Sony KDL-65W850C / KDL-65W855C / KDL-65W857C / KDL-65W858C / KDL-65W859C / KDL-75W850C / KDL-75W855C Service Manual ▷ View online
R5445
R5444
R5443
R5424
65
BMX-A side
Troubleshooting
66
Troubleshooting
3-5. SIDE BUTTONS MALFUNCTION
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
Change Switch Unit
Switch unit issue
Harness issue
OK
NG
NG
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
NG
Key AD(B*Board)
Check parts value :
0 ohm < R1085 < 2 ohm?
NG
OK
Parts Broken issue
Key AD muffin pin (B*Board)
Check voltage (Power ON condition):
1.53V < voltage < 1.89V?
NG
OK
OK
NG
67
Troubleshooting
Voltage check Power Key Muffin
Pin
R1089 R1085
Voltage check Key AD muffin
Pin
BMX > A-SIDE
68
IR do not response to
Remote Commander
Remote Commander
Remote control battery
could be weak.
Change battery.
Center white LED lit up
when remote control is
pressed
Check whether center
white LED blink ,when using
commander near the sensor
windows
Harness on H-board
and B* Board
properly connected
Change
H-B* board Harness
H-B* board harness
issue
Harness
connection
issue
Change Smart Core
OK
Smart core issue
NG
OK
OK
NG
NG
NG
OK
OK
B*Board
Check parts value :
0 ohm < R1062 < 2 ohm
NG
Change B*Board
Muffin IC1000
problem
IR Muffin Pin (B*Board)
Check voltage (Power ON condition):
3.287V < Voltage < 3.55V?
OK
NG
B*Board
Check parts value :
95 ohm < R1124 < 105 ohm
NG
Parts Broken issue
NG
OK
OK
3-6. IR REMOTE COMMANDER MALFUNCTION
Troubleshooting
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