Light Sensor Error - Sony XBR-65X930C Service Manual

3-8. LIGHT SENSOR ERROR

Backlight doesn't change
when ambient lighting
level changed
XBR-65X930C, 75X940C, 945C
Check UI setting for light
Sensor. Make sure it is "on"
OK
Change the UI setting
to "ON"
NG
OK
Harness on H-board and
B* Board properly connected
NG
OK
Change
H-B* board Harness
NG
OK
Change Smart Core
NG
B*Board
NG
Check LIGTH_SENSOR signal path :
R1079 = zero ohm
OK
LIGTH_SENSOR (Muffin Pin L35)
OK
Check voltage variation from
room light to dark condition
NG
Change B*Board
TROUBLE SHOOTING
User did not activate light
sensor function
Harness connection
issue
H-B* board harness
issue
Smart Core issue
Part broken issue
Muffin IC1000 problem
169