JPS5453828A - High tension protective circuit - Google Patents
High tension protective circuitInfo
- Publication number
- JPS5453828A JPS5453828A JP12064477A JP12064477A JPS5453828A JP S5453828 A JPS5453828 A JP S5453828A JP 12064477 A JP12064477 A JP 12064477A JP 12064477 A JP12064477 A JP 12064477A JP S5453828 A JPS5453828 A JP S5453828A
- Authority
- JP
- Japan
- Prior art keywords
- turned
- time
- high tension
- pulse
- voltage
- 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
- Details Of Television Scanning (AREA)
Abstract
PURPOSE:To prevent surely the generation of an abnormal high tension by making a horizontal output circuit into a self-oscillation state at an anomaly time of this circuit in a TV receiver. CONSTITUTION:When the secondary-side voltage of fly-back transformer 10 is increased and the pulse voltage of coil 14 is detected by detector 21, switch 20 is turned off and the negative pulse voltage is applied to the base of horizontal drive transistor TR2. Then, TR2 is turned on in time T1, when TR2 should be turned off normally, by the voltage applied in time T2 by coil 12. When TR2 is turned on forcedly in the off time, horizontal output TR5 is changed to be turned off from an onstate, and a fly-back pulse is generated. Therefore, TR2 is turned off again; and when the pulse time is over, TR2 is turned on. By repeating this operation, horizontal output circuit 17 becomes a self-oscillation state, and a repeated frequency is increased, so that the high tension applied to CRT13 may be lowered.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12064477A JPS5453828A (en) | 1977-10-06 | 1977-10-06 | High tension protective circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12064477A JPS5453828A (en) | 1977-10-06 | 1977-10-06 | High tension protective circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5453828A true JPS5453828A (en) | 1979-04-27 |
Family
ID=14791316
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12064477A Pending JPS5453828A (en) | 1977-10-06 | 1977-10-06 | High tension protective circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5453828A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63135070A (en) * | 1986-11-26 | 1988-06-07 | Mitsubishi Electric Corp | High voltage stabilizing device |
-
1977
- 1977-10-06 JP JP12064477A patent/JPS5453828A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63135070A (en) * | 1986-11-26 | 1988-06-07 | Mitsubishi Electric Corp | High voltage stabilizing device |
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