Troubleshooting 2 Blinks Error Code - Panasonic TC-P54Z1 Technical Manual

Troubleshooting 2 Blinks Error Code

These 3 conditions can cause the TV to shutdown and the power LED to blink 2 times
1. Missing P15V
2. A short of the P15V
3. Wrong diagnostic by the DA board
When troubleshooting a PDP TV that is shutting down and the power LED blinks 2 times:
Find out if 15V is output at pins 1~5 of connector P6 of the P board. If 15V is present, it's likely
that the DA board is defective.
If no voltage is output, determine if this is caused by the P board or the boards using the P15V.
The boards connected to the P15V can only affect the P15V if there is a short circuit drawing
excessive current.
To check for a short circuit, measure the resistance between any of the pins 1~5 of connector
P6 and ground (Chassis). If P15V is shorted, find out if the short is coming from the P board or
if it's coming from any of the other boards that the 15V volt is connected to.
If the P board is OK, disconnect the connectors providing the P15V to all these boards while
measuring resistance between any of the pins 1~5 of connector P6 and ground.
The defective board is found when the connector that provides the P15V to that board is
removed and the short circuit is no-longer present.
The boards that can possibly cause the TV to shutdown with 2 blinks of the power LED are:
SC – 80% Probability
P and DA – 50% Probability
SS – 20% Probability
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