iPhone screw location diagram map and related screw numbers

How to get the iPhone screw location diagram map and releate screw numbers? Here we can get it.  Here are iPhone screw location map and releate screw numbers for iPhone XS Max, XS, X, 8, 7, 6.

Because the iPhone motherboard is too precise, once a screw was installed incorrectly, it can cause problems for the iPhone, such as the iPhone back cover can't be covered, damage the iPhone screen, or even damage the iPhone motherboard, so we need numbered the iPhone screws and make the iPhone screws location diagram.

As we know that there are 64 to 84 screws on an iPhone, which including 26 to 38 different models. For example, the iPhone XS has 58 screws, in 38 different models, different sizes, length, and screw hole. Therefore, it's very important to know the correct positions of the screws on the iPhone; we have to know exactly where each screw corresponds to the phone, that's why we marked the number for the screws.

We put each screw model will be pack in a separate bags, the users just need to choose the screws by following the iPhone screw location diagram, so you won't use the wrong screws model on the iPhone. And finally, you won't damage the iPhone because of the wrong screw.

And we mark the screws with a physical marking method, classify and number all screw models from iPhone 6 to iPhone XS Max, and make them into a corresponding high-definition screw location diagram.

Finally, you can select the correct numbered screw against the iPhone screw map, so you can install it correctly.

Solved: iPhone XR 4G Network Unstable

Here is an iPhone XR with 4G netowrk problem, 4G signal on the iPhone XR is not stable, it always turns to 2G. How to solve tihs problem?

Use phone opening toosl to disassemble the iPhone XR to remove the iPhone XR motherboard. Observing the iPhone motherboard, we can see that the iPhone baseband part, the medium frequency part and the amplifier IC has been repaired.

Fixed the iPhone XR motherboard by a MJ A22+ PCB fixture, and then remove the iPhone NAND flash. Put it under the Black Trinocular Microscope, use BGA scraper blade to remove the black glue, and then remove the iPhone Nand flash, and then remove the iPhone baseband CPU.

Next we're going to remove the iPhone main CPU. Put iPhone motherboard under a microscope, and then use BGA scraper blade and hot air gun to remove the glue for A12 CPU, and then use medical cotton to clean it. Now use hot air gun to heat the main CPU, after a while, carefully insert a blade, and slide the blade gently to both sides, and then remove the main CPU.

Next we need to remove the logic eeprom IC, as we know, since the iPhone X and later models, the logic eeprom IC is multi-pin, if the logic eeprom IC doesn't been installed, then it will report unknown error 9. Use hot air gun and BGA scraper to remove the logic eeprom IC.

Because the baseband eeprom IC is too small, so we can remove it later. Now we need to install those IC that has been removed previously to the new motherboard.

First install the iPhone Nand flash. Check iPhone Nand flash solder pins, there are 3 solder pins that are grounded, so we can leave them. Remove the glue from the Nand flash, place it to the MJ 3D BGA reballing stencil, apply some solder paste, and then soldering the tin balls on the Nand flash.

After reballing, we need to unbind the WIFI. Use JC PCIE-XR programmer to unbind the WIFI, and then we can install it to the new iPhone motherboard. Apply some solder paste to the solder pad, use DES H95 rework station to install the iPhone XR nand flash to the new motherboard.

Now we need to reballing iPhone basebande CPU and iPhone logic eeprom IC. After reballing, we need to handle the iPhone main CPU. Use hot air gun to solder the tin, clean it, and then reball it.

Install the A12 CPU on the new motherboard. Put main CPU on the right position by tweezers, and then use hot air gun to heat it. When the solder oil overflows, gently push the CPU with a Titanium Alloy Tweezers to see if it is reset, if it can reset, then we can stop heating.

Next install the iPhone logic eeprom IC and iPhone baseband CPU on the new motherboard.

Now we need to remove the iPhone baseband eeprom IC from the old motherboard, and then install it to the new motherboard.

At last, test the iPhone XR 4G network, it's working perfectly.

Here get hardware solution to fix iPhone XS Boot Failure

The iPhone XS can't be turned on after pressing the power button, after testing, we confimed it's caused by hardware problem, now let's get hardware solution to fix the iPhone XS boot failure.

Disassemble the iPhone XS by phone opening tools, connect the iPhone XS to the DC power supply to test the boot current, when press the iPhone power button, the current instantly reaches more than 800mA, and then drops to 0mA immediately.

Remove the iPhone display screen, disconnect the iPhone battery, and then remove the iPhone motherboard.

Use digital multimeter to measure the circuit of the power supply, we found the PP1V1_S2 is short circuited.


Log in to ZXW online account to check iPhone schematic diagram,  we need to measure the capacitors on the PP1V1_S2 circuit. After measurement, we know that those capacitors are normal. Therefore, we suspect the problem is between the iPhone CPU and the iPhone motherboard, the iPhone CPU tin balls may have broken, and then cause the PP1V1_S2 short circuit.

Attach the iPhone XS motherboard upper layer to the SS-601K PCB fixture, apply some solder paste around the iPhone CPU, and then use BGA removal blade and hot air gun to remove the iPhone CPU.

