Sony KDL-40W900A Service Manual page 214

Troubleshooting
3-11. Wireless Network malfunction (continue)
*1) Come from
the previous page.
Check harness NG
connection is OK
between HSC and B* b t HSC d B*
NG
OK
NG NG
Change
Wi-Fi module
OK
Wi-Fi module
OK
Connect properly
NG
Change HSC board
OK
HSC board
Loose harness
Change harness
NG
Between B* board
and HSC board
OK
(*)
Main Harness
Size Size
40"
46" 46"
55"
W900A/904A/905A
If Wi-Fi malfunction happens,
• Wi-Fi module
• HSC board
• Harness between HSC and
B* Board
• B* board are suspected.
Change B* board
B* Board Type B* Board Type G* Board G* Board H* H*
Type Board
Type
OTHERS JP
BA2-S BA2-W G1A HIR
HIR HIR
BA2-S BA2 S BA2 W BA2-W G1A G1A
HIR
BA2-S BA2-W G1B
RB1G CHASSIS
H** Board H** Board
Type
HSC
HSC HSC
HSC
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