JPS57120949A - Control circuit for copying machine - Google Patents

Control circuit for copying machine

Info

Publication number
JPS57120949A
JPS57120949A JP56007483A JP748381A JPS57120949A JP S57120949 A JPS57120949 A JP S57120949A JP 56007483 A JP56007483 A JP 56007483A JP 748381 A JP748381 A JP 748381A JP S57120949 A JPS57120949 A JP S57120949A
Authority
JP
Japan
Prior art keywords
copying machine
turned
output
control circuit
constitution
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP56007483A
Other languages
Japanese (ja)
Inventor
Shunichi Abe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Konica Minolta Inc
Original Assignee
Konica Minolta Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Konica Minolta Inc filed Critical Konica Minolta Inc
Priority to JP56007483A priority Critical patent/JPS57120949A/en
Publication of JPS57120949A publication Critical patent/JPS57120949A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/50—Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control
    • G03G15/5004—Power supply control, e.g. power-saving mode, automatic power turn-off

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Control Or Security For Electrophotography (AREA)

Abstract

PURPOSE:To make the constitution of a control circuit for copying machine simple and small-sized by, by detecting the time, when a driving AC power source or a pulsating power source output approximates 0 volt, to generate a turn-on/ off signal of a load. CONSTITUTION:When the output voltage of an AC power source 10 for driving a copying machine approximates 0 volt, a transistor TR3 of a voltage check circuit 91 for full-wave rectification of the output from a transformer 14 is turned off, and a high-level output is applied to a controller 41 from the circuit 91. When the controller 41 applies a low-level signal or the like to an inverter 31 in accordance with this applying of the high-level output, an LED2 and a photothyristor PS2 of a driver circuit 81 become unoperated, and a TRIAC Q2 is turned off, and load such as a motor 11 is turned off. Operations for other loads are similar, and respective loads are turned on similarly; and since it is unnecessary to provide a zero crossing detecting part for the purpose of preventing the noise for every driver, the constitution of the control circuit for copying machine becomes simple and small-sized.
JP56007483A 1981-01-21 1981-01-21 Control circuit for copying machine Pending JPS57120949A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56007483A JPS57120949A (en) 1981-01-21 1981-01-21 Control circuit for copying machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56007483A JPS57120949A (en) 1981-01-21 1981-01-21 Control circuit for copying machine

Publications (1)

Publication Number Publication Date
JPS57120949A true JPS57120949A (en) 1982-07-28

Family

ID=11667006

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56007483A Pending JPS57120949A (en) 1981-01-21 1981-01-21 Control circuit for copying machine

Country Status (1)

Country Link
JP (1) JPS57120949A (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52142520A (en) * 1976-05-23 1977-11-28 Ricoh Co Ltd Timing signal generator for copying machine
JPS52142519A (en) * 1976-05-23 1977-11-28 Ricoh Co Ltd Timing signal generator for copying machine
JPS52147756A (en) * 1976-06-04 1977-12-08 Ricoh Co Ltd Zero volt trigger method in ac load
JPS5335548A (en) * 1976-09-13 1978-04-03 Ricoh Co Ltd Sequence controller of copying machines
JPS53121622A (en) * 1977-03-31 1978-10-24 Ricoh Co Ltd Sequence control method of copying machine
JPS53148921A (en) * 1977-05-31 1978-12-26 Canon Inc Power unit

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52142520A (en) * 1976-05-23 1977-11-28 Ricoh Co Ltd Timing signal generator for copying machine
JPS52142519A (en) * 1976-05-23 1977-11-28 Ricoh Co Ltd Timing signal generator for copying machine
JPS52147756A (en) * 1976-06-04 1977-12-08 Ricoh Co Ltd Zero volt trigger method in ac load
JPS5335548A (en) * 1976-09-13 1978-04-03 Ricoh Co Ltd Sequence controller of copying machines
JPS53121622A (en) * 1977-03-31 1978-10-24 Ricoh Co Ltd Sequence control method of copying machine
JPS53148921A (en) * 1977-05-31 1978-12-26 Canon Inc Power unit

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