CYUSB3KIT-001 EZ-USB FX3 Development Kit Guide, Doc. #: 001-70237 Rev. *C
81
A.
Appendix - Troubleshooting
A.1
Self-Power Mode
A.2
Bus-Power Mode
Problem
Possible Cause
Possible Solution
FX3 DVK board does not
power on when power supply
is connected
Incorrect switch setting
Set switch SW9 to “VP50” (down) position
instead of “VBUS_IN” (up) position
DVK board or power adapter
failure
Insert the power plug firmly into the J49 power
jack
If problem persists, then the power supply unit
may be faulty. Test the DVK board with another
power supply unit with the same current/volt-
age ratings
If the FX3 DVK board does not power up even
after the power adapter has been replaced, the
board may be faulty.
Contact
http://www.cypress.com/go/support
for
technical assistance
Problem
Possible Cause
Possible Solution
FX3 DVK board does not
power on when USB cable is
connected
Incorrect switch setting
Set switch SW9 to “VBUS_IN” (up) position.
Incorrect setting of jumper
J53
Verify that pins 1–2 of J53 are shorted
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