LCD TV REPAIR BUSINESS

بِسْمِ اللهِ الرَّحْمٰنِ الرَّحِيْمِ “In the name of God, the Most Gracious, the Most Merciful”

LCD LED TV Repair Business

LCD LED TV Repair Business 

Starting an LCD TV repair business can be a profitable venture, as more and more people are investing in these modern flat-screen televisions.

Here are some steps to follow to start your LCD TV repair business:

1.

Research the market: Conduct market research to understand the demand, competition, and pricing in your area.

This will help you determine if there is a need for your services and how you can position yourself in the market.

2.

Develop your skills: If you don't already have experience in repairing LCD TVs, it is essential to gain the necessary skills and knowledge.

Consider taking courses or getting certified in electronics repair or specifically for LCD TVs.

3.

Create a business plan: Outline your business goals, target market, services offered, pricing, marketing strategies, and financial projections in a comprehensive business plan.

This plan will serve as a roadmap for your business and guide your actions.

4.

Set up your workspace: Find a suitable space to set up your repair workshop.

Ensure you have enough space for workbenches, tools, spare parts storage, and a waiting area for customers.

5.

Secure the necessary equipment and tools: Invest in high-quality tools and equipment that are specifically designed for repairing LCD TVs.

Some essentials include soldering equipment, multimeters, oscilloscope, hot air rework station, and a good collection of spare parts.

6.

Build relationships with suppliers: Establish relationships with reliable suppliers of LCD TV parts and components.

Maintaining strong relationships with suppliers will ensure a steady supply of spare parts at competitive prices.

7.

Determine your pricing: Decide on a pricing structure that covers your costs, including labor, parts, and overheads, while remaining competitive in the market.

Consider offering packages or discounts to attract customers and create customer loyalty.

8.

Create a professional image: Develop a professional brand identity with a unique name, logo, and website.

These elements will help establish your credibility and make it easier for customers to find and contact you.

9.

Market your business: Use a variety of marketing strategies to promote your LCD TV repair business.

Consider traditional advertising methods like local newspapers, flyers, and radio ads, as well as online marketing through search engine optimization, social media, and online directories.

10.

Provide excellent customer service: Focus on providing exceptional customer service to build a strong reputation and maintain a loyal customer base.

Offer warranties, quick turnaround times, and clear communication to ensure customer satisfaction.

Remember that ongoing learning and keeping up to date with the latest technology trends in LCD TVs is crucial for success in this business.

Continuous education will help you stay ahead of the competition and provide the best repair services possible.

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  The working principle of an LCD (Liquid Crystal Display) TV screen involves the use of liquid crystals to produce an image.

Here are the key steps involved:

1.

Backlighting: The LCD screen has a backlight behind it to provide illumination.

This backlight is typically fluorescent or LED-based.

2.

Polarization: The light produced by the backlight is then passed through a polarizing filter.

This filter allows only light waves vibrating in a specific direction to pass through.

3.

Liquid Crystals: The polarized light passes through a layer of liquid crystals.

These liquid crystals are like a viscous fluid that can be controlled by applying an electric current.

When no current is applied, the liquid crystals are in their natural state, which twists the polarized light.

4.

Electric Current: The LCD screen has an array of thin-film transistors (TFTs) and electrodes behind it.

When a specific TFT is activated by applying an electric current, it allows the corresponding electrode to apply a voltage to the liquid crystal pixel above it.

5.

Pixel Control: The voltage applied to each pixel controls the orientation of the liquid crystals.

This manipulation changes the polarization of the light passing through the liquid crystals, either allowing or blocking it from passing through to the next layer.

6.

Color Filters: In full-color LCD screens, there are red, green, and blue color filters located in front of each pixel.

By controlling the voltage applied to each pixel, the amount of red, green, and blue light passing through is adjusted to create a desired color.

7.

Viewing Angle Control: Additional layers, such as diffusers and waveplates, are placed in front of the liquid crystals to control the viewing angle and enhance the image quality when viewing from different angles.

8.

Image Formation: As the polarized light passes through the liquid crystals, voltage-controlled pixels determine the amount of light transmitted.

By controlling the orientation of these pixels, various shades of color and brightness are produced, forming the image on the screen.

