Analysis and solve iPhone camera not working (iPhone 6S rear/front camera)

 The iPhone 6S camera won't take photos or videos, what's going on? There are many reasons to cause this issue. In this article, we will analysis the reasons and then provide the solutions to fix iPhone 6S camera not working error.

Front Camera Repair

If the front camera can not work normally, check the FL3100 FL3102 FL3104 short connection. Re-stall or replace the iPhone  power IC.

In addition, the flash IC damage will also cause failure to take photos or videos. Replace the iPhone 6s flash IC(VC497) can fix the problem.

Rear Camera Repair

 

There are three circuit lines that affect the work of the iPhone camera:

The first circuit is 1.8V from the IC power supply, 1.8V power supply was sent to FL3220 rear camera interface through inductor FL3220, and inductor 3220 is easy to get corrosion damage so that 1.8V is not able to be sent to rear camera interface, use jumper wire to do short connection will solve the problem.

The second circuit power 2.85V is supplied by U3200, the U3200 output voltage 2.85V was sent to rear camera interface through inductor FL3202, the rear camera fault is mostly caused by U3200 damage so that 2.85V is not able to be supplied to rear camera, the 2.85V voltage is not able to be tested by Fluke 15B+ DigitalMultimeter until there is resistance C3200 when taking photos. It's not easy to measure because of narrow place, so we can connect an enameled wire on capacitor C3200 for convenient measurement. Turn on the camera and test it immediately. If it is a good handset, it can measure 2. 85V voltage, if the 2.85V voltage is not measured when the camera is turned on, it indicates that U3200 is damaged. This situation can be also solved by phone repair jumper wire connection.

The third circuit is 1.2V PP1V2_CAMERA from the power supply IC, the 1.2V power supply was sent to rear camera interface J3200 through inductor FL3201, if the voltage is not sent to the iPhone 6s rear camera interface, it is generally caused by FL3201 corrosion, use jumper wire to do short connection will solve the problem.

Tips:

In order to fix solve this proble smoothly and quickly, you can check the iPhone schmatic diagram on WUXINJI Dongle.

DIY FIX: iPhone 7/7P leakage and won’t boot issues

In previous iphone repair cases, we often encounter iPhone7 and iPhone 7 Plus leakage or won't boot problem. So, in this article, we are going to share solution for DIY fix it. 

Disassemble the iPhone, remove the motherbaord  and put it under the Trinocular Stereo Microscope to check, and then check iPhone schematic diagram on WUXINJI Dongle,  we can know that the battery voltage VBATT is firstly sent to the iPhone 7 charging IC, it outputs the main power PP_VCC_MAIN and then supply to the power supply IC and other related circuits.

When the iPhone power button is pressed, the IC output voltage of the power supply is supplied to iPhone 7 CPU, NAND and other related circuits respectively. The battery voltage VBATT and the main power supply VCC_MAIN are sent to the relevant circuit before turning on the iPhone 7, in this case, if there is power leakage or large current when connecting with DC power supply, it means that either the battery voltage VBATT or main power fupply PP_VCC_MAIN has short power leakage component. There are plenty of components are connected with these 2 circuit, use rosin will help you to find the damaged one quickly. 

Specific methods are as follows:

1. Measuring the of the grounding resistance of the iPhone 7 battery voltage and the main power supply to find the short-circuited part

2. Use rosin to smoke the iPhone 7 motherboard parts into white color

3. Then add voltage in the short-circuited part, the voltage will gradually increase from zero, after a while, the short-circuited part will heat and rosin will melt, so you will see it immediately.

After find the faulty part, use QUICK  861DW to weld the jimper wire on it, and then measure it again. You will find the problem was solved!

Excellent solution: iPhone 6S Signal Part Fault

Here, we provide a excellent solution for repair iPhone 6S signal part fault. What does the iPhone 6S signal part fault mean?  Thay mean if iPhone signal abnormal, then your iPhone 6s wil show no service or can't make the phone call and so on.   Here are several signal failures cases.

The signal part is mainly composed of baseband CPU--U_BB_RF, baseband power U_PMU_RF, intermediate frequency U_WTR_RF, 2G antenna switch ULASM, 3G/4G antenna switch UHASM, preamplifier UDIVA_RF, 2G power amplifier U2GPA_RF, 3G power amplifier, 4G power amplifier UHBPA_RF and power supply U_QPT_RF.

