Reporting person for the old television maintenance training course: xx catalogue 01 maintenance basic knowledge 02 maintenance process and skill 03 circuit board maintenance 04 maintenance case analysis of maintenance maintenance case 05 maintenance maintenance of lcd television 05 maintenance basic knowledge parrt01 maintenance art01 based on electronic beams launched through electronic guns, impact fluorescent screen generation of images is the core technology for early television. Video tube technology digital televisions transform the digital signals received into images and sound signals by decoding them, improving the paint and sound quality. Digital signal processing lcd television uses lcd molecule sequencing changes to control the passage of light and to create images, which are the dominant technology of modern television. The failure of the lcd-based television type 010203 to turn on or the failure of the power signal may be a failure of the power plate or poor access to the power line. Power problems could not normally switch to or receive specific channels, possibly high-frequency head or signal-processing circuit failure. The remote control was not able to control the television, possibly because the remote control battery was depleted or the infrared launcher was damaged. Televisions without sound or sound abnormalities may be a problem with audio output circuits or loudspeakers themselves. The screen displays a line, vertical line or colour distortion, usually associated with damage to the cathode or liquid crystal screen. Acoustic failure images show that the maintenance tool for the reception of an abnormal remote-controlled failure channel is a screwdriver that is a mandatory tool for disassembling and installing screws. The millimeter oscillators are capable of displaying telecommunications wave shapes and helping maintainers to analyse and diagnose signal problems on television. Massive meters for measuring voltage, currents and resistance are important tools for detecting circuit failure. Welding tools include welders and welders for welding and repair of circuit boards within the television. The maintenance process and technique part02 fail-diagnosis process begins with a visual examination to find visible damaged or loose components, such as plugs, connections and casings. Visually, televisions are subjected to electrical tests to see if there are power lights on or on screen anomalies, while ensuring safety. Electric tests check whether the signal source input of the television is normal, including the correctness of the antenna, cable, hdmi, etc. Signal source detection tests each of the functions of the television set, such as volume regulation, channel switching, painting setting, etc., to determine the failure range. The functional test uses specialized diagnostic tools or software, such as universal meters, oscillators, etc., for detailed screening of internal circuits on television. The use of rapid dismantling techniques using diagnostic tools, such as static screwdrivers and unplugging clamps, can improve the efficiency and safety of parts of the decommissioning of televisions. The use of the right tools to mark screws and parts during the dismantling process and to record their location and sequence will facilitate rapid and accurate reassembly. The marking sequence is to ensure hand-to-hand and use static wristbands to prevent electrostatic damage to sensitive electronic components within the television. Sos01 to avoid electrostatic damage must ensure that the power supply is completely cut to avoid the risk of electrocution before maintaining old televisions. Insulation tools, such as insulation screwdrivers, should be used to prevent short circuits or electroshocks during power outages. Insulation 03 is used to wear electrostatic bracelets or to use electrostatic pads to prevent damage to internal sensitive elements of electrostatic television. In dealing with high pressure components such as cathode tubes, special care should be taken to avoid the risk of high voltage shock or explosion. The correct handling of circuit boards for high-voltage components, the repair of the part03 circuit board structure, the decomposition panel consists of conductive circuits, insulation panels, electronic components, etc., and is the core component of the television. The components of circuit boards, such as electrical resistance, capacitation, transistor, etc., are assigned to the circuit boards and jointly complete the processing and transmission of signals. The functional circuit boards of electronic components connect electronic elements by welding, plugging, etc., to form a complete network of circuits. The electrical circuit board connective component detection and replacement determines whether or not it works by measuring the voltage and currents of elements such as resistance, capacitation, etc., on a universal scale. (c) the use of a universal meter to identify damaged electrical resistance, capacitors, etc. On circuit boards, and to replace them with new elements of the same specification. Identification and replacement of damage elements with the correct welding techniques to ensure that welding points are strong, short-circuited or welded when replacement elements are replaced. Welding technology points circuit board failure precludes clicking on the addition of text to state your views succinctly. Depending on the need, text may be added or subtracted to allow viewers to understand the ideas you convey. Click to add text details, which will make your point succinctly. Depending on the need, text may be added or subtracted to allow viewers to understand the ideas you convey. Click to add text details, which will make your point succinctly. Depending on the need, text may be added or subtracted to allow viewers to understand the ideas you convey. Click to add text details, which will make your point succinctly. Click to add text