7521Plus / N N/B MAINTENANCE
8.9 USB PORT TEST ERROR
An error occurs when a USB I/O device is installed.
J508
SH6
+5V
USB_OC0#
F502 |
| L2 | USB_B1 |
|
|
| |
R20 | C506 |
| C14 |
R19 |
|
|
|
SH21
B1
U24
SIS
630S
USBP0+
USBP0-
F503 |
| L6 |
+5V |
|
|
USB_OC1# | R22 | C507 |
|
| |
| R23 |
|
RP21 |
| L12 |
D/USBP0+ |
| |
|
|
D/USBP0-
USB_A1
C25
USB_B3
USB_B2
A1
B3 B4
B2 A4
USBP1+
D/USBP1+L8
USB_A3
A3
GND1 
GND2 
USBP1-
D/USBP1- |
|
R141 | R142 |
CP7 |
|
R140 | R143 |
USB_A2
A2 GND3 
GND4 
L504
L511
GND
USB_GND
123
