AD Backlight Diode For Huawei And Vivo (5Pcs)

Every Huawei and Vivo motherboard with an LED-backlit display has a light section built around the same core group: a light IC, a boost coil, an output capacitor, and a diode. This diode's job is to direct current from the boost coil into the display panel while blocking reverse flow. When it shorts or opens, the symptom on the bench is almost always the same — the phone powers on, you can hear notification tones, sometimes you can even feel the screen respond to touch, but there's no image because the backlight never lights up.You'll come across this fault under a few different names depending on how the customer describes it: dead phone with sound, dim display, backlight not working, hang on logo with black screen, or dead after flash. Not every one of these is a diode fault, but the diode is cheap enough and quick enough to swap that most experienced technicians check it early in the diagnostic chain, especially once the light IC and boost coil test fine on the multimeter.This 5-piece pack means you don't have to reorder every time you lose or damage one during rework. SMD diodes at this scale are small and easy to send flying with a hot air gun if your airflow is too aggressive, so keeping spares on hand cuts down on repeat trips to the parts drawer mid-job.Where it fits in the repair workflow:Diagnosing a backlight fault usually starts with a visual board inspection and a continuity check on the light circuit. Once you've confirmed the light IC is getting supply voltage and the boost coil isn't open, the diode is next in line. Testing it with a multimeter in diode mode should show a normal forward voltage drop in one direction and no reading in reverse — if you get a short both ways or no reading either way, the diode has failed and needs replacing.Reflow work on this component calls for a controlled hot air station with fine nozzle control, a stable PCB holder to keep the board from shifting mid-solder, and flux to protect the surrounding pads. Because the diode sits close to other light-section components, precision matters more than heat — too much airflow risks lifting neighboring parts.Why technicians keep this in stock:
Light section faults show up often enough on Huawei and Vivo repair jobs that having this diode pre-stocked saves diagnostic time. Rather than pulling a donor board or waiting on a supplier order mid-repair, you go straight from diagnosis to reflow. For a repair shop running multiple jobs a day, that turnaround difference adds up.This component works alongside other light-section repair tools you'll already have on your bench — a boost coil kit, a light IC stock for the same chipset family, a fine-tip hot air nozzle, and a board holder. If you're stocking up for backlight repairs specifically, it's worth pairing this with a light IC (LM36274, LM3532, or similar depending on the board) and a matching boost coil so you're not stuck mid-repair waiting on one missing part.Handle the diodes with anti-static precautions during storage and installation — SMD components in this size range are sensitive to static discharge, and a damaged diode straight out of the pack will give you a false negative on your next diagnostic pass.