The Power On Circuit Explanation - Panasonic TH-42PX80U Service Manual

The Power On Circuit Explanation

The power command from the power switch on the S board or the remote control receiver on the K board is
provided to the CPU in the A board.
The CPU on the A board outputs the "PANEL_STB_ON" command and the "F_STB_ON" command.
The "PANEL_STB_ON" is provided to the D board to turn on the STB3.3V regulator. The output voltage is
applied to the CPU in the D board.
The "F_STB_ON" command is provided to the power supply to develop the F_STB+15V.
When the CPU on the D board is energized, it outputs the "PANEL_MAIN_ON" and the "POWER ON/OFF
Commands.
The PANEL MAIN ON command turns on the power supply circuit that outputs the Vsus, Vda, 15V, and 5V.
The POWER ON/OFF command turns on the Video/Panel Control and the Discharge Control circuits in the
D board.
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