9.

Refresh Rate: The LCD screen repeatedly applies electric currents to the liquid crystals to refresh the image on the screen.

The refresh rate determines how quickly the image is updated, typically measured in Hertz (Hz).

Overall, the working of an LCD TV screen relies on the manipulation of liquid crystals through electric currents and various layers to create and display images in vibrant colors and detail.

VGH stands for Vertical Gate High.

It is a voltage used in liquid crystal displays (LCDs) to control the horizontal position of the liquid crystal molecules.

VGH positive 24V to 29V as per panel size

The exact voltage needed for VGH depends on the specific LCD display technology and manufacturer

VGL is the abbreviation for Gate-to-Source Voltage Low, Negative Voltage 

 which refers to the voltage applied to the gate terminal of a field-effect transistor (FET) to control the flow of current between the source and drain terminals.

It is commonly used in the context of FET amplifier circuits and is typically specified as a range of values, such as -5v to -11v

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AST21811A-A212A

NT39548H-5801A

LS0306M2-C1LX

C5209A

C6517A

C6517A

8656-LC530

RM76320FB-61A

RM76150FA-034

NT39538H-1272A

NT39538H-1272B

ILI5271M2AA1

RM76A30FA-906

SDD3293U

SHARP COF

NT3953H-C5208A

C5201A

NT39538H-1295A

PB17C10B1-T6LC1

NT39547H-C1277A

RM76190FB-0AZ

8656-N C560

NT61237H-C6523A/A

Nt61212H-C6517A/A

8697 B CYA7

NT39329H-CO2A5A

8656 M CY61

PCA8842M6

8697 B C562

NT39567H-C5286A

NT39566H-C5284A

RM76370FC-80K

RM76370FA-80A

NT61227H-C1217B

NT61237H-C6523AA

S6CG208-51

8697 A CY79

RM76152FJ-0A8

8656 M CY45B

8651 CCV1B

EK73510Z004A

EK73535-2011A

NT61305H-C52A3A

ST6232-C01

NT61305H-C52A3A

RM76370FC-80K

8697-BC562

TAPE9522-01-4A

RM76320FB-61B

NT39538H-C1172B

MT3807VB/C

CLAA215F

8656 F CYOB

RM76A30FA-906

NT61212H-C6517A

NT39530H-C5209A

8656 M C607

C6517A-A

8656-LC530

1)RM76320FB-61A

2)NT39567H-C5251A

3)NT39538H-C1272A

4)RM76370FC-80K

5)NT39565H-C5263A

6)NT39563H-C6502A

7)RM76311FC-805

8)RM76153FJ-OAI

9)NT61302H-C5290A

10)RM76A30FA-906

11)NT61228H-C6809A

12)NT39538H-C1298A

13)S0327B2-2L

14)NT61227H-C12I7B

15)8656-MCY61

16)8658-BCBJV

17)8656-MCY45B

18)NT61237H-C6523A/A

19)8656-MC607

20)S6CG242-51U

21)NT39562H-C12G9A

22)RM76H30FA-L04

23)8697-BCYA7

24)8698-CC560

25)RM76360FA-808

26)RM76190FA-OAO

27)NT39567H-C5284A

28)NT39538H-C1295A

29)NT39565H-C5253A

30)5253-ACBPQ

31)5253-BCBR3

32)5276-ACBR6

33)8656-MCY61

34)8651-ACBD7

35)8656-MCY40

36)8656-HC502

37)NT39538H-1260A

38)NT39530H-C5204A

39)RM76112FD-032

40)8656-F

41)SSD3272-3U2R4

42)RM76151FH-061

43)NT39538H-C12B9C

44)MT3807VC

45)D10C30G0023-CFOC1SSR

46)SW8003K

47)NT39567H-C5251B

49)NT61203H-C5604A

50)NV1047FHA(L)

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• WhatsApp Support Group

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With the advancement of science and technology, TVs have changed a lot from the earliest black-and-white TVs to color TVs and now to today's LCD TVs. However, after a TV has been used for a period of time, various malfunctions cannot be avoided. Today I will introduce Here are some repair methods for you if your LCD TV breaks down, let’s take a look!

