Tag: phone repair

iPhone X Aftermarket OLED Screens Comprehensive Guide
Here comes iPhone X Aftermarket OLED Screen! With iPhone X Aftermarket LCD Screen springing up in the market, much attention had been paid to iPhone X Aftermarket OLED Screen.

We got samples of iPhone X Aftermarket OLED Screen from the factory at the first sign of production and carried out a series of tests afterwards.

The Aftermarket OLED Screen performed well with no function problem, which has met the product standards of usage.

Now, let’s take a close look at iPhone X Aftermarket OLED Screen with test results.

The IC on iPhone X Aftermarket OLED Screen and OEM Screen get high similarity.

iPhone X Aftermarket OLED Screen and OEM Screen also share the same textures on LCD flex cable.

Aftermarket OLED Screen and Aftermarket LCD screen feature with the same textures on Touch flex cable.

Aftermarket OLED Screen and Aftermarket LCD screen also share the same 3D Touch flex cable.

Check the thickness of iPhone X OEM Screen, iPhone X Aftermarket OLED Screen and iPhone X LCD Screen.

Since the 3D touch module of iPhone X Aftermarket OLED Screen is thinner, it will be slightly thinner when measuring, Yet the bezel much thicker than iPhone X OEM Screen, so it will little higher after installation.

Besides, iPhone X Aftermarket OLED Screen features with four golden contacts which is highly similar to those on iPhone X OEM Screen.

Function Test

Since the LCD panel of iPhone X Aftermarket OLED Screen and OEM Screen share the same production process, the vertical line issue due to bonding procedure can also be frequently seen with our test samples.

Still, these imperfect screens can be screened out in subsequent quality inspection.

Also, because of the vertical line issue, there is no brightness test in our video today.

First, run touch function test, the phone performs with normal touch function.

Yet the screen is not running smoothly because of glass lens material.

We believe that this will be improved when it comes to full production.

Continue to run 3D Touch function test, the phone performs with normal 3D Touch function.

Run the multi-touch test in game mode, the phone performs normally.

Conclusion

Within a few days of trying out the iPhone X with Aftermarket OLED Screen, our technicians carried out a series of tests under the condition of excluding the impact of the vertical issue.

The Aftermarket OLED Screen of iPhone X performed well with no function problem, which has met the product standards of usage.

Please stay tuned and we will pay close attention to the product in the future.

For more iPhone X Aftermarket OLED Screen test details please view our Youtube video here:

REWA cell phone repair replacement parts:
May 31, 2018
Expert Tips for Troubleshooting iPhone 8 Plus Black Screen
iPhone 8 Plus turns on with black screen. What will you start with?

For screen issues, the most common solution is to replace with a new display assembly to see whether it’s a screen problem or a board issue.

As for black screen issues, we can also start with the boot current.

Run boot current measurement first.

If the boot current is normal, then we can confirm that the phone is turning on with no display.

As for display issues, find the display connector at the very beginning.

Related post: Samsung Galaxy S6 edge+ Turns On With Black Screen

Sounds quite simple? Well, follow our repair guide and you can figure it out by yourself.

Problem

Press power button to power on. There is no response from the phone.

Disassemble the phone and disconnect the battery.

Connect the battery connector with DC Power Supply and press power button to power on.

Current reading on the ammeter is normal.

Which indicates that the phone is turning on, yet with black screen.

Diagnosis

Since J5700 is the LCD/touchscreen connector of the logic board, we need to run diode mode measurement of J5700 first.

The measured value of Pin 39 and Pin 45 on J5700 is 0. Judging by this, the fault is related to relevant circuit of the two pins.

Refer to Refox – the maintenance drawing and we can see that the two circuits are parts of the screen backlight circuit.

Now we need to run further measurement of the two circuits. We can start with R5730 and R5733.

The two are Zero Ohm “resistors” that usually act as protective roles on the circuit.