details, which will make your point succinctly. Depending on the need, text may be added or subtracted to allow viewers to understand the ideas you convey. The vic tvs maintain the part04 cvc operation tube via cathode-launching electrons, and form high-speed electronic beams by accelerator and focus poles, aiming towards fluorescent screens. The generation of electronic beams and the acceleration of the 01-turning coil generate magnetic fields, control the precise position of the beams on the fluorescent screen and form images. The function of the deflection system is 02 high-speed electronic beams that impact phosphorous powder on the fluorescent screen so that it glows and produces visible parts of the image. The fluorescent fluorescent pv03 cavity diagnosis of high pressure package failure results in the image being blurred or not shown, and the normality of the high pressure package output voltage is checked. The detection of the high-pressure package brightness anomaly may be caused by the loss of the bright spot or the failure of the bright control circuit, which requires detection and repair. Anomalous focus of the cavity tube can blur the edge of the image, and it should be checked whether the focus level is properly adjusted. The crt replacement process first ensures that the tv power is disconnected and removes all cables and components connected to the crt. Disconnection of power sources and connections reconnect all cables and components in the opposite order of original dismantling to ensure that the connection is solid and reliable. The connectable cables and components place the new catheter in the right place, ensure that it interfaces correctly with the television and then fixes the catheter. The installation of the new cathode will use specialized tools to carefully remove the cathode and to protect the neck and glass parts of the cathode from damage. After replacing the cathode, reconnecting the power supply, conducting start-up tests and adjusting the television set-up to ensure normal working. The lcd tvs were tested and adjusted to maintain the structure and principles of the art05 lcd screen, which consisted of a back layer, a liquid crystal layer, colour filters and migraines, among others, to achieve the image display. The lcd molecule changes the direction in the electric field and displays different colours by controlling the passing rate of light. The 02 backlight module provides a flat light source and is the basis for the lcd screen display of images with a direct impact on the paint quality. The 03-drive ic is responsible for the conversion of the image signal to the control signal of the lcd molecule and is the core component of the normal operation of the lcd screen. When displaying anomalies such as stripes, colour blocks or scintillation of ic and signal processing lcd failure, the alignment of data lines and screen drives are checked for the actions of the 04 lcd base structure molecule and control backlight module. The liquid crystal screen displays an abnormal touch screen reaction that may be caused by screen calibration problems or failure of the touch screen controller. The slow backlight component of the touch screen reaction is damaged or the connection line is loosed, resulting in light on the back or uneven brightness of the screen and requires inspection and replacement. When the back light is not bright or the brightness is uneven, the entire screen component needs to be replaced to prevent further damage to other components. The replacement of damaged lcd screens is a common task during the maintenance process and requires precision to avoid further damage. The failure to replace the backlight system of the lcd screen results in uneven or completely non-lighted screen displays, and backlights or led lamps are checked for maintenance. The image blurring of the backlight system may be due to problems with the focus circuit or the liquid crystal panels themselves, which need to be searched and repaired on a case-by-case basis. The failure of the remote control to address image blurry may be caused by poor battery exposure or failure of internal circuits, which are maintained by checking battery warehouses and circuit boards. The management of the remote control failure maintenance case analysed the classic parrt06 failure case of a cathode television that suddenly failed to show. The inspection found that the pressure pack failed and the television was back to normal after replacement. The cathode television did not show a plasma television colour distortion, which was diagnosed as being due to damage to the screen-driven ic and the change colours returned to normal. The problem was resolved by replacing the backlight drive, as a result of damage to the backlight of the plasma television colour abnormal lcd television. The lcd backlighted digital television signal reception was unstable and was checked for high-frequency head failure and the post-high-frequency signal replacement was normal. The idea and method of repair of poor digital television signal reception 01003004 is based on user feedback, gradually checking key components such as power supply, signal input, cathode, and locating failure points. The malfunction diagnostic process replaces suspected malfunctioning components with those known to work normally to see if the problem can be solved and the failure range rapidly reduced. The replacement test will test the circuit map, analyse the signal flow and circuit working principles and identify possible fault lines. The circuit map analysis uses specialized software tools for internal software diagnostics of televisions to detect software failures or configuration errors。the preventive maintenance of the software diagnostic tool recommends regular use of compressed air and soft brush to clean the inside of television to prevent dust accumulation leading to overheating or short circuits. Regular cleaning of television
