Summary of radio and television technology maintenance work

Since I joined the work in 1998, I have been working on radio and television technology maintenance in the city's radio and television stations. Through these years of serious work and study, we have established a life outlook and values ​​that serve the people wholeheartedly, with a high sense of professionalism and responsibility. In my work, I work hard, work hard, study hard, learn new technologies , new theories, and constantly improve my business standards and necessary skills. For ten years, I have been observing my job in obscurity and striving for excellence. The main work that has been done in recent years is summarized as follows:

First, daily work

As a technical engineer who maintains radio and television technology , in this position, he strictly demands himself, with a high degree of professionalism and responsibility, conscientiousness, conscientiousness, and meticulous work to do his job well; to accumulate experience and study hard. Business technology , familiar with equipment performance and compliance with various rules and regulations, law-abiding, united and coordinated, obeying distribution. Efforts are made to complete various tasks such as inspection and troubleshooting. Full participation in safeguarding the live report of the spirit report of the 17th National Congress of the Communist Party of China, the live broadcast of the national lunar exploration project, the 2010 Beijing Olympic Games, the 60th anniversary of the founding of the People's Republic of China, and overcoming difficulties in the live broadcast of various types of guarantees Actively participate in the advance maintenance of various types of equipment, exercise emergency handover; ensure the 12-word policy of “uninterrupted, high-quality, efficient, and safe” during the mission, and successfully complete the quality and smoothness of major TV programs. Broadcast safely.

Second, study professional theoretical knowledge

As a new century engineering and technical personnel, I often remind myself that starting from the basics and making progress, we can better adapt to the work, so we insist on refining the knowledge related to the business and strengthen the practical hands-on ability. However, the theory of light has a theory. Knowledge is not enough, practice is the first, practice is the foundation, and learning theory is also for better practice, so that we can combine theory with practice. To this end, I focused on the basics of digital TV principles, sdh cable transmission technology , digital cable transmission technology , transmitter working principle and maintenance and maintenance basics, computer basic knowledge and operating system capabilities.

With the advancement of the times, the update of technology , that is, the knowledge update is changing with each passing day. From the air to the ground, from analog to digital, the combination of computer and network technology to adapt to the rapid development of modern science and technology , I feel powerless and difficult to adapt. The old saying goes, "One inch of time is one inch of gold, and it is difficult to buy inch of inch!" I am determined to take a high sense of urgency, both old and new, not ashamed to ask, study hard, persist in learning, accumulate over time, and apply what I have learned. Apply what you have learned to work life.

Third, work experience and performance results

In this ten-year technical maintenance work, he independently faced various faults of four sets of TV transmitters and two sets of broadcast transmitters in the EMU, and solved some simple faults. The specific work of technical maintenance and repair in the past ten years is now expressed as follows:

From 1998 to 1999, I worked hard on the basics of electrical engineering and electrical appliances, and TV room maintenance projects. Also studied the maintenance and management of the province's microwave circuit technology . Improve the maintenance and repair skills of radio and television technology in an all-round way, and strive to improve business skills. At the same time, in 2000, we continued to learn new technologies and new knowledge, laying a solid foundation for future work. During this period, he participated in various technical maintenance support tasks and all kinds of equipment failure repairs.

During the January 2001 shift, the image signal of the TV transmitter of the Dingxi Integrated Channel was interrupted or the screen was abnormally disturbed. After the detection, the clamp amplification box was faulty. After the inspection, only the 100uf/25v capacitor was replaced. There are no obvious faults in other components. After the fault continues to appear, the modulation unit, the correction unit and the transmitting unit are checked by the electric demodulator. The fault reappears at 10 pm, and the time is good and bad, and the image is found to have severe ghosting. The clamp amplification capacitor is to be adjusted, and the other excitation cassette operation curves are to be adjusted. The “clamp” and “adjust” switches in the clamp amplifier circuit should be placed in the “clamp” position during normal operation. During the inspection, it is found that the clamp is placed in the “adjustment” position for a long time. When the “clamp” switch is placed in the “clamp” state, the image interruption phenomenon disappears, but the black channel interference fringes appear on the screen, which is adjusted by the clamp amplifying circuit. The test machine works normally and the fault is eliminated.