After the iPhone CPU is removed, put iPhone motherboard under the Trinocular microscope, and then use BGA removal blade to remove the glue on the iPhone motherboard.

Next, put MJ 3D BGA reballing stencil on the iPhone CPU; apply some Mechanic solder paste to the BGA reballing stencil, and then use hot air gun to reball it.

After reballing, apply some solder paste on the iPhone motherboard, and then put iPhone CPU on the right position, use DES H95 hot air gun to solder it back the iPhone motherboard.

Now install the iPhone XS, press the power button, the Apple logo appears normally, and then the iPhone XS enters IOS system successfully ,the iPhone XS boot failure has been solved!

iPhone 6 flashlight failure with hardware solution

Here is an iPhone 6 with flashlight failure, after measurement, we confirmed it's the hardware problem, here is a hardware solution to fix the iPhone flashlight problem.

First of all, we need to disassemble the iPhone 6. Use screwdrivers to remove the screws next the iPhone lighting port, put iPhone 6 on the CPB screen separator for heating, turn the iPhone display screen down and connect it to the CPB screen separator. After a while, we can take out the iPhone 6, and then use LCD sucker to open the iPhone screen easily.

Carefully remove the iPhone display screen, disconnect the iPhone battery, and then remove the iPhone motherboard.

Put iPhone motherboard under the microscope to observe, it’s found that there is no iPhone flashlight IC, and the solder pad of the iPhone flashlight IC has lost several pins.

We contacted the owner of the iPhone 6 for more details, and the owner of the iPhone said that this iPhone 6 was repaired by other shop, and they replaced the iPhone flashlight IC, but it didn’t work because the iPhone flashlight IC was burned after a while. So they removed the iPhone flashlight IC and didn’t install it on the motherboard.

There are 8 Pins were lost by counting the missing pins under a microscope. Log in to the ZXW online account and check the iPhone 6 schematic and bitmap, and we can see that for those missed Pins are grounding line, the power supply of the LEDI light, the Pin of the flashlight auto boost Pin.

The iPhone flashlight IC was burned because the iPhone flashlight IC lifted boost Pin lost, the signal is in a suspended state, causing the iPhone flashlight IC to burn after power-on.

Attach the iPhone motherboard to the PCB holder fixture, put it under a microscope, apply some solder paste to the motherboard, and then use QUICK TS1200A hot air gun to solder the missed pins on the solder pad, and then use green UV oil to insulate and cure it.

Now, install an iPhone flashlight IC to the motherboard, and then assemble the iPhone 6.

Press the power button to turn it on, get into IOS, test the flashlight function on the iPhone 6, now iPhone 6 flahslight function works perfecly.

iPhone screen doesn't display - how to fix?

After pressing the iPhone power button, the Apple logo doesn't appear as usual, and the iPhone screen keeps black. What's wrong? Why iPhone screen doesn't display? How to fix?

As we know, the iPhone software problem can cause iPhone black screen problem, meanwhile, the iPhone screen itself problem and iPhone motherboard problem also can cause iPhone black screen failure. Here are some suggestions to fix it.


1. Force restart iPhone

Different iPhone models have difference methods to force restart.

- Force restart iPhone 6S and earlier

Press and hold the iPhone power button and iPhone home button at least 10 seconds, release both buttons when you see Apple logo appears on the screen.

- Force restart iPhone 7 or 7P

Press and hold the iPhone power button and iPhone volume down button at least 10 seconds, release both buttons when you see Apple logo appears on the screen.

- Force restart iPhone 8 / 8P / X

Press then release the iPhone volume up button, immediately press then release the iPhone volume down button, and then press and hold the iPhone side button till you see an Apple logo appears on the screen.

2. Update IOS

Generally, there are 2 ways you can update IOS, one is update it on the iPhone, but in this case, we don't choose it, because the iPhone screen doesn't display, so we have to choose the second way, use iTunes or other third-party software to update iPhone IOS.

- Connect iPhone to the computer by iPhone lightning cable
- Update iTunes to the latest version
- Open iTunes and select your iPhone
- Click Summary, and then click Check for Update.
- Click Download and Update

3. DFU restore iPhone
DFU restore iPhone will erase all settings and data on iPhone, so it can most deeply to fix iPhone software problem.

Before you are going to restore iPhone, you should backup your iPhone.

- Connect iPhone to the computer by iPhone lightning cable
- Update iTunes to the latest version
- Back up iPhone by iTunes
- Put iPhone in DFU mode
- Use iTunes to restore iPhone

After tried above the software solutions, if the iPhone LCD still shows black, then you should check iPhone hardware parts, such as the damaged iPhone display screen or damaged iPhone motherboard.

4. Replace new iPhone display screen

If the iPhone display screen is damaged, you can't fix the black screen problem by software solutions, we can try to fix it by replacing the new iPhone display screen.

- Use phone opening tools to disassemble the iPhone
- Remove the iPhone display screen
- Install the new iPhone display screen
- Power on iPhone and test it

After replacement, if the iPhone screen stills no display, then possible it's the problem of the iPhone motherboard.

