Type-C interface display solution

It's already 2021, don't everyone still know about type-c interface desktop monitors? Then let me popularize the history of monitors. Shenzhen Hechuanxing Technology Co., Ltd. first used CRT monitors, which used green display and single-display picture tubes, which were not only large and bulky, but also displayed
2021-12-04 14:22:24745

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Description of black and white picture tubes and display tubes

Description of black and white picture tubes and display tubes.
2021-03-19 16:06:230

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Application circuit design based on TDA6103Q and color picture tube

The cathode and grid of the color picture tube are protected by gap discharge to protect the internal output amplifier of the TDA6103Q from being broken down by the high voltage generated by the discharge between the electrodes.
2019-07-30 00:55:02530

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What is the difference between flat screen TV and LCD TV

Flat-panel TV is a TV with a flat screen. It is a type of TV compared with the huge body of traditional picture tube TVs. It mainly includes liquid crystal display LCD, plasma display PDP, organic electroluminescence display OLED, surface conduction electron Launch TV products that display several major technology types such as SED.
2020-09-23 17:38:042786

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Free download of common electronic tube pin wiring diagrams

The main content of this document is the free download of commonly used electronic pin wiring diagrams.
2019-12-23 16:29:1281

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What are the common displays in life

Now the CRT display is divided into two kinds: spherical picture tube and flat picture tube. The so-called spherical surface means that the section of the picture tube is a spherical surface, and the picture tube is curved in both the horizontal and vertical directions.
2019-10-25 08:43:532343

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What are the types and differences of computer monitor interfaces

As one of the important hardware of the computer, the main function of the computer monitor is to output the image and display the text. From the light-emitting principle, the monitor can be divided into the CRT of the picture tube and the LCD of the liquid crystal.
2019-08-23 16:55:518564

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The principle of TV imaging _ the division of TV types

This article first divides the types of TV sets and gives a rough introduction respectively, and then explains the imaging principles of LCD TVs and traditional CRT TVs.
2019-07-31 15:44:213490

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What is the secret to the success of Japanese manufacturing beyond the United States?

Trinitron picture tube. You know, as the highest award in the American TV industry, the Emmys were previously only given to people in the TV industry, and electronic products became the winners, and Sony was the first.
2019-06-04 15:58:02694

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7/9/11 pin picture tube socket function, picture tube socket pin

7/9/11 pin picture tube socket function, picture tube socket pin keyword: picture tube socket pin function 7/9/11 pin picture tube socket function The pin function is as follows: 7 pin: 1 pin
2020-10-01 06:21:011446

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Application case of color TV modification board–tube holder,Tube holder

Models, specifications, pin names, and order of arrangement are different, and the cables on the kinescope socket pins must be adjusted before use; The overall structure and insulation performance of the board are not advisable. The method is: add a socket
2020-10-01 06:11:01255

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The power supply method adopted after the cathode of the picture tube and the filament are short-circuited, the repair of the short-circuit of the filament

After working for a period of time, touch the current limiting resistor of the filament of the kinescope by hand (pay attention to safety, you can turn off the TV or move the current limiting resistor outside in advance) to see if its temperature rise is normal. If the humidity is obviously high, you can increase the number of turns of the transformer A few turns. If you feel that the start-up time of the picture tube is significantly slower than before, you can appropriately reduce the filament
2020-10-01 05:21:01442

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Picture tube activation new method, activate CRT

The new method of activating the picture tube, activate CRT keyword: the new method of activating the picture tube.
2020-10-01 05:06:01526

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Laser TV is not as good as some companies advertise

Around 2000, CRT picture tube TV has developed to a very mature stage, and there is not much room for further breakthroughs; on the contrary, product limitations are becoming more and more apparent. For example, it is very difficult and expensive for CRT TVs to be larger than 30 inches. At that time, LCD TVs were just beginning to emerge, and the maximum size was 32 inches.
2018-06-21 18:15:274621

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Line output transformer model description_Line output transformer pin function description

The various voltages required by the picture tube, and some also provide the pulse signals required by other circuits. The line frequency current is boosted, and then doubled and rectified into a high-voltage direct current of about 20000V through multiple diodes and capacitors. The structure diagram is used to attract the electron beam emitted by the electron gun of the kinescope to ensure that the electron beam can effectively hit
2018-03-12 10:43:3321538

