128
8066
8066
MP N/B Maintenance
MP N/B Maintenance
8.9 USB Test Error-1
An error occurs when a USB I/O device is installed.
Re-test
OK?
Test
OK?
USB Test Error
Check if the USB device is installed
properly.
No
Yes
No
Yes
Check the following parts for cold solder or one of the following
parts on the mother-board may be defective, use an oscilloscope
to check the following signal or replace the parts one at a time
and test after each replacement.
Replace another known good USB
device.
Board-level
Troubleshooting
Correct it.
Correct it.
Replace
Motherboard
Signals:
+5VS_P
USB_OC0#
USB_OC1#
USB[0..2]+
USB[0..2]-
+VCC_USB_0
+VCC_USB_1
+VCC_USB_2
Parts:
U502
U501
J3
J511
L6
L7
L2
L502
L501
L503
Daughter Board
Signals:
USB_OC0#
USB_OC1#
USBP[0..2]+
USBP[0..2]-
USB[0..2]+
USB[0..2]-
Parts:
U513
R203
R204
R199
R201
L21
L23
L28
L29
L33
Main Board
MiTac Secret
Confidential Document