Sony NW-ZX300 Service Manual page 13

NFC function checking fl ow chart:
Disassemble until you see the built-
in NFC antenna of main unit.
Note: That the main unit is state to
operate.
The NFC antenna is properly
connected to the connector of the
KEY FPC board.
Yes
The appearance of the NFC antenna
is normal.
(breaking of wire, damage etc.)
(See Footnote 1)
Yes
State that does not removed the
NFC antenna from the main unit,
release the connection between
the KEY FPC board. Then a new
NFC antenna connecting to the
KEY FPC board, as a result of
perform the NFC connection check
again, pop-up menu is displayed.
(See Footnote 2)
Yes
Replace a new NFC antenna, NFC
connection checking is complete.
Footnote 1: After checking that the NFC antenna is properly connected to the connector of the KEY FPC board, connect the tester to the connection pattern
of the FPC connector and confi rm that the resistance is close to 0Ω.
Footnote 2: If the pop-up menu is not displayed even after replacing with a new NFC antenna and checking the connection, check the status of the KEY
FPC board. The NFC antenna is connected to the main board via the KEY FPC board.
Check if the buttons on the right side of the main unit function and confi rm that the KEY FPC board is properly connected to the main board.
If the buttons do not function properly, the KEY FPC board connection may be poor or disconnected.
Footnote 3: The new NFC antenna is stuck state on the rear panel. Refer to the EXPLODED VIEWS (page 48) for details.
Footnote 4: The new KEY FPC board is stuck state on the battery plate. Refer to the EXPLODED VIEWS (page 49) for details.
The NFC antenna is properly
connected to the connector on the
No
KEY FPC board, as a result of
perform the NFC connection check
again, pop-up menu is displayed.
Yes
NFC connection checking is
completion.
Replace a new NFC antenna, as a
No
result of perform the NFC
connection check again, pop-up
menu is displayed. (See Footnote 2)
Yes
NFC connection checking is
completion.
Replace the MAIN board, as a result
No
of perform the NFC connection
check, pop-up menu is displayed.
Yes
NFC connection checking is
completion.
NW-ZX300/ZX300A
No
No
State that does not removed the
KEY FPC board from the main
unit, release the connection
No
between the NFC antenna. Then a
new KEY FPC board connecting
to the NFC antenna, as a result of
perform the NFC connection check
again, pop-up menu is displayed.
Yes
Replace a new KEY FPC board,
NFC connection checking is
complete.
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