First case, no signal at all. We should make clear the baseband is starting properly, then input *#06# in the dial-up interface, if the iPhone 6s screen does not appear a string of numbers (IMEI code) which means that the baseband does not start properly, for some iPhone devices, you can see IME but if the iPhone screen does not display the IMEI after entering *#06# on the dial-up interface, it also means that the baseband doesn't start normally, this is usually caused by the baseband CPU false welding, or it's also possible that baseband power is false welding, the solution is to replace new iPhone 6S CPU or baseband power parts.

If you input *#06# and see IMEI codes, it means the baseband belongs to normal start, in this case, try to install different SIM card separately, if all the SIM cards you install have no signal, the problem in the public sector, or if IC emission power supply problems, this possibility may be a bit bigger, the iPhone baseband CPU or baseband power may also cause the situation. Replace new parts can solve the signal problem.

Second case, part of SIM cards have no signal. If there is no signal for part of the SIM card, for example, there is a 4G network but you can't call on the phone. It means that there is a problem in the 2G transmitting part, since the mobile 4G needs to switch to 2G when it calls, which is usually the problem of 2G power amplifier or 2G antenna switch, replace new parts can solve the problem.

If there is 2G but no 4G signal, the problem is on the 4G amplifier and the iPhoneantenna switch. Replace new parts can solve it!

Different fault need different solutions. Before you are going to fix it, you need find out the reason first. 

Fix iPhone common issues by replace iPhone PCB chips

Today, we are going to introduce iPhone replaceable IC, so you can fix iPhone common issues by replace iPhone chips on iPhone motherboard.  As we know, iPhone runs on many IC combinations, Some damaged iPhone IC will not have a big impact, but most iPhone chips can directly affect the iPhone, even leaving it unable to work. So, it's important to know what iPhone chips canbe repalced!

1. iPhone Mid Frequency IC camera flash control IC

5S blue screen IC 4pin U6
5S/6 display 20pin 65730
6 disply 9pin 3638
6 light control ic 12pin DY
5/5S light control ic 12pin DZ
6/6S fingerprints light control 9pin  3638
5S/6 camera flash control 20pin 64A1
5/5C camera flash control 16pin
6S / 6SP light control 16pin 3539 (back light)
4S RTT8605
5 RTT8600
5C/5S WTR1605L
6 WTR1625L
6 fingerprints IC 4pin
6S fingerprints IC 5pin
7/ 7P light control 16pin 3539 (back light)
7 IC WTR4905 1VV
6S IC WTR3925
WTR1620
WTR4905 0VV
6s/6sp 9pin fingerprints U4040 IC 

2. iPhone Touch Screen Controller Chip

iPhone 4 4S 5 5S 6 6P touch screen control IC, White / Black iphone Touch Control IC For iphone 4 4S 5 5S 6 6P,

iphone 4 touch IC
iphone 4S touch IC 343S05338
iphone 5/5C touch IC White BCM5976C
iphone 5 touch IC Black 343S0628
iphone 5S touch IC Black 343S0645
iphone 6 touch IC White BCM5976
iphone 6 touch IC Black 343S0694
iphone 6P touch IC White
iphone 6P touch IC Black
iphone 6/6P power ic U2403
iphone 5S IC White BCM5976
7/7plus -touch screen control IC- motherboard -short
7/7plus - touch screen control IC - Screen - long


3. iPhone NAND Flash (16G/32G/64G/128G/256G)

The Default iphone Nand with unlocked SN code, and remove bypass locked id. if you need fix Nand error or upgrade Nand storage,  must write the same SN number on the nand.

