CN201429925Y - Device for demonstrating theory and failure of remote-control color TV set - Google Patents
Device for demonstrating theory and failure of remote-control color TV set Download PDFInfo
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- CN201429925Y CN201429925Y CN2008201297744U CN200820129774U CN201429925Y CN 201429925 Y CN201429925 Y CN 201429925Y CN 2008201297744 U CN2008201297744 U CN 2008201297744U CN 200820129774 U CN200820129774 U CN 200820129774U CN 201429925 Y CN201429925 Y CN 201429925Y
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Abstract
The utility model mainly relates to the technical field of color TV theory demonstration in experimental teaching, in particular to a device for demonstrating theories and failures of a remote-controlcolor TV set, comprising a central processing unit (1). The device for demonstrating theories and failures of the remote-control color TV set is characterized in that the central processing unit (1)is connected with a high-frequency tuner (3) through an interface circuit (2), the high-frequency tuner (3) is connected with a singlechip (7) through a pre-intermediate-frequency circuit (4), the singlechip (7) is connected with the central processing unit (1) through a control wire and a data wire, and is connected with a display device (9) through a final video amplifier device (8). The devicefor demonstrating theories and failures of the remote-control color TV set employs computer auxiliary software to design circuits, and is characterized in that the structural allocation is reasonable,the circuits works stably, and the performance is reliable. Besides, failure demonstration points and waveform test points are arranged, thereby organically combining theoretical teaching with practical teaching about the remote-control color TV set, combining theories and material objects, and moving classrooms into laboratories.
Description
Technical field:
The utility model relates generally to the colour TV principle demonstration technical field in the experimental teaching, is specifically related to a kind of principle and malfunction demo device of remote control colour TV set.
Background technology:
When carrying out TV tech teaching and experimental real-training, because the complicacy of circuit diagram, the teacher often explains and publicises according to book, makes circuit theory and in kind the disengaging, and the student finds it difficult to learn, the difficult religion of teacher.Phenomenon during the fault that produces for various assemblies in the televisor is difficult to show on screen, can only rely on principle analysis to judge, and the student is difficult to accept.When carrying out real training, the student operates in the televisor material object, and signal flow is directly perceived and have a suitable operational danger.
Existing colour television set instructional device all is a desktop computer, and circuit board is of a size of 370 * 600mm, can only experimentize, and is not suitable for carrying out colour TV theory teaching and malfunction demo, and used movement adopts the TA two-chip computer.Colour television set is many, the fast electronic product that updates that uses of the new technology, and the suitable complicacy of internal circuit configuration, components and parts are constantly microminiaturized, and the teaching difficulty of course is big, the difficult religion of teacher, and the student finds it difficult to learn.
Summary of the invention:
The purpose of this utility model is to avoid the deficiencies in the prior art part and principle and malfunction demo device that a kind of remote control colour TV set is provided, thereby has solved problems of the prior art effectively.
The purpose of this utility model can be by realizing by the following technical solutions: the principle of described remote control colour TV set and malfunction demo device, comprise central processing unit (1), its characteristics are: described central processing unit (1) links to each other with high-frequency tuner (3) by interface circuit (2), high-frequency tuner (3) connects single-chip microcomputer (7) by pre-intermediate level circuit (4), single-chip microcomputer (7) links to each other with central processing unit (1) with data line by control line, and single-chip microcomputer (7) is looked by final stage and put device (8) and link to each other with display device (9).
Described central processing unit (1) periphery also is provided with Switching Power Supply (13), reset circuit (14), keyboard (15), storer (16) and remote control and receives head (17).High-frequency tuner (3) links to each other with receiving antenna.Single-chip microcomputer (7) also is provided with vertical output circuit (10), line output circuit (11) and high-tension circuit (12) with display device (9).Central processing unit (1) model is LC863528C.Single-chip microcomputer (7) model is LA76818A.
The beneficial effects of the utility model are: there are following advantage in the principle of described remote control colour TV set and malfunction demo device:
1, it adopts at present up-to-date, domestic colour television set to use the widest monolithic integrated optical circuit LA76818A of Sanyo to be signal processing system, cooperate the up-to-date microprocessor LC863528C of Sanyo, finish the iic bus control model, have the control of use and two kinds of functions of maintenance control.Automatically discern two kinds of standards of PAL/NTSC, outside adjustment point is almost nil, and peripheral cell is few, has improved the reliability of complete machine greatly.
2, New Television Technologies such as modern iic bus technology, Based Intelligent Control, telecontrol engineering, the superpower reception of image have been used in the design, in circuit theory diagrams and printed circuit diagram design, simulating signal and digital signal, high-frequency signal and low frequency signal, simulation ground and digitally isolation and interference problem have been solved well.
3, adopt CASE(Computer Aided Software Engineering) to carry out circuit design, complete machine structure is rationally distributed, circuit working is stable, dependable performance.Be provided with malfunction demo point and waveform testing point simultaneously.
4, its fault is provided with and demonstration employing pad breach, has avoided the employing loose contact that plug connector, switch caused and the phenomenon of signal radiation.It is simple that this device is provided with the fault method, easy to operate, provides most common failure 20 big classes, more than 160 of fault set-points.
5, it combines teaching, scientific research, production, has promoted school's characteristic reform in education.Solved present hyundai electronics information teaching and do not caught up with the contradiction that modern technologies develop with the training apparatus backwardness.The theory teaching and the practical teaching of colour television set are organically combined, theory combines with material object, the laboratory has been moved in the classroom, and on-the-spot teaching is all carried out in the teaching of curriculum in the laboratory, image, explains the principle of work and the maintenance technique of colour TV intuitively.Students'ability for practice and knowwhy all are improved.
