Sony KDL-40EX720 / KDL-46EX720 / KDL-55EX720 Service Manual ▷ View online
KDL-40/46/55EX720(K)
69
TROUBLE SHOOTING
5) 6 times blinking (Backlight Error)
6-time blinking
Check
the harness between
the T-con board and the
LED driver board.
Harness
Change G* board
G* Board
NG
Light Source
(Inside Panel Module)
Change LED driver
board
LED Driver Board
NG
Check FFC connection between
the LED driver board and
the light source
(inside the panel module)
FFC Connection
NG
NG
OK
OK
Symptom
improvement
improvement
Symptom
improvement
improvement
Change B*
board
B* Board
Symptom
improvement
improvement
KDL-40/46/55EX720(K)
70
TROUBLE SHOOTING
6) 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
7) 8 times blinking (Software Error)
8 times blinking
If the Symptom
Improved by changing
the WIFI module
B* Board
NO
WIFI Module
YES
KDL-40/46/55EX720(K)
71
TROUBLE SHOOTING
8) 10 times blinking (Emitter Error)
10 times blinking
Check
the harness between
the T-con Board and
the HEM2 Board
Harness
NG
OK
Change HEM2 Board
HEM2 Board
OK
T-CON Board
NG
KDL-40/46/55EX720(K)
72
3-5. NO PICTURE
No Picture
Press HOME Key
OSD displayed?
Replace the B-T-con,
T-con-LD* FFC
G* Board
Check the G*-LD* Harness
No
Change B* Board
Change G* Board
B* Board
Harness
B-T-con,
T-con-LD* FFC
B* Board
LCD Panel
(T-con, LD*)
Yes
OK
NG
NG
OK
NG
OK
NG
OK
TROUBLE SHOOTING
Click on the first or last page to see other KDL-40EX720 / KDL-46EX720 / KDL-55EX720 service manuals if exist.