Claims
- 1. A power-supply control apparatus comprising:
- power-supply means for supplying power;
- microcomputer for controlling power supply for a load and for said microcomputer itself;
- first switching means for outputting a predetermined signal to said microcomputer in accordance with a manual instruction;
- second switching means, controlled by said microcomputer, for supplying the power from said power-supply means to said microcomputer; and
- third switching means, controlled by said microcomputer, for supplying the power from said power-supply means to the load,
- wherein said microcomputer deactivates said second and third switching means in response to the output of the predetermined signal from said first switching means while said second switching means is in an activated state.
- 2. The power-supply control apparatus according to claim 1, wherein said first switching means includes a first transistor provided between said power supply means and said microcomputer and a push-on switch for changing state of said transistor to be conductive, and said second switching means includes said first transistor and a second transistor, controlled by said microcomputer, for making said first transistor be conductive.
- 3. The power-supply control apparatus according to claim 1, wherein said third switching means includes a relay circuit, provided between said power-supply means and the load, and a transistor, controlled by said microcomputer, for making said relay circuit be conductive.
- 4. The power-supply control apparatus according to claim 1, wherein said microcomputer is provided in a copying machine.
- 5. The power-supply control apparatus according to claim 1, wherein said microcomputer controls said second and third switching means in accordance with a predetermined program.
- 6. The power-supply control apparatus according to claim 4, further comprising a detecting means for detecting an unusual state of the copying machine,
- wherein said microcomputer deactivates said third switching means in response to a detection of the unusual state by said detecting means.
- 7. A power-supply control apparatus comprising:
- power-supply means for supplying power;
- microcomputer for controlling power supply for a load and for said microcomputer itself;
- first switching means for outputting a predetermined signal to said microcomputer in accordance with the manual instruction; and
- second switching means, controlled by said microcomputer, for supplying the power from said power-supply means to said microcomputer and the load,
- wherein said microcomputer deactivates said second switching means in response to the output of the predetermined signal from said first switching means while said second switching means is in an activated state.
- 8. The power-supply control apparatus according to claim 7, wherein said second switching means includes a relay circuit, provided between said power-supply means and the load, and a transistor, controlled by said microcomputer, for making said relay circuit be conductive.
- 9. The power-supply control apparatus according to claim 7, wherein said microcomputer is provided in a copying machine.
- 10. The power-supply control apparatus according to claim 7, wherein said microcomputer controls said second switching means in accordance with a predetermined program.
- 11. The power-supply control apparatus according to claim 9, further comprising a detecting means for detecting an unusual state of the copying machine,
- wherein said microcomputer deactivates said second switching means in response to a detection of the unusual state by said detecting means.
- 12. A power-supply control apparatus comprising:
- power-supply means for supplying power;
- microcomputer for controlling power supply for said microcomputer itself;
- first switching means for outputting a predetermined signal to said microcomputer in accordance with a manual instruction; and
- second switching means, controlled by said microcomputer, for supplying the power from said power-supply means to said microcomputer;
- wherein said microcomputer deactivates said second switching means in response to the output of the predetermined signal from said first switching means while said second switching means is in an activated state.
Priority Claims (1)
Number |
Date |
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Kind |
3-034052 |
Feb 1991 |
JPX |
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Parent Case Info
This application is a division of application Ser. No. 08/347,170 filed Nov. 22, 1994, now U.S. Pat. No. 5,670,832, which is a continuation of application Ser. No. 07/836,814 filed Feb. 19, 1992, now abandoned.
US Referenced Citations (15)
Foreign Referenced Citations (3)
Number |
Date |
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3928567 |
Mar 1990 |
DEX |
58-117562 |
Oct 1983 |
JPX |
2066737 |
Jul 1981 |
GBX |
Divisions (1)
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Number |
Date |
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Parent |
347170 |
Nov 1994 |
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Continuations (1)
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Number |
Date |
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Parent |
836814 |
Feb 1992 |
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