U250/KU250
Table Of Contents
Page
Regulatory Information
Purpose
Electrostatic Sensitive Devices
Pictures
Interference and Attenuation
System Overview
Specification
Transmitter GSM Mode
Environment Accessory
Usable environment
Radio Performance
Case of DCS a 1710, B Case of PCS a 1850, B
Power Tolerance
Transmitter Wcdma Mode
3Receiver GSM Mode
Receiver Wcdma Mode
U250/KU250 Current Consumption
Current Consumption
Stand by Voice Call
Level Change
Indication Standby
Battery BAR
Charging
Test Item Specification
Sound Pressure Level
General Description
Block diagram of RF part
Technical Brief
GSM Receiver
GSM Mode
Antenna Switch Module Control logic
Technical Brief
RTR6275 RX feature
GSM Transmitter matching
GSM Transmitter
Transmitter
Umts Mode
Receiver
RTR6275 IC functional block diagram
Wcdma PAM U103 WS2512-TR1G
LO generation and distribution circuits
Off-chip RF Components
Front End Module control logic
Vctcxo X100 DSA321SCE-19.2M
Front-End Module U500 D5011
Usbotg
Pmic Functional Block Diagram U300 PM6650-2M
MSM6245 Interface
PM6650 Block Diagram
GSM PAM U101 SKY77318
GSM PAM Schematic
Umts DuplexerFL104ACMD-7602
Umts Rx RF filter FL103 EFCH2140TDE1
Wcdma Rx SAW Filter Specification
MSM6245 Bluetooth Baseband
Bluetooth M100 LBRQ-2B43A
General Description
Digital BasebandDBB/MSM6245
RTR6275
PM6650
512Mbit 76inch
Block DiagramMSM6245
Nand Flash
ARM Microprocessor Subsystem
Wcdma R99 features
SubsystemMSM6245
Edge features
GSM features
Gprs features
MSM6245 microprocessor subsystem
MSM6245 device audio processing features
Supported interface features
Video telephony services QvideophoneTM
Supported multimedia features
QcameraTM
QtvTM
Summary of MSM6245 device features
Description of RF configurations
Vocoder Subsystem
Mode Select and Jtag Interfaces
Stereo Wideband Codec
USB
General-Purpose Input/Output Interface
Uart
2. PM6650
Power Block
General
12 PM6650 Functional Block Diagram
Charging control
13 U250/KU250 Battery Bar DisplayStand By Condition
Parameter Min Typ Max Unit Trickle Current 100
Trickle Charging
Constant Voltage Charging
Constant Current Charging
Table#1. External memory interface
External memory interface
64MB
512Mb
DATA310
DQM30
RTR6275WCDMATx, GSMTx/Rx
11 H/W Sub System
RF Interface
Others
Usim Interface
MSM Sub System
GPIOMap Name
Table. Uart Interface
USB
Table. USB Signal Interface
Table. Hkadc channel table
HKADCHouse Keeping ADC
Table. Key Matrix Mapping Table
Key Pad
Camera Interface
21 Camera Socket Type Connector
CAMDATAOUT3
Dvdd
Keypad Light
22 Schematic of KEY back light circuit KEY side
Display & LCD FPC Interface
LCD Module NM176CN1 Tovis
24 Audio Interface Detailed DiagramMSM6245
Audio Signal Processing & Interface
25 Audio part schematics
MSM6245 Codec pins
MIC
Audio AMP
Audio part schematics
Audio Mode
LG-U250/KU250 Main features
Main Features
Logic Audio Bluetoot
SW100 U101 U500 FL101 U100 FL104 U103 X100
Logic / Audio
S300
U301
RF Component
Trouble Shooting
Umts
Signal Pathumts RF
Signal Pathgsm RF
Test Point of the VC-TCXO Block
Schematic of the VC-TCXO Block
Checking VC-TCXO Block
Check C312 of Pmic U300 Check R213 of MSM U201
Test Point of the Front-End Module Block
Schematic of the Front-End Module Block
Checking Front-End Module Block
Logic Table of the FEM
Checking Tx level
For testing, Max power of UMT 2100 is needed
Checking Umts Block
Trouble Shooting
Checking Umts PAM Control Block PAM control signal
TP2 TP4
Checking RF Rx Level
Trouble Shooting
Checking GSM Block
Checking RF Tx level
Schematic of RF Tx level
Trouble Shooting
TP1 TP4 TP2TP3
Checking PAM Block
TP1. DCS RX Input
Checking RF Rx Block
Trouble Shooting
Bluetooth
Checking Bluetooth Block
Change the M100 Signals exits?
Signals exits?
Start
Change the Main board
Power on Troubleshooting
Vregmsmc Vregmsme Vregmsmp
Charger
Charger Troubleshooting
Change TA Or USB Cable
Change the board Charger Troubleshooting Flow
Connection OK?
Charging part Main PCB Front
Q302
Q301
Go to power on trouble shooting
USB Troubleshooting
Cable is inserted? Insert cable
Q400 pin 4 is 5V? Check Q300 pin
Start Re-insert the SIM card
SIM Detect Troubleshooting
Yes
End
Usim
Start
Camera Troubleshooting
Yes Camera is OK?
Yes Check the Cammclk
Change the Main board 103
Yes
104
C350 C447 U501
U303C348 C349
Figure.Keypad backlight LED part 105
Keypad Backlight Troubleshooting
106
Main LCD Troubleshooting
107
Receiver Path
108
109
Headset path
110
111
Speaker phone path
112
113
Main microphone
114
115
Headset microphone
116
117
Vibrator
Work well? Yes End
118
Introduction
Downloading Procedure
U250/KU250 Download
120
Connecting to PC
121
Keep All Contents
EraseEFS
122
Choosing image files
123
124
125
Downloading
126
127
128
Tools
129
Troubleshooting Download Errors
130
131
NV Restore Error
132
133
Port number
GSM & Umts RF Block
U250/KU250 RF Functional Block Diagram 134
RF Block Component 135
RTR6275 & MSM6245 Interface Diagram 136
Interface Diagram
1 RTR6275 & MSM6245 Interface Diagram
Memory Interface
Memory Interface Diagram 137
USB, UART, SIM, Jtag Interface 138
3 USB,UART,SIM,JTAG Interface
139
Main RF signal Control signal
140
Placement Top Side
141
Bottom Side
142
143
Circuit Diagram
Nand & LCD
144
EBI2WEN Nandready Nandale Nandcle Resoutn EBI2OEN
145
146
LCD Connector
147
148
149
Configuration of HOT Kimchi
Configuration of directory
150
MSVCP60D.DLL MSVCRTD.DLL
151
152
How to use HOT Kimchi
Procedure
153
154
Test Program Setting
155
Wcdma Test Mode
156
GSM Test Mode
157
Exploded View & Replacement Part List
158
159
Replacement Parts Mechanic component
160
161
Replacement Parts Main component
162
163
164
165
166
DUPLEXER,IMT
167
168
169
170
RES,ARRAY,R
171
Vctcxo
172
173
174
Accessory