Panasonic TC-P50S60 Technical Manual page 21

Standby Operation
TC-P42/50S60
When the TV is plugged in:
AC is applied to the standby circuit in the PSS board to produce STB5V.
The STB5V is provided to the A board via pin 22 of connector P6.
The STB5V from pin 22 of connector A6A is applied to the Analog ASIC (IC5000)
The Analog ASIC IC5000 converts the STB5V to STB3.3V.
This voltage energizes and prepare the microprocessor (CPU) IC8000 for program execution.
The STB3.3V from the Analog ASIC (IC5000), besides being applied to the CPU, is also applied to
the remote control receiver on the K board through pin 5 of connector A1/K10.
The microprocessor (IC8000) outputs the "F_STBY_ON" command for less than a second. This
command is applied to the PSS for F15V generation. The F15V is generated for the same duration
of the command.
Slide 21