Light Sensor Error - Sony XBR-55X930D Service Manual

FLOW

7. LIGHT SENSOR ERROR

Backlight level does not
change when ambient light
changed
XBR-55/65X930D, 65X935D/937D, 75X940D
Setting is "ON"
Check UI setting and
make sure light sensor
setting is "ON"
Setting is "OFF"
Setting issue
Change setting to "ON"
Resistor value
[BMFW2/BM1]
R1079 : 0 [ohm]
R1090 : 150k [ohm]
* R1079 may be not mounted
[BFM/BM2]
R1029 : 0 [ohm]
R1109 : 0 [ohm]
R1052 : 150k [ohm]
* R1029, R1109 may be not mounted
Check harness
OK
connection between B-
board and SmartCore
NG
Check harness
OK
connection between B-
board and H-board
NG
Change harness
OK
between B-board to
SmartCore harness
NG
OK
Change SmartCore
NG
NG
Check resistor value on
B-board
OK
TROUBLE SHOOTING
Battery of remote commander
could be weak.
Change battery.
Harness connection
issue
B-board to SmartCore harness
issue
SmartCore issue
Parts issue
Change B-board
Main device issue
53