Sony NW-WM1A Service Manual page 12

NW-WM1A/WM1Z
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
HOLD-NFC 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,
releases the connection between
the HOLD-NFC FPC board. Then a
new NFC antenna connecting to the
HOLD-NFC 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 HOLD-NFC 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 HOLD-
NFC FPC board. The NFC antenna is connected to the main board via the HOLD-NFC FPC board.
Check if the buttons on the right side of the main unit function and confi rm that the HOLD-NFC FPC board is properly connected to the main
board. If the buttons do not function properly, the HOLD-NFC FPC board connection may be poor or disconnected.
12
The NFC antenna is properly
connected to the connector on the
No
HOLD-NFC 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.
No
No
State that does not removed the
HOLD-NFC FPC board from the
main unit, releases the connection
between the NFC antenna. Then a
No
new HOLD-NFC 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 HOLD-NFC FPC
board, NFC connection checking is
complete.