R5730 and R5733 are located under the shielding cover.

For better operating, we have to tear off the shielding paste and remove shielding bracket with Cutting Nipper first.

Attach the logic board to PCB Holder and run diode mode measurement of R5733 and R5730.

The measured value of Pin 1 on R5733 is normal and there is no measured value of Pin 2 on R5733, which is abnormal.

The measured value of Pin 1 on R5730 is normal and there is no measured value of Pin 2 on R5730, which is also abnormal.

Judging by this, R5733 and R5730 have been damaged and we need to replace with new resistors.

Tips

As R5733 and R5730 are Zero Ohm “resistors”, we can simply replace with new resistors or replace with ferrite bead inductors.

Troubleshooting

Detach R5733 and R5730 from the board with Hot Air Gun.

Apply some BGA Paste Flux to the bonding pad. Then apply mid-temperature solder to the bonding pad with Soldering Iron. Once done, clean the bonding pad with PCB Cleaner.

Then apply some BGA Paste Flux to the bonding pad and align the two inductors to the right place. Solder with Hot Air Gun.

Once finished, wait for the logic board to cool for 5 minutes. And then clean thoroughly with PCB Cleaner.

Reassemble And Test

Get the logic board mounted first. Then run diode mode measurement of Pin 39 and Pin 45 on J5700.

The measured value is normal this time. Continue to buckle the display assembly and connect the battery. Press power button to power on.

The phone turns on with normal display. Run function test. All going well.

Tools & Parts Needed
You can also visit REWA YouTube Channel to check our video and learn how to fix iPhone 8 plus black screen issue.
May 30, 2018
iPhone X Won’t Turn On? Fix It with Logic Board Repair
When your iPhone won’t turn on, what can you do?

The first step is to find the reason of iPhone won’t turn on, there could be any hardware or software issue related to your device.

Such as physically damaged or dropped in water or some other reason, and there are many solutions form internet, such as charge your iPhone, restart, Hard restart, use software to fix… for these solutions, you can have a try, but here we will provide a high level and professional solution to fix iPhone won’t turn on.

iPhone X, with its super-sized display, latest biometric technology – Face ID, most durable glass, wireless charging and so on, hits the heart of the majority upon its release in October 2017.

However perfect it is, it shows malfunctions as time goes by.

In the beginning, it has malfunctions of unresponsive touch, stuck screen, and other display issues. Lately, some logic board malfunctions show up. For example, iPhone X won’t turn on etc,.

If you get to know the structure of iPhone X logic board, you should know iPhone X logic board was folded in half, and the two layers then were soldered together – the upper layer is the main board, and the lower layer is the signal board.

Which made our repair much difficult to proceed.

Today, we share a repair case of iPhone X won’t turn on logic board repair. Let’s see which is the hardest part.

Disassemble

Disassemble the won’t turn on iPhone X. Take out the double layer motherboard.

Here comes the first difficulty – separate the folded motherboard. which requires severely temperature controlling.

Excessively high temperature would damage the components around, but too low temperature cannot separate them. With patience and time, we separate the logic board successfully.

Diagnosis

After the logic board was separated, connect the upper layer with DC Power Supply.

The reading current is abnormal. So we locate the fault to the upper layer.

To continue our diagnosis, we measure power supply voltage of the upper layer with Multimeter.

And find out there is no voltage value on C2771 and C2770.

Measure with Multimeter and we can confirm that the inductor L2770 is damaged.

Maintenance & Test

So we need to take down inductor L2770 and replace with a new inductor.

Firstly, attach the upper layer to the PCB Holder.

And stick High-Temperature Adhesive Tape on components around L2770 for protection.

Then re-solder with a new inductor.

After cooling down, measure the current value again via connect it with DC Power Supply.

The measured current value on the ammeter is normal this time. Fault cleared.

Reassemble

Guess what? Here comes the most difficult part of the repair – to remove tins from the two layers separately.