5. Repair iPhone motherboard

As we know, the iPhone motherboard is the core part of the iPhone, there are many components, some components can cause iPhone no display problem, such as iPhone flash IC, iPhone backlight IC and so on.

In order to repair find out the faulty part on the iPhone motherboard, we need to disassemble the iPhone, remove the iPhone motherboard, and then use DC power supply or digital multimeter measure the iPhone motherboard to find the faulty part,so that we can fix it.

For replacing iPhone screen and repairing iPhone motherboard, the phone repair skills and phone fix tools are required; if you are not the professional repair man, please don't do the last 2 suggestions by yourself, just contact Apple Care or iPhone repair shop.

iPhone 6S rear camera failure with PCB repairing solution

Here is an iPhone 6S with rear camera failure problem, this iPhone rear camera is damaged by water, so we need to check iPhone hardware aspect to fix it. Here we can get an PCB repairing solution. 

 

1. Disassemble the iPhone 6S.

Use screwdrivers to remove the screws at the bottom of the screen, and then put iPhone screen on the CPB screen separator for heating. After heating a while, we can use LCD sucker to open the iPhone screen.

2. Replace the iPhone rear camera. 

Remove the iPhone display screen, becuase it's the iPhone camera problem, so we try to fix it by replacing the new iPhone camera.

Remove the iPhone rear camera, and then install a new camera.  Assemble the iPhone 6S, and test the camera function, unfortunately, the iPhone 6S rear camera still doesn't work.

3. Remove the iPhone motherboard

So is it the iPhone motherboard problem? we need to remove the iPhone motherboard to check it.

Use phone opening tools to disassemble the iPhone 6S, remove the iPhone display assembly, disconnect the iPhone battery, and then remove the iPhone motherboard.

4. Repair the iPhone motherboard.

Put iPhone motherboard under the microscope to observe, we found the power supply 2.85V tube of iPhone rear camera has been burned, use tweezers to remove the 2.85V tube directly

Login to the ZXW online account to check iPhone schematic diagram,  we know that this IC is converted from the main power supply VCC_MAIN to 2.85V for iPhone rear camera

After removing this chip, we found the main power supply pin has been burned Because this IC is too small, it's difficult to replace, and soldering a jumper wire by QUICK 861DW hot air rework station also is not good, so we are going to borrow 3V voltage.

As we know, there is a 3V test point on the iPhone motherboard, use digital multimeter to measure it, so we can find out this 3V test point.

Soldering a jumper wire from the 3V test point by QUICK TS1200A, apply some green UV oil on it.

5. Assemble the iPhone and test it.

Assemble the iPhone 6S, press the power button, it's turned on smoothly. After entering the IOS system, test the camera function, now the iPhone rear camera is working properly. The repairs ended!

how to fix iPhone 7 Plus fast consumption failure

An iPhone 7 Plus with fast consumption failure, what causes the iPhone battery to consume so fast? Actually, iPhone fast consumption is common problem, the iPhone setting , the iPhone IOS system , the Apps , the iPhone battery , the iPhone motherboard all can cause this failure, so how to fix it?

1. Make Sure The Auto Brightness Is On

For the iPhone display screen, we can adjust the brightness in the system. Someone like to keep their iPhone display always on, but continuous screen brightness consumes a lot of battery power, we can use Auto Brightness function to avoid this case.

In order to make turn on the auto brightness, please go to Settings -> General -> Accessibility -> Display Accommodations. And you can go to Settings-> Display & Brightness to set the time for Auto-Lock.

2. Disable Some Notifications

When you download the new App, they will prompt you that allow notification or not, and you will choose allow it. However, for many Apps, the notification are not necessary，because the notification will consume the power of the iPhone battery.

In order to disable the notification for App, please go to Settings-> Notifications, check NOTIFICATION STYLE, and then tap the App you want to disable the notification, and then turn the button to the left side on Allow Notifications.

3. Turn On Low Power Mode

Low Power Mode will reduce display brightness, optimizes device performance, and minimizes system animations. Low Power mode automatically turns off when your device hits 80 percent charged. After you turn on low Power mode, when your iPhone battery charge is below 20%, it pauses background application refreshes and automatic downloads, so it can maintain the basic functions of the iPhone 7 Plus.

Turn on the lower power mode on iPhone 7 Plus, please go to Settings > Battery, and then tap Low Power Mode.

4. Disable Some Location Service

Most of Apps has location services, and but not all location service are needed. As we know, there are two options for location service on App, one is Never, and the other one is While Using the App. For some App, we can choose never, because the location service will constantly drain your iPhone battery.

In order to disable some location service on App, please go to Settings -> Privacy -> Location Services, tap the Apps that you want to disable the location service, and then choose Never.

5. Other solutions:

- Check iPhone battery

If the iPhone 7 Plus has been used for a long time, then there could be a problem with the iPhone battery. We can use iPhone battery tester to test the working status of the iPhone battery, if the working status tested are not good, then we should try to replace the new iPhone battery.

- Check iPhone motherboard

If there is a problem with the iPhone motherboard, then it also will cause the iPhone battery consumption problem. We can disassemble the iPhone to measure the iPhone 7 Plus motherboard.