JPS6448084A - Abnormal lighting controller for heater - Google Patents
Abnormal lighting controller for heaterInfo
- Publication number
- JPS6448084A JPS6448084A JP20481187A JP20481187A JPS6448084A JP S6448084 A JPS6448084 A JP S6448084A JP 20481187 A JP20481187 A JP 20481187A JP 20481187 A JP20481187 A JP 20481187A JP S6448084 A JPS6448084 A JP S6448084A
- Authority
- JP
- Japan
- Prior art keywords
- lamp
- abnormal
- heater
- lighting
- output
- 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
- 230000002159 abnormal effect Effects 0.000 title abstract 6
- 238000013021 overheating Methods 0.000 abstract 1
Landscapes
- Fixing For Electrophotography (AREA)
Abstract
PURPOSE:To quickly obstruct abnormal lighting, and also, to prevent damage caused thereby, by controlling the abnormal lighting of a heater, based on a device for detecting directly ON or OFF of the heater, and executing its control separately from a regular temperature control, after a copying operation is ended. CONSTITUTION:When a heat lamp 15 is lighted abnormally even if a signal 'L' of turn-off is applied to the heat lamp 15, an input and an output of a comparator 42 and an output of an FF 43 become abnormal, and when one input of a comparator 45 exceeds a comparison voltage, an output of the compa rator 45 becomes 'L'. This fall signal is transferred to a relay circuit 31 through a driver 46, and turns off the circuit 31. When this circuit 31 is turned off, the corresponding contact is opened, and an electric conduction line to the lamp 15 is cut off. In such a way, at the time of holding after a copy operation is ended, whether the lamp 15 follows up lighting control signals of 'H', 'L', 'H'... or not is checked, and when 'L' is lighted, it is decided to be abnormal lighting and the electric conduction line 20 is cut off immediately, therefore, abnormal overheating of the lamp 15, and damage to other apparatus can be prevented even if a software of an MPU 32 does not operate normally.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20481187A JPS6448084A (en) | 1987-08-18 | 1987-08-18 | Abnormal lighting controller for heater |
| US07/232,763 US4994852A (en) | 1987-08-18 | 1988-08-16 | Image forming apparatus having a malfunction detection device and power shutdown therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20481187A JPS6448084A (en) | 1987-08-18 | 1987-08-18 | Abnormal lighting controller for heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6448084A true JPS6448084A (en) | 1989-02-22 |
Family
ID=16496763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20481187A Pending JPS6448084A (en) | 1987-08-18 | 1987-08-18 | Abnormal lighting controller for heater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6448084A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5066337A (en) * | 1990-08-16 | 1991-11-19 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Thermal power transfer system using applied potential difference to sustain operating pressure difference |
| JP2005339297A (en) * | 2004-05-28 | 2005-12-08 | Fuji Xerox Co Ltd | Controller, and control program |
| JP2012078452A (en) * | 2010-09-30 | 2012-04-19 | Kyocera Mita Corp | Image forming device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6022168A (en) * | 1983-07-19 | 1985-02-04 | Canon Inc | Recording device safety device |
| JPS6386378A (en) * | 1986-09-30 | 1988-04-16 | キヤノン株式会社 | heating device |
-
1987
- 1987-08-18 JP JP20481187A patent/JPS6448084A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6022168A (en) * | 1983-07-19 | 1985-02-04 | Canon Inc | Recording device safety device |
| JPS6386378A (en) * | 1986-09-30 | 1988-04-16 | キヤノン株式会社 | heating device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5066337A (en) * | 1990-08-16 | 1991-11-19 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Thermal power transfer system using applied potential difference to sustain operating pressure difference |
| JP2005339297A (en) * | 2004-05-28 | 2005-12-08 | Fuji Xerox Co Ltd | Controller, and control program |
| JP2012078452A (en) * | 2010-09-30 | 2012-04-19 | Kyocera Mita Corp | Image forming device |
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