Are you the TV manufacturer(factory)?

Yes, we are. We are an LED TV OEM factory with 20 years of experience. Welcome to share your ideas with us. It’s our pleasure to provide the best TV solution for you.

What is your MOQ requirement?

Our MOQ is one model per 20GP and two models mixed loading in one 40HQ. Sometimes our MOQ is flexible, half of a 20-GP container is acceptable.

Is it possible to buy a sample?

Yes, it is. A sample is available to buy. However, our sample may charge double the normal price, which includes the following two parts: - Customization and testing fees - The additional fees cover the engineering costs for us to customize and test the product according to your requirements. - Sample deposit - An extra unit price is collected as a deposit. Once you place a formal bulk order after the sample order, we will deduct this deposit amount from the total fees of your bulk order. This charging method ensures that we can customize and test the product specially for your needs, and also guarantees that once you formally place the bulk order, we can start production immediately without impacting delivery time.

How long is the delivery time & Warranty?

Mass order: 30 days after the deposit arrival and artwork confirmation. Non-customized Sample: three days. Customized Sample: 7-10 days. Warranty: 1-year by default. Extra cost for extension.

TV Manufacturing Process: How TVs Are Made in a Factory

Name: Mianhong
Brand: Mianhong
Rating: 4.8 (1 reviews)

The LCD TV production line is a complex assembly process involving precision assembly in multiple links. In the raw material preparation stage, the factory needs to purchase core components such as LCD panels, casings, and circuit boards, and conduct warehousing inspections. The assembly of the LCD panel is a key step. It requires first installing the backlight, accurately assembling the panel and connecting the cables. Motherboard assembly requires the installation of various electronic components on the circuit board, such as signal processing chips, power supplies, etc. After assembly, the LCD TV also needs to undergo comprehensive functional testing to check image, sound and other effects. After passing the test, it enters the packaging and shipping process. Unqualified products need to be reworked and repaired. Every step of the entire production line must be strictly controlled to ensure the speed and efficiency of the assembly line and the high reliability of the product.

LCD TV manufacturing places high demands on production line quality control and optimization, which requires close cooperation between various departments to produce high-quality TV products.

Today in this article, we will be taking Mianhong as an example, to verify how a bulk order can be completed.

Raw material preparation and Incoming Quality Inspection

Before production begins, all major components are prepared and inspected according to the production order and bill of materials (BOM). For LCD TVs, the display panel is one of the most important components, so proper incoming inspection and batch traceability are essential.

At Mianhong, incoming LCD panels are recorded by batch before they are released to the production line. We keep the identification information from the tags attached to the protective foam boxes, allowing each batch of panels to be traced back to its incoming records. We also select a sample of panels from each incoming batch for quality inspection before mass assembly begins.

The same preparation process applies to other key materials, including plastic housing parts, mainboards, power-related components, cables, accessories, and packaging materials. Materials that meet the required specifications are classified and stored in the warehouse, ready to be issued to the production line according to the production plan.

LCD Panel(open cell)

LCD panels are the core display components of a TV(usually taking over 70% total value of a single TV), and their quality has a direct impact on the final picture performance. According to the TV model and production requirements, we source LCD panels in different sizes and resolutions from qualified panel suppliers.

When each batch of LCD panels arrives at our factory, the incoming materials are recorded before being released to production. We keep the identification information shown on the tags attached to the protective foam boxes, including the relevant batch information, so that the panels can be traced throughout the manufacturing process.

Before mass production begins, a sample of panels is selected from the incoming batch for quality inspection. The inspection checks for issues such as damaged panels, abnormal pixels, display defects, scratches, and other visible abnormalities. Dedicated testing equipment is used to help identify display problems that may not be obvious during a simple visual inspection.

Only after the incoming inspection is completed are the panels classified and prepared for the corresponding production order. This process helps us maintain batch-level traceability and identify potential panel quality issues before the panels enter the assembly line.

Plastic/Metal Housing(cabinet) Parts

In TV manufacturing, the term “cabinet” refers to the outer housing of the television, not a piece of furniture used to hold a TV. Depending on the TV design, the cabinet may include the metal rear cover, plastic rear housing, front frame, bezel, and other structural parts that protect the internal components and determine the overall appearance of the finished TV.