We transfer the direction for 5 times and finally finish the tin removing process.

Then another difficult part – to reball the lower layer.

We actually made it only at our second attempt.

Eventually, we got re-solder the two boards and reassemble the phone, the iPhone X won’t turn on the issue was finally solved.

Please refer to the video for more details.

Tool List:
April 18, 2018
Troubleshooting iPhone 7 Won’t Turn On

What should you do if your iPhone 7 won’t turn on after being dropped?

The problem may be caused by a software crash or a complicated hardware issue.

We have published an iPhone 6 won’t turn on and iPhone X won’t turn on guide video, and this time, we received an dropped iPhone 7 Plus which cannot turn on.

The problem was finally detected as CPU being short-circuited. Here we have detailed troubleshooting procedures.

iPhone 7 won’t turn on Diagnosis

Take apart the phone and disconnect the battery, then connect the phone with the DC Power Supply and press the power button to power on.

The current reading of the ammeter jumps to 350mA and then stays still, which is abnormal and indicates that the logic board is short-circuited.

disassemble the phone and detach the battery

Disconnect the power supply and take out the logic board.

Run diode measurements on capacitors around power IC one by one.

All the values are normal except C1823 – It displays 0, which indicates that C1823 is short-circuited.

From the schematics, we can see that C1823 is the filter capacitor of PP1V8-SDRAM, and it is directly connected to CPU SDRAM.

diode measurements on capacitors around power IC Repair

Attach the logic board to the PCB Holder, and take down the shielding cover by heating with Hot Air Gun, then remove CPU SDRAM with CNC Chip Grinding Machine.

After chip grinding, attach the logic board to the PCB Holder and clean it with PCB Cleaner, then remove the black adhesive around with Sculpture Knife.

After that, apply some BGA Paste Flux to the bonding pad.

Align the new SDRAM to the right place(Don’t reverse the direction), and then solder with Hot Air Gun. After cooling for 5 minutes, clean thoroughly with PCB Cleaner.

CPU SDRAM chip grinding Testing

Connect the phone with the DC Power Supply, then short Pin 13 of J4504 to the ground with the tweezer to trigger the power on the system.

This time, the current reading on the ammeter is normal.

connect the phone with the DC Power Supply

Get the logic board assembled and buckle the display assembly.

Connect the phone to the computer, then press and hold volume down and power button to get into DFU mode. Restore the phone via iTunes.

Once done, insert the SIM card and activate the phone.

After testing, All the functions work normally.

current reading on the ammeter

For more details about iPhone 7 won’t turn on repair and iPhone repair videos, please check our YouTube video.

Need cell phone repair replacement parts or tools?

REWA offers wholesale and retail mobile phone repair parts/tools with affordable prices for 10 years. Welcome to check our online store shop.rewa.tech.

March 21, 2018
Affordable iPhone 8 Back Glass Repair- Expert Tips

Have you checked our newly released about cracked iPhone 7 screen repair tutorial?

It is worth to take a look. Compare to iPhone 7, iPhone 8 and iPhone X look gorgeous, but also make them vulnerable, especially the back glass.

The fragile back glass is long reported extremely difficult to repair and may cost you more than expected due to the new design with wireless charging, embed camera and stubborn glue.

Have no idea about how to start your repair?

Don’t be frustrated. After the iPhone X OLED screen glass-only repair guide ,REWA here rolls out a new and quick solution for iPhone 8 and iPhone X back glass repair .

iPhone 8 broken back glass

Damaged Back Glass iPhone 8 back glass is damaged but still comes with normal wireless charging.

iPhone 8 wireless charging

DisassemblingTake down the display assembly.

Remove the screws, rear camera, logic board, louder speaker and taptic engine, then take out the battery and disconnect the charging port flex cable.

Remove the wireless charging coil by heating with Hot Air Gun , and disconnect the power switch volume flex cable.

