Side Buttons Malfunction - Sony XBR-55X805C Service Manual

3-6. SIDE BUTTONS MALFUNCTION

Side Key button
malfunction
XBR-55/65X800C,805C,807C,809C,810C
OK
Change Switch Unit
NG
Harness on Switch Unit
and B* Board properly connected
NG
OK
Change
Switch unit-B* board Harness
NG
Power Key (B*Board)
Check parts value :
0 ohm < R1089 < 2 ohm
4.4k ohm < R1432 < 5k ohm
OK
Power Key Muffin Pin (B*Board)
Check voltage(Power ON condition) :
3.13V < Voltage < 3.47V
NG
Switch unit issue
OK
Harness
connection
issue
Harness issue
NG
Parts Broken issue
OK
Muffin IC1000
problem
Change B*Board
TROUBLE SHOOTING
NG
Key AD(B*Board)
NG
Check parts value :
0 ohm < R1091 < 2 ohm
0 ohm < R1042 < 2 ohm
OK
Key AD muffin pin (B*Board)
OK
Check voltage (Power ON condition):
1.62V < voltage < 1.84V
NG
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