iPhone IC list: the IC can be replaced on iPhone motherboard

When the iPhone has hardware failure, generally we need to check iPhone motherboard, and then we will find that some iPhone chips or components were damaged. At this time, we can try to repair it, but some IC or components ware damaged, or it's hard to repair, so we can repalce it with the new one.  Here we can get an iPhone IC list, so than we can know what ICs that often needs to be replaced on the iPhone motherboard

Common replaceable Chips For iPhone 6/6 Plus
IC Name	Number on the PCB board	Model
PMU	U1202	338S1251-A2
USB charge IC(U2/Tristar)	U1700	1610A2
Touch screen control IC(Black)	U2402	343S0694
Touch screen control IC(White)	U2401	BCM5976
WIFI module IC	U5201_RF	339S0242
Display IC	U1501	65730AOP
Backlight IC	6:U1501 / 6P:U1502 U1580	LM3534TMX-A1  DY
Baseband PMU	U_PMICRF	PM8019
Big RF IC/ Mid Frequency IC	U_WTR_RF	WTR1625L
Speaker Amplifier/small Audio	U1601	338S1202
Audio IC/ big audio IC	U0900	338S1201
Flashlight LED IC/ Flash Control IC	U1602	64A1
Fingerprint Boost IC	U1503	3638
Backlight Boost Diode	U1501	NSR0620P2XXG

Common replaceable Chips For iPhone 6S/6S Plus
IC Name	Number On the PCB board	Model
Power management IC	U2000	338S00122-A1
USB charger IC(U2/Tristar)	U4500	1610A3
WIFI module IC	U5200_RF	339S00033
Display IC	U4000	65730AOP
Backlight IC	6S:U4020 / 6SP:U4020 U4050	3539
Baseband PMU	U_PMU_RF	PMD9635
Big RF IC/ Mid Frequency IC	U_WTR_RF	WTR3925
Speaker Amplifier/small Audio	U3800 / U3700	338S1285
Audio IC/big audio IC	U3500	338S00105
Fingerprint Boost IC	U4040	3618J2
Flashlight LED IC	U3300	64A1

Common replaceable Chips For iPhone 7/7 Plus
IC Name	Number on the PCB board	Model
PMU	U1801	338s00225
USB charge IC(U2/Tristar)	U4001	610A3B
WIFI module IC	WLAN_RF	339S00199
Display IC	U3703	T1G2C1N31
Backlight IC	7:U3701 /7P:U3701 U4601	61A2Y1L
Baseband PMU	BB PMU_RF	PMD9645
RF IC/ Mid Frequency IC	XCVRO_RF	WTR3925
Speaker Amplifier/small audio	U3402 U3502 U3301	338S00220
Audio IC/big audio IC	U3101	338S00105
Fingerprint IC	U3702	3638J2

 

How to best fix iPhone 6 error 4005?

Apple iPhone iTunes error problem is common, now here is an iPhone 6 with unknown error 4005 problem, how to best fix this problem? Generally, we can try some simple solutions first, if it's not working, then we can check the hardware aspect.

Some simple solutions (software aspect):

-  Force restart iPhone 6
- Make sure the iTunes is latest version
- Try another lightning cable or USB port

After trying this solutions, the iPhone 6  still has unknown error 4005. 

Next, disassemble the iPhone 6.  Use phone opening tools to disassemble the iPhone 6,  and then remove the iPhone motherboard.

Now use digital multimeter to measure the iPhone Nand flash, power supply 3V, iPhone power supply C0604 1.8V, CO603 1.2V and C0625, all voltage tested are normal. Next measure the resistance value for iPhone Nand flash, but it's still normal.
Use QUICK 861DW hot air rework station to remove the iPhone Nand flash, and the put iPhone motherboard under the microscope, re-welding the pins on the iPhone Nand flash, and then solder the iPhone Nand flash back to iPhone motherboard.

Next assemble the iPhone 6, connect iPhone to the computer, and then use iTunes to restore it, now it works, there is no unknown error code.


Testing the functions on iPhone 6, they all works properly. The iPhone 6 unknown error 4005 has been fixed!

Troubleshooting Tips: unknown error 9 occurred on iPhone XR

There is an unlnown error 9 occurred on iPhone XR when we try to resore it with iTunes,  how to fix it? Here are some troubleshooing tips.

Fristly, use iTunes to restore the iPhone XR again, it's still failed to restore, and reports unknown error 9. Now, we can try the following troubleshooing tips to fix this problem.

1. Force restart iPhone XR

If this unknown error 9 is caused by some simple software problems, then restarting is a good solution, because the most of simple software problems can be fixed by restarting.

In order to force restart iPhone XR, please quickly press and release the iPhone Volume Up button, and then quickly press and release the iPhone Volume Down button, at last, press and hold the iPhone power button  until the Apple logo appears, and then release.

After restarting the iPhone XR, connect it to the computer to test it again, if the unknown error 9 still exist, then you should try another solutions.

2. Check connections between iPhone and computer

If the connection between the iPhone XR and the computer is fragile or incomplete, then it will cause the iPhone XR to fail to restore and report the error code.

In order to avoid this case, we need to check iPhone lightning cable and USB port. Make sure you are using an Apple lightning cable with good quality, try different USB port, or try another computer.

After you try these methods, if the iPhone XR error 9 still exists, then you should try another solution.

3. Reset all Settings

The setting problem also will cause iPhone got an unknown error during the restore, if the iPhone XR has some invalid settings, it will cause iTunes or access to deny the computer programs or other apps. We can try to fix it by resetting all settings.

In order to reset all Settings, please go to Settings-> General -> Reset -> Reset all settings.

After resetting, please re-restore it, if it still not working, then try next solutions.