Disassemble the iPhone 8

Back Glass Repairing

Pour adequate dispergator into the container of Ultrasonic Cleaner, then soak the back glass in the container and get the lid on. Set the time of the Ultrasonic Cleaner at 30m , and temperature at 60℃ .

After 30 minutes, take out the glass back.

Separate the broken back glass from the middle frame with Pry Sheet.

In case the broken glasses hurt your hands, please clean the table and be careful during the separating process.

Remove the glue residue on the middle frame with Razor Blade and clean it with N-hexane.

So far back glass separating completed without any injuries on the sides.

Apply some glue to the middle frame and spread it evenly.

After that, align the rear camera to the right position, then apply pressure and attach the back glass to middle frame tightly.

Once done, clean the glue residue.

Apply glue on the middle frame

ssemble the phone and test, and the phone runs normally with wireless charging.

For more details about iPhone 8/X Back Glass Repair, please check our video guide.

Now you can order Tools & Parts used in this video on our online shop.

Any questions about these replacement parts/tools, or need assistance when placing your order, please contact us at sales@rewatechnology.com and we will help you ASAP.

January 31, 2018
iPhone Frozen Screen Issue – Logic Board Repair Solution

Some users complained about the iPhone frozen issue of their iPhone 7 after dropped.

Even reinstallation couldn’t help with the iPhone frozen problem once and for all.

The malfunction was caused by the iPhone 7 production process, which could be fixed by maintaining audio circuits.

REWA offers a new iPhone frozen solution regarding logic board repair!

Fix The iPhone Frozen Screen Issue With Logic board Repair Solution

Power on, the screen is stuck off and power button responses slowly.

Disassemble the phone, detach the display assembly. Replace with a new display assembly.

Turn on the phone and test. The screen is still stuck off.

Enter into record mode, the record icon is in nonfunction state.

Screen replacing doesn’t help on the stuck issue, we can tell that there is a problem with the audio circuit. Move on to logic board repairing.

Take out the logic board and tear off the shield sticker.

Apply some BGA paste flux around the audio IC and blow it with hot air gun at 300 degrees.

Then take down the audio IC.

Dip some rosin with soldering iron to clean the tins.

Then dip some rosin with Goot wick for secondary cleaning. After that, clean again with PCB cleaner.

Test resistance value of pin C12 (U3101 audio IC). The resistance value is swinging.

Roll out the maintenance drawing for reference.

Locate the signal of pin C12: 12S-AP-TO-CODEC-MCLK. The signal was connected with CPU via resistor R1103.

Scrape the insulation varnish off the copper wire connecting pin C12 and resistor R1103. Solder tins and then solder the 0.02mm copper wire.

Apply some UV curable solder mast to the soldered copper wire and put the logic board under the UV dryer lamp for 15 minutes.

Reball the audio IC with BGA reballing stencil.

Apply some BGA paste flux to the bonding pad.

Then align the audio IC to the right place and blow it with a hot air gun at 280 degrees.

Once the logic board is cooling enough, clean it with PCB cleaner.

Assemble the phone and test.

Touch function and record function back to normal.

For more details on iPhone Frozen Screen Repair guide.

September 13, 2017
Decoding iPhone Error Codes: Understanding Their Meaning
Encountering error codes on your iPhone or iTunes during updates, restores, or downgrades can be frustrating. These codes pop up unexpectedly, indicating that something has gone awry. With numerous error codes, it’s often challenging to discern the real issue quickly.

Common iPhone and iTunes Error Codes:
- 1, 3, 10, 11, 12, 13, 14, 16, 20, 21, 23, 26, 27, 28, 29, 34, 35, 36, 37, 40, 1000, 1002, 1004, 1011, 1012, 1014, 1667, or 1669
Hardware Glitches: Unknown hardware errors on either the iPhone or the computer can disrupt their connection, leading to errors like 2, 4, 6, 9, 1000, 1611, 9006, 9807, or 9844.