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Using a multimeter skillfully to judge whether the color picture tube of the oscilloscope is aging or not

Use a multimeter skillfully to judge whether the oscilloscope color picture tube is aging or not.
2016-04-14 22:33:0613

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Principle of Laser TV

Laser TV is a TV that replaces the color picture tube with a color laser display system. It uses red, green and blue lasers as the light source of the color laser TV, which is processed correspondingly by the display system, so that the image is finally displayed on the screen, and then the TV receiver is composed of the accompanying sound.
2015-02-03 11:19:383318

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Picture tube protection circuit diagram and design principle

A picture tube is an electron (cathode) ray tube, and it is the key component of the picture tube section for the reproduction of the image in the monitor of the television receiver. Its main function is to capture and convert the electrical signal (image signal) of the camera at the sending end (TV station) at the receiving end with brightness
2012-11-15 09:17:3211695

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Comparison of advantages and disadvantages of four new high-definition display technologies

Emerging display technologies represented by LCD, PDP, DLP, and LCoS represent the development direction of TV technology in the digital TV era, and are destined to become the terminator of picture tube TVs. Digital TV, especially high-definition TV, is also destined to become the development of world TV.
2012-07-09 10:58:371393

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2012 China Smart Cloud TV Industry Development Summit April Shenzhen decryption

Since the birth of the first black-and-white set in 1929, there have been only two substantial technological revolutions in the development history of the global TV industry so far: "black-and-white TV to color TV" and "CRT (color picture tube) TV to flat-panel TV".
2012-04-12 17:37:20524

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Limiting Voltage of Picture Tube Electrodes and Its Influence

The electrodes of kinescopes have their own limit voltages, and different kinescopes have different limit voltages of electrodes. Take a 35cm (14in) black and white picture tube as an example, the limit voltage of the tube is shown in the table.
2012-03-27 16:12:362525

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Causes and preventive methods of overheating damage to picture tubes

The reason why the picture tube is damaged by heat is caused by overheating. Therefore, for the ignition failure, it should be repaired as soon as possible. For maintenance personnel, it should start from circuit protection.
2012-03-27 16:02:032299

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08 Picture tube circuit

2012-03-01 14:03:586

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Comparative analysis of advantages and disadvantages of new high-definition display technology

Emerging display technologies represented by LCD, PDP, DLP, and LCoS represent the development direction of TV technology in the digital TV era, and are destined to become the terminator of picture tube TVs. Digital TV, especially high-definition TV, is also destined to become the development of world TV.
2012-02-16 11:42:202505

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Troubleshooting of the Potentiometer of the Accelerator of the Color TV Line

Recently repaired a Sony KV-SF21T80 color TV, the brightness is unstable, bright and dim. The measurement found that the accelerating electrode voltage of the picture tube changed with the change of brightness, when the accelerating electrode voltage decreased.
2011-11-28 14:30:119073

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Replacing the computer monitor socket

There is a color display tube holder (early 14-inch, 15-inch color doll) and a color TV tube holder. On the glass shell of the electron gun of the picture tube, when disassembling, it is necessary to remove the
2011-04-19 17:18:05162

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Amplifier circuit troubleshooting courseware

1. Troubleshooting skills for voltage amplifier circuit 2. Troubleshooting skills for power amplifier circuit 3. Troubleshooting skills for picture tube base plate
2010-11-24 17:14:5968

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Inductive high voltage alarm circuit diagram

The inductive high voltage alarm can detect whether the line has high voltage without contact. It can detect the AC mains (220V or 380V), the high voltage of the picture tube
2010-11-19 16:31:562185

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Network video technology training materials

Training purpose: To improve the maintenance skills of CRT TVs for service network maintenance personnel
2010-11-12 23:12:0659

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Judgment method of picture tube aging

When the TV has been used for several years, the picture tube will gradually age. The most intuitive manifestation is that after the TV is turned on, the time to generate the grating is longer than before, and the brightness becomes darker than before, and the contrast ratio also becomes smaller. For color picture tubes,
2010-10-14 12:01:3912548

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Black and white picture tube and black and white TV

