跳至主要内容

iPhone 6 Not Turning On after Dropping into Water


Have you ever met the same accident on your iPhone 6? It's not turning on after dropped into water accidentally. It seems also a very common phenomenon. How to repair it? Of course, we need to diagnose the problem first before detailed repair on the water damaged iPhone 6 device. Let's read the article guide!



1. Tear down the iPhone 6 by cell phone opening tools, connect iPhone motherboard to DC power supply
, and then press iPhone power button, the current stuck on 750MA.

2. Use UNI-T UT81C Scope Digital Multimeter to measure each circuit output for iPhone power IC, there is no any short circuits.

3. According to our experience, actually, for this problem, the best way is rosin method.

4. Apply some rosin on the iPhone 6 motherboard, and then use PPD 861D Plus hotair rework station to smoke the iPhone motherboard until it turns white. Supply power and boot it, after a while, do the same thing for several times. Then you will find the short circuit component is hot and discolored.

5. Check iPhone schematic diagram by WUXINJI dongle, we can know that it is C0616, and C0616 corresponds to a 1.8V, which supply power to the iPhoneNAND flash. So, short-circuit 1.8V causes iPhone 6 won't boot.

6. Remove capacitor C0616 with Precision Titanium Alloy Tweezers, supply power and boot it, now the current shows normal, and everything goes well.

7. Some capacitors are not in power, its resistance is normal, but in the case of power-adding, it's going to leak.

More cell phone repair information just read on www.vipfixphone.com

评论

此博客中的热门博文

iPhone 6 Display Failure after Replacing LCD

The iPhone 6 display is black after replacing LCD. After checking, the diode data of display socket is normal and all power supply for iPhone display IC  output is normal. Testing by  DC power supply , we find the iPhone current is abnormal. When press the iPhone power button, the boot current is obviously large. The current reached 100mA when press the power button. After remove the display tube, the current still the same, which means there is a short circuit. Measure the voltage output of each circuit of power supply with Fluke 15B+ Digital Multimeter , then surprised to find that there are really short circuit places. LD010 is short circuit; we suspect that the filter capacitance on the circuit has been penetrated. After remove the iPhone power control IC , we found it is ground short circuit. Open the WUXINJI Dongle  to check the iPhone schematic circuit, we found that this circuit is the display card image transmission MIPI data bus power supply. CPU brea...

Solution: Why iPhone X Voltage Keeps Jumping

After getting the iPhone X motherboard to test, we observe the current value repeatedly jumps between 0mA and 50mA on DC power supply , and it is different from the normal booting current. Next, test whether the power supply of every circuit is normal. PP_VDD_MAIN is measured 4.2V; PP_VDD_BOOST measured is 4.2V. PP1V8-ALWAYS is 1.8V, all the values are normal. But when testing PP1V1_S2, PP0V8_SOC_FIXED_S1, PP1V8_S2 and other circuit voltage that output by power chip U2700 voltage are jumping constantly. According to previous experience, voltage jump is usually caused by a power supply circuit of U2700 output. Measured with digital multimeter , there is no short circuit was found for the dipole value of all power supply to ground. We repaired iPhone 7P before and know that if crystal oscillator is false welding can also cause voltage jumping, And if iPhone CPU  power supply is abnormal also can cause voltage jumping. Check the crystal oscillator we find no problem, then check th...

Iphone 6S Enters DFU Mode Cannot Start Fault Repair

The customer said that he did not know what the reason was. The mobile phone has been restarted indefinitely and can enter the DFU mode. However, when the flashing machine fails to enter the recovery mode from the DFU mode, and then the mobile phone is connected to the computer for 5-10 minutes, it automatically enters the recovery mode. After we received the 6S that could not be started, we disassembled the power with iphone engraving tool and turned on the power to 100mA. First of all, check if you can connect and read the DFU mode after connecting to the computer. Wireless DFU can not exit, we can only brush the machine to view the error. Refresh Aisi and iTunes respectively. If you stuck on the progress bar for a long time, it is very likely that the error is -1. If the progress bar does not enter, you can roughly determine the probability of a CPU failure. Now we need to see if there is a problem with the hard drive. First, use DC power supply for iphone repair, the hard disk o...