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Model
KDL-40HX850 KDL-40HX853 KDL-40HX855 KDL-46HX850 KDL-46HX853 KDL-46HX855 KDL-55HX850 KDL-55HX853 KDL-55HX855 (serv.man2)
Pages
127
Size
20.64 MB
Type
PDF
Document
Service Manual
Brand
Device
TV
File
kdl-40hx850-kdl-40hx853-kdl-40hx855-kdl-46hx850-kd.pdf
Date
PREV: Sony KDL-46HX850 / KDL-55HX850 (serv.man2) Service Manual

Sony KDL-40HX850 / KDL-40HX853 / KDL-40HX855 / KDL-46HX850 / KDL-46HX853 / KDL-46HX855 / KDL-55HX850 / KDL-55HX853 / KDL-55HX855 (serv.man2) Service Manual ▷ View online

KDL-40/46/55HX850,853,855(AEP/UK/IT)
113
TROUBLE SHOOTING
2) 3 times blinking (Main Board Error)
3 times blinking
Check D+1.2V at
JL6002
on the B* Board
F6001,IC6001,etc
(B* Board)
Speaker
Check +3.3V_MAIN
at JL6005 on
the B* Board
Check
Speaker Impedance
at SP Connector
F6003,IC6003,etc
(B* Board)
Check AUDIO+12.5V
at pin 2/4 of
CN6001 on
the B* Board
G* Board
Check +12.5V
at F4601/4701 on
the B* Board
F4601/4701,IC4601/4701,etc
(B* Board)
Other B* Board’s parts
(Audio, Tuner, HDMI Eq...)
DC_ALERT
NG
OK
AUDIO
AUDIO
FE/BE Communication
NG
OK
NG
OK
NG
OK
NG
OK
KDL-40/46/55HX850,853,855(AEP/UK/IT)
114
TROUBLE SHOOTING
3) 4 times blinking (LD Board Error)
4 time blinking
Check
BACKLIGHT_MON
at JL6017
on B* board
B* board
Between 0.84 V and 2.65 V
Below 0.84 V
Check the harness
between G* board
and LD board.
G-LD harness
NG
OK
Light source
(Inside Panel module)
Change LD Board
LD board
Check the FFC connection
between LD board and
the light source 
(inside the panel module).
LS FFC
connection
Change G* Board
G* board
Symptom 
improvement
NG
Check the FFC connection
between Tcon board and
LD board.
Tcon-LD FFC
connection
Change Tcon Board
Tcon board
OK
OK
NG
NG
NG
NG
Symptom 
improvement
Symptom 
improvement
KDL-40/46/55HX850,853,855(AEP/UK/IT)
115
TROUBLE SHOOTING
4) 5 times blinking (T-con Error)
5 time blinking
Check PANEL_VCC
at JL6001 on
on the B* Board
G* Board
Replace the Harness 
Between G* and Panel
(Only 3a-G)
Replace
the LVDS FFC
Panel (T-con)
change
B* Board
Harness
LVDS FFC
Panel (T-con)
about 5V : 22” Model
about 12V : ex. 22” Model
NG
OK
NG
Symptom 
improvement
Symptom 
improvement
Symptom 
improvement
NG
NG
KDL-40/46/55HX850,853,855(AEP/UK/IT)
116
TROUBLE SHOOTING
5) 6 times blinking (Backlight Power Error)
6 time blinking
Check
BACKLIGHT_MON
at JL6017
on B* board
B* board
Under 2.65V
Over 2.65V
Check the harness
between G* board
and B* board.
G-B harness
NG
OK
LD board
NG
G* board
Symptom 
improvement
Change G* board
Page of 127
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