Side Buttons Malfunction - Sony GN1G Service Manual

3-6. SIDE BUTTONS MALFUNCTION

Side Key button
malfunction
KDL-50W800C, 805C, 807C, 809C/KDL-55W800C, 805C
OK
Change Switch Unit
NG
Harness on Switch Unit OK
and B* Board properly connected
NG
Change
OK
Switch unit-B* board Harness
NG
Power Key (B* Board)
NG
Check parts value :
0 ohm < R1089 < 2 ohm?
OK
Power Key Muffin Pin (B* Board)
Check voltage(Power ON condition) :
3.287V < Voltage < 3.55V?
NG
Switch unit issue
Harness
connection
issue
Harness issue
Parts Broken issue
OK
Muffin IC1000
problem
Change B*Board
TROUBLE SHOOTING
NG
NG Key AD(B* Board)
Check parts value :
0 ohm < R1085 < 2 ohm?
OK
Key AD muffin pin (B* Board)
OK
Check voltage (Power ON condition):
1.53V < voltage < 1.89V?
NG
Size B* Board
50"
BMX Not applicable
55"
BMX Not applicable
G* Board H* Board
HSC3
HSC3
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