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Overview of products
“dbtv-21 lcd maintenance practical examination equipment” is based on the technical instructions for physical training and identification equipment for vocational skills of “home electronics repairers” issued by the ministry of labour and social security of the people's republic of china. The products developed in accordance with the teaching and practical training requirements for vocational education are practical instruction in the principles and maintenance of television machines suitable for higher-level institutions, vocational schools, applications and maintenance of electronics and electronics, as well as in courses on the maintenance of domestic electronics。
The hands-on training devices for this lcd tv repair facility are also suitable for technical schools, vocational training schools, vocational centres, appraisal stations/centres specializing in electrical appliances, as well as for the maintenance of audio-visuals, as well as for the skills of middle- and advanced-level workers。
The hands-on stations include hands-on control screens (turning current power, colour signal generator, smart appraisal interface), lcd screens and hands-on components (lcd television module, smart reality check system). Lcd screen: 21 inches, contrast: 600:1, bright: 500 cd/m2, reaction time < 16 ms. The lcd modules include smart failure conversion interfaces, switch steady voltage circuits, reversers back-light drive circuits, remote and in-house keyboard control, video signal processing, audio output, ad module conversion, built-in failure setting systems, which can be installed by computers at random. The smart practical examination system is equipped with smart appraisal software and smart answering devices, which allow students to exchange data with their teachers ' computers and provide statistical analysis of their performance. (c) be equipped with hands-on guidance。
Dbtv-21 hands-on calibration devices (intelligence test, 21-inch liquid crystal) for household electron video maintenance techniques
Ii. Technical capacity
1. Input power: ac220v (1)(10%) single-phased ac220v 50hz
Working environment: temperature -10°c +40°c relative humidity <85% (25°c)
3. Whole capacity: <300va
4. Safety protection: action current 30 ma, action time 0. 1s
5. Body size: 170 cm x 93 cm x 135. 5 cm
6. Wireless smart appraisal system:
The smart appraisal system uses a new type of wireless network network, which is stable and easy to communicate without the need for switches, lines, etc. It consists mainly of teachers ' machines, smart hands-on boards (inline), smart hands-on systems software with smart answering machines. The answering machine consists of a 240 x 128-point blue-seated lcd touch screen, touch screen, microprocessor, memory, communication module. The system can perform malfunctions through keyboards or tutorials, students can perform fault detection on the physical training station's electrical circuits, and the appraisal system can perform functionality: it can achieve automatic monitoring and identification of the equipment, it can repeat the number of malfunctions performed on the actual training station, it can remove and count the number of fault points, it has a roll function, it has a submission function, it has a personal login password setting function, it has a print function, it has a number limit function。
Iii. System composition
1. This device consists of four components of a hands-on control screen, a hands-on desk, a liquid crystal display and a hands-on component
(i) practical training control screens (iron-bed sub-light-coated spray structures, aluminium plastic panels)
2. Communication power (all with overflow protection)
Output power: municipal electricity does not isolate output 220 v 50hz
Isolated transformer output 220v 50hz
14. 5v 50hz
3. Direct current power source: ±16v/+12v
4. Colour signal generator
(1) output frequency range: channel 12
(2) form of television signal: 16 forms, divided into circles, dots, grids, black and white, colour, single colour, etc., can be selected directly by key
(3) output signal: video, acoustic (medium frequency 6. 5m), radio frequency output interface)
(4) signal formula: pal-d/k
5. Intelligent examination interface modules: answering machine interface, pc serial interface, colour module interface
(ii) lcd monitor: 21 inch contrast: 600:1, bright: 500 cd/m2, reaction time: <16ms
(iii) practical training components
This device consists of a liquid crystal colour module, dvd viewer, and an intelligent hands-on appraisal system。
1. Training module on liquid crystal colours
Intelligent failure conversion interface units, switch-pressure circuit units, reversers backlight drive circuit units, remote and in-house keyboard control units, video signal processing units, audio output units, ad module conversion units, built-in excavator systems (can be computer random failure points)
2. Smart hands-on testing system
Computers monitor 1-126 performances in household appliances station
2. Ten failure points have been established。
3. Volume function
4. Volume functions
5. Zero-free single station and all experimental stations
6. On-line communications with automatic monitoring of the electronics examination stations
7. Generation of student personal report cards
Viii. Statistics and analysis of studies
9 has a password to access the system to change it
10. Printable
11 with limited number of answers
12. Student stations with smart answering machines, where students can exchange data with their masters
(iv) a hands-on desk. The overall structure is based on the aluminum alloy framework and has a four-million-way wheel and four fixed-regulating units that are mobile, fixed and supportive of the laboratory layout. Desktops are waterproof, fireproof, resistant to high-density plates, structurally robust and stylish. There are drawers and cabinet doors to place tools and materials, etc。
Iv. Pilot projects
1. Blackscreen failure analysis and failure demonstration experiments;
2. Acoustic, imageless failure analysis and demonstration experiments;
3. Key-controlled circuit failure analysis and demonstration experiments;
4. Fault analysis and demonstration experiments for remote reception circuits;
5. No raster, no sound malfunction analysis and demonstration experiments;
6. Experiments for analysis and demonstration of right-channel noise failure;
7. Experiment for analysis and demonstration of left-channel noise failure;
8. Fault analysis and demonstration experiments for power-discharge circuits;
Fault analysis and demonstration experiments on remotely launched circuits;
10. Fault analysis and demonstration experiments with rasters, no images and no acoustics;
11. The lcd port definition experiment;
A demonstration experiment on the adaptation of working voltage to lcd tv;
13. Lcd-tv integrated test experiment
