Light Sensor Error - Sony X850E Series Service Manual

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7. LIGHT SENSOR ERROR

Backlight level does not change
when ambient light changed
Check UI setting and make
sure light sensor setting is
"ON"
Setting is "OFF"
Setting issue
Change setting to "ON"
Resistor value
[BMKS]
R1109 : 0 [ohm]
R1052 : 150k [ohm]
[BMKP]
R251 : 0 [ohm]
R233 : 150k [ohm]
XBR-65/75X850E
Setting is "ON"
Check harness connection
between B*board and Smart
Core
NG
Check harness connection
between B*board and H-
board
NG
Change harness between B*
board to Smart Core harness
NG
Change Smart Core
NG
Check resistor value on B*
board
OK
OK
Battery of remote commander
could be weak.
Change battery.
OK
Harness connection
issue
OK
B* board to Smart Core harness
issue
OK
Smart Core issue
NG
Parts issue
Change B* board
Main device issue
TROUBLE SHOOTING
46