Sim Detect Trouble - LG MG180C Service Manual

4. TROUBLE SHOOTING

4.12 SIM Detect Trouble

Block Diagram
SIM_PWRCTRL
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.
DBB V_IO
VRSIM
DBBSIO
SIM_IO
DBBSCK
SIM_CLK
DBBSRST
SIM_RST
10k
SIM_CD
100k
ABB V_SIM
10k
SIMCLK
S IMIO
SIMRST
22p 0.1u
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.
- 62 -
SIM
VPP
CLK
IO
RST