跳至主要内容

Fixed: iPhone 6 Won't Turn On


iPhone 6 is directly connected to the DC power supply after short circuit, large current short circuit and iPhone motherboard overheating. We think this is a small problem. When we remove the iPhone, we find that the iPhone charging tube is hot. Remove the shield and apply some rosin. Obviously, the iPhone baseband power supply is damaged. Delete the iPhone baseband power, then connect the iPhone logic to the DC power, the iPhone start, but not display, more clearly check, several pins on the socket are damaged.
 


Remove the socket and clean the pads, re solder the socket. After replacement, iPhone can be turned on normally, but there is no baseband.

Install the new iPhone baseband power supply, but there is no SIM card failure, continue to measure it, and no front and rear cameras. IPhone 6 no front and rear cameras are usually caused by a 2.85 volt power supply. A regulated converter is found directly. Scrape off the glue and weld the jumper. We can check the bitmap in WUXINJI Dongle.

Based the picture, soldering a jumper wire from photosensitive 3V to camera 2.85V, and then test the iPhone camera, the rear camera is normal, but the front camera not. The data measured by Fluke 15B+ Digital Multimeter all is normal. We think the iPhone has been flashed when the camera is damaged. Because there is an ID, so we can't flash the iPhone, and the customer doesn't care this failure, so directly install the iPhone.

After install the iPhone, turn on iPhone, after Apple logo appears 2 seconds, it's automatically turned off. Connect iPhone to the DC power supply, the current jumps from 80 to 160, after a while, it turns 0. According to our experience, we think it's iPhone Nand flash problem.


From the above picture, we can see that this shield cover has been dented by a lot of external damage，it seems the iPhone Nand flash virtual weld. Directly remove the iPhone Nand flash, re-weld it and then install it, but the problem still there.


Now, we need to flash the iPhone, get the ID from customer to flash the iPhone by iTunes. After flashing the iPhone, the problem was solved, it's a system problem.
Learn more cell phone repair tutorials on www.vipfixphone.com

评论

发表评论

此博客中的