Your Guide to Local iPhone Repair Services

The iPhone 6 plus was fell into before, it has been replace two WIFI chip , but both failed, WIFI still cannot turn on,  then measured the relevant work conditions of the WIFI circuit, there is nothing wrong.  The fault interface of WIFI as shown in picture    4-8-1 . The customer has changed two WIFI chips, and has measured the main working conditions: WIFI two power supply, WIFI-32K clock. So we enter into the first step of repairs directly: Measuring the WIFI circuit of PCIE communication bus, we find the 2 pin of capacitor C0704 to CPU ground value is low, the actual measured value is 221, normal motherboard  resistance is 560. Thus, we can judge the problem is from CPU . As shown in picture 4-8-2 The position of the capacitor C0704 is shown in picture 4-8-3 According to the maintenance experience we can judge like this: Generally if the ground value is small, and at the same time it's leading to CPU, It is unable to repair, but w...

The use time of cell phone battery is a factor that consumers buy mobile phone.  However,  we got a complain from our customer which about the  battery  issue of iPhone 6 Plus,  the iPhone 6 Plus battery drains quickly, this is bad for the use of  iPhone.   Vip Pro Shop Team  provided a repair guide for this issue. Repair Steps 1. Connect iPhone 6 Plus to  DC power supply ,  and then press iPhone 6 Plus power button, the current shows 100 Ma, the current jumps to 200-300 Ma for instant booting moment, it can be normal turned on and off, but the device body is very hot. 2. Press the  power button  to boot for entering system, w e found that the compass in the iPhone 6 Plus can not be opened. 3. Remove the  motherboard  to measure,  we found that the compass 3V  power supply  PP3V0-IMU is short circuit to ground, PP3V0_IMU in the  schematic diagram  as shown in picture  4-6-...

As we all know,  keep your iPhone far away from the water, however,  there's always an accident. Yesterday, my iPhone 6 fell into water, and then  there is leakage when connecting it to DC power supply , which triggers large current. We need to fix it. The iPhone 6 motherboard  waterproof stickers changes into red, indicating that the motherboard got into the water, the power supply shows leakage 31mA when electricity is connected. As shown in picture 4-4-1 . Short start signal boot, current jumps into 223mA as shown in picture 4-4-2 . This kind of fault is usually caused by chip damage after water inlet, measuring each power supply is normal value, measuring the datacable  of the 12C0 bus to the ground value is only 002, indicating that the 12C0 is short-circuit to the ground, the normal value should be about 400. As shown in picture 4-4-3. Combining the above phenomenon, the fault target is locked in the U1602 flash power...

Trouble phenomenon There is no sound during the call when it turn on speaker, but it has microphone, and it frequently no service.  Troubleshoot First, recording with voice function, and the earpiece has sound, so we can concluded that the circuit from audio  to earpiece is fine which can exclude the problem of audio. Then the problem maybe is signal of baseband CPU  sends to audio. Check the motherboard, we can find that the baseband CPU and the IMEI was repaired, probably the problem is on the baseband CPU. Remove the baseband CPU with hot air gun , we can find that there are many pins was lost, as shown in picture 4-3-1. Because there are many pins lost, so possibly the iPhone 6 dropped before. Check it more carefully, there are two useful pins was lost. Put motherboard under the microscope , use jump wire to solder U1 pin V1 pin, and painted with UV Solder Resist Mask , then install baseband CPU. Power on the iPhone and show no service...

Trouble phenomenon The screw  on motherboard is snapped, after fix it, then the touch function not working. Repair steps 1.  Power on iPhone 6 and test it, the touch screen has no response and there is no white stripes. In this situation, the generally black touch IC  does not work or CPU can't recognize the touch IC. According the trouble phenomenon there could be disconnect. After disassemble the iPhone 6, we can find that the iPhone has been repaired, and it's more serious. As shown in picture 4-1-2 and 4-1-3. 2.  Use digitaloscilloscope  to measure touch IC, it shows 5.1V, 5.7V, and also has the voltage of black touch ic. This result indicates that both the white and black touch IC all is working, probably it's a sync signal problem, check it with schematic diagram. As shown in picture 4-1-4, 4-1-5, 4-1-6 and 4-1-7. 3.  From display interface to backlight test point and CPU , and then to black touch ic and synch...

Recently, we got the iPhone 6 from our customer, because the iPhone 6 has no display after it is powered on, the trouble is that  the screw column is twisted through.  Now, we have some tips for repair it. Tips After openning device, we find BS2503 screw has already been disassembled. Blow off, the BS2502 screw has traces of being damaged. As shown in picture 1 and 2. We find 14 base AP_TO_LCM_RESET_CONN_L shows infinite data when measuring the reststance of J2019 base. As shown in picture 3. CPU reset signal on the screen is to go under the BS2502 screw column, scraping the screw column to measure, we find it's broken on the edge, which and can only be solved by jumper wire. As shown in picture 4. After soldering the jumper wire  and install screen to test, we can see backlight but no display, the measurement shows no voltage on the both positive and negative 5.7V of the display. Here we move into the measurement when it is power...

where to bought right iphone 8 Opening Tools ,  It is important to select the best iphone repair tools when you intend to repair new iPhone 8. When you choose the cheap or inexpensive tools and equipment, may not be handy when repairing a mobile phone. On the other hand, best quality little expensive tools and equipment will help you to repair a mobile phone easily and comfortable. According to professional experience that we must always select and buy the best tools available in the market or online. These  phone repair tools  may cost a little more but in the long term you will be happy that you bought the best tools. I will introduce several iPhone 8 maintenance tools. Screwdriver for Matches iPhone Model: It is hugely important to select the best disassembly tools for professional maintenance technician. When you choosing right tools and equipment to fix iPhone, you need select the right tools, because it is not only makes the job quicker, but also makes safer repair ...

After the iPhone 6 Plus fell, it have some problem, it always restarts itself. When we root it, it shows unknown error 9. If you want fix it, and then you can follow the following steps to repair it. 1.  Disassemble the iPhone 6 Plus, remove the CPU. Because if dropped iPhone reports unknown error (9), mostly the CPU pins connected with logic board are missing. Measure U16X eeprom chip , finding it is pseudo soldering.  Solder CPU and jump wires, as shown in picture 7-36. 2. Get into IOS and test it, the screen is blurred sometimes. Check display circuit and we find that display power supply PP5V7_LCM_AVDDH near display screen FPC socket  is abnormal. PP5V7_LCM_AVDDH is output by chipU1501 , as shown in picture 7-37. At U1501’s peripheral capacitor C1569, I measure its output voltage. The voltage is normal. The location of C1569 on motherboard is shown in picture 7-38. We can't find any voltage at C2071. U 1501 outputs PP5V7_LCM_AVDDH and transmi...

In the field of iPhone repairing, if the iPhone 6 Plus reboot repeatedly, this time you should consider fixing the unknown error 9. Use iTunes to root it, it shows unknown error 9, most of this is caused by the CPU and NAND flash . What exactly is it? We need to test it to determine the real problem. Test the R3017 and R3016, (they are positioned in the   bitmap   as follows 3-2-1 and 3-2-2) Normally both of them should be 480. If one or two of them shows 700, then the CPU must broke. After testing, we can found that the AR31 of CPU was disconnected. Remove the CPU, and them we found that the motherboard  leaking copper. Please don't worry, we can handle it. Use solder iron and solder flux to solder it. Clean the remaining glue on the solder pad. Pre-heat the motherboard with hot air gun , and then remove the glue with solder iron . In this part, you should do it more carefully, the best way is put solder pad under the microscope, so that you can s...