2.1 Black and white picture tube 2.2 The principle block diagram of black and white TV 2.3 The transformation of signal waveform and spectrum 2.4 Influence of channel frequency characteristics on image quality 2.5 Main technical requirements of black and white TV 2.1.1 Imaging
2010-10-01 17:05:59119

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Picture tube and its auxiliary circuit

10.1 Classification and characteristics of color picture tubes 10.2 Structure and working principle of self-converging color picture tubes 10.3 Auxiliary circuit of color picture tubes Figure 10-1 is a schematic diagram of the shadow mask tube. The shadow mask tube has three separate electron guns around the central axis of the picture tube
2010-10-01 10:51:5338

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Black and white TV assembly, commissioning and repair

2.1 Assembly and debugging of power supply 2.2 Assembly and debugging of line scanning circuit 2.3 Assembly and debugging of field scanning circuit 2.4 Assembly and debugging of auxiliary circuit of video amplifier and picture tube 2.5 High frequency tuning
2010-09-24 15:48:18164

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Inverter composition electronic high voltage tester circuit diagram

This electronic high-voltage measuring device can be used for high-voltage transmission lines, municipal AC 220V or 380V, and the high-voltage tube of the picture tube is not contacted for inspection. It has small size and low power consumption.
2010-09-19 02:51:40608

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A method for increasing the filament voltage of a picture tube

The 9-inch and 12-inch picture tube filaments are generally powered by a 12V regulated power supply. When the picture tube ages, it is often necessary to increase the filament voltage to increase the brightness of the picture tube. However, there is a limit to the increase in the voltage of the regulated power supply.
2010-07-28 17:10:084500

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A Simple Way to Revive Color Picture Tubes

The color picture tube will age after a long time. You can use a multimeter for simple measurement. As shown in the figure below, connect the filament of the picture tube to the rated working voltage, turn the multimeter to the electric block, and connect the positive meter to the cathode of the picture tube, and the negative test lead.
2010-07-28 17:02:541677

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Operational amplifier FC52 connected to TV high voltage delay circuit diagram

In transistor TVs, due to the use of high-voltage silicon stacks, a voltage of 9000~14000V is applied to the third anode of the picture tube when the TV is turned on. At this time, the filament of the picture tube has not been heated through, which will invisibly shorten
2010-07-28 15:52:172358

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Overvoltage protection circuit of picture tube filament

When installing, as long as the filament wiring of the picture tube is welded, the output of the protection circuit is directly welded and fixed on the tube base, and the original filament wiring is welded to the input end of the circuit board according to the positive and negative. After adding the protection circuit, due to the current limiting effect of BG1, the filament will not be burned to incandescent when it is turned on, but will be dark red, which has no effect on the start of the picture tube.
2010-07-28 15:28:462362

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Picture tube filament protection circuit diagram

The resistance of the TV picture tube filament in the cold state is much smaller than that in the hot state, so when it is just turned on, the instantaneous inrush current of the filament is very large, and the filament will
2010-07-28 15:13:084361

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TV radiation problems

TV Radiation Issues The following are TV radiation test statistics Conventional picture tube TV CRTs were the first to be tested. We first take a close look at it
2010-05-18 01:50:224741

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The principle and characteristics of laser TV

Features and principles of laser TV Laser TV: replace the color picture tube with a color laser TV display
2010-05-05 10:01:402216

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Color picture tube base size GB 11490-1989

Color picture tube base size GB 11490-1989 This standard specifies the main dimensions of the color picture tube base. Suitable for color picture tubes plugged into sockets.
2010-04-29 16:37:109

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How to Extend the Life of Your TV

How to prolong the life of the TV 1. The life of the TV is most closely related to the picture tube. The picture tube is complicated in structure and expensive, so it is the primary protection object.
2010-02-22 09:38:36881

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Don't turn on the TV too brightly

Do not turn on the color TV too brightly. Usually, the brightness switch of the TV should be in the small position, and the image should be kept in a moderate light. If it is too bright, it will cause the following disadvantages: Shorten the life of the picture tube
2010-02-22 09:23:49529

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LCD / Plasma / Rear Projection TV Competition

LCD / Plasma / Rear Projection TV Competition Preface: The traditional picture tube TV is on the verge of obsolete, and the next generation of TV has emerged, including LCD LCD TV, PDP plasma TV and LCOS rear projection
2010-02-11 14:33:36604

