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14.2 Connection apparatus isn't recongnize
Is it aware of the USB hub in the host PC?
NG
OK
Is apparatus connected to the down stream port ?
NG
OK
Is 5V +/- 5% supplied to J204 pin1?
NG
OK
Doesn't L209 open ?
NG
OK
Is 5V supplied to IC201 pin 9 ?
NG
Faulty operation of the over-current protection function .
OK
Proceed section 14.4 " Check the USB IC ".
Trouble Shooting
OK
Failure point
L209 open.
OK
Proceed section 14.5 " Check the power supply "
Failure point
Proceed section 15.1 "HUB isn't recognize"
Failure point
The un-connection of the down stream port cable.
Doesn't C215, C216, short
with GND ?
NG
Is resistance on both ends of
R206 less than 1 Ohm ?
NG
NEC-FA150ATUA
Failure point
C215,C216 short
Failure point
R206 failure.
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