NAND Flash LGA50, 32bit
E2NAND Flash LGA60, 64bit
NVMe NAND Flash LGA70, PCIE

4.  iPhone wifi module IC

iPhone wifi WLAN Bluetooth module IC for iphone 4s 5 5S 5C 6, iPhone 4S 5 5S 6S 7 WIFI Module and Wi-Fi Antenna Replacement IC,

iphone 4 339S0092
iphone 4S 339S0154
iphone 5 Wifi 339S0171
iphone 5S/5C Wifi 339S0205
iphone 6/6p Wifi 339S0228
iphone 6s/6sp Wifi 339S00043
iphone 6s/6sp Wifi  339S00033
iphone 6/6p Wifi   *0242
iphone 7  Wifi *00199 / 339S00199

5. iPhone diode IC Coil Filters IC

iphone Logic Board Motherboard Backlight Repair IC, Backlight Diode and Coil D1501 L1503 T5301 L240 for iphone

6S/6SP  D4021 Back-light Boost Diode
6S/6SP  D4020 Back Light Diode
6S/6SP  L4021 Backlight Boost Coil
6S/6SP  L4020 Back Light Coil
6 big L1503 Backlight LED Coil
6 4pin T5301 4 pin ic capacitance
6 D1501/1589 diode
6 L2401 Capacitor inductor IC
6 L1519 Back Light Coil


6. iPhone Power Drive Control IC

iPhone USB Data Charging Power Control IC Chip,

iphone 4 338S0867 / 338S0822
iphone 4s 338S0973
iphone 5  338S1131-B2
iphone 5C  338S1164-B2
iphone 5S  338S1216-A2
iphone 6/4.7  338S1251-AZ
iphone 6P  338S1251
iphone 4S small power PM8028
iphone 5/5C/5S small power PM8018
iphone 6/6p small power PM8019
iphone 6s big power IC
iphone 6s baseband power
6s small power PMD9635 IC
7/7P small power IC PMD9645
7/7P big Power IC
7/7P 338S00225-A1 PMD9645 Baseband Power

7. iPhone big small Audio IC

4 0589
4S 0987
5 big Audio 1117
5 small Audio 1077
5C big Audio 1116
5S/6 big Audio 1201
5S/6 small Audio 1202
5 big Audio 1117
6S small Audio1285
6S/7 big Audio 00105
7/7P Small Audio 00220
7/7P Big Audio 338S00105
6 U1601 small Audio

8.  iPhone  CPU（A8 A9 A10 A11）

A4 Complete (double-deck)
A5 upper lid
A5 Complete (double-deck)
A6 upper lid
A6 Complete (double-deck)
A7 upper lid
A7 Complete (double-deck)
A8 upper lid
A8 Complete (double-deck)
A9 upper lid
A9 Complete (double-deck)
iPhone 7 A10 upper lid
7P A10 upper lid

9. iPhone light control IC

6 9pin light control U1503 3638
6 12pin light control U1502/1508 (DY)
6 20pin Display U1501
6P 20pin Display IC AS3923
5/5S/6 12pin light control U1502 (DZ)
5/5C 20pin Display U3
6S/SE light control 3539
7/7P 16pin light control 3539
6S/7 20pin Display 65730


10. iPhone U2 USB Charging IC
for iPhone 5 5S 6 U2 IC 7 6S USB control IC charging IC 1608A1 1610A2 1610A3

1608A1:  iphone 5
1610A1:  iphone 55S
1610A2:  iphone 5 6 / 6 Plus
1610A3: iphone 5 6S/ 6S Plus
68803: iphone 5 9PIN
68815: iphone 6 / 6 Plus 9 PIN
SN2400B0: iphone 6 / 6 Plus 35 PIN
SN2400ABO: iphone 6S / 6S Plus 35 PIN
610A3B: iphone 7

How to fix dead iPhone 7 display screen by yourself (black screen)

Today, we are going to fix dead iPhone 7 display screen. The iPhone 7 screen has no display when it is turned on. What causes this?  Let's check it step by step.

1. Carefully disassemble the iPhone 7 and disconnect the battery. Put iPhone connect to DC power supply, the boot current is normal, but the display screen still black.

2. Carefully disassemble the display assembly, and replace with new one. Once again put iPhone connect to DC power supply and then power up, the boot current displays normally, but iPhone still goes with no display. So, we suspected that this problem is caused by motherboard backlight circuit broke down.

3. Teardown the iPhone, take out the motherboard. Measuring the grounding resistance value of J4502 with multimeter, the data is normal, which shows that the backlight circuit is also normal.

4. Because the backlight signal is connected directly with backlight IC U3701, now we can judge that the backlight IC U3701 broke down.

5. Paint some BGA Paste Flux, take down the backlight IC with Hot Air Gun at 320 degrees. Now, we need to clean the tins, use soldering iron blow it first, and then use PCB Cleaner to clean it again.

