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iPhone 6 Update System error report 56 repair
Machine model:iPhone 6
Fault phenomenon:Update System error 56
Fault analysis:Update System error 56 is mostly caused by NFC chip.
Maintenance process: remove the main NFC chip u5301_diode value rcuits from XTRF to CPU are measured.
iPhone 6 Update System error report 56 maintenance Figure 1.
It was found that D2 pin data transmitted Measuring diode value OverLoad, and the CPU was disconnected.
iPhone 6 Update System error report 56 maintenance Figure 2.
iPhone 6 Update System error report 56 maintenance Figure 3.
3. The line from D2 pin to CPU has a test point pp3124_RF, when measuring diode value of this test point, it is found that Measuring diode value is normal, so you can directly Jump wire to D2 pin from this test point.
iPhone 6 Update System error report 56 maintenance Figure 4.
iPhone 6 Update System error report 56 Figure 5.
iPhone 6 Update System error report 56 maintenance Figure 6.
Fly the wire and install the NFC core (the wire used must be enameled wire to avoid Short circuit).
iPhone 6 Update System error report 56 maintenance Figure 7.
Enter Recovery mode,Update System,Update System passes, and the maintenance is finished.
iPhone 6 Update System error report 56 maintenance figure 8.
