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I have a problem with a iphone 5 that had water damage. The iPhone worked fine no problem at all. The only problem it had was making calls. When you made a call you couldnt hear the person or the person couldnt hear you. audio IC problem i think. So i have opened the shield cleaned the logicboard with isopropanol. After that i made a call and it worked. So i closed the iphone but after that the problem came back. Cleaned the logicboard again and put the phone together, i wanted to test the phone, but phone stopped reading sim. I noticed that imei was gone and baseband was blank. Did some research and could be the U601_RF baseband power supply failure. I marked where there was corrosion
also a resistor of conductor is been missing from the logicboard.
what kind of component is the missing one ? With the missing component the sim has been read, and also the live call were successfull. I want to know how i can troubleshoot which component i need to fix these problems. I have micro soldering experience and the right tools to do this repair.
iOzzy, okay so the corrosion was around the touchscreen IC, should not interfere with your baseband. The missing part is reference designator C357 which is a 10UF 6.3V 20% capacitor in a 0402 package. It is part of the power management circuitry and should be replaced. check on U601_RF and may be a reflow would work.
both of the missing components are capacitors. everything should work fine even without them. Like said before - check U601_RF. it´s a memory for BB Im working on a iPhone 5 with same symptoms, but not water damage. Phone was dropped.
This problem is U601–must be replaced, not re flowed. It is a glass ic and has a dependence on another big ic that also must be replaced at the same time. Few people are capable of this work.
same error here with a water damaged 5. Any update on the replacement capacitors?? any luck with reflows?? email me with updates or respond back here thanks! anonymiss.az@gmail.com
https://www.youtube.com/watch?v=IIkw3kAd…
So for a wiped out baseband/no meid/searching I should replace what exactly?
Thnxxxx for all i heat the u601_rf then i show on setting about i found imei and modem firmware auto fill but not show imei on dialpad and show serching network plz help me