Security Software Snags: Third-party security software, not from Apple, may interfere with iTunes, causing errors 13, 14, 1600, 1601, 1602, 1603, 1604, 1611, 1643–1650, 2000, 2001, 2002, 2005, 2006, 2009, 4005, 4013, 4014, 4016.

USB Connection Woes: Errors like 17, 1004, 1013, 1638, 3014, 3194, 3000, 3002, 3004, 3013, 3014, 3015, 3194, or 3200 often signal a USB connection problem, often due to a loose cable or faulty USB hub.

Networking and Communication Hiccups: Communication problems between iTunes and Apple’s update server can result in errors like 9, 4005, 4013, 4014. They may occur during firmware downloads or server connections for restores.

Other Noteworthy Error Codes:
- Error 11/16: Incompatible library files.
- Error 53: Security test failure; non-official components detected.
- Error 54: Locked file on computer or iOS device.
- Error 1015: Outdated or beta software issues (e.g., jailbroken software).
Additional Jailbreak-Related Errors:
- 1600, 1601, 1602, 1603, 1604, 1611: Jailbroken device issues.
- Error 1671: iTunes is downloading necessary software.
- 4014, 4016, 3194, 3004, 3194: No server response.
For solutions to these errors and more, visit our ASK FORUMS. Simplify the troubleshooting process and make your iPhone experience smoother!
August 4, 2017
6 Essential Tips for Enhancing iPhone Security

It is not a surprising thing that ordinary people, like most of us, prefer convenience over security. Especially when it comes to our daily used iPhones.

Sure, we are not celebrities who have lots of things to hide from the public.

But still, there is a risk that someday someone might want access to other people’s digital life.

Thieves, for example, can be an animated example to violate the privacy and security of ordinary people by breaking in their iPhone.

So, what can we do to avoid the violation of iPhone security?

Here are some REWA tips to help to increase the iPhone security!

Passcode & Touch ID

The first but also most important security setting to enable is the passcode.

If you already have one, then try to improve it with a 6-digit or alphanumeric code.

Go to Settings>Touch ID & Passcode, choose Change Passcode. (First, you’ll have to enter in your current one.)

Then tap Passcode Options and choose Custom Alphanumeric Code to set your new, more complex passcode.

As for touch ID, some users might set up Touch ID so that they can unlock the iPhone quickly and easily using their fingerprint.

Yet the touch ID also adds a layer of iPhone security by allowing users to use a fingerprint scan in lieu of typing in their passcode.

Simply go to Settings and tap on Touch ID & Passcode to set it up.

Home Screen Features

One more assignment with Touch ID & Passcode. Go to Settings > Touch ID & Passcode, and scroll down to see your lock screen access.

Items here can truly reveal a lot of things and the fewer that are on, the better.

Turn off as many features as you’d like under the Allow Access When Locked section.

Once turned off, you won’t be able to access these features until you unlock your iPhone.Location Protection

Your iPhone can track you wherever you go – Go to Settings>Privacy>Location Services>System Services and figure out which of Apple’s system services are tracking your location.

Disable the ones you don’t use. And for senior privacy purpose, you can also turn the feature off in Settings>Privacy>Location Services>System Services>Frequent Locations.Control Center

Control Center can be really convenient for your operation with unlocking.

But it also lets a thief turn on Airplane Mode, disable the GPS as well as cellular and WiFi.

In this way, the iPhone they have just stole cannot be tracked.

Go to Settings and select Control Center. From there, disable Access on Lock Screen.

Erase data

With the Touch ID & Passcode category, there is a built-in security setting many people don’t know.

At the bottom of the Settings>Touch ID & Passcode screen, you’ll find the Erase Data toggle. Enable it and all data on your iPhone will be erased after 10 failed passcode attempts.

Well, don’t be anxious, back up through iCloud and you should be able to retrieve most of it later on.

