JPS55113969A - Malfunction detector for diode - Google Patents

Malfunction detector for diode

Info

Publication number
JPS55113969A
JPS55113969A JP2065679A JP2065679A JPS55113969A JP S55113969 A JPS55113969 A JP S55113969A JP 2065679 A JP2065679 A JP 2065679A JP 2065679 A JP2065679 A JP 2065679A JP S55113969 A JPS55113969 A JP S55113969A
Authority
JP
Japan
Prior art keywords
diode
light emitting
diodes
circuit
indicators
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
JP2065679A
Other languages
Japanese (ja)
Inventor
Takao Usui
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP2065679A priority Critical patent/JPS55113969A/en
Publication of JPS55113969A publication Critical patent/JPS55113969A/en
Pending legal-status Critical Current

Links

Landscapes

  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
  • Input From Keyboards Or The Like (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)

Abstract

PURPOSE: To prevent erroneous operation and erroneous stoppage of an entire control circuit using a diode matrix circuit by detecting the reverse short-circuit and opening circuit in the diode matrix.
CONSTITUTION: When a push-button switch 32 is pressed, a switching relay 16 is operated to connect light emitting diodes indicators 17W24 to the respective X-axis and Y-axis lines of a diode matrix circuit 50. At this time reverse voltage is applied to diodes 9W14 to detect the reverse shorting malfunction. That is, when the diode 9 is, for example, shorted, light emitting diode indicators 17, 21 turn on. After predetermined time is elapsed, a time limit relay 30 is operated to connect forwardly the light emitting diode indicators 25W28 to the diode matrix circuit 50. Thus, voltage is sequentially applied to the diodes 9W14, and the opening malfunctions of the diodes 9W14 are indicated by the light emitting diode indicators 17W20, 25W28.
COPYRIGHT: (C)1980,JPO&Japio
JP2065679A 1979-02-26 1979-02-26 Malfunction detector for diode Pending JPS55113969A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2065679A JPS55113969A (en) 1979-02-26 1979-02-26 Malfunction detector for diode

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2065679A JPS55113969A (en) 1979-02-26 1979-02-26 Malfunction detector for diode

Publications (1)

Publication Number Publication Date
JPS55113969A true JPS55113969A (en) 1980-09-02

Family

ID=12033250

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2065679A Pending JPS55113969A (en) 1979-02-26 1979-02-26 Malfunction detector for diode

Country Status (1)

Country Link
JP (1) JPS55113969A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4743843A (en) * 1984-08-31 1988-05-10 Mitsubishi Denki Kabushiki Kaisha Display signal generator device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4743843A (en) * 1984-08-31 1988-05-10 Mitsubishi Denki Kabushiki Kaisha Display signal generator device

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