB_VBUS go to 5V → USB_D+ go to 3.3V →
48M Crystal on → USB_VP and USB_VN is triggered → USB work.
Start
VA808(USB_VBUS)
is 5V?
VA810(USB_D+)
is 3.3V?
48M clock is running?
Change the main board
Check VA808
Check VA810
Check X201
NO
YES
YES
YES
NO
NO
Cable is inserted?
YES
Insert cable
NO
Power is on?
YES
Go to power on trouble shooting
NO
Page 87
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 88 -
X201
VA808
VA810
Page 88
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 89 -
4.10 SIM Detect Troubleshooting
USIM Initial sequence of CU575 is :
USIM_CLK,USIM_RST,USIM_DATA triggered → VREG_USIM_2.85V go to 2.8V → USIM IF work
Start
Work well?
VREG_USIM_2.85V is 2.85V?
USIM_P_CLK is run?
Change the main board
End
Check CON401
YES
No
YES
NO
Re-insert the SIM card
Change SIM card
Work well? End
YES
No
Page 89
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 90 -
VREG_USIM_2.85V
USIM_P_CLK
GND
CON401
Page 90
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 91 -
4.11 Camera Troubleshooting
Camera control signals are generated by MSM6260.
Start
VREG_CAM_2.7V is 2.7V?(C413)
VREG_CAM_1.8V is 1.8V?(C414)
YES
NO
ENDCamera is OK?
Check the camera connector and
reconnect the camera
Change the main board
Camera is OK
Check the CAM_MCLK
Change the camera
YES
YES
NO
NO
NO
END
YES
(FL606_Pin4)
Change the main board
Change the main board
FB500
C413
C414
FL606
Page 91
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 92 -
4.12 Keypad Backlight Troubleshooting
Key Pad Back Light is on as below :
Key pressing → KYBD_BACKLIGHT go to 0V → Main LED On
Start
Change the main board
Check battery
NO
YES
YES
Key press
Change the main board
YES
NO
Signal +VPWR is
over 3.2V?
VA501 is 0V ?
+VPWR
0 V
Page 92
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 93 -
4.13 Folder ON/OFF Troubleshooting
Folder On/Off is worked as below :
Folder On/Off Event -> Flip(U405 pin OUT) is triggered(On : about 2.1V, Off : 0V) ->
MSM6260 Sense the Folder Event
Start
Change the main board
Insert the magnet
Check the magnet in
Folder ASSY
Approach the magnet to
U405
FLIP(U405 pin 2) is
0 V?
YES
NO
YES
Change the U405
NO
Magnet
U405
Page 93
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 94 -
4.14 Main LCD Troubleshooting
Main LCD control signals are generated by MSM6260. The signal path is :
MSM6260 → C0N601(Main Board) → CN102(LCD FPCB) → LCD Module
Start
Go to power on trouble shooting
Key LED is on?
Change the LCD module
YES
NO
Press END key
Disconnect and reconnect
The LCD connector(CON601)
END
LCD display OK?
No
YES
END
LCD display OK?
No
YES
Change the main board
END
LCD display OK?
No
YES
Change the LCD FPCB
Page 94
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 95 -
4.15 Receiver Path
MSM6260 RCV+/RCV- → R836/R837 → Analog Switch(U301) → CON601
L1,L2(LCD_FPCB) → SPKP,SPKN
Start
Connect the phone to network
equipment and setup call
Setup 1KHz tone out
Sine wave appears at
R836/R837?
Check R836/R837 or
Change the main board
NO
Change the main board
NO
YES
Sine wave appears at
L1,L2 on LCD_FPCB?
Change the LCD
FPCB
NO
Can you hear the tone?
Change the speaker
NO
YES
END
YES
YES
Speaker soldering is
Good?
Re-solder Speaker
NO
SPK_SW_ON(R829) is
0 V?
Page 95
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 96 -
L1, L2
R836/R837
U301(Analog Switch)
CN102
Page 96
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 97 -
4.16 Headset path
MSM6260 HPH_R, HPH_L → C803/C804 → R804/R825 → CON801
Start
Sine wave appears
at C803/C804 ?
Re-solder R804/R825
YES
Connect the phone to network
equipment and setup call.
Setup 1KHz tone out
and insert headset.
NO
Can you hear the tone?
Change the Head_Set
YES
NO
END
Sine wave appears at
R804/R825?
Change the main board
YES
NO
Page 97
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 98 -
C803/C804
R804/R825
CON801
Page 98
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 99 -
4.17 Speaker phone path
MSM6260(AMP_P,AMP_N) → Audio AMP(U302) → Analog Switch(U301) →
Main Connector(CON601) → L1,L2(LCD_FPCB) → SPKP,SPKN
Start
Connect the phone to network
equipment and setup call
Setup 1KHz tone out
Sine wave appears at
C318/R312 and C319/R314?
C318/R312 and C319/R314 or
Change the main board
NO
AMP_VDD(C317) is
Over 3.6V?
Change the main board
NO
YES
SPK_SW_ON(R829) is
Over 1.8V?
NO
YES
Sine wave appears at
L1,L2 on LCD_FPCB?
Change the LCD
FPCB
NO
Can you hear the tone?
Change the speaker
NO
YES
END
YES
Change the main board
YES
Speaker soldering is
Good?
Re-solder Speaker
NO
Page 99
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 100 -
L1, L2
U301(Analog Switch)
U302(Audio AMP)
Page 100
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 101 -
4.18 Main microphone
U303(MIC) → R834,C837 → MIC1P(MSM6260)
Start
MIC_BIAS
is 1.8V
Change main board
NO
Make a call
Change the MIC
NO
NO
YES
YES
END
Make sound to MIC
Work well?
Change the
main board
YES
Sine wave appears at
C837 ?
Loading...