Two-Factor Authentication

For iPhone security layer, you have a passcode, and you have touch id.

The sad thing is that Apple doesn’t allow you to use both passcode and Touch ID for added iPhone security. That’s when we put up with two-factor authentication.

Which means that when you enter your Apple ID and password for the first time on a new device, there are two steps waiting for you.

Enter your regular password at the beginning.

Then you will have to verify your identity with a six-digit verification code using one of your other devices. You can manage this on your Apple ID account page.

Of course, there are other iPhone security settings waiting for us to dig out.

Do you have any iPhone security suggestions to share? Please leave comments below.

June 28, 2017
Improve iPhone Standby Time: Ultimate Tips for Professionals
iPhone Standby Time refers to the accumulation of all powered on time since its last full charge.

Whether iPhone is actively being used, running with the screen off or sleeping, this time counts towards the standby category.

Generally speaking, the iPhone standby time is calculated based on the capacity of the battery versus the draw of the system since its lasts full charge.

Which also means that within the same battery capacity, the lower the power consumption is, the longer the standby time will be. And vice versa.

Here are some REWA tips to improve the iPhone standby time.

Tip 1 Stop Shutting Apps Down

Apple Store Genius Scotty Loveless explains that when you close an App, you take it out of RAM. You think you did the right thing, but it’s not.

The next time you open the same App again, the iPhone has to load it back into memory. “All of that loading and unloading puts more stress on your device than just leaving it alone,” he writes.

The fact is that Apps “running” in the background usually aren’t really running—they’re frozen, waiting for you to fire them up again.

Still, there are also exceptions.

Once you have enabled Background App Refresh, some Apps that are designed to do things in the background, like navigation Apps or email Apps, are also running in the background.

To get Apps’ problem done effectively, you can turn off notifications, location service and background refreshing to prevent applications from burning battery in the background.

Tip 2 Turn On Low Power Mode

Low Power Mode is to reduce overall power requirements and makes the battery last longer.

Apple even claims that the low power mode will allow you to gain three extra hours of battery life from your iPhone.

Below is what ”Apple’s documentation on Low Power Mode” writes about.

Low Power Mode reduces or affects these features: Email fetch “Hey Siri” Background app refresh Automatic downloads Some visual effects Auto-Lock (defaults to 30 seconds)

Tip 3 Check The Battery Status

If the iPhone battery is in normal status and the iPhone power is simply not enough, then the problem can be fixed with an external battery pack or battery protection cover.

Or the problem may be that the iPhone’s battery is coming to the end of its life.

A quick way to check whether there really is a problem with the battery in your iPhone is to head over to Settings > General > Battery and wait for your Battery Usage report to load up.

The usage time and standby time can indicate whether there is a battery drain problem. If something goes wrong, well, just repair or replace the battery with a new one.

Tip 4 Turn On Airplane Mode When Needed

One of the biggest drains of battery life is the antenna. Since it’s constantly checking for nearby cellular and Wi-Fi networks.

If there is no need to access data, make or receive calls, open GPS, then just put the phone into flight mode and stop all use of the iPhone’s antenna.

What’s more, Wi-Fi connection can also work with Airplane Mode.

Tip 5 Some Other Settings

Here are some other iPhone settings to save the iPhone standby time.
- 1. Reduce screen brightness
- 2. Turn off automatic downloads, iCloud and auto time zone
- 3. Disable Bluetooth & Wi-Fi
- 4. Turn off AirDrop, Fitness Tracking, Hey Siri and Spotlight
- 5. Set the Auto Lock
- 6. Disable 3G, 4G
- 7. Turn down volume
- 8. Stop vibrating
- 9. Tone down visual effects
- 10. Stop push email and remove multiple email accounts.
June 7, 2017
Essential Tools for Professional iPhone Repair Shops

So you want to start an iPhone repair business?

Whether you repair phones locally, online, for friends, family, or for profit, there are some essential tools you need for the job.

