LED Bar Use for Lg/Vestel 40inch Led Backlight Strip

Today to repair a LED Bar Use For Lg 40inch, as an example, talk about changing the light bar notes.

01. Clean up foreign objects on the workbench. It is best to pad a thin layer of foam. Prevent nails on the bench or move the machine to bring the screen scratches, chassis scratches.

02. The machine will be gently placed on the workbench buckle, when putting down the screen do not exceed the corners of the workbench, so as to avoid uneven pressure pressure injury LCD screen.

03. Screws should be removed in a small box prepared in advance, not directly on the bench, and remember the length of the nail. When placed on the workbench, the nails may roll into the bottom of the LCD screen by mistake when you are not paying attention. Remember the length of the screws, so as not to damage the LCD screen when installing the nail is too long.

04. When opening the back of the case to move gently, in order to prevent the back of the case there are speakers, buttons, online wires are pulled off, to prevent the back of the case to touch the screen edge board, so that the PCB and COF disengagement.

05. This machine is taped on all sides, first use the blade to cut the tape at the corners and tear it off. And then the other three sides of the side plate other than the iron frame of the one-time scratch, so that you can not tear the tape, after the installation also do not need to seal the tape. Touch the nail position with a screwdriver into the nail will be removed.

06. Remove the screen wiring is best to remove the logic board on one side, in order to prevent the removal of the screen on one side of the uneven force caused by the card to fall off. Causing unnecessary trouble, after all, repair logic board than repair screen side of the much easier.

07. Logic board in the test machine, pay attention to insulation, so as not to have the reverse side of the components connected to the iron burn screen motherboard or logic board. Remember.

08. Some machines should be back pad high, so as not to compress the machine power supply board or motherboard. For example, LG has a model such as this.

09. Be careful to disengage the PCB side plate, it is best to use adhesive paper to fix it back on the screen, or use scrap PCB board to PCB board and screen parallel fixed. This will reduce the COF aging or touching the PCB board or COF when removing the screen, the installation of vertical lines and vertical tape occurs.

10. If the screen is sticky, use the film to scratch open the screen, the assembling machine should also pay attention to the problem of pads falling off, so as not to fall under the screen when installing, and crushing the screen when shelling.

11. Carefully hold the screen out by hand or take it out with suction cup and put it in a safe place. It is better to wear rubber gloves and anti-static when operating.

12. Take out the polarizer guide plate and reflective paper together and put them in a safe place, this is to prevent the guide plate from falling into dust. In the operation process, the side hit the light guide plate do not touch with your hands. And ensure that the reflective paper polarized paper do not fold out of the print.

13. Replacement of damaged light bar, be sure to clean the residual glue on the aluminum plate, if the old light bar do not can be torn off directly, so that you can take off a lot of glue, easy to clean up. Installation, pay attention not to damage the lamp beads.

14. Reflective paper guide plate polarizing paper and put up on the top of the machine, sixty or seventy degrees up, the reflective paper alone out of the put, and then together with the guide plate polarizer together, check whether the guide plate is installed in place, remove the guide plate to remember the guide plate is above the pads or within the pads. Do not touch the lamp beads when putting the light guide plate.

15. If you want to extend the life of the light bar, you can use imported thermal adhesive before installing the light bar, or after the installation of the pads in the anti-collision beads will be squeezed with the light bar and the light guide plate.

16. found that there are dirty spots, I am using the old strip head wrapped thermal adhesive to stick off, try not to directly use your hands.

17. Measure the backlight, put the screen against the upper edge of the bezel, leaving a certain angle, watch the back of the screen to remove any dirt.

18. screen all loaded, boot test, such as a small amount of dirt, you can gently lift the corner of the screen into the homemade tools, stick off the dirt.

19. Connect the screen line to test the screen line in place, inserted diagonally may burn the screen, logic board, bringing unnecessary trouble.

20. Check whether all four corners of the box, if necessary, the four corners can be fixed with adhesive tape, and then turn off the machine, you can An iron frame. At this time to move the machine do not move to prevent the screen run out of the frame, but also to prevent the PCB side plate scratch off.

Above 20, on the 20 it. I would also like to say that, and then careful attention, there are times when you miss, please do not blame yourself, right as a sublimation of maintenance.