Panasonic Generation Plasma Display Television manual Tvsubon Fstbon

TV_SUB_ON (F_STB_ON)

The F-STB-ON voltage (3.2V) from pin 6 of connector P7 is applied to pin 23 of the Power CPU (IC501) on the P board. IC501 sends out commands to first turn on the primary circuit of the power supply, and then the circuit that allows the F_STB15V to develop.

1.The relay commands (high) from pins 11 and 12 of IC501 are used to trigger the relays RL402 and RL403.

2.A low from pin 16 of IC501 is used to turn on the power factor control IC (IC406) to generate the 395V DC.

3.A high from pin 15 of IC501 is used to turn on the V-low power control IC (IC520) to turn on the oscillator in the “Active Clamp Full Bridge System” circuit.

4.A low from pin 18 of IC501 is used to turn on the F_STB15V DC/DC converter Q556.

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