Microsd Trouble - LG KE820 Service Manual

5. Trouble shooting

5.11 MicroSD trouble

Check Points
-Power control FET is working
-Socket soldering
-Card detect is working
Q1 NTJD4105CT1G
1 S1 D1 6
R130
2 G1 G2 5
TF_PWR_EN
3 D2 S2 4
R133 R134
100K 100K
TF_DAT2
TF_DAT3
TF_CMD
TF_CLK
TF_DAT0
TF_DAT1
R183 47
TF_DETECT
C156 C142
1000p 22p
- 96 -
2V85_CARD 2V72_IO
100K
R132
100K
R135 R136 R137
S100
100K 100K 100K SCHA1B0102
DAT2_RSV
CD_DAT3_CS
CMD_DI
VDD
CLK_SCLK
VSS
DAT0_DO
DAT1_RSV
DETECT
COMMON
C143
DUMMY1
DUMMY2
1uF