For each production model, cabinet and housing parts are prepared according to the required specifications, including dimensions, material, color, surface finish, and mounting positions. Before the parts enter production, incoming quality inspection is carried out to check for issues such as cracks, missing corners, deformation, scratches, coating or spraying defects, and other visible abnormalities.

For batch management, inspected materials are identified with QC status markings after the incoming inspection. This allows production personnel to quickly distinguish materials that have passed inspection and are ready for assembly from those that require further checking or handling.

For metal TV rear covers, for example, a batch of panels may be stored together in the warehouse before production. Once the inspection has been completed and the materials meet the required specifications, the corresponding QC identification is applied before the parts are released to the production line.

Motherboards and Electronic Components

The motherboard, also commonly referred to as the mainboard, controls many of the TV’s core functions, including signal processing, smart TV operation, audio, connectivity, and communication with the display panel. Since Mianhong does not manufacture motherboards in-house, we work with qualified motherboard suppliers according to the specifications of each TV model.

When motherboards arrive at our factory, they are stored and protected carefully to prevent damage during handling and storage. As shown in the photos, individual motherboards are separated in protective packaging and further protected with bubble bags. Before they are released for production, our team checks the boards and their identification information to ensure that the correct components are prepared for the corresponding production order.

Other electronic components and accessories are also prepared according to the product BOM (Bill of Materials), ensuring that the required materials are available before assembly begins.

Smaller electronic boards and components, such as T-Con boards, button boards and speaker assemblies, are handled under the same incoming quality control approach. We conduct pre-production sampling inspections on these components to verify that the incoming materials are functioning normally and suitable for assembly before they are released to the production line.

Accessories and Packaging Materials

In addition to the main TV components, each production order also requires a range of accessories and packaging materials. Common TV accessories include remote controls, user manuals, TV stands or legs, screws, power cords, and other model-specific items. These materials are prepared according to the product BOM (Bill of Materials) to ensure that the correct accessories are matched with each TV model.

Before production, the accessories are also checked to confirm their quantity, specifications, and basic condition. After inspection, the required accessories for a TV set can be grouped and packed together in a protective plastic bag, making it easier for assembly workers to identify and include the complete accessory set with the finished TV.

Packaging materials, including cartons, protective foam, plastic bags, and other cushioning materials, are also prepared and inspected according to the product specifications. This helps ensure that the finished TVs and their accessories are properly protected during storage and transportation.

Warehouse Preparation

Once the incoming materials have passed the required inspection, they are classified and stored in the warehouse according to their type, model, and production requirements. Components and accessories are prepared based on the production schedule and BOM, so that the required materials can be supplied to the assembly line when a bulk order begins. Proper warehouse preparation helps keep the production process organized and reduces the risk of material shortages or incorrect components being used during assembly.

2. LCD panel assembly - Assemble the LCD panel into the rear case, connect the cables and backlight, etc.

Backlight installation: Install the LED light strip to the appropriate position inside the rear casing and fix it.
Optical film lamination: Laminate optical films, such as diffusion films, brightening films, etc., on the backlight in order to even out the light and improve the display effect.
LCD panel assembly: Carefully place the tested LCD panel into the rear case and accurately align the position of the backlight. Assembly is usually accomplished using a robotic arm.
Flat cable connection Use a flat cable to connect the connection terminals on the LCD panel to the backlight and circuit board. The cables should be arranged neatly and the connectors should be firm.
Screw fixation: Use special screws to fix the LCD panel to the rear case. It should not be too loose or too tight.
Inspection After the assembly is completed, perform a visual inspection to ensure that the panel is not displaced, the wiring is neat, and there are no loose problems.

This step is crucial to the product’s optical performance and service life, and assembly must be completed carefully to ensure the LCD effect.

