Read Panasonic LCD-201411 / AVC-201411 / AX900 Other Service Manuals online
Before SOS 1 time blinking, a white screen pattern appears. Checking with the
white pattern, the defective board can be judged.
white pattern, the defective board can be judged.
Jumper cable is required.
(Reference) New Check Mode for Backlight (Troubleshooting for LED 1 Time Blinking )
BL_TEST
Power on
(LED 1 Blink)
Dark White pattern
(Display time: 2, 3 sec)
Symptom
Board failure
1/8 of the screen area is un-lit
LD PCB
(Drive IC failure)
1/128 of the failure area is brightly lit
LD PCB
(Switching FET shorted)
Normal lighting
(It is difficult to detect one LED
un-lit by the white pattern)
LCD panel
(Backlight LED shorted)
No white pattern
AP or LD board
(check by previous page
troubleshoot)
< Starting method >
Short circuit between two Test Point
in FR board with jumper cable.
Short circuit between two Test Point
in FR board with jumper cable.
(“BL_TEST” and “SRV-3.3V”)
(See right photo)
White pattern
< Applicable Model : 55/65AX900 >
Jumper cable
FR board (65AX900)
SRV-3.3V
AX900
1/8
８
1/128
16
50
Click on the first or last page to see other LCD-201411 / AVC-201411 / AX900 service manuals if exist.