Sony KDL-32HX750 / KDL-40HX750 / KDL-46HX750 / KDL-55HX750 Service Manual ▷ View online
KDL-32/40/46/55HX750(K)
101
TROUBLE SHOOTING
3-3. NO POWER
No power
Check STBY_+3.3V
at 10 pin of CN6001
on the B* board
Harness
G* board
Replace the harness
between G* board and
B* board
B* board
NG
OK
NG
Symptom
improvement
improvement
Long AC off
(> 15 min.).
Power protection or
CPU abnormal stop
NG
OK
KDL-32/40/46/55HX750(K)
102
1) 2 times blinking (Main Power Error)
TROUBLE SHOOTING
3-4. STANDBY LED BLINK
2 times blinking
Check REG+12V at
pins 3/5 of
CN6001 on
the B* Board
B* Board
Harness
G* Board
Replace
Between G* Board to
B* Board Harness
12V NG
12V OK
NG
Symptom
improvement
improvement
KDL-32/40/46/55HX750(K)
103
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
CN6001 on
the B* Board
G* Board
Check +12.5V
at F4601 on
the B* Board
F4601,IC4601,etc
(B* Board)
DC_ALERT
NG
OK
AUDIO
AUDIO
FE/BE Communication
NG
OK
NG
OK
NG
OK
NG
OK
Other B* Board’s parts
(Audio, Tuner, HDMI Eq...)
KDL-32/40/46/55HX750(K)
104
TROUBLE SHOOTING
3) 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
about 12V : ex. 22” Model
NG
OK
NG
Symptom
improvement
improvement
Symptom
improvement
improvement
Symptom
improvement
improvement
NG
NG
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