6. Paint some BGA Paste Flux again, align the backlight IC in the correct position, and then solder it with hot air gun. Cooling the motherboard, and then use PCB Cleaner to clean it.

At last, assemble the iPhone well, and then turn on iPhone to test, the white Apple logo appears smoothly. The repairs end!

Free solution to fix iPhone 8 common issues--iCloud/battery/earpiece

After using iPhone 8 for a while, some problems are emerging, such as iPhone iCloud restore, iPhone battery swelling, battery life, earpiece crackling, 3D touch issue, ect.  These all are the common issues, so it's important to know how to fix it. Here are free solutions to fix these issues.

1. iCloud restore problem

Sometimes, the iPhone 8 gets stuck updating iCloud Settings. If you are facing this problem, please create a local backup on your computer, and then restore the backup to your iPhone 8. Then you need to press and  hold down the power button and volume down until it reboots itslef. Once it reboots, try the process again.

2. Swelling battery problem

The iPhone 8 plus battery swelling up and causes the screen to detach from the device main unit is a common thing that affects users around the world. For this problem, you can replace the new iPhone battery or contact the Apple.

3. Battery life problem

Not just iPhone 8 has this problem, acctually, most cellphone all has this problem. It is common that iPhone battery problems, such as abnormal battery drain. There are two reasons to cause this issue, one is hardware problem, the other is applications and software. For hardware problems, you need send it to professional guyd to fix it. For software and Apps problem, you can try to restart iPhone, use low power mode, manage Appls and so on.

4. Crackling earpiece problem

Maybe you have noticed that crackling earpiece during calls,a repetitive, intermittent static sound or distortion that makes it difficult to hear correctly during normal and FaceTime calls. When you are facing this problem, the first thing you need to do is reboot iPhone 8. If it is not working, please check receiver to make sure it isn’t blocked. Or waiting for software updates.

5. Frozen display screen or 3D touch problems

Sometime, the iPhone 8 display screen is unresponsive, the first thing to do is reboot it.Hold down the Sleep/Wake button and then slide to power off, assuming it works. Press the Sleep/Wake button to turn it back on again.If you want to reset it, please back your iPhone 8 first. About 3D touch problem, you need to adjust the sensitivity of the function to better meet your needs. Go to  Settings > General > Accessibility > scroll down to 3D Touch and tap.

6. Wi-Fi and Bluetooth problems

If the iPhone 8 cannt connect to wifi, you can reboot the router, reset network settings for iPhone 8,or restart iPhone. If all these steps cannot work, maybe you need to contact Apple or send it to the phone repair shop. The Bluetooth problem also is hard to solve just like wifi, but you can try to re-reconnect it or reset the iPhone.

7. Overhearting problem

It's not uncommon for electronic products to overheat. Sometimes, when you running several Apps or play games in your iPhone, the iPhone will get warm or even very hot. However, if it gets too hot, the iPhone 8 is designed to disable certain features, like the flash, display a temperature warning on screen, and shut itself off. The reason for overheating is because iPhone CPU cannot dissipate heat in time. In this time, you need to get your iPhone to rest, until it cool down. Or you can reboot your iPhone, turn off location services, even  restore it.

Check cell phone iPhone schematic diagram online without Dongle (Easy Draw)

Good news! We can use online account and password to check cell phone iPhone schematic diagram.  The Easy Draw Phone Repair Schematic Diagram supply us this service. The details as follows.

As we know, WUXINJI once had an online account and password to check iPhone schematic diagram, but now WUXINJI card is out of production, only has WUXINJI Dongle. So, Now the Easy Draw is the only one in the world that can be used right away without the use of Dongle. It's very convenient for users.


How to use it? It's very easy, first download the software, and then register on it to get the account, and then send accout to sellers, they will activate it.

Easy Draw can supports iPhone, iPad, xiaomi, Gionee, Oppo, Samsung, Huawei, VIVO, Mito, Meizu, ect. In a word, it almost support all cell phone. It also offers teaching videos and repair manual to watch. It is powerful phone repair assistant, support online updated.

If you need it urgently, you can choose Easy Draw, it can same time. With the help of Easy and other phone repair tools, you can fix cell phone easily and successfully.