Sony KDL-65W850C / KDL-65W855C / KDL-65W857C / KDL-65W858C / KDL-65W859C / KDL-75W850C / KDL-75W855C Service Manual ▷ View online
25
Troubleshooting
5-times blinking
PANEL ID Check
Check I2C (Data & CLK)
At CL
XM-H/A/DT (BMX):
CL8411 &
CL8412
INIT_DONE
Check I2C (Data & CLK)
At CL
I2C Communication
Check I2C (Data & CLK)
At CL
I2C Error
Change B* Board
B-Board NG
Change FFC
FFC NG
Change FRC
FRC NG
OK
OK
OK
NG
NG
OK
OK
NG
NG
NG
3-2-3. LED BLINKING 5x (Panel Communication Error) – b) 12C Error
26
Troubleshooting
BMX Probing Points – I2C Line Check
BMX (A-Side)
CL8412
(I2C_S_CLOCK)
CL8411
(I2C_S_DATA)
27
Troubleshooting
3-2-4. LED BLINKING 6x (Backlight Error)
No
Harness /
Connection
broken
6-times blinking
Check
**JL9008
BL_ERR_DET
on B*Board
Check
harness/connection
G*board to B*Board
or
LD board to B*Board
G*Board
or LD?
Voltage ≥ 1.9 V
Symptom
Improvement
Harness
Change
harness
Change
B* board
B* Board
Harness /
Connection OK
No
improvement
PSU OK
Voltage < 1.8 V
**BMX: JL9008 BL_ERR_DET
Panel
Change
Panel
Symptom
Improvement
Visual Check LS Bar
FFC Conductive Copper
Peel Off?
Out1 & Out2 Check (LED_Output)
LD
G* Board
Yes
Suspect LS
Bar Broken
No
Improvement
Symptom
Improvement
Note: Board Details refer Section 3
main page.
28
Troubleshooting
BMX: B Side
JL9008
3-2-4. LED BLINKING 6x (Backlight Error)
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