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The operation of the plasma TV can be divided into 3 different sections:
1.
Power Supply Circuit
The power supply circuit board (P board) provides voltages to the Signal switching/processing circuit
and the Panel drive circuit.
2.
Signal Switching/Processing Circuit
Upon connecting the unit to the AC voltage source, the STB5V of the P board is provided to the A board
for system control operation. The F_STB15V is also provided to the signal switching/processing circuit
of the A board. It remains present for approximately 25 seconds unless the power button is pressed.
This circuit also receives 15V for audio operation and fan drive for models with fan.
3.
Panel Drive Circuit.
The Panel drive circuit receives the Vsus, Vda, 15V, and 5V sources from the P board when the unit is
in operation.
Overall Block Diagram
17
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Troubleshooting
