MiTAC 8050QMA Service Manual page 129

8.9 USB Test Error-2
An error occurs when a USB I/O device is installed.
P SW_VDD3
23
From U13
USB_OC0#
P
R179
11
0
USBP0+
R180
0
USBP0-
R192
0
USBP1-
R186
0
USBP1+
U709
South Bridge
P SW_VDD3
23
From U13
USB_OC1#
ICH6-M
R191
0
USBP2+
R190
0
USBP2-
R786
0
USBP3-
R787
0
USBP3+
80 50QMA N/B Maintenance
80 50QMA N/B Maintenance
+5V
R791
22
+5V
R792
22
U501
RT9701-CB
3
1,5
VIN VOUT0,1
P
2
4
14
CE
R502
GND
33K
C504
150µ
C172
C505 R503
1µ 1000P 47K
L5
90Z/100M
3 2
4 1
L6
90Z/100M
4 1
3 2
U503
RT9701-CB
3 1,5
VIN VOUT0,1
P 2
4
14
CE R10
GND
33K
C2
150µ
C178 C163 R159
1µ
1000P 47K
L10
90Z/100M
2 3
1 4
L13
90Z/100M
1 4
2 3
L502
120Z/100M
C503
0.1µ
F503
J701
1.1A
1
+VCC_USB_0
P
14
3
2
L501
120Z/100M
A1
+VCC_USB_1
A2
A3
C502
0.1µ
L1
120Z/100M
C4
0.1µ
F504
J706
1.1A
1
+VCC_USB_2
P
14
3
2
L552
120Z/100M
A1
+VCC_USB_3
A2
A3
C769
0.1µ
128