Micro Sd And Sim Card Trouble - LG KE970 Service Manual

5. Trouble shooting

5.10 Micro SD and SIM card trouble

Check Points
-Power control FET is working
-Socket soldering
-Proper SIM is used
-Card detect is working
1 S1
TF_PWR_EN 2
3 D2
R215
100K
TF_DAT2
TF_DAT3
TF_CMD
TF_CLK
TF_DAT0
TF_DAT1
R223
TF_DETECT
2V85_CARD
Q203
D1 6
R212 100K
G1 G2 5
S2 4
NTJD4105CT1G
R216 R217 R218 R219
100K 100K 100K 100K
47
C250 C251
1000p 22p
2V72_IO C236
27p
R213
R214
100K
4.7K
C239
27p
1
1
2
2
3
3
4
4
CN202
5
5
6
6
7
7
8
8
9
SWB
10
SWA
C252
1uF
- 90 -
C237
NA
2V85_SIM
C238
Q202
1u SI1305-E3
16
GND1
15
GND2
14
GND3
13
GND4
12
GND5
11
GND6