Sim Card Interface Trouble - LG -T300 Service Manual

4. TROUBLE SHOOTING

4.12 SIM Card Interface Trouble

TEST POINT
TP01 : C130
CIRCUIT
USB_DP
USB_DM
2V85_VSIM
TP01
SIM_DATA
SIM_CLK
C130
SIM_RST
0.1u
uSD_CMD
uSD_D0
uSD_CLK
TP01
uSD_D1
uSD_D2
uSD_D3
LGE Internal Use Only
U102
Figure 4.13
U102
K11
DPLUS
K12
DMINUS
B11
XOX
A11
XO
M8
VSIM
G3
CC_IO
TP04
G2
CC_CLK
G4
CC_RST
SIM_DATA
H1
MMCI_CMD
H3
MMCI_DAT_0
H2
MMCI_CLK
H6
MMCI_DAT_1
G5
MMCI_DAT_2
K5
MMCI_DAT_3
ZD200ZD201 is DNI defaultly
4. TROUBLE SHOOTING
PIN #1
J202
SIM_CONNECTOR
2V85_VSIM
R210
J202
4.7K
4
C5 C1
5
C6 C2
6
C7 C3
10
GND4 GND1
9
C222
GND3 GND2
ZD202
22p
These are added for CMCC ESD test
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2V85_VSIM
PIN #1
1
2
3
7
PIN #1
8
C216
ZD203 ZD201
0.1u
C217
DNI
Only for training and service purposes
SIM_RST
SIM_CLK
C218
22p