JPS55113969A - Malfunction detector for diode - Google Patents
Malfunction detector for diodeInfo
- 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
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
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4743843A (en) * | 1984-08-31 | 1988-05-10 | Mitsubishi Denki Kabushiki Kaisha | Display signal generator device |
-
1979
- 1979-02-26 JP JP2065679A patent/JPS55113969A/en active Pending
Cited By (1)
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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