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TU550
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Hardware Architecture - LG TU550 Service Manual
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Contents
Table of Contents
Troubleshooting
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Table of Contents
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3. TECHNICAL BRIEF
3.7 Hardware Architecture
1800/1900
850
LGE Internal Use Only
EDGE
GSM
PAM
Q_VCO
PCS1900_Rx_SAW
DCS1800_Rx_SAW
RTR6250
GSM850_Rx_SAW
GSM900_Rx_SAW
850
coupler
PAM TX_SAW
HDET
VCO
VCTCXO
1900
coupler
PAM TX_SAW
SBI
SBI
RFR6202
RX_SAW
RFL6202
RX_SAW
BlueTooth
Figure. Simplified Block Diagram
LCD
LCD
(Main, Sub)
Camera 1.3M
T-
Micro SD
I/Q
USIM
KEY
PAD
Dual Speaker
MSM6275
Stereo Head Phone
MIC
SBI
USB
UART
IO_Conn
I/Q
SDRAM
NAND Flash
SBI
Copyright © 2007 LG Electronics. Inc. All right reserved.
- 36 -
Power
PM6650
JTAG
Only for training and service purposes
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Table of Contents
Troubleshooting
TROUBLE SHOOTING
68
Power ON Troubleshooting
92
Charger Troubleshooting
94
USB Troubleshooting
97
SIM Detect Troubleshooting
99
Camera Troubleshooting
100
Keypad Backlight Troubleshooting
101
Folder ON/OFF Troubleshooting
102
Main LCD Troubleshooting
103
Troubleshooting Download Errors
128
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