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Laptops are best not to use screensavers

It is best not to use the screen saver CRT (cathode ray picture tube) for the notebook. The display principle of the display is mainly to heat the cathode by the filament, the cathode emits electrons, and then accelerates the action of the polar electric field.
2010-01-18 09:51:40423

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How to Identify the TV Model Code

How to identify the TV model code Usually, the first two digits of the TV model represent the size of the picture tube. Most domestic TVs are expressed in centimeters, and imported TVs are marked with inches. like
2010-01-13 10:33:3610320

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How DLP (Digital Optical Processing) TVs work

How DLP (Digital Optical Processing) TV Works Not long ago, "big screen TV" meant almost just one thing: conventional picture tube television (CRT). But if you go now
2010-01-12 10:45:501491

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How TVs work

How TVs Work There is no doubt that TVs are the most time-killing device. Through television, we receive news, sports, entertainment, information and advertisements. Americans stick to 'picture tubes' for an average of two to three times a day
2010-01-12 10:33:3438476

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Diversified development of TV industry: 3D display, LED backlight are hot spots

Diversified development of the TV industry: 3D displays and LED backlights are hot spots DisplaySearch pointed out that the average selling price of TVs this year has declined for the first time since the transition from flat-panel TVs to traditional picture tube TVs. Therefore, TV manufacturers actively
2010-01-12 09:00:37419

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CRT discharge protection-varistor and its application

Picture tube discharge protection – varistor and its application circuit of the device is shown in Figure 4. Due to the small distance between the poles in the picture tube and some reasons in the manufacturing process, in the display tube
2009-12-29 16:44:22859

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How CRTs Work

The working principle of CRT The core component of a CRT (cathode ray tube) display is the CRT picture tube. Its working principle is basically the same as that of the picture tube of the TV in our home. We can regard it as a TV with a finer image. classic
2009-12-28 10:39:012852

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What are the picture tube brands of CRT monitors?

What are the picture tube brands of CRT monitors? Now the mainstream flat-screen CRT monitors on the market use picture tubes including LG "Future Window", Samsung "Dana Tube", Sony "Trinitron", three
2009-12-28 10:20:441567

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CRT technology

A surprising piece of news came out of CRT technology in March this year. Sony announced that the production and sales of Trinitron picture tubes will be completely discontinued, and this epoch-making product will eventually be withdrawn.
2009-12-28 10:18:563921

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CRT monitor picture tube type/display size and area

CRT monitor picture tube type/display size and area Picture tube type
2009-12-28 10:16:071445

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HTV180 HD digital TV chip

HTV180 is a high-integration video processing single chip mainly aimed at the high-definition digital picture tube TV market by Huaya Microelectronics. In terms of integration, HTV180 is currently the video processing chip with the highest integration and technical content among local integrated circuit manufacturers.
2009-12-14 10:35:3280

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Transmission and reception of black and white TV signals

Transmission and reception of black and white TV signals: 1.1 Sending process and receiving process 1.2 The principle of picture tube and electronic scanning 1.3 Black and white full TV signal
2009-09-22 08:00:0657

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TV Principles (Classic eBook Tutorial)

Principles of TV sets (classic e-book tutorial): basic knowledge of TV (principles of TV), electronic scanning, the concept of pixels, mathematical expressions of pixels, picture tubes and electro-optical conversion.
2009-09-21 17:12:58343

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The Electric Shock Repair Method for the Cathode of Color Picture Tube Grid

The Electric Shock Repair Method for the Cathode of Color Picture Tube Grid
2009-09-03 17:30:541980

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Repairing Broken Wire Picture Tubes with TV's High Voltage

Repairing Broken Wire Picture Tubes with TV's High Voltage
2009-09-03 16:42:38776

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Repair broken wire picture tube with electronic ballast

Use electronic ballast to repair broken wire picture tube electronic ballast (here refers to the kind of electronic ballast that adopts voltage doubler rectifier circuit) directly connected to both ends of fluorescent tube, and its output electricity
2009-09-03 16:39:55471

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Repair broken wire picture tube with tube radio

Repair broken wire picture tube with tube radio Prepare one tube radio, two crocodile clips, 450V
2009-09-03 16:28:431402

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How to improve the brightness of the picture tube

