LG GS290 Service Manual page 81

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