BDP-S7200
6-12E
6-9 USB (Front) Device Flow/USB (Rear) Device Flowchart
USB device is not recog
nized
Insert the USB device again.
Is it recognized when the power is
turned OFF and then ON again?
No
Is 5V present at CN201(FR-1304)
board) pin1?
No Is 5V present at
CN402
(MB board) Pin 5 or pin 6?
No
Is 5V present at
(MB board)?
No
Power supply IC310 (MB board -
defective
Ye s Y seYes
Poor contact of the USB device
Defective FFC between the IF
board and the MB board.
Does replac
ing IC501(MB board)
improve the symptoms?
No Replace the MB board
Yes
Yes
Replace the FFC between th
e
MB board and the IF board.
Do the symptoms improve?
No Replace the MB board.
IC 601 (MB board) defective
Yes
Defective FFC between the IF
board and the MB board
IC501
Pin 5 /6/7?
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