8170 N/B MAINTENANCE

8.10USB Port Test Error

An error occurs when a USB I/O device is installed.

USB Test Error

Check if the USB device is installed properly. (Including charge board.)

Test

Yes

Correct it

OK?

 

No

 

Replace another known good charge board or good USB device.

Re-test

Yes

 

Correct it

OK?

 

 

 

 

 

 

 

 

 

No

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Replace

Motherboard

Board-level

Troubleshooting

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.

Parts:

 

 

Signals:

U17

J6

 

VCC5

PJ2

U2

 

USBVCC5

R4

R3

 

 

-USBOC1

C1

C502

 

 

USBP2_2-

R[502:505]

 

 

 

 

USBP2_2+

L[1:4]

R5

 

R6

C4

 

-USBOC0

J2

J6

 

USBP0_0-

 

 

 

USBP0_0+

 

 

 

 

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