JPH0227164U - - Google Patents
Info
- Publication number
- JPH0227164U JPH0227164U JP10433988U JP10433988U JPH0227164U JP H0227164 U JPH0227164 U JP H0227164U JP 10433988 U JP10433988 U JP 10433988U JP 10433988 U JP10433988 U JP 10433988U JP H0227164 U JPH0227164 U JP H0227164U
- Authority
- JP
- Japan
- Prior art keywords
- heater lamp
- soft start
- current
- detection mechanism
- relay
- 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.)
- Granted
Links
- 238000001514 detection method Methods 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 238000005070 sampling Methods 0.000 description 1
Landscapes
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Fixing For Electrophotography (AREA)
- Control Of Resistance Heating (AREA)
Description
第１図は本考案になるヒータランプとソフトス
タート抵抗の断線検出機構を付加したヒータラン
プの駆動回路図、第２図は第１図の駆動回路にお
いてヒータランプに流れる電流波形概略図、第３
図は従来例におけるヒータランプとソフトスター
ト抵抗の断線検出機構を付加したヒータランプの
駆動回路図である。図において、１０１はヒータ
ランプ、１０２はソフトスタート抵抗、１０３は
ヒータランプ駆動リレー、１０４はソフトスター
トリレー、１０５はサンプリング抵抗、１０６は
電源、１０７は電圧検出器、１０８はマイクロコ
ンピユータ、１０９は表示装置、１１０は電流検
出機構、２０１はヒートランプとソフトスタート
が正常時にヒータランプに流れる電流波形、２０
２はソフトスタート抵抗が断線している時の電流
波形、２０３はヒータランプが断線している場合
、又はソフトスタート抵抗とヒータランプが共に
断線している場合の電流波形、３０１は電圧検出
器である。
Fig. 1 is a drive circuit diagram of a heater lamp according to the present invention with a disconnection detection mechanism for the heater lamp and soft start resistor, Fig. 2 is a schematic diagram of the current waveform flowing through the heater lamp in the drive circuit of Fig. 1, and Fig.
The figure is a drive circuit diagram of a heater lamp in a conventional example to which a disconnection detection mechanism for a heater lamp and a soft start resistor is added. In the figure, 101 is a heater lamp, 102 is a soft start resistor, 103 is a heater lamp drive relay, 104 is a soft start relay, 105 is a sampling resistor, 106 is a power supply, 107 is a voltage detector, 108 is a microcomputer, and 109 is a display device, 110 is a current detection mechanism, 201 is a current waveform flowing through the heater lamp when the heat lamp and soft start are normal, 20
2 is the current waveform when the soft start resistor is disconnected, 203 is the current waveform when the heater lamp is disconnected or both the soft start resistor and the heater lamp are disconnected, and 301 is the voltage detector. be.
Claims (1)
タランプと、該ヒータランプに電流を流す回路と
、該回路を開閉するヒータランプ駆動リレーと、
該回路の流れる電流を検出機構と、該回路に直列
に接続したソフトスタート抵抗と、該ソフトスタ
ート抵抗の両端を短絡・開放するソフトスタート
リレーと、マイクロコンピユータと表示装置を有
する電子写真印刷装置において、該２つのリレー
の状態と、該回路電流検出機構による出力から、
ヒータランプ及びソフトスタート抵抗の断線を検
出することを特徴とする電子写真印刷装置のヒー
タランプ断線検出機構。 ２ ソフトスタートリレーが開放の状態でヒータ
ランプを接続した場合に、電流検出機構によりヒ
ータランプに流れる電流が検出された場合はヒー
タランプとソフトスタート抵抗がともに正常であ
り、ソフトスタートリレーが開放の状態でヒータ
ランプ駆動リレーを接続した場合に電流検出機構
によりヒータランプに流れる電流が検出されない
場合でかつソフトスタートリレーを接続した場合
に電流が検出された場合はソフトスタート抵抗が
断線、ヒータランプは正常であり、電流が検出さ
れない場合はヒータランプが断線、又は、ヒータ
ランプとソフトスタート抵抗がともに断線してい
ると判断することを特徴とする請求項１記載の電
子写真印刷装置のヒータランプ断線検出機構。 ３ ヒータランプ駆動リレーとソフトスタートリ
レーの状態と、電流検出機構による出力の関係を
マイクロコンピユータで演算し、ヒータランプ及
びソフトスタート抵抗の断線を表示装置に表示す
ることを特徴とする請求項１記載の電子写真印刷
装置のヒータランプ断線検出機構。[Claims for Utility Model Registration] 1. A heater lamp that generates heat by passing a current through a metal wire, a circuit that passes current through the heater lamp, and a heater lamp drive relay that opens and closes the circuit.
An electrophotographic printing device having a mechanism for detecting the current flowing through the circuit, a soft start resistor connected in series to the circuit, a soft start relay for shorting and opening both ends of the soft start resistor, a microcomputer, and a display device. , from the states of the two relays and the output from the circuit current detection mechanism,
A heater lamp disconnection detection mechanism for an electrophotographic printing apparatus, which detects disconnection of a heater lamp and a soft start resistor. 2 If the heater lamp is connected with the soft start relay open, and the current detection mechanism detects the current flowing through the heater lamp, both the heater lamp and the soft start resistor are normal, and the soft start relay is open. If the current detection mechanism does not detect the current flowing to the heater lamp when the heater lamp drive relay is connected in this state, and a current is detected when the soft start relay is connected, the soft start resistor is disconnected and the heater lamp is disconnected. The heater lamp disconnection of the electrophotographic printing apparatus according to claim 1, wherein if the heater lamp is normal and no current is detected, it is determined that the heater lamp is disconnected or both the heater lamp and the soft start resistor are disconnected. Detection mechanism. 3. According to claim 1, the relationship between the states of the heater lamp drive relay and the soft start relay and the output from the current detection mechanism is calculated by a microcomputer, and disconnection of the heater lamp and the soft start resistor is displayed on a display device. Heater lamp disconnection detection mechanism for electrophotographic printing equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10433988U JPH0626924Y2 (en) | 1988-08-06 | 1988-08-06 | Heater lamp burnout detection mechanism for electrophotographic printer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10433988U JPH0626924Y2 (en) | 1988-08-06 | 1988-08-06 | Heater lamp burnout detection mechanism for electrophotographic printer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0227164U true JPH0227164U (en) | 1990-02-22 |
| JPH0626924Y2 JPH0626924Y2 (en) | 1994-07-20 |
Family
ID=31335966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10433988U Expired - Lifetime JPH0626924Y2 (en) | 1988-08-06 | 1988-08-06 | Heater lamp burnout detection mechanism for electrophotographic printer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0626924Y2 (en) |
-
1988
- 1988-08-06 JP JP10433988U patent/JPH0626924Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0626924Y2 (en) | 1994-07-20 |
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