JPS55110474A - Protective device for television receiver - Google Patents
Protective device for television receiverInfo
- Publication number
- JPS55110474A JPS55110474A JP1815679A JP1815679A JPS55110474A JP S55110474 A JPS55110474 A JP S55110474A JP 1815679 A JP1815679 A JP 1815679A JP 1815679 A JP1815679 A JP 1815679A JP S55110474 A JPS55110474 A JP S55110474A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- thyristor
- conducted
- horizontal
- power supply
- 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
Landscapes
- Details Of Television Scanning (AREA)
Abstract
PURPOSE:To protect CRT and to prevent overload of the horizontal output circuit, by stopping the operation of the horizontal circuit at a failure of flyback pulse and outputting the switch element with overcurrent at failure detection part. CONSTITUTION:The power supply input terminal 2a is grounded via the thyristor 10, the zener diode 18 is conducted only when the high voltage applied to CRT6 is excessively high, and the thyristor 10 is conducted by giving trigger signal to the gate of the thyristor 10 via the diode 22. Thus, the power supply voltage of the horizontal oscillation circuit 2 is lowered to the chassis potential through the resistor 12 and the thyristor 10 to stop horizontal oscillation. Further, the flyback pulse obtained from the secondary winding 5a is fed to the non-charging circuit 25 through rectification and smoothing with the diode 23 and the capacitor 24. If the circuit 25 is in short circuit failure, the horizontal circuit is overloaded, the power supply current is increased. When the voltage across the small resistor 26 exceeds a given value, the switching transistor 27 is conducted. Thus, the thyristor 10 is conducted and the voltage supply to the circuit 2 is stopped to avoid overload.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1815679A JPS592225B2 (en) | 1979-02-19 | 1979-02-19 | Television receiver protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1815679A JPS592225B2 (en) | 1979-02-19 | 1979-02-19 | Television receiver protection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55110474A true JPS55110474A (en) | 1980-08-25 |
| JPS592225B2 JPS592225B2 (en) | 1984-01-17 |
Family
ID=11963742
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1815679A Expired JPS592225B2 (en) | 1979-02-19 | 1979-02-19 | Television receiver protection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS592225B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58202667A (en) * | 1982-05-21 | 1983-11-25 | Matsushita Electric Ind Co Ltd | Protecting device of television receiver |
| JPS60246179A (en) * | 1984-05-10 | 1985-12-05 | アールシーエー トムソン ライセンシング コーポレイシヨン | Protecting circuit for video display unit |
| JPH0468667A (en) * | 1990-07-03 | 1992-03-04 | Mitsubishi Electric Corp | Horizontal circuit |
-
1979
- 1979-02-19 JP JP1815679A patent/JPS592225B2/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58202667A (en) * | 1982-05-21 | 1983-11-25 | Matsushita Electric Ind Co Ltd | Protecting device of television receiver |
| JPS60246179A (en) * | 1984-05-10 | 1985-12-05 | アールシーエー トムソン ライセンシング コーポレイシヨン | Protecting circuit for video display unit |
| JPH0468667A (en) * | 1990-07-03 | 1992-03-04 | Mitsubishi Electric Corp | Horizontal circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS592225B2 (en) | 1984-01-17 |
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