Here are some essential tools that REWA highly recommends.

Disassembling Tools

Screwdriver Set: Screwdrivers are of many types.

Mainly used for iPhone repairs are listed as 0.8mm pentagon, 1.5mm Phillips screwdriver, 2.5mm cross-shaped medium plate screwdriver, 2.5mm medium plate socket screwdriver, and 0.6mm Y tri-point screwdriver.

Tweezers: Tools for holding and manipulating small and delicate components.

LCD Opening Pliers: This ingenious tool makes quick work for phone dismantling.

Suction Cup: To assure the safety of the touch screen when dismantling the phone, a professional vacuum suction cup with extra strength is needed.

Plastic Pry Bar: Mainly used to pry up flex cables when dismantling the phone.

Screwdriver Magnetizer/Demagnetizer: Easily magnetize or demagnetize screwdrivers.

Screw Memory Board: Organizes and magnetically secures all your screws while you work on the device.

Sculpture Knife: Used to pry up chips and scrape off glue residue.

Brush: Used to remove and clean any dirt or dust inside the phone or on the PCB.

Repairing Materials

Rosin: High-purity rosin soldering flux for soldering work.

Solder Wick: a braided copper wire helps to remove solder from circuit boards and other electrical components.

UV-Curable Solder Mask: Used in electronic components insulation and welding protection.

Solder Wire: A solder wire is used for soldering components.

Solder Paste: Used for the soldering process.

Jumper Wire: It is a copper wire that is used for making jumpers from one point to another if a track is open (broken).

Aluminum Foil Paster: Used for heat protection when removing chips.

PCB Cleaner: Used for PCB cleaning.

BGA Paste Flux: It is used for heating and removal of ICs. It is applied on the edges of the IC when heating and removing them.

Miscellaneous Tools

Maintenance Platform: One integrated aluminum alloy pad maintenance platform with suppliers and tools placing slots for mobile phone repair. Combined with microscope fixed base.

Hot Air Gun: Used for heating and replacing ICs (Chips) on the logic board. It is also used for removing or mounting soldered parts and components on the PCB.

Soldering Iron: A soldering iron is used for soldering and de-soldering the parts and components that are soldered on the PCB. It is also used for making jumpers i.e. bridging broken tracks.

PCB Holder: While working on a PCB for soldering, you will need a PCB holder so that the PCB does not move.

Handheld Magnifier: It is necessary to see all the minute components and to view the PCB.

DC Power Supply For Mobile Phone Repair Test: It is used to supply power for logic board repairing and booting tests.

Digital Multimeter: A multimeter is used for checking and testing various spare parts and components. It is also used to check broken tracks on the PCB.

BGA Reballing Kit: Used for chip reballing process.

Cutting Nipper: Used for shield plate removal.

UV Dryer Lamp: Used to solidify UV curable solder mask.

Professional Equipment

64 Bit Nand Flash Memory Chip Programmer

Used for iPhone & iPad chip reprogramming and storage upgrading. Fix iTunes errors 9, 14, 4005 (for iPhone 5s/6/6 Plus/iPad 5/ipad 6/mini2/mini 3/mini4).

PCIE Nand Flash Memory Chip Programmer

Used for iPhone & iPad chip reprogramming and storage upgrading. Fix iTunes errors 9, 14, and 4005 (for iPhone 6s/6s Plus/SE/ iPad Pro/7/7+).

CNC Chip Grinding Machine

With the CNC chip grinding machine, iPhone & iPad chip removal can be safe and quick without damaging the logic board and nearby chips.

And more…

Stay tuned for more publications to help you along your journey.

May 27, 2017
Tips for Prolong Your Limited iPhone Lifespan
Choosing Between iPhone and Android: A User Dilemma

Staying updated with electronic product designs and tech news is crucial for the repair industry.

