4. TROUBLE SHOOTING
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Only for training and service purposes
LGE Internal Use Only
4.18 SIM detect Trouble Shooting
Yes
No
START
Check the SIM Slot.
No
Check “Dual SIM
Settings”
No
Yes
insert SIM Card correctly
No
Change the Main B/D
Change the Main B/D
TP3 or TP6 is 1.8V
or 3.0V and active?
SIM is checked?
SIM Card is inserted correctly?
TP2 or TP3 is 1.8V
or 3.0V?
TP1 or TP4 is 1.8V
or 3.0V?
Change the Main B/D
END
Yes
Yes
Measurement
VREG_RUIM1_3.0V & VREG_RUIM2_3.0V
SIM1_RST & SIM2_RST
SIM1_IO & SIM2_IO