LG GS290 - Page 81

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Only for training and service purposes
4. TROUBLE SHOOTING
GS290 Operational Description Revision B
LG Electronics 83/136 LGE Property
STAR
T
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 onl
y
GCA26D-6S-H18-E1500
J400
9 8
10 7
6 3
5 2
4 1
C1C5
C2C6
C3C7
GND1GND4
GND2GND3
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