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1. TV hardware failure - TV screen is black and there is sound

Solution: Check the plugs on the back of the TV to see if each plug is in a specific position, and confirm if there is any looseness at the socket. If so, just fix it.

After troubleshooting the socket problem, if the black screen of the TV has not been resolved, then it is a hardware problem. At this time, do not disassemble it yourself. You must contact the relevant after-sales maintenance personnel for inspection.

2. The TV screen suddenly goes black and cannot be started.

Solution: Observe the power indicator light of the TV. If the power indicator light does not light up, it means a sudden power outage and a black screen due to a power connection problem. At this time, you can check whether there is a power outage at home, whether the power plug is loose, and whether the power cord is faulty.

If the power indicator light is on, it is a hardware problem. Users who do not understand the specific internal structure of the TV need to contact after-sales maintenance personnel for testing.

3.TV screen blur

Solution: First, measure whether the clock output of the motherboard is normal, then check the motherboard signal RGB, whether there is any soldering or short circuit in the circuit from the input to the main chip, see whether the capacitor and resistor have changed values, then check the motherboard signal, and the output to the screen. Check whether there is any soldering or short circuit in part of the circuit of the connecting socket. If so, please contact a professional for repair in time.

Another situation is that the TV display is broken. At this time, it may be necessary to replace the TV display to solve the problem of TV screen blur. You also need to contact a professional for repair.

4. TV software failure causes TV to freeze or freeze.

Solution: When you find that the TV freezes or stuck you can download TV Assistant from the TV App Store to clear some useless or stolen memory in the TV. Usually, after installing the software, check whether any participating APK installation packages remain in the TV system. Because some software will leave installation packages in the system after automatic upgrades, which need to be cleaned up in time.

5. Unable to install software applications

Solution: Enter the setting options in the TV system, find the corresponding item, and turn on the switch that the TV manufacturer defaults to disable USB installation of TV software, and you can install it through USB. If you find that you cannot install a third-party application, you can find the installation option of the third-party application in the settings and turn on this option to install the third-party software.

6. There is a problem with the TV parsing package

Solution: Since the user did not download the complete installation package during the download process, just re-download and install it again.

If the installation package downloaded by the user does not match the system version of the TV, there will also be problems parsing the package. At this time, the TV system can be re-upgraded and installed again.

The above are the common troubleshooting methods for LCD TVs. To learn more about home appliances, please contact +923139292880 my WhatsApp number.

Common Problems

Not turning on: The power indicator light does not light up. Usually the power board or motherboard is broken. If it is an all-in-one board, just replace it as a whole. If the power board outputs 12V to the motherboard, it means the motherboard is bad. The second is that the power-on indicator light is on, but the indicator light does not flash when the power button is pressed or the remote control is turned on. Generally, the motherboard is broken.

Black screen at startup: There is sound but no image. This kind of fault is most likely to cause the backlight to be damaged. You can use a flashlight to shine on the screen and you will see the image. There are also cases where the power board is broken and the backlight output voltage is low, causing a black screen. Specifically, you need to use a multimeter to measure whether there is voltage at the backlight output when the power is turned on.

Gray screen at startup: The sound is normal, the backlight is bright, and there is no image on the screen. Usually the problem is the screen. The logic board is broken or the screen is broken. The LVDS cable is loose and the screen will be gray. Disconnect the cable from the logic board to the screen and measure whether the logic board voltage is normal. If it is normal, the screen is broken. If the screen Cof is broken, you need to go to a professional. You can only replace the screen when repairing. If there is a short circuit in Y, you can directly cut off the damaged side to repair it.

Unusual Picture: The motherboard is broken or the screen parameters are incorrect. If the image is white or dark, it may be that the logic board is broken.

Horizontal and vertical lines: Generally, the COF on the screen is broken. A screen pressing machine is required for repair.

📌 Imran Ashraf Electronics Repair Services

Professional LCD/LED TV Firmware, COF Voltages, and Repair Solutions

🔥 Our Services

• COF Voltages Data Download
• LCD/LED TV Firmware Support
• Panel Faults Testing Tips
• WhatsApp Support Group

📥 Download COF Voltages PDF

📚 Books by Imran Ashraf

💬 WhatsApp Support

🎥 Subscribe YouTube Channel