Sony XBR-65Z9D Service Manual page 51

FLOW
5. KEY SWITCH BUTTONS ERROR
Side key buttons error
Resistor value
[BM2/BFM]
R1108 : 0 [ohm]
R1049 : 47k [ohm]
R1222 : 4.7k [ohm]
* R1089 may be not mounted
Resistor value
[BM2/BFM]
R1028 : 4.7k [ohm]
R1107 : 0 [ohm]
R1050 : 20k [ohm]
R1051: 22k [ohm]
* R1091 may be not mounted
XBR-65/75/100Z9D
Check harness connection
between B-board and switch
module
NG
Change harness between B-
board to switch module harness
NG
Change switch module
NG
Check resistor value on B-board
OK In case that power key error
Check resistor value on B-board
In case that buttons error except power key
OK
OK
Harness connection issue
OK
B-board to switch module harness
issue
OK
Switch module issue
NG
Parts issue
NG
Main device issue
Change B-board
TROUBLE SHOOTING
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