PANASONIC BLINK CODES
The number of flashes is an error code. Count the number of flash. It looks like one of the boards in your set is failing intermittently. Panasonic blink codes for a guide as a starting point. Exact board STILL has to be verified
1 time Blink: One blink of the power LED indicates a problem in the inverter circuit located on the LCD panel. The inverter board is not to be repaired in the field. Therefore a replacement is required
3 time Blinks: Three blinks of the power LED indicates an over-current or over-voltage condition in one of the DC supplies of the AP board. The AP board is repairable. Therefore the use of an ohmmeter and peak-hold-voltmeter is required to determine the cause of the shutdown. An over-voltage condition is definitely a defect of the AP board. An over-current condition may be due to a short circuit located in the AP board, A board, or the LCD panel.
Five, Seven, or Eight Blinks: The
A board is responsible for five, seven or eight blinks of the power LED. The
MAIN +3.3V, MAIN +5V, and MAIN +9V sources are all produced on the A board. The
detection input pins of the MPU, IC1100, monitor for their presence.
Four or Six Blinks: The AP
board is responsible for four or six blinks of the power LED. The DTV9V, and
SUB_5V sources are produced on the AP board. The MPU IC1100 monitors for their
presence when the unit is connected to AC Power. A short or open circuit on the
A board may also be responsible for their absence.
Nine Blinks: Nine blinks
of the power LED is due a short circuit in the audio output circuit (s) of the
unit. The audio output circuit is located on the A board. Confirm the status of
the speakers. If defective, perform a replacement. If ok, replace the A board.
Ten Blinks: Ten blinks of
the power LED indicates a malfunction of IC4200, the frame converter. This IC
resides on the A board. Therefore ten blinks of the power LED requires the
replacement of the A board.
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