What cause iPhone 7/7 Plus reports iTunes error 4013?

We can always hear that iPhone reports iTunes error 4013. This issue is common to the iPhone 6S to iPhone 7 Plus. Today we are going to talk about the iPhone 7/7P stuck on white Apple and then restart; when we use iTunes to flash it, it reports unknow error 4013. What cause this porblem? Vip Pro Shop Team analysis is as follows

Flash iPhone with iTunes and then it reports unknown error 4013 common fault is usually caused by iPhone baseband CPU and 19.2 crystal oscillator.

To find out if the baseband caused the problem, you can replace the new iPhone baseband CPU, and the brush it again, see if iTunes will reports unknown error -1. If it does report an unknown error -1, this indicates that the original baseband damage caused that problem.

To determine whether it is a 19.2M problem, you can directly replace the new 19.2 crystal oscillator, and then use iTunes to brush it again.

Also, if the baseband power supply was damaged, the iPhone will show same issue. 

8 Professional cell phone repair tools you should know

If you are running a cell phone repair shop or you want to start a mobile maintenance business, then you have to have some professional phone repair tools. Today,  Vip Pro Shop Team will share 8 popular professional cell phone repair tools to you.

1. NAVIPLUS PRO3000s

PRO3000 Nand test fixture is designed to repair the blue screen error 9.14.21.40.4013.4014... and repair of 6G red screen error,  iPhone 5S/6/6Plus/Mini2/iPad Air/iPad Air2 HDD REPAIRER, also support 32bit iPhone 4 4S 5 5C / iPad 2 3 4. It can program/reading and rewriting Serial Number, Unlocking kinds of Ipads of Wifi model by changing Serial Number, expending/updating memory of kinds of pads and iPhones.

2. WL PCIE

It is for iPhone 6s 6sP 7 7P 5SE / iPad pro. It can read / write PCIE NAND SN (serial number), Model, region (country), Color, WIFI & Bluetooth. And NAND underlying data restore New NAND with iTunes. It doesn't need boot NAND Disk, can release Wi-Fi limitation from NAND, and added PCB circuit protection and NAND protection, will be light alarm. It's easy to use and more stable.

3. VGA Camera 7-45X Trinocular stereo microscope

It has VGA Video Camera and LED light stereo zoom microscope. Continuous zoom binocular visual 7-90X Trinocular stereo microscope, it is used extensively world medical research and health care, biology and botany research, and agriculture, as well as in electronic component manufacturing. Specially suited for LED, electronic PCB / Phone Logic Board inspection, pressing plating and electronic component inspection.

4. MJ 3D BGA Reballing Stencil template

MJ 3D BGA Reballing Stencil template, iPhone A8 A9 A10 groove Reballing Stencil Template, iphone 6/6 plus, iPhone 6s/6s plus and iPhone 7 /7plus 3D BGA Reballing Stencil template. Stepped groove, easy to use and accuratea lignment.

5. Double Layers Heat-resistant Soldering Mat

Heat Gun BGA Soldering Station Insulation Pad, Anti-static mat for cell phone Repair Maintenance Platform Desk Mat, Environmental-friendly silicone, Anti-Static, Anti-corrosion, Anti-slip, Non-deformation, foldable, suitable for the accommodating of variety of small accessories. This Patience high-temperature Pad can withstand 500 degrees temperature, prolonged use will not be deformed, not smoke, does not emit disgusting smell.

6. JM-P01 Essential Electronics Toolkit

JM-P01 Essential Electronics Toolkit for Mobile Phone Repair, most economical do-everything Phone Repair toolkit, VIPFIX Essential Phone FIX Toolkit is what you need for the standard phone repairs—like LCD screen and Teardown, and everything you need for DIY FIX Phone Teardown. Common used in a precision work in cell phone repair, Opening Pry / phone Repair / Screwdrivers Toolkit  For Mobile Phone, Compatible with iPhone, iPod, iPad, Tablet, Cell Phone, etc.

7. MFC IREWORK Phone Circuit Board Rework Heating Platform

MFC iREWORK rework heating platform Adopt the popular PID automatic, intelligent, high precision control technology. The iREWORK Heating Platform rated by professional technicians in China, MFC team combined with Jovy company and famous GSMHOSTING forum teamed up to build a highly efficient, high-end, intelligent equipment for the maintenance industry, the unique features are mainly: easy operation, safety, intelligence, energy-saving and space-saving. The most common heat transfer applications exist in the rework market like soldering iron & soldering station are using this method.

8. QUICK 861DW Hot Air Rework station

QUICK 861DW Hot Air Rework station is the new Lead Free Rework Station, 861DW Rework Station for Mobile Phone BGA desoldering Repairing, 1000W / 500 °C Genuine original Hot Air Rework station, With CH1, CH2, CH3 three working channels and each channel can be set to the amount of wind, and temperature.

How to fix iPhone 7 WIFI cannot be turn on?

We got an iPhone 7 to repair from customer, the fault is that the iPhone has been dropped, the Bluetooth can be turned on, but the WIFI icon is gray and cannot be opened. When we got the iPhone, we press the iPhone power button, and test the other functions first, all is fine, and the only problem is WIFI cannot be turn on.

After we enter the IOS system, we still cannot see the MAC address of WIFI, as shown in picture 9-5-1.

Not even Wi-Fi addresses like this are basically caused by the iPhone CPU does not recognize the iPhone Wi-Fi chip, the customer said the iPhone has been dropped, we suspect that the chip was damaged or empty solder. Test the Wi-Fi working conditions before removing the chip.

Use multimeter to measure the diode data, no problem found, is it really the Wi-Fi chip that's broken? Now we only can remove it and replace the new one. To replace the iPhone 7 Wi-Fi chip, you need to remove iPhone NAND flash and unlock. Now, we remove the Wi-Fi chip, and then we found that the solder pad of Wi-Fi chip dropped four points, the position of circuit diagram as follows

These pins are on the PCIE bus, and it passes through coupling capacitor to the CPU. Ready to replace the chip, but replacing the chip requires removing the NAND flash, so we’re trying to make up the pins on the chip. Scrape out solder joints, weld the jump wire, and paint the green UV oil, and then plant Tin, welding it with rework station. Well-welded chip as shown in the picture 9-5-3.

                                        

The small pins on the edge of the chip can be used to test whether it is properly welded. After welding, measure the diode data with multimeter, it is normal. Boot it and test it, the failure has been repaired.

Finally, we can see the WIFI address on the phone, which shows the A10 CPU has already identified the chip. The WIFI can be turn on now, as shown in the picture 9-5-7. Test it for a period of time, all is fine, send the iPhone 7 back to the customer.