Overview of products
The "study examination device for advanced workers-technologists in domestic electronics" is a product developed in accordance with the technical guidelines for physical training and identification of equipment for vocational skills for the maintenance of domestic electronics, issued by the ministry of labour and social security of the people's republic of china. Practical instruction in the principles of television and maintenance, and the principles and maintenance of household electronics, which are suitable for applications of electronics, electronics applications and maintenance in higher educational institutions, vocational schools, etc。
This practical training device is also suitable for technical schools, vocational training schools, vocational centres, appraisal stations/centres specializing in electronics and the maintenance of audio-visual maintenance for electricians, as well as for skills appraisal examinations for advanced workers and technicians。
Ii. System characteristics
Intelligentity the device uses an intelligent, networked hands-on appraisal system, where failure points are placed on a computer by the teacher in accordance with the requirements of the appraisal, which is transmitted to the student's television hands-on module through the appraisal system, and where the student uses a computer or a answering machine for answering questions and setting back. At the same time, time and number of delays are monitored and recorded。
The hands-on training units use isolation transformers to isolate the power supply and provide leak protection to ensure safe use by students. The open panel contains complete signal circuit maps, test points and adjustment points。
In accordance with job identification requirements, a typical random failure point has been set up, with hands-on content, requirements and knowledge points, instrument configuration, hands-on examination steps, hands-on data, results, etc., carefully designed to complete students ' training in a wide range of skills, such as cognitive, installation, debugging, maintenance, etc。
Complementarity meets the practical training objectives of the respective curricula of schools. The devices are modularized, connected from power to module, module to module and other components, are fully equipped with dedicated guidance lines, and the performance, specifications, etc. Of the components are closely aligned with the requirements of hands-on training, and detailed hands-on guidance fully meets the requirements of hands-on training。
Iii. Technical capacity
Input power source: single-phase 3 lines ~ 220 v > 10% 50 hz
Working environment: temperature -10°c +40°c relative humidity <85% (25°c) altitude <4000m
Whole capacity: <300va
Safety protection: action current 30 ma, action time 0. 1s
Iv. System composition
This device consists of four components of a hands-on control screen, a video tube, a 32-inch lcd monitor and a hands-on component
(i) hands-on control screens (iron double-layer sub-photogram structures, aluminium panels)
Communication power (all with overflow protection)
Output power: municipal electricity does not isolate output 220v/50hz
Isolated transformer output 220v/50hz
Lcd tv special power
Extension power module
Communication power 14. 5v/50hz
Direct current power source ±16v/±12v
Remotely controlled power supply
Colour signal generator
Output frequency range: channel 12
Television signal formats: 16 types of round, dot, grid, black and white, colour, monochrome, etc., can be selected directly by key
Output signal: video, acoustic (medium frequency 6. 5m), radio frequency interface
Signal formula: pal-d/k
Smart appraisal interface modules: answering machine interface, pc serial interface, colour module interface
(ii) visible tubes: 21 inches of straight-angle plane cavity tubes (wine tubes), inner-disposed magnetic wires。
(iii) 32-inch lcd monitor
Contrast: 600:1
Resolution: 1366 x 768
Response time: <16ms
Screen brightness: 500cd/m2
Perspective: >160 degrees
Picture ratio: 16:9
Format: ntsc/pal/secam
Inputs: tv, av, s-video, vga, ypbpr
Audio: srs wow 3d space around sound
(iv) training modules
It consists of dvd modules, loudspeakers groups, smart hands-on examination modules, toshiba superchip remote palette module, i2c remote palette module, 32-inch lcd board module, etc. The hands-on module has two dimensions of circuit boards, 600 mm x 370 mm and 345 mm x 205 mm, respectively。
I2c remote colour module
It consists of a three-ocean monograph circuit (la76810) and a three-ocean monolithic remote-controlled circuit (lc863528c-55k7), with features such as high integration, greatly simplified circuits, i2c bus control, full remote control, automatic storage。
Tung chi superchip remote color module
Using toshiba 8873-cscng6pr6, it has high integration, simple circuits, internal i2c bus control, full remote control, automatic storage。
32-inch lcd television module
Audio and video processing uses the popular mst9e19b processing chip, while audio applications use the efficient tpa300x series. The entire machine is designed in an open design, with simple lines, powerful functions and high performance characteristics。
