Panasonic TC-P50VT20 Technical Manual page 79

Power LED Error Code Definition (2 of 2)
POWER LED
ERROR CIRCUIT MONITORED
CODE
Scan Drive Circuit and
7 BLINKS Connection between the SC
board and the SM board.
Sustain Drive Circuit and
8 BLINKS Connection between the SS
board and the Panel.
Discharge Control Circuit
9 BLINKS
(IC9300)
10 BLINKS
11 Blinks Fan SOS
12 Blinks Sound SOS
CONDITIONS TRIGGERING
THE SHUTDOWN
Missing Vsus.
Abnormality of the scan circuit output, the 15V_F, the
scn_pro, and Vscn circuit.
Loose or open Connection between the SC board and the
SM board (SC41, SC42, SC46).
Open or loose connection between connectors SC2/P2
Wrong diagnostic by the D board
Defective panel
Abnormality of the sustain drive circuit.
Open or loose connection between the SS bd and FPCs
from the panel.
Open or loose connection between connectors C10/C20
Wrong diagnostic by the D board
Defective panel
Failure of IC9300
Wrong diagnostic by the D board
Abnormalities of the F+15V.

Reasons:

The P board is not generating the F+15V

SUB Voltages are affected by the K board or by
metal object present in the SD card slot..
Shorted Vsus (By the SS board or SC board).
Shorted Vda (By the panel, or any of the C board)
Wrong diagnostic by the A board.
Fans
A board
Connection and Cables between fans and A board
Pinched speaker wires
A board
Speakers
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