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LGE Internal Use Only
Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
GS290 Operational Description Revision B
LG Electronics
83/136
LGE Property
START
6 pins are
soldered well?
Check Proper SIM
Card
Assemble
Resolder pin
Replace Main Board
Yes
Yes
No
Check All of SIM card voltage
GS290 support
2.9V SIM only
GCA26D-6S-H18-E1500
J400
9
8
10
7
6
3
5
2
4
1
C1
C5
C2
C6
C3
C7
GND1
GND4
GND2
GND3
0.1u
C401
VSIM_2V9 VSIM_2V9
R407
10K
22p
C405
C409
DNI
C410
22p
VSIM_2V9
SIM_RST
SIM_IO
SIM_CLK
SIM CONNECTOR