Sony GN3TR - Page 46

XBR-49/55/65/75X900E
TROUBLE SHOOTING
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5. KEY SWITCH BUTTONS ERROR
46
Side key buttons error
Harness connection issue
Check harness connection
between B*board and switch
module
Change switch module
Switch module issue
B* board to switch module harness
issue
OK
Change harness between B*
board to switch module
harness
NG
NG
NG
OK
OK
Check resistor value on B*
board
In case that power key error
Parts issue
NG
Check resistor value on B*
board
In case that buttons error except power key
NG
OK
OK
Main device issue
Change B* board
[BMKP]
R250 : 0 [ohm]
R232 : 47k [ohm]
R1222 : 4.7k [ohm]
Resistor value
[BMKS]
R1108 : 0 [ohm]
R1049 : 47k [ohm]
R1222 : 4.7k [ohm]
[BMKP]
R1028 : 4.7k [ohm]
R249 : 0 [ohm]
R230 : 20k [ohm]
R231: 22k [ohm]
Resistor value
[BMKS]
R1028 : 4.7k [ohm]
R1107 : 0 [ohm]
R1050 : 20k [ohm]
R1051: 22k [ohm]