Here i have an iPhone 12 Pro Max that come in with no WiFi, no IMEI and a broken WiFi antenna.
The board had lots of oxidized pads after a drop i think! I just reballed the boards with the low melt solder, changed the WiFi antenna and after that the phone was working, IMEI and WiFi are working!
Some of the tools and supplies i use all time
- Sugon T26 soldering station with JBC C210-018, JBC C210-002 and JBC C210-020 tips
- Quick 861DW Hot Air Station
- Gordak 952-A (I'm using this only for it's soldering iron)
- Seek Compact XR Thermal Camera
- UNI-T UT171B Multimeter
- HY3005D Power Supply (very old)
- Kingbo RMA 218 Flux
- Baku BK-227 Flux
- Cynel Soldering Wire 0.5mm and 0.7mm
- Mechanic XGS40 158C Solder Paste
- Relife RL-404 138C Solder Paste
00:00 - Intro
01:07 - Opening the phone
01:56 - Initial inspection
02:40 - Taking the motherboard out
03:48 - Separating the motherboard
06:04 - Preparing the motherboard for reball
07:04 - Cleaning the old solder
08:04 - Reballing the motherboard
10:34 - Soldering back the 2 boards
11:35 - Testing the phone after reball
13:00 - Changing the WiFi antenna
14:05 - Assembling the phone
15:20 - Testing the phone after repair
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