Description of drawings:
Fig. 1 is a structural representation of the present utility model.
Embodiment:
Be described in further detail below in conjunction with the most preferred embodiment shown in the accompanying drawing:
Embodiment 1, see Fig. 1, the principle of described remote control colour TV set and malfunction demo device, comprise central processing unit 1, its characteristics are: described central processing unit 1 links to each other with high-frequency tuner 3 by interface circuit 2, high-frequency tuner 3 connects single-chip microcomputer 7 by pre-intermediate level circuit 4, and single-chip microcomputer 7 links to each other with central processing unit 1 with data line by control line, and single-chip microcomputer 7 is looked by final stage and put device 8 and link to each other with display device 9.
Described central processing unit 1 periphery also is provided with Switching Power Supply 13, reset circuit 14, keyboard 15, storer 16 and remote control and receives 17.High-frequency tuner 3 links to each other with receiving antenna.Single-chip microcomputer 7 also is provided with vertical output circuit 10, line output circuit 11 and high-tension circuit 12 with display device 9.Central processing unit 1 model is LC863528C.Single-chip microcomputer 7 models are LA76818A.
The principle of described remote control colour TV set and malfunction demo device, it becomes intermediate-freuqncy signal from the high-frequency TV signal that antenna receives after high frequency amplification, Frequency mixing processing tuner, put and Surface Acoustic Wave Filter amplification and frequency-selecting in pre-, enters N101 and handles.This machine small-signal is handled and is all finished in single-chip microcomputer 7.Its image medium-frequency signal through visual intermediate level circuit amplify, the synchro detection circuit demodulation, obtain vision signal and accompanying sound intermediate frequency signal.Its accompanying sound intermediate frequency signal is got back to and is carried out amplitude limit amplification and fm demodulation in the single-chip microcomputer 7, is demodulated to sound signal, through the volume control and the power amplification of single-chip microcomputer 7, promotes the loudspeaker sounding again.Its vision signal is also got back to and is carried out PAL/NTSC system colour decoding in the single-chip microcomputer 7, obtains R, G, B primary colour signal, enters final video amplifier again and amplifies excitation teletron three negative electrodes.The vision signal of AV terminal and interior vision signal are switched selection in video switch, the vision signal of choosing is delivered in the single-chip microcomputer 7, finish functions such as colour decoding.The small-signal of its row field deflection is handled and is also carried out in single-chip microcomputer 7.Vision signal is sent a row drive signal through field line synchronization circuit, and a drive signal is amplified through field output integrated circuit N451, produces vertical yoke current in field deflection coil, finishes field scan.The duty of horizontal-drive signal control line output valve forms the horizontal deflection electric current in horizontal deflection, finish line scanning.Simultaneously, line output transformer is also respectively organized operating voltage for teletron provides.Its switching power circuit is many group DC voltage with the alternating current 220V voltage transformation, is respectively complete machine each several part circuit supply.
Claims (6)
1. the principle of a remote control colour TV set and malfunction demo device, comprise central processing unit (1), it is characterized in that: described central processing unit (1) links to each other with high-frequency tuner (3) by interface circuit (2), high-frequency tuner (3) connects single-chip microcomputer (7) by pre-intermediate level circuit (4), single-chip microcomputer (7) links to each other with central processing unit (1) with data line by control line, and single-chip microcomputer (7) is looked by final stage and put device (8) and link to each other with display device (9).
2. the principle of remote control colour TV set as claimed in claim 1 and malfunction demo device is characterized in that: described central processing unit (1) periphery also is provided with Switching Power Supply (13), reset circuit (14), keyboard (15), storer (16) and remote control and receives head (17).
3. the principle of remote control colour TV set as claimed in claim 1 and malfunction demo device, it is characterized in that: described high-frequency tuner (3) links to each other with receiving antenna.
4. the principle of remote control colour TV set as claimed in claim 1 and malfunction demo device is characterized in that: described single-chip microcomputer (7) also is provided with vertical output circuit (10), line output circuit (11) and high-tension circuit (12) with display device (9).
5. the principle of remote control colour TV set as claimed in claim 1 or 2 and malfunction demo device, it is characterized in that: described central processing unit (1) model is LC863528C.
6. as the principle and the malfunction demo device of claim 1 or 4 described remote control colour TV sets, it is characterized in that: described single-chip microcomputer (7) model is LA76818A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008201297744U CN201429925Y (en) | 2008-12-26 | 2008-12-26 | Device for demonstrating theory and failure of remote-control color TV set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008201297744U CN201429925Y (en) | 2008-12-26 | 2008-12-26 | Device for demonstrating theory and failure of remote-control color TV set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201429925Y true CN201429925Y (en) | 2010-03-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008201297744U Expired - Fee Related CN201429925Y (en) | 2008-12-26 | 2008-12-26 | Device for demonstrating theory and failure of remote-control color TV set |
Country Status (1)
| Country | Link |
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| CN (1) | CN201429925Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106060716A (en) * | 2016-06-12 | 2016-10-26 | 浪潮（苏州）金融技术服务有限公司 | Audio mike switching module applicable to financial self-service terminal equipment |
-
2008
- 2008-12-26 CN CN2008201297744U patent/CN201429925Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106060716A (en) * | 2016-06-12 | 2016-10-26 | 浪潮（苏州）金融技术服务有限公司 | Audio mike switching module applicable to financial self-service terminal equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100324 Termination date: 20101226 |