During the shift in June 2002, the Gansu Cultural Channel sap flow meter indicated abnormality, the power output was zero, and the IF processor output indicator was off. Turn on the IF processor and check the three IF images of x1, x2 and x3 step by step. Continue to check that the two circuits of v22 and v23 are not working, and the signal is interrupted. After testing, the performance of the two tubes of 3dg91b changes, c43, The capacity of c45 and c46 changes, and the c42 capacitor needs to be replaced. After the test machine works normally and the fault is eliminated.

In June 2004, the tf-4 type 50 watt FM transmitter modulator lost lock alarm. According to the cause of the fault analysis, the relevant parameters were re-adjusted and the equipment returned to normal.

In February 2005, he participated in the digital transformation of microwave equipment room equipment in this department.

In June 2005, he participated in the signal reception and debugging work of the Asian No. 2 satellite, and increased the content of the TV program by adjusting the satellite parameters.

In September 2006, the tf-4 type 50 watt FM transmitter voltage alarm, no output power and odor, after checking, found that the power box xlb2 plug-in is faulty, temporarily replaced with a good plug-in, and then check even The wire is found to have an open lead. After reconnecting and checking other components, the test machine is turned on and back to normal.

In November 2006, the tf-4 type 50 watt FM transmitter amplifier power input was found to be zero. After checking the final stage power amplifier circuit, the amplification tube bg1 was normal, and the bg2 amplification tube blt94 was open, using the same model new tube. Replace, test machine output power returns to normal, troubleshooting.

In November 2007, our department relocated the machine room to install new equipment. During this period, he participated in the reinstallation of the equipment room, the commissioning of the antenna feeder, the installation and commissioning of new equipment, and the welding of various types of lines, and successfully completed the task.

In January 2008, he participated in the installation and commissioning of the transmitter TV monitoring system. From system installation, line layout, communication port connection to various problems in operation, the final debugging operation was successful, which greatly improved the launch of the station. Machine equipment operating capability.

In June 2008, a central transmitter was suddenly unable to output power. After detecting the exciter, there is no output power. Check the actuator panel indication. The amplifier temperature is between 48 °c and 51 °c. The amplifier current and voltage are not. Indication, the output power alarm value is displayed as 7w, and other indications are normal. It is preliminarily determined that the temperature is too high, causing damage to the device inside the actuator. Check and carefully repair, the fault is eliminated. In July of the same year, the power of the central seven transmitters dropped to 2.4kw monitoring system alarm, and the monitoring system was turned on. It was found that the output power indication of the second power amplifier was 0.2kw, and the current a8 was 0a. The overall power drop is definitely related to the power amplifier. After careful cooperation with colleagues, the test machine works normally and the fault is eliminated. Software development department work summary technical management work summary '> engineering technology management work summary technical summary'> wheat production technology summary technical staff work summary '> oilfield drilling construction technicians work summary technical work summary '> year-end technical work summary technical work summary' >Power supply limited liability company technical work summary technical work summary '> business technology work summary technical work summary'> my professional technical work summary [return technical work summary column list]

In November 2008, he participated in the training of new equipment organized by the department, learned the working performance of kfd-ш-833 uhf 3kw all-solid-state TV transmitter, and mastered the kfd-ш-833 uhf 3kw all-solid-state TV transmitter screen. The method of troubleshooting is familiar with the important parts of the daily operation and maintenance of the kfd-ш-833 uhf 3kw all-solid-state TV transmitter.

In April 2008, he published an article on radio and television maintenance in the provincial and ministerial publication "Modern TV Technology ".

In April 2010, a special article on radio and television maintenance was published in the national publication "Automated Instrumentation".

4. Insufficient shortcomings and future work

"no one is perfect". Everyone has their own shortcomings. For me, the biggest shortcoming is that things can't be "lasting and persevering". It's because of their "heartlessness" that they don't have enough strength. For years, they always think that they are defective. Compared with other people, even the pessimism of serious "responsibility", and later thought of "the body is not disabled" and the struggles of disabled people such as celebrities, it is a sudden realization, so that I gradually have confidence, let me recognize the innate defects and Not terrible, and the defects of the day after tomorrow will make you a disgusting person. However, I am determined to have the confidence to overcome these shortcomings.

Therefore, in the future work and study, I will continue to improve the political thinking and business skills, strive for progress, learn from each other's strengths, and full of work enthusiasm and life's fighting spirit to participate in radio and television broadcast work, to become a Qualified and excellent engineering and technical personnel.

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