Sony KDL-32HX750 / KDL-40HX750 / KDL-46HX750 / KDL-55HX750 Service Manual ▷ View online
KDL-32/40/46/55HX750(K)
105
TROUBLE SHOOTING
4) 6 times blinking (Backlight Error)
6 time blinking
Check
BACKLIGHT_MON
at JL6017
on B* board
B* board
Under 2.65V
NG
Over 2.65V
Light source
(Inside Panel module)
Check the connection
between G* board and
the light source
(inside the panel module).
NG
LS connection
Check the harness
between G* board
and B* board.
G-B harness
NG
OK
3a’s G* will go into the backlight error when
BL_ON = 3.3 V and PWM_DIMMER = 0 V.
BL_ON = 3.3 V and PWM_DIMMER = 0 V.
BL_ON: G* CN6401#5
PWM_DIMMER: G* CN6401#2
PWM_DIMMER: G* CN6401#2
Tcon board
Symptom
improvement
improvement
Change Tcon board
Replace
the LVDS FFC
LVDS FFC
Symptom
improvement
improvement
NG
G* board
Symptom
improvement
improvement
Change G* board
NG
KDL-32/40/46/55HX750(K)
106
TROUBLE SHOOTING
5) 7 times blinking (Temperature Error)
7 times blinking
Setting circumstance
is OK?
Temperature,
Ventilation, etc.
Set to another
Location, etc.
NO
YES
Change B* Board,
and Aging a few hours
B* Board
OK
Panel
6) 8 times blinking (Software Error)
8 times blinking
If the Symptom
Improved by changing
the WIFI module
B* Board
NO
WIFI Module
Symptom
improvement
improvement
KDL-32/40/46/55HX750(K)
107
TROUBLE SHOOTING
7) 10 times blinking (3D Emitter Error)
10 times blinking
Harness/FFC
NG
OK
Change HEM* Board
HEM* Board
OK
T-CON Board
NG
Check the FFC between
Tcon board and B* board,
and the harness between
B board and HEM* board.
KDL-32/40/46/55HX750(K)
108
3-5. POWER (Green) LED BLINKING
POWER (Green) blinking
T-con
(Panel module)
Remove the LVDS FFC.
And recheck the impedance.
Check
the impedance between
TCON_VCC (CN6401#19)
and GND (CN6401#12)
G* Board
B* Board
Non-Stop blinking
TROUBLE SHOOTING
< 200 Ohm
>= 200 Ohm
< 200 Ohm
>= 200 Ohm
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