Television receiver standby power supply

Details Television receiver standby power supply Television receiver standby power supply

1985-12-19

1988-06-14

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

307 64, H04N 318

Patent

active

047515805

ABSTRACT:
In a standby power supply for a television receiver, a rectifier arrangement, electrically nonisolated from a source of AC mains supply voltage, develops a first, nonisolated direct voltage that is present during both the on-state and the standby state of an on-off command signal generated by a remote control circuit. The primary winding of a standby transformer is coupled to the rectifier arrangement and to the AC voltage source for developing a second, nonisolated direct voltage of lower magnitude than the first direct voltage. The control circuit of a switched mode power supply is energized by the second direct voltage and is responsive to the on-off command signal for changing operation of the switched mode power supply between a standby mode and a run-mode. An electrically isolated secondary winding of the standby transformer develops a third direct voltage for energizing the remote control circuit during standby.

REFERENCES:
patent: 4115704 (1978-09-01), Hannemann et al.
patent: 4468571 (1984-08-01), Heavey et al.
patent: 4500923 (1985-02-01), Duvall et al.
A Hitachi CPT 2588, CPT 2888 Color Television Service Information Manual, Including a Schematic of the H-5 Chassis.
RCA Color Television Basic Service Data CTC 133 Series, published by RCA Corporation, Consumer Electrics, Indianapolis, In., dated 1985.

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