3-6. SIDE BUTTONS MALFUNCTION
44
NG
Change Switch Unit
OK
NG
NG
Side Key button
malfunction
Harness on Switch Unit
and B* Board properly connected
Change
Switch unit-B* board Harness
Harness
connection
issue
Change B*Board
Switch unit issue
Harness issue
OK
OK
OK
Power Key (B*Board)
Check parts value :
0 ohm < R1089 < 2 ohm?
Muffin IC1000
problem
NG
Power Key Muffin Pin (B*Board)
Check voltage(Power ON condition) :
3.287V < Voltage < 3.55V?
NG
OK
Key AD(B*Board)
Check parts value :
0 ohm < R1085 < 2 ohm?
NG
Parts Broken issue
Key AD muffin pin (B*Board)
Check voltage (Power ON condition):
1.53V < voltage < 1.89V?
NG
OK
OK
NG
KDL-65W850C, 855C, 857C, 75W850C, 855C
TROUBLE SHOOTING
Size B* Board G* Board
65”
BMX
GL1SB
75”
BMX
GL1C