4. Check iTunes version

As we know, if we want to use iTunes to update IOS or restore iPhone, the first thing is that we need to update the iTunes to latest version, so we can make it works smoothly.

Please open iTunes on the computer, and then check it if it's the latest version. If not, please update it to the latest version, and then use it to restore the iPhone XR again.

If the iPhone XR is still unable to restore with the latest iTunes version, then please try another solutions.

5. Contact Apple Care

If all of above solutions are not working, and you have no ideas for it, then you can contact Apple Care for help. They will help you to fix the iPhone XR with their professional phone repair tools and skills.

Solution: iPhone 7 won’t turn on and WIFI failure after dropping

Here is an iPhone 7 won't turn on after dropping, the iPhone motherboard is damaged, and there is a short-circuited problem, we can get a solution here!

First, try to power up, we found a large current leakage, and continue to test by digital multimeter , we know the 3V power supply short circuit. Observe seriously, the motherboard card slot position is bent, and the short circuit may be in this position. Remove the two capacitors next to the NAND flash by QUICK 861DW Hot Rework Station  and power on, the phone turn on normally.

 Test function after turned on, we found no Wifi, sometimes stuck when enter the settings. When check, the Wifi clock signal R0807 end has 1.8V, the other end through the Wifi module 17 pin have no voltage, we replace the resistor, but the fault remains. Remove the iPhone Wifi IC, the soldering pad drop the point.

Originally, we plan to turn on phone without install the Wifi module,  and test its function. But there is leakage when power-up, we have to apply rosin. After removing the heating capacitor and test, the setting function is normal, no longer stuck, next install the WiFi module.

Assemble the iPhone 7, power on iPhone, after entering the IOS system, test the iPhone WIFI function, the iPhone WIFI function is working. Continue to test the ohter functions, all works good. The repairs end!

2019 latest solution for iPhone 6 Plus No Display Problem

We received an iPhone 6 Plus to repair, the faulty described is that this iPhone 6 Plus doesn't display, after replacing the iPhone display power IC, the problem is still exist, and they have no idea how to fix, so they send iPhone to us. 

Disassemble the iPhone 6P by phone opening tools, carefully take out the iPhone motherboard.

Put iPhone motherboard under the Stereo Zoom Microscope and then use QUICK TS1200A hot air gun to re-weld the iPhone display power IC that has been replaced by co-worker, and then test it, but the iPhone screen is still not display.

Now use digital multimeter to measure the power output voltage -5.7V and 5.7V of the iPhone display IC, there is no output, which means the iPhone display power IC doesn't work properly.

Open the WUXINJI Dongle to check U1501 working principle, we know that if the iPhone display power need works properly, it must have 3 conditions, they were power supply, reset and boot signal. Measure the L1519, there is 4.2V main power supply, the reset signal 1.8V is also normal. When measure the boot signal, no voltage was found, this is abnormal.

Check FL2035, it's disconnected, remove it, and then short connect it with jumper wire.

Install the iPhone 6P, now the iPhone displays properly, the trouble has been solved.

Repair iPhone X Rear Camera Failure With Hardware Solution

The iPhone X rear camera was damaged by dropping, during the rear camera disassembling, some iPhone X rear camera socket pins are fell off, we need to repair it, so the iPhone X rear camera can work normal. Here is the hardware solution for reparing this problem.

Firsly, remove the iPhone X rear camera socket,  observe it under the Trinocular Integrated Microscope .  We found that some pins are still not melted, but they has been remove, and the solder pad is deformed.

Clear up the J3900 rear camera solder pad, and then paint some tin on the solder pad. Now we need to solder the jumper wire by QUICK 861DW hot air rework staton on the solder pad.

After soldering the jumper wire, wrap them up one by one, apply some green UV oil to it, and then use UV lamp light to solidify them.

Welding tin balls to freshly welded jumper wire,  and then  install the socket.  Apply some solder paste to those pins, and then use QUICK TS1200A soldering iron to weld it.

Install the iPhone X,  press the iPhone power button, it is turned on smoothly. After entering the IOS system, turn on camera, the iPhone X rear camera can work normally. Test other functions on iPhone X, all works perfectly, the repairs end! 

Repair Guide: iPhone 6 Plus rear camera not working

A customer sent us an iPhone 6 Plus to repair, after turned on iPhone rear camera, it shows black and no images, the iPhone rear camera is not working. Toggle it to front camera, it works good, the iPhone front camera can take pictures. How to repair this iPhone 6P rear camera not working problem? 

According to the trouble phenomenon, the iPhone 6 Plus rear camera won't take pictures, but the iPhone front camera can take pictures, which means the public control part is normal, we just need to check circuits that are only used in the iPhone rear camera.

Firstly, we need to disassemble the iPhone 6 Plus. Use JM-P01 Phone Teardown Toolkit to disassemble the iPhone 6P, and then remove the iPhone display assembly.

Secondly, replace the new iPhone rear camera. After replacement, the iPhone rear camera still not working, the failure is the same. Now we confirmed that it's not the problem of the iPhone rear camera, we need check circuits.

Thirdly, use digital multimeter to measure the power supply of the iPhone rear camera, when measured the 34th pin, we found it has no voltage.

Fourthly, open the ZXW dongle to check iPhone schematic diagram, we saw that this circuit is the power supply of a 2.8V, it's supplied by camera LDO chip U2301.

Fifthly, use QUICK 861DW hot air rework station to remove the camera LDO chip U2301, and then install the new U2301. After installation, measure it again with the digital multimeter, now the data measured is normal.

Finally, assemble the iPhone 6 Plus, power on iPhone and test it, now the iPhone rear camera works properly, it can take pictures and videos.