3. Motherboard assembly - Installing various electronic components on the circuit board, such as main control chip, power board, etc.
Can skip this part because we have motherboard supplier

SMT Assembly – Use surface mount technology to install various electronic components such as resistors, capacitors, chips, etc. on the main control circuit board.
Plug-in assembly – Use plug-in technology to install some large components, such as power interfaces, switches, connectors, etc.
Dispensing – dispensing glue at certain locations on the board to fix specific components.
Component assembly – manually assemble some components such as power management chips and audio processing chips to designated locations.
Wire soldering – Use a soldering station to solder the chip to the gold fingers on the board and connect the wires.
Inspection Testing – Optical inspection and electrical performance testing of the assembled motherboard.
Repair and adjustment – If there is a problem, dismantle the board and repair it to ensure the quality of the motherboard assembly.

Motherboard assembly requires precise control of each step because the performance of the motherboard directly affects the picture and sound effects of the LCD TV. We have various motherboard suppliers and they often provide us with the completed motherboards. All Mianhong need to do is to put the motherboard in the right position, and assemble the cable from the LCD panel to the motherboard.

4. Functional testing - Functional testing of the assembled circuit board, detecting images and sounds, etc.

Power-on test: Connect the power supply and check whether the LCD TV can be turned on normally.
Image test: Check whether the display screen has debris, dirty spots, scratches and other problems, and whether the display color, contrast, brightness, resolution and other parameters are up to standard.
Sound test: Use the audio signal source to check the volume, sound quality, left and right channel balance, etc.
Key test: Check whether each key function is normal, such as channel, volume, menu keys, etc.
Interface test: Check the connection and signal transmission function of USB, HD, earphone, and other interfaces.

Functional testing ensures that the TV’s performance meets design specifications and user requirements. Unqualified products will be reworked, repaired, and adjusted before being tested again.

5. Housing assembly - Install the tested circuit board into the front housing and connect the components and interfaces.

Carefully place the main control circuit board that has passed the assembly test into the rear housing of the LCD TV.
Align the assembled LCD panel components into the rear case and securely connect them.
Place the front shell on the rear shell and integrate the positions of the components.
Use screws to secure the front and rear cases tightly.
Connect speakers, control buttons and other components to the corresponding interfaces on the front case.
Use connecting cables to connect the interfaces on the motherboard to speakers, control boards, power boards, etc.
Conduct a visual inspection to ensure that the interfaces of each component are firmly connected and the wires are arranged neatly.
Connect the test signal source and check the image and sound effects.

The quality of the shell assembly directly affects the appearance and service life of the product, and requires careful assembly to ensure the reliability of the interface connection.

6. Packaging and shipping - products that have passed the test are cleaned, packaged, labeled and shipped to the shipping area.

Cleaning the TV: Use special tools and materials to clean the outer shell of the assembled LCD TV to remove fingerprints, dust, etc.
Film and labeling: Put a protective film on the TV and label it with name, specifications, barcode and other labels.
Packing boxes: Put the qualified LCD TVs into pre-packed cartons or plastic packaging boxes.
Marking on the box: Put a mark on the box to indicate the brand, model, quantity and other information.
Warehousing and loading: Put the packaged products into containers in the designated warehousing area for temporary storage.
Shipping: According to the order, take out the packaging box from the storage cabinet and load it onto the truck for distribution and shipping.
Record and traceability: Scan the product serial number and barcode and record it for audit and subsequent traceability.
Retour processing: sorting, reworking or scrapping products returned due to quality problems.

The packaging and shipping link completes the packaging and transportation of finished products and is an important link connecting manufacturing and sales.

Conclusion

The production process of LCD TVs can be said to be a perfect combination of modern industrial equipment and precise assembly operations. From raw material preparation to final packaging and shipment, each link requires a high degree of concentration and meticulous operation to assemble complex LCD panels, circuit boards and other components into an exquisite consumer electronics product. Factories need to continuously optimize assembly lines, improve machine automation levels, and strictly control the quality of each step to minimize failure rates. At the same time, production personnel are also very demanding, requiring professional skills and patience to ensure that the assembly quality of each LCD TV meets the design specifications. Only by comprehensively improving management, operations, equipment, materials, and other aspects can the LCD TV production line operate efficiently and stably and deliver high-quality TV products that satisfy customers.

We are looking for long term customers and we will offer the best price!