Do friends who have just entered the industry often encounter this situation? There are dead lights and dark areas on the display screen, and the maintenance master asks for a price of thousands of yuan. Actually, many small problems are used​ ​Special repair agent​​It can be done, but the key is to buy the right materials. Today I will take you to find out the tricks and pay less IQ tax.

What are the conditions for repairing agents

• ​​Lamp bead oxidation​​: Large-area color difference occurs after rain (mostly on outdoor screens)
• ​​Solder joints​​: Poor contact caused by frequent handling (common rental screen)
• ​​Coating falls off​​: Surface atomization affects the display effect (high incidence of old screens for more than three years)
• ​​Electrostatic breakdown​​: The regular bad points that suddenly appear in autumn and winter

Last week, I saw a case with my own eyes: there were 8 bad spots in the shopping mall's large screen, and the maintenance team offered 20,000 yuan to change the module. As a result, the master clicked the conductive glue and repaired it, and the material cost was less than 50 yuan. So, it is important to judge the type of problem first and then decide how to deal with it.

Analysis of three types of core restoration materials

​​Conductive repair agent​​：
• Silver-containing ion conductive adhesive (resistance value ≤0.01Ω)
• Suitable for welding joint reinforcement and line bridge
• Curing time 3-5 minutes, withstand low temperature of -40℃

​​Insulating repair agent​​：
• Nano-scale silica composition
• Solve electric leakage and short circuit between lamp beads
• Withstand voltage value up to 3000V/mm

​​Protective coating​​：
• Hydrophobic and oleophobic double effect membrane
• Light transmittance loss <2%
• Anti-UV aging lifespan increased by 3 times

Key reminder: Never use ordinary 502 glue! That thing will corrode the lamp bead coating and will recur after three months of repair. There was a store owner who had a cheap picture, but he turned the P4 screen into a "pork face", and finally he had to replace the entire screen.

Regular procurement channels inventory

1. ​​Electronic Materials Market​​: Find a counter with ISO certification, remember to ask for the MSDS material safety data sheet
2. ​​Industrial products e-commerce platform​​: Identify the store with quality inspection report and read the real maintenance cases in the comment area
3. ​​Equipment supplier​​: Some manufacturers provide supporting consumables, which are more secure in adaptability
4. ​​Industry Exhibition​​: New materials are released every year in the photoelectric exhibition, and you can get trial installation

There is a tip for saving money: you must use it for repairing agents​​Precision dispensing pen​​! The effect of a 0.3mm pen tip and 1mm is ten times worse, so don't let the tool hold back. Last time I saw someone dipped a toothpick in glue to repair the screen, but the glue amount was not well controlled and it caused a short circuit, which was really not worth the effort.

Use pit avoidance manual

• ​​Environmental Control​​: The curing time is 3 times longer when the humidity exceeds 70%.
• ​​Temperature control​​: The optimal construction temperature is 15-25℃, and a heating pad should be used to assist the low temperature.
• ​​Dosage standard​​: The amount of dispensing of a single lamp bead is 0.02ml of gold value
• ​​Safety protection​​: You must wear a gas mask, volatile gas is not a joke

Let me tell you about the inside story of the industry: there are really easy to use repair agents​​Thixotropic index​​parameter. The colloid with an index of between 0.9 and 1.1 will neither flow nor draw, which is very easy to repair. For those miscellaneous goods that do not have parameters, it is recommended to pass directly.

Effect verification method

1. ​​72-hour aging test​​: No recurrence after three consecutive days
2. ​​Temperature difference impact test​​: -20℃ to 60℃ cycle three times
3. ​​Impedance detection​​: The multimeter measured the resistance change of repair point is <5%
4. ​​Grayscale restore degree​​: Play 16th-order test map without fault

I remember when I was inspecting my friend last year, I found that there was a slight color difference in the repair area. Later I figured it out​ ​Color temperature compensation​​If it is not done well, under the same brightness, the refractive index of the repairing agent and the original coating will have abnormal color rendering. Therefore, color test pictures must be played during acceptance, and you cannot only look at monochrome pictures.

Next time you encounter a minor problem with the display screen, don’t rush to find a repair team. Prepare a few professional repair agents and may save thousands of repair costs. However, I would like to remind you that repair agents are not panacea, and you still have to find a professional to deal with large-scale damage. Have you ever experienced any crashing of your own electronic equipment repair? Say it out and make everyone happy and experience it increases.

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