339S0223 For iPad 5/Air1 A1474 Wifi IC

When an iPad Air 1 or iPad 5 comes into your workshop with WiFi greyed out, no networks found, or the WiFi toggle stuck off, the 339S0223 IC is usually the first thing you check at the U5800 position. This chip handles WiFi signal processing on the A1474 board, and once it develops a dry joint or cracks from drop damage, the tablet loses wireless connectivity even though every other function works fine.You'll find this IC listed as a high-temperature type, reflowing at around 183°C. That matters on your rework station, because using the wrong profile on a high-temp IC either fails to reflow the balls properly or overheats surrounding components on a tightly packed board. Set your hot air station to match this temperature class before you start, and always check your nozzle size against the IC footprint so you don't blow heat onto neighboring parts.This part is compatible with iPad Air 1 (A1474, A1475, A1476), iPad 5, and iPad Mini 2 boards that share the same WiFi module layout. Before you order, confirm the board revision under your microscope and match the existing chip markings to 339S0223 — swapping in the wrong WiFi IC variant leads to a board that powers on but never picks up a network, or worse, one that won't boot past the Apple logo.The repair workflow here follows standard PCB rework steps. Start with a full visual inspection under your microscope to rule out corrosion or lifted pads. Clean the board and remove the old IC with controlled hot air, keeping your airflow tight to avoid disturbing nearby passives. Clean the pads, apply fresh flux, and reball the new 339S0223 using a matching stencil, since ball size mismatches cause bridging or opens after reflow. Align the IC precisely under magnification, reflow at the correct high-temp profile, then test WiFi function before closing up the device.A lot of Pakistani technicians see this exact fault pattern: dead WiFi after a drop, WiFi module missing after a botched DIY repair, or WiFi that disappears after a liquid damage clean. In each case, checking U5800 with your multimeter for continuity and shorts saves time before you commit to a reflow. If the IC tests shorted to ground, that confirms your suspicion and you move straight to replacement instead of chasing software resets that won't fix a hardware fault.

Keep this IC in your parts bin alongside your other iPad board-level components. It pairs naturally with your existing reballing kit, PCB holder, and test box setup, since WiFi IC replacement is rarely a standalone job — you're usually already on the board for a broader repair or ongoing diagnostics. Stock genuine-spec ICs rather than unmarked or relabeled chips, since a mismarked IC either fails immediately or causes intermittent WiFi drops that bring the customer back a second time.This IC ships as a standalone replacement chip, so you'll need your own reballing stencil, flux, and hot air rework station to complete the job. If you're new to iPad board-level repair, practice your reflow profile on a scrap board first — the density around U5800 leaves little room for error, and a shaky hand with the hot air gun damages more than it fixes.