Sony XBR-55X850D Service Manual page 61

FLOW
8. NETWORK MALFUNCTION
(2) Internal Wireless Network malfunction
Wireless Network
on the TV
Error Message appear
when the Wireless
Network is selected?
Yes
Hardware defect suspected.
Check harness
connection is OK
between WiFi and Bxx
OK
Change
Wi-Fi module
OK
Wi-Fi module
XBR-55X850D/857D, 65X850D/855D/857D, 75X850D
No
OK
NG
Connect properly
NG
Change harness
NG
between Bxx board
and WiFi
No
Is the radio field
Strength too weak
or even No signal?
Yes
NG
Change WiFi module
OK
WiFi module
Loose harness
NG
Change Bxx board
OK
Main Harness
TROUBLE SHOOTING
Bxx Board
Access Point
If Wi-Fi malfunction happens,
•
Wi-Fi module
•
Harness between WiFi and Bxx
•
Bxx board
are suspected.
61