Sony KDL-46HX820 / KDL-55HX820 Service Manual ▷ View online
SECTION 3
TROUBLESHOOTING
Troubleshooting
KDL- 46HX820, 55HX820
RM-GD017
3-1. Power Problem
3-2. Standby Led Blinking
3-2-1. 2-times blinking (Main Power Error)
No Power
Turn on the Switch
Check
SW OFF
2-times blinking
Check STBY 3.3V
Replace the Harness
Turn on the Switch
* Power Saving Switch
NG
NG
SW ON
Check REG12V
at pins 2/3 of
CN6001 on
the B* Board
G* Board
Replace the Harness
Between G* Board and
B* Board
NO 12V
NG
at 10 pin of CN6001
on the B* Board
G* Board
Between G* Board and
B* Board
NG
OK
Symptom
improvement
the B* Board
B* Board
Harness
12V OK
Symptom
improvement
Harness
B* Board
Power Saving Switch：Only for BAT-L model
(2b-1,2b-2,3a-1)
Segment
Size
B*
Board
Type
G*
Board
Type
2b-2
46
BATL
G5AW
-12-
2b 2
46
BATL
G5AW
2b-2
55
BATL
G6AW
3-2-2. 3-times blinking( DC Alert & Audio Error)
Troubleshooting
KDL- 46HX820, 55HX820
RM-GD017
3-times blinking
Check D+1 2V at
Check AUDIO+12.5V
at pin 8/9 of
CN6001 on
the B* Board
G* Board
DC_ALERT
AUDIO
NG
Check D+1.2V at
JL6007
on the B* Board
F6001,IC6005,etc
(B* Board)
Check +12.5V
at F4601 on
F4601,IC4601,etc
(B* Board)
NG
OK
OK
NG
Check +3.3V_MAIN
at JL9111 on
the B* Board
F6003,IC6003,etc
(B* Board)
the B* Board
(B Board)
IC4601,etc
(B* Board)
NG
OK
OK
Speaker
Check
Speaker Impedance
at SP Connector
(B Board)
OK
AUDIO
NG
at SP Connector
OK
Segment
Size
B*
Board
Type
G*
Board
Type
-13-
2b-2
46
BATL
G5AW
2b-2
55
BATL
G6AW
3-2-3. 4-times blinking (Balancer Error)
3-2-4. 4-times blinking (Including SPI Error)
F
(2b 1)
Troubleshooting
KDL- 46HX820, 55HX820
RM-GD017
4-times blinking
Check
4-times blinking
Symptom
improvement
Change
For (3a-1,3a-2,2b-2, 2b-3)
For (2b-1)
* Not applicable for these model
PANEL_FAIL at
JL6017
on the B* Board
B* Board
Below 0.84V
Check
PANEL_FAIL at
JL6017
on the B* Board
B* Board
Between
Below
0.84V
T-CON Board
T-con
Board
NG
Between 0.84V
Change G*
/and/or
G** Board
G*/and/or
G** Board
Symptom
improvement
Between
0.84V to
2.65V
Symptom
improvement
Change
LED Driver
Board
LED Driver
Between 0.84V
to 2.65V
to 2.65V
NG
Change
LED Driver Board
(LD)
LED Driver Board
(LD)
Symptom
improvement
Change G* Board
G* Board
NG
Board
Ch
k th h
Panel
(LD)
(LD)
Panel
Check the harness
between the T-con board and
the LED driver board,
between the G board and
the LED driver board
Harness
NG
the LED driver board.
Segment
Size
B*
Board
Type
G*
Board
Type
G**
Board
Type
-14 -
yp
yp
yp
2b-2
46
BATL
G5AW
2b-2
55
BATL
G6AW
G7A
3-2-5. 5-times blinking (T-con Error)
F
(3 1 3 2 2b 1 2b 2)
Troubleshooting
KDL- 46HX820, 55HX820
RM-GD017
Symptom
For (3a-1, 3a-2, 2b-1, 2b-2)
5-time blinking
Check
PANEL_VCC at pin 1
G* B
d
NG
RGB sensor Change
RGB Sensor
（ｂ） Only for (2b-1, 2b-2)
improvement
_
p
of CN6001 on
on the B* Board
G* Board
Replace the
Panel
(T-con)
change
B* Board
OK
NG
Symptom
Replace the
Harness Between
G*/G** and Panel
(a)
Harness
Panel
(T-con)
(a) exclude 60Hz Panel Model
Symptom
improvement
Symptom
improvement
NG
Replace
the LVDS Harness
LVDS Harness
Panel
(T con)
Symptom
improvement
NG
NG
Segment
Size
B*
Board
Type
G*
Board
Type
G**
Board
Type
-15 -
2b-2
46
BATL
G5AW
2b-2
55
BATL
G6AW
G7A
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