PANASONIC PLASMA - 9th GENERATION Troubleshooting _LED Blinking Codes

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          ISOLATION OF THE 'SC' BOARD

• Sometimes the TV goes into 'Shutdown' indicating that the problem is located on the 'SC' board.  This does not means that the 'SC' board is the cause of the problem.  When this occurs, disconnect both 'SU' and 'SC' boards from the 'SC' Board.  To disconnect, remove 2 screws holding each of these boards in place and disconnect {SC41, SU45, SD46 & SC42. 

Some times the TV may go into shutdown, when there is a scan problem.  This symptom seems to be caused by a defective 'D' or 'SC' board.  In reality, it is caused be the 'SU' board.  When this occurs, disconnect the 'SU' board from the 'SC' board.   Disconnecting 'SU' board yields a good picture at the bottom half of the screen and a completely black area in the upper half of the screen.

Screenshot due to defective SU Board.

Defects due to faulty 'SD' board.

Top half of the picture to be normal,  while the bottom is black. {2 examples}

LED BLINKING CODES & SUSPECTED LOCATIONS.

	D BOARD SOS DETECT
SOS LINE	LINE MONITORED	NUMBER OF BLINKS
SOS-2	15V	2
SOS 3	P3.3V [15V 7 STB 5V]	3
SOS 4	PS	4
SOS-5	5V	5
SOS-6	SC1	6
DRVRST	5V DET	6
SOS-7	SC2	7
SOS-8	SS	8
SOS 9	CONFG. DC LEVEL SHIFTER	9

	DG BOARD SOS DETECT
SOS LINE	LINE MONITORED	BLINKS
STB 3.3V DET	STB 3.3V	10
MAIN 3.3 DET	MAIN 3.3V	10
SUB 5V DET	SUB 5V	10
SUB 9V	SUB 9V	10
PA TUNER SOS	PA TUNER+30V	10
FAN SOS	FAN CIRCUIT	11
SOUND	SOUND OUT CIRCUIT	12