LG TV cable how to deal with TV cable replacement method

What is LG TV cable?

TV cable, also known as flexible circuit board (FPC). According to industry specifications, it is used for data transmission of moving parts and moving areas, such as the motherboard inside the computer to connect the hard disk, optical drive data line, the motherboard of the cell phone to connect the display data line, connecting the data line between the devices.

The use of plasma TV cables has increased dramatically. When you pick up any appliance today, you will find the row cable inside. Open up a 35mm camera and there are 9 to 14 different wires in there because cameras are getting smaller and more functional. The only way to reduce size is to have smaller components, thinner lines, tighter pitches, and objects that can bend. Pacemakers, medical devices, video cameras, hearing aids, portable computers - pretty much everything we use today has wiring.

How to fix LG TV wires?

1. Open the back cover of the TV, observe the circuit board for any anomalies, mainly to find the parts affected by heat; found that the LCD panel heating is serious, contact with the connecting part of the LCD panel is easy to cause poor contact under frequent hot and cold changes!

Second, disassemble the decoder board, use a magnifying glass to carefully check the contacts, whether there is a false soldering phenomenon.

3. Nowadays, LCD TVs, not many circuit boards inside, basically by the power supply board, logic board, high-voltage boards, can repair the components are not many, bad basically change the circuit board; if the LCD panel is bad, the general repair store can not help.

3. Replacement of LG TV wires.

1. Remove the TAB to clean the TAB glass.

With a fine mouth hot air gun blowing while tearing the TAB pay attention to temperature control, generally about 200 degrees is more appropriate. Be careful not to blow the screen film.

Apply a small amount of remover evenly on the glass, and gently wipe it with a cotton swab to remove the ACF glue left on the glass. If some glue is hard to wipe off, you can also use a thin bamboo board to gently wipe it off. Finally, clean the glass with acetone or alcohol, and then wipe the glass with a dust-free cloth dipped in some acetone or alcohol (pay attention to cleaning the glass and TAB front and back), and then affixed to the ACF. when cleaning the row of wires, pay attention to wipe along the wires, so as not to wire activity caused by wire contact short circuit.

Second, paste the ACF glue.

The glue should be affixed to the middle of the ITO as much as possible, not close to the edge of the glass or the root of the panel ITO. The length of the ACF glue is preferably more than about 1 cm, and the length should not be shorter than the alignment. Tools are needed, high quality pointed tweezers scissors. After affixing the ACF, use a hot press screen iron to move back and forth lightly pressed left and right (similar to ironing clothes), so that the adhesive paste auxiliary to the glass. Do not tear off the ACF adhesive protective film first after pasting, wait until the screen is fixed on the heat press platform to start the alignment before tearing off the protective film. This can try to avoid ACF contamination.

3. Alignment

LCD screen on the heat press platform, you need to adjust the position, so that the cutter head just fell on the ITO, can not be pressed ITO root corrugation, from the root of the hair about the distance, so as not to heat pressure when the heat pressure cloth deformation squeezed to the glass ITO root glass corrugation. After adjusting the position of the screen, fixed with two magnets. Be careful with the magnets to be gently held and placed so as not to damage the LCD screen.

In the alignment to understand the structure of the screen TAB line to be repaired, can not be on the wrong pins. Can be removed before the line with a microscope to observe the alignment marks, to ensure that the line to the line in mind. There are alignment marks at both ends. For example ◎ + ± ○ ⊙ first hand on the line in the nearest position, and then use a hot repair screen iron to gently press the line to move the line to the correct position.

4. Pre-pressure

After alignment, pad the hot press pad (the length of the hot press pad is the same as the length of the ACF adhesive). Pre-pressure for about 3 seconds, pre-pressure pressure should be reduced to about 0.1MPA. After pre-pressing, if there is no offset in the alignment, you can proceed with this pressing operation. If the alignment is offset after pre-pressing, you need to adjust it by pressing the moving alignment with the press screen iron.

5. This pressure

The hot press starts a few minutes to reach the set temperature. When the temperature indicator is found to change from one color to another, it means the set temperature is reached. This pressure can be carried out. Pressure temperature is generally 200 degrees, the pressure is generally 0.2MPA.

Some screens are not offset after pre-pressure alignment, but the alignment is offset after this pressure, you need to increase the pre-pressure time and pressure, you can pre-pressure several times.