Salta al contenuto principale

Aggiusta la tua roba

Diritto alla Riparazione

Store

Introduzione

Check out our guide today and you will learn how to pinpoint the faulty cause with the help of the error code and troubleshoot iPhone XR water damage step by step.

Panoramica Video

  1. Here it writes: liquid damage.
    • Here it writes: liquid damage.

  2. Check the motherboard first. The motherboard is not deformed. But we can see signs of water damage here.
    • Check the motherboard first. The motherboard is not deformed. But we can see signs of water damage here.

    • Let’s assemble the phone and test. Press the power button to turn on the phone. The phone enters recovery mode automatically.

    • Connect the phone with computer and restore via iTunes. Error 14 appears.

    • Judging by iTunes error codes and their corresponding analysis, the fault might be caused by damage of the NAND flash chip or malfunction of NAND relevant circuits.

  3. Take out the motherboard. We can see signs of water damage around the NAND flash chip. Let’s clean with PCB Cleaner first.
    • Take out the motherboard. We can see signs of water damage around the NAND flash chip. Let’s clean with PCB Cleaner first.

    • Then run diode mode measurement of the three rails of NAND power supply. The measured value is normal. Which indicates that NAND power supply relevant circuits haven’t shorted.

  4. Continue with voltage measurement of the three rails of power supply. Connect the battery connector with the DC Power Supply. The current reading on the ammeter is 50mA. Which indicates that the motherboard is leaking electricity.
    • Continue with voltage measurement of the three rails of power supply.

    • Connect the battery connector with the DC Power Supply. The current reading on the ammeter is 50mA. Which indicates that the motherboard is leaking electricity.

    • Get the motherboard powered on with tweezers and run voltage measurement of the three rails of power supply. Judging by the measured value, 2.63V and 0.9V power supply are normal. The measured value of 1.8V power supply is 2.6V. Which is abnormal.

  5. SKIP THE UPGRADE

    Save by fixing with an all-in-one kit.

    Shop iPhone Fix Kits

    SKIP THE UPGRADE

    Save by fixing with an all-in-one kit.

    Shop iPhone Fix Kits
  6. We need to focus on relevant circuits of the main power supply and the 1.8V power supply of NAND.
    • We need to focus on relevant circuits of the main power supply and the 1.8V power supply of NAND.

    • For better inspection, we need to remove metal shields first.

    • There are four metal shields covering iPhone XR motherboard. Let’s start with the one covering CPU.

    • Remove the metal shield covering CPU. Check carefully and we can see no signs of water damage here.

  7. Let’s continue with the metal shield on the backside.
    • Let’s continue with the metal shield on the backside.

    • Remove the metal shield on the opposite side. We can see obvious signs of water damage around ICs here. We need to remove these moldy ICs for further cleaning.

    • Remove these moldy ICs with hot air gun one by one. Then clean their moldy bonding pads one by one.

  8. Now, let’s connect the battery connector with the DC Power Supply. The current reading is 40mA, which still means electricity leaking.
    • Now, let’s connect the battery connector with the DC Power Supply. The current reading is 40mA, which still means electricity leaking.

  9. We need to check components under the remaining two metal shields.
    • We need to check components under the remaining two metal shields.

    • Remove the remaining two metal shields. We can see obvious signs of water damage around ICs here.

    • Remove these moldy ICs and clean their bonding pads.

  10. Again, connect the battery connector with the DC Power Supply. We can see that the current reading is normal this time. The electricity leaking problem has been fixed.
    • Again, connect the battery connector with the DC Power Supply. We can see that the current reading is normal this time. The electricity leaking problem has been fixed.

    • Now we need to apply paste flux to these bonding pads. Heat with Hot Air Gun and solder those previously removed ICs to the motherboard.

  11. Now we can assemble the phone and test.
    • Now we can assemble the phone and test.

    • Press the power button to turn on the phone. The phone enters recovery mode automatically. Connect the phone with the computer and restore via iTunes. Once completed, the phone goes to the home screen automatically.

    • Run function test. All going well.

Phryne

Membro da: 17/11/2019

10.251 Reputazione

80 Guide realizzate

Aggiungi Commento

Visualizza Statistiche:

Ultime 24 Ore: 2

Ultimi 7 Giorni: 12

Ultimi 30 Giorni: 71

Tutti i Tempi: 320