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JPS56101158A - Power supply device of copying machine - Google Patents

Power supply device of copying machine

Info

Publication number
JPS56101158A
JPS56101158A JP257580A JP257580A JPS56101158A JP S56101158 A JPS56101158 A JP S56101158A JP 257580 A JP257580 A JP 257580A JP 257580 A JP257580 A JP 257580A JP S56101158 A JPS56101158 A JP S56101158A
Authority
JP
Japan
Prior art keywords
power supply
comparator
high voltage
voltage power
value
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
JP257580A
Other languages
Japanese (ja)
Inventor
Hiroshi Takayanagi
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.)
Fujifilm Business Innovation Corp
Original Assignee
Fuji Xerox Co Ltd
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 Fuji Xerox Co Ltd filed Critical Fuji Xerox Co Ltd
Priority to JP257580A priority Critical patent/JPS56101158A/en
Publication of JPS56101158A publication Critical patent/JPS56101158A/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
    • G03G15/80—Details relating to power supplies, circuits boards, electrical connections

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Control Or Security For Electrophotography (AREA)

Abstract

PURPOSE:To prevent trouble of high voltage power supply due to breakdown of corotron wires or the like, by integrating output current from the high voltage power supply, actuating a protective circuit when this integrated value exceeds a specified value, and stopping this power supply. CONSTITUTION:Low resistor 4 is inserted into the line of high voltage power supply 1 for the corotron, control current i1 is detected as a resistance across both the terminals of resistor 4, and this detected voltage is applied to integrating circuit 5. Clearance signals (e) are produced from controller 6 of the copier to reset the integrated values in integrating circuit 5 at start of copying and at intervals of a constant time length from the start. Integrated values (b) are compared to reference voltage V1 in comparator 7, and compared to reference voltage V2 lower than voltage V1 in comparator 9. When value (b) exceeds voltage V1, a signal is generated from comparator 7 to stop high voltage power supply 1. When value becomes smaller than V1 but greater than V2, necessary indication is made by warning output (d) from comparator 9.
JP257580A 1980-01-16 1980-01-16 Power supply device of copying machine Pending JPS56101158A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP257580A JPS56101158A (en) 1980-01-16 1980-01-16 Power supply device of copying machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP257580A JPS56101158A (en) 1980-01-16 1980-01-16 Power supply device of copying machine

Publications (1)

Publication Number Publication Date
JPS56101158A true JPS56101158A (en) 1981-08-13

Family

ID=11533165

Family Applications (1)

Application Number Title Priority Date Filing Date
JP257580A Pending JPS56101158A (en) 1980-01-16 1980-01-16 Power supply device of copying machine

Country Status (1)

Country Link
JP (1) JPS56101158A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63210956A (en) * 1987-02-27 1988-09-01 Mita Ind Co Ltd Relay abnormality detecting circuit for image forming device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63210956A (en) * 1987-02-27 1988-09-01 Mita Ind Co Ltd Relay abnormality detecting circuit for image forming device

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