Sim Detect Trouble - LG G5500 Manual

4.13 SIM Detect Trouble

Block Diagram
DBB
SIM_CLK
SIM_RST
SIM_PWRCTRL
SIM_CD
Connection between SIM and DBB
• SIM_CLK, SIM_IO, SIM_RST
Trouble Shooting Setup
• Insert the SIM into socket
-. Connect PIF to the phone, and power on.
V_IO
SIM_IO
10k
④
⑥
ABB V_SIM
VRSIM
DBBSIO
DBBSCK
10k
DBBSRST
SIMCLK
S IMIO
SIMRST
150p 22p
Check Points
• Contact between SIM and socket
-. Soldering of SIM socket
Trouble Shooting Procedure
• Check the power supply.
-. Check the soldering of SIM socket.
-. Check the SIM.
-74-
SIM
VPP
CLK
IO
RST
1u
①
③