Television power supply turn-on protection circuit

Details Television power supply turn-on protection circuit Television power supply turn-on protection circuit

1985-04-29

1987-04-07

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Power supply from deflection circuit source

358190, H01J 2970

Patent

active

046563997

ABSTRACT:
A power supply for a television deflection apparatus is turned-on by a user initiated turn-on command. A fault detection circuit samples a voltage derived from the deflection circuit at the end of a predetermined interval that follows the turn-on command. The fault detection circuit issues a turn-off command to immediately shutdown the power supply, if such voltage is below a predetermined level indicative of a fault condition.

REFERENCES:
patent: 3725739 (1973-04-01), Griffey
patent: 3970915 (1976-07-01), Suchko
patent: 4042858 (1977-08-01), Collette et al.
patent: 4045742 (1977-08-01), Meehan et al.
patent: 4115814 (1978-09-01), Kosaka et al.
patent: 4435731 (1984-03-01), Kliebphipat et al.
patent: 4489394 (1984-12-01), Borg
patent: 4516168 (1985-05-01), Hicks
U.S. Patent Application Ser. No. 728,657, entitled Television Power Supply Shutdown Circuit in the names of W. J. Testin et al., filed concurrently with the above-captioned patent application.
U.S. Patent Application Ser. No. 445,776, entitled Shutdown Circuit For A Switching Regulator In A Remote Controlled Television Receiver, in the name of J. E. Hicks filed Nov. 30, 1982.
Technical Information Report No. 006, "Switching Regulator Control IC (AN5900)", Semiconductor Division Matsushita Electronics Corporation, published prior to the filing date of this U.S. patent application.
Color Television Basic Service Data Manual for CTC 111 Chassis Series, Cover Sheet and Schematic, pp. 36, 37 of MSC 025 F. S. Tuner Control Module.

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