How to improve the brightness of the picture tube
2009-09-03 16:09:381108

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Ingenious method of color picture tube aging and rejuvenation

Ingenious method of color picture tube aging and rejuvenation
2009-09-03 16:08:20810

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Repair of the graphite layer of the picture tube

Repair of the graphite layer of the picture tube
2009-09-03 16:06:371076

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Television Principles and Modern Television Systems-South China Normal University

TV principle and modern TV system: grasp the concept of pixel, grasp the principle of camera tube and photoelectric conversion, grasp the principle of picture tube and electro-optical conversion, grasp scan by scan, interlace scan.
2009-08-22 18:02:2462

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A clever modification of the power supply circuit of the filament of the kinescope

A clever modification of the power supply circuit of the filament of the kinescope
2009-08-17 17:36:091007

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Use a multimeter to measure the picture tube skillfully

Use a multimeter to measure the picture tube skillfully
2009-08-12 12:10:05654

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How to judge the aging of black and white picture tubes with a multimeter

How to use a multimeter to judge the aging of the black and white picture tube? Add the rated working voltage (generally 12V) to the filament of the black and white picture tube (referred to as the picture tube), and leave the other pins empty without adding voltage. Turn the multimeter to the R×1k block, the red meter
2009-08-07 17:39:31444

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How to judge the aging of color picture tube with multimeter

How to use a multimeter to judge the aging of the color picture tube? Add 6.3V AC voltage to the filament of the color picture tube, and leave the other pins empty. Take the selector switch to R×100Ω, connect the black and white meter to the modulation grid (generally grounded),
2009-08-07 17:29:001137

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How to judge TV high voltage ignition

How to judge the high-voltage ignition of a TV set when the second anode voltage of the picture tube of a TV or color TV is 10~20kV and then a high-voltage fire occurs. High-voltage fire is one of the most common failures of TV sets. If it is not ruled out in time, light
2009-08-07 17:17:151764

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The principle of color picture tube reproduction of color images

The principle of color picture tube reproducing color image The principle of color picture tube reproducing color image 1: The three electron guns arranged in characters are stimulated by the three primary color signals of red, green and blue, respectively, and emit
2009-07-31 22:45:201318

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Color picture tube structure diagram

Color picture tube structure diagram
2009-07-31 22:43:382084

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Video tutorial on the analysis of the structure of the picture tube and its auxiliary circuit

Video tutorial on the analysis of the structure of the picture tube and its auxiliary circuit
2009-07-28 11:32:5778

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Picture tube brightness automatic control circuit diagram

Picture tube brightness automatic control circuit diagram
2009-06-06 09:58:51322

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Varistor picture tube protection circuit diagram

Varistor picture tube protection circuit diagram
2009-05-06 14:19:35240

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Repair of high pressure nozzle ignition of color TV

The distance between the high-pressure nozzle of the color TV and the grounding graphite layer of the picture tube shell is close, and there is a high voltage of more than 20,000 volts. color tv use
2009-05-04 20:48:132463

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Picture tube resurrection device circuit diagram

Picture tube resurrection device circuit diagram
2009-04-11 12:31:181127

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MOS tube structure diagram

MOS tube structure diagram
2009-04-06 23:25:583734

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What is LCM and the expertise of LCM

What is a liquid crystal module A liquid crystal module is simply a screen + backlight assembly. The display component of the LCD TV is the liquid crystal module, and its low temperature is equivalent to the picture tube in the CRT. Other parts include the power circuit
2008-09-08 19:49:324928

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Multimeter test components Daquan download

Measurement and repair of resistors Measurement and repair of capacitors Measurement and repair of inductance coils Measurement and application of oscilloscopes
2008-06-18 12:29:517660

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The function and voltage of each pin of TDA8359J

Overview: TDA8359J is a power circuit for 90° and 110° color deflection systems corresponding to 25 to 200Hz field frequency, and can also be used for 4:3 and 16:9 picture tubes. This IC has a field deflection output circuit, which can be used as a high-efficiency G-class system
2008-03-27 00:15:0028188

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TDA6111Q pin function and voltage

Overview: TDA6111Q video output amplifier, its operating bandwidth is 16MHz. The IC is packaged in the form of a single row of 9-pin medium power (DBS9MPF), and adopts high-voltage DMOS technology to drive the cathode of the color picture tube. It has high bandwidth,
2008-03-27 00:03:5118657