The world is evolving rapidly, especially the electronic landscape, with Apple’s iPhone series dominating a significant market share.

However, the rivalry between iPhone and Android has been the talk of the tech town for the past decade.

So, which side are consumers on? Android users enjoy a diverse range of devices at various price points, offering full features at affordable prices.

On the other hand, iPhone users are drawn to Apple’s quality experience, guaranteed software updates, security, and user-friendly environment.

But what about the lifespan of a smoothly-functioning iPhone? According to Apple, iPhones last for about three years with their first owner.

Despite Apple’s yearly updates, older devices may struggle to support the added weight of new features. How can users extend their iPhone lifespan beyond this three-year mark?

REWA Tips for Prolonging iPhone Lifespan:
1. Manage Data Storage:
  - Store large files on a removable memory card or back up older files externally.
  - Regularly clear excess cached files.
  - Keep only frequently used apps on the phone to manage data storage efficiently.
2. Battery Care:
  - iPhones lose about 20% of battery capacity after 500 charge cycles.
  - Stay informed about signs indicating the need for a new battery.
  - For cost-effective aftermarket iPhone batteries, contact REWA for assistance.
In a world of constant updates, these simple tips can help users make the most out of their iPhones, ensuring they run smoothly and last beyond the typical three-year lifespan.
May 20, 2017
How To Repair iPhone 7 Touch Screen Not Working

iPhone users may have experienced such a frustrated moment – the screen of the iPhone suddenly freezes, no matter how hard they poke or how many times they restart, it just gives no response.

And we all know a phone with a frozen screen equals nothing more than a brick – you can do nothing with it.

So, what repair shops usually do with iPhone 7 touch screen not working issue?

First of all, clean the screen. In the second place, try a force reboot of the iPhone 7.

If the issue continues, try to restore the iPhone from a Backup.

Still not working? The next step is to erase it and set it up as new, which means resetting it to a factory state (remember to make a backup before doing that).

If none of these steps work, then the issue may be related to physical screen display defects, since everyone may have accidentally damaged their phone without knowing themselves.

In such an event, broken screen repair or iPad & iPhone LCD repair could be a perfect solution.

If you’ve forcibly rebooted the iPhone 7, you’ve restored the iPhone 7 from a backup, you’ve set up the iPhone 7 as new, and you have repaired the broken screen and LCD, and the touchscreen is still unresponsive, it’s time to change your thinking and look for a totally different solution.

REWA here presents you a refreshing logic board solution regarding to the unresponsive touchscreen issue of iPhone 7.

If you have any questions or different opinions, please feel free to contact us!

iPhone 7 Touch Screen Not Working Repair

1. Phone Disassembling

Turn on the phone, the touch function is incapacitated.

Remove charging port screws and detach the display assembly.

Disconnect flex cables and remove logic board screws.

Then take out the logic board.

2. Malfunction Diagnosing

Test resistance of the display assembly connector with a digital multimeter.

The resistance of pin 10 displays abnormal value (470 under normal circumstances).

Roll out the maintenance drawing for reference.

Pin 10 worked as AP_TO _TOUCH _MAMBA _CONN _L signal. The signal was connected with CPU AT2 pin via inductor FL3904.

The circuit between pin 10 and inductor FL3904 displays normally.

Test resistance from inductor FL3904 to CPU, the device displays normal value.

Then we can draw the conclusion that inductor FL3904 was damaged.

3. Malfunction Repairing Take down the inductor with soldering iron.

Solder tins on the copper wire.

After that, connect the two bonding pads of the inductor with the copper wire.

Then cut off the rest of it with a sculpture knife.

Test pin 10 resistance with digital multimeter again, this time we get a normal value, which means the problem has been fixed.

4. Function Testing Clean the bonding pad with PCB cleaner.

Assemble the phone and test. Touch function is back to normal.

For more details on iPhone 7 touch screen not working repair guide, please go to REWA YouTube channel.

May 6, 2017