JPS5548765A - Lamp regulator of copying machine - Google Patents
Lamp regulator of copying machineInfo
- Publication number
- JPS5548765A JPS5548765A JP12131278A JP12131278A JPS5548765A JP S5548765 A JPS5548765 A JP S5548765A JP 12131278 A JP12131278 A JP 12131278A JP 12131278 A JP12131278 A JP 12131278A JP S5548765 A JPS5548765 A JP S5548765A
- Authority
- JP
- Japan
- Prior art keywords
- lamp
- output
- voltage
- circuit
- regulator
- 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
- Control Or Security For Electrophotography (AREA)
- Exposure Or Original Feeding In Electrophotography (AREA)
Abstract
PURPOSE:To achieve the improvement in the space factor of the lamp regulator and the reduction of its cost by so constituting the same that the signal detecting the abnormality of the lamp is emitted from the lamp regulator which sends a constant voltage to the lamp. CONSTITUTION:The voltage generated across a lamp L is led to a smoothing circuit consisting of a capacitor 72, resistances 73, 74 by way of a full-wave rectifying diode bridge 27 and diode 71. When the smoothed output becomes more than the specified value, the transistor 70 of an abnormality detecting circuit 70 goes ON. As a result, the transistor 81 of an output circuit 80 goes ON and an output is produced from its output terminal 17. Hence, at such a time when the voltage across the lamp L becomes abnormally high, the output voltage of the diode bridge 27 becomes large and therefore the output signal is outputted by the abnormality detecting circuit 70 and output circuit 80, whereby the operation of the copying machine unit is stopped. In this way, the improvement in the space factor of the lamp regulator and the reduction of its cost are made possible.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12131278A JPS5548765A (en) | 1978-10-02 | 1978-10-02 | Lamp regulator of copying machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12131278A JPS5548765A (en) | 1978-10-02 | 1978-10-02 | Lamp regulator of copying machine |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5548765A true JPS5548765A (en) | 1980-04-08 |
Family
ID=14808117
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12131278A Pending JPS5548765A (en) | 1978-10-02 | 1978-10-02 | Lamp regulator of copying machine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5548765A (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS509980A (en) * | 1973-05-31 | 1975-01-31 | ||
JPS5176872A (en) * | 1974-12-26 | 1976-07-03 | Olympus Optical Co | Hakunetsudenkyuno tentosochi |
JPS534229B1 (en) * | 1971-02-04 | 1978-02-15 |
-
1978
- 1978-10-02 JP JP12131278A patent/JPS5548765A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS534229B1 (en) * | 1971-02-04 | 1978-02-15 | ||
JPS509980A (en) * | 1973-05-31 | 1975-01-31 | ||
JPS5176872A (en) * | 1974-12-26 | 1976-07-03 | Olympus Optical Co | Hakunetsudenkyuno tentosochi |
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