Micro Sd Trouble - LG -S310 Service Manual

4.8 Micro SD Trouble

Check the Micro SD power and signal
-VBL_LDO_2V8 (TP2), VIO_2V8 (TP1)
-MSD_DET_N (TP3), MSD_CLK (TP4), MSD_CMD (TP5), MSD_D[0]~[3] (TP6~9)
'
MSD_D[2]
MSD_D[3]
TP2
MSD_CMD
MSD_CLK
MSD_D[0]
MSD_D[1]
VSIM_PWR
C300
1u
SIM_RST_N
SIM_CLK
SIM_DATA
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Only for training and service purposes
VBL_LDO_2V8
TP8
TP9
TP5
TP4
TP6
TP7
4.7K
R306
Figure 4.8.1 Micro SD Circuit
18
ST2
17
ST1
1
S4
2
T1
3
T2
S300
4
T3 49448-1611
5
T4
6
T5
7
T6
8
T7
9
T8
10
S8
C301
C302
C304
ICVL0518050FR
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4. TROUBLE SHOOTING
VIO_2V8
TP1
TP
MSD_DET_N
VA300
ENSY0018601
22p
22p
1u
VA307
LGE Internal Use Only