Dvd module: dvd core and server circuits, dvd keyboard control, display and remote control, dvd built-in voltage power, dvd cd-rom。
Speaker group module: right-and-right stereo speakers (speaker boxes are stand-alone organic glass boxes)。
The system consists of a teacher machine, a smart hands-on board (inline), a smart hands-on system software with a smart answering machine. The answering machine consists of a 240 x 128 point blue-seated back-back liquid crystal screen, pvc light-touch keyboard, microprocessor, memory, communication module. The system can perform malfunctions through keyboards or teachers ' machines, students can perform failure detections on the physical station's electrical circuits, and answers and related information are transmitted through answering machines to teachers ' machines, which automatically rate the content of their examinations on the basis of information uploaded by students and keep the results available for search or printing. Performance of automated monitoring and identification of equipment, recurrence of error sequences for the actual training counter, troubleshooting and counting of failure points, automatic preservation of papers, non-loss of electricity, avoidance of problems, automatic preservation of the number, class, response, error, test time, alarm recording and rating of results for each examiner, calendar, clock, countdown, volume, submission and personal login password for the examination counter。
(v) training desk
The whole is based on the landing table structure, with a four million-way wheel and four fixed adjusters, which are easy to move and fix and facilitate laboratory layout. Desktops are waterproof, fireproof, resistant to high-density plates, structurally robust and stylish。
V. Training project
(i) i2c colour maintenance skills hands-on training project
Identification of i2c colour television main meta devices and mastering of their functionality
Understand i2c colour television signal flow and master basic debugging methods
Understanding the work of electronics
I2c colour television microprocessor controls circuit testing and analysis
Infrared remote controls sent and received tests and analyses
Test and analysis of the keyboard control
I2c colour television remote into plant mode operation exercise
Analytic testing and analysis of i2c colour television images, waves, adjoining sound, circuits
Autosearch stations, physical training and analysis
Tv/av switches and analyses
I2c colour television background volume control test and analysis
I2c colour television colour decoding and image reuse circuit analysis
I2c colour television tri-color signal testing and analysis
Line, frame wave analysis and measurement
I2c colour television automatic brightness control test and analysis
Frame adjustment
Character positioning operation
Switch power circuit testing and analysis
Measurement of voltage power switches oscillating wave shape
Magnetic circuits
Analysis and maintenance of common malfunctions
(ii) toshiba superchip maintenance skills hands-on project
Identification of the main elements of the superchip colour television and mastering their functions
Understand the overall signal flow and master basic debugging methods of the superchip colour television
Understanding the work of electronics
Superchip microprocessor control circuit testing and analysis
Testing and analysis of the transmission and reception of infrared remote controls
Test and analysis of the keyboard control
Superchip tv remote into plant mode hands-on training
Superchip tv image analysis and testing, calibration, adjoining, on-frequency circuits
Autosearch stations, storage stations analysis and operation
Tv/av toggle analysis and operations
Superchip tv with volume control analysis and testing
Superchip television colour decoding and image reuse circuit analysis
Superchip tv 3-bed signal analysis and testing
Line, frame wave analysis and measurement
Superchip tv automatic brightness control analysis and testing
Frame adjustment
Switch power circuit testing and analysis
Measurement of voltage power switches oscillating wave shape
Magnetic circuits
Analysis and maintenance of common malfunctions
(iii) lcd maintenance skills practical training project
Understanding the basic structure and working principles of the main metaware in lcd tv
Understanding the composition of the main units of lcd television and its underlying working principles
Measurement and analysis of electro-modifiers
Remote control and keyboard control measurements and analysis
Video signal processing process measurement and analysis
Audio signal process measurement and analysis
Switch steady-pressure circuit measurement and analysis
The working principles and analysis of the lcd screen
Analysis and maintenance of common malfunctions
(iv) working principles and maintenance methods of dvd machines
Instrument configuration
User selection instrument: 20m/40m double tracer waver, digital universal table, general computer (teacher machine)
50/300 mhz scanner, general computer (student machine)
