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iPhone 7 Update System error 4013 repair

iPhone 7 Update System reported an error of 4013. After detection, it was found that it was caused by the power supply S5 Baseband Short circuit. A 2.2k resistance was connected from 1.8V Baseband of RAM to S5 Baseband, and Update System passed smoothly.

iPhone 7 Update System error 4013 repair

Machine model:iPhone 7

Fault phenomenon:Update System reports error 4013

iPhone 7 Update System error 4013 repair

iPhone 7 Update System error 4013 repair Figure 1.

Fault analysis: when iPhone 7 reports error 4013, consider Baseband first.

Maintenance process: the machine was disassembled and detected.Baseband power supply had traces of welding.Remove Baseband power supply, found that there is had Fly wire (connecting two solder joints with thin insulated wires)below.

iPhone 7 Update System error 4013 repair

iPhone 7 Update System error 4013 repair Figure 2.

The Baseband.071 Baseband is connected to the Baseband.00 Baseband, and then the PAD c1071 is connected to the new Baseband.

iPhone 7 Update System error 4013 repair

iPhone 7 Update System error 4013 repair Figure 3.

Update System was successfully activated and the test function was normal.

iPhone 7 Update System error 4013 repair Figure 4.

iPhone 7 Update System error 4013 repair Figure 5.

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