Service manual

124
8258I N/B Maintenance
8258I N/B Maintenance
8.7 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:
+F5V
+F3V
SUSC#
F_SUSC#
USB_OC01#
F_USB_OC01#
USB_OC23#
F_USB_OC23#
D/USBP[0..3]+
D/USBP[0..3]-
F_USBP[0..3]+
F_USBP[0..3]-
Parts:
U515
AKU501
AKU502
AKJ502
AKJ504
AKEL1~2
AKEL503~504
AKEL501~502
AKEL505~506
D13
AKR503
AKR505
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