4. TROUBLE SHOOTING
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4. TROUBLE SHOOTING
4.8 USB Connection Trouble
4 8 1 Main Board
TP1
4.8.1 Main Board
TP3
TP2
TP4
2.2u
C316
CN301
ENRY0012001
EAG59068701
1
2
3
4
G2
G1
DNI
R382
DNI
R381
VDD_3.3
47K
R305
1K
R321
100n
C317
Q300
EQBN0009301
DTC114EM-T2L
C
B
E
00
3
D
2
1
3
FL302
5
6
3
1
4
2
P2
P4
P1
P3
6
P
5P
R380
0
USB1_SELECT
CON_USB1_DP
CON_USB1_DM
USB1_SENSE/
TP1
TP3
VDD_3.3
1u
C358
K7
4
90
3
R
DG2722
EUSY0386501
U300
10
9
8
7
4
3
5
2
6
1
D+
HSD1-
D-
HSD2+
GND
HSD2-
HSD1+
_OE
V+
S
DNI
R385
R384
0
0
38
3
R
USB1_SELECT
CON_USB1_DP
CON_USB1_DM
LTE_USB1_DP
LTE_USB1_DM
NP_USB1_DM
NP_USB1_DP
NP_USB1_SELECT
TP4
TP2