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Circuit diagram of automatic degaussing of color TV

Color TV automatic degaussing circuit diagram Many iron parts inside and outside the color picture tube
2008-03-11 23:33:115778

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Display shutdown highlight elimination circuit diagram

When the TV is turned off, the line and field scanning circuits stop working immediately, but the cathode temperature of the kinescope cannot drop sharply, and thermionic electrons are still emitted, while the inside and outside of the kinescope cone
2008-03-11 23:28:474752

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Haiyan CS37-2 picture tube feeding circuit diagram

Figure 10-20 is the picture tube feeding circuit diagram of Haiyan CS37-2 color TV. The filament voltage is supplied by the windings of the line flyback transformers ④ and ⑤ through the current limiting resistor R523. The acceleration pole voltage is adjusted by D502 to the reverse-travel anti-peak pulse.
2008-03-11 23:22:441687

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Structure and working principle of self-converging color picture tube

Structure and working principle of self-convergence color picture tube Self-convergence technology Black and white picture tube has only one electron gun, forming an electron beam, and there is no problem of convergence. There are three electron beams working at the same time in the color picture tube.
2008-03-11 23:19:2617

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Color TV picture tube structure principle

The shadow mask tube has three independent electron guns arranged in a "pin" shape around the central axis of the picture tube, 120° apart from each other and slightly inclined to the tube axis. Each of the three electron guns emits an independent electron beam controlled by the primary color signal, and the three electron beams use the same row and field
2008-03-11 23:16:37139

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Auxiliary circuit diagram of color picture tube

Auxiliary circuit diagram of color picture tube 10.1 Classification and characteristics of color picture tube 10.2 Structure and working principle of self-converging color picture tube
2008-03-11 23:01:4864

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Picture tube pinout diagram

Picture tube pinout diagram
2008-01-23 10:31:49447

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The composition of the display circuit

The composition of the display circuit The main content of this chapter is to introduce the structure of the picture tube. Mastering this part will help us understand the display.
2006-04-17 22:50:361222

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[Photos] Principle of new degaussing circuit for large-screen color TV

Parts such as grids and shadow masks in color TV picture tubes are made of metal materials. Earth's magnetic field, surrounding stray magnetism
2006-04-17 22:42:482200

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Repair of Aging of Black and White Picture Tubes

Although color TVs have become more popular in my country, some families in cities and many families in rural areas still use black and white TVs.
2006-04-17 22:42:122804

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Maintenance of high pressure nozzle ignition of color TV

The distance between the high-voltage nozzle of the color TV and the grounding graphite layer of the picture tube shell is close, and there is a high voltage of more than 20,000 volts. After using the color TV for a period of time
2006-04-17 22:42:10366

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TC-3418 color TV a bright band line

Analysis and maintenance: At that time, it was thought to be virtual welding. When the machine was opened, no virtual welding points were found. The light on the picture tube indicates that the high-voltage part of the line is normal.
2006-04-17 22:32:14611

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Sony KV-L34MFl type no grating picture tube filament bright

There is no grating after power on, and the filament of the picture tube is on. According to the analysis of the phenomenon, the fault generally occurs in the power supply circuit of the picture tube. Turn on and watch, turn off
2006-04-17 22:31:071185

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Sony KV-K29MF heavy duty with sound without grating

After booting, there is sound, no grating. According to the phenomenon analysis, the problem generally lies in the video amplifier and the picture tube circuit. During maintenance,
2006-04-17 22:29:341048

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A case of misdiagnosis of leakage of tube socket

Under normal circumstances, the leakage of the picture tube socket will cause the image to be blurred. It can be slightly improved by increasing the FOGUS focusing voltage. Repaired one recently
2006-04-17 22:28:58592

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Consequences of forgetting to plug in the grounding wire of the picture tube

The Consequences of Forgetting to Insert the Grounding Wire of the Picture Tube
2006-04-17 22:26:192736

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Hisense TF2901 (TB1251) three no lights on and squeak

It is found that there is a fire in the tube base of the picture tube after power-on. After inspection, there are traces of ignition on the accelerating pole and the grounding end. It is not that the tube base is damp. Re-process
2006-04-17 22:13:591544

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