Sony BRAVIA KDL-55W900A, Service Manual, Page: 206 / 241

RB1G
CHASSIS
W900A/904A/905A
Troubleshooting
3-7. SIDE BUTTONS MALFUNCTION
■
Execute SIDE BUTTONS
i.Start Side Key check with diag sidekey_check.
ii.Push Side Key : CH+
when [MESSAGE] PLEASE PUSH [ CH+ ] KEY is displayed.
iii P h Sid K CH
HUS button
malfunction
iii.Push Side Key : CH-
when [MESSAGE] PLEASE PUSH [ CH- ] KEY is displayed.
↓
iv.Check that diag sidekey_check result OK is returned.
malfunction
Check Harness on HUS and Check Harness pin Assignment
Probe at Key_AD line and
Change HUS

When this check result is NG.
B* Board properly connected According to circuit.
OK
OK
NG
NG
y_
check the signal
NG? OK
Change B* Board
Loose harness

connect properly
Change Harness
(*)
Size B* Board Type
OTHERS JP
40” BA2-S BA2-W
46” BA2-S BA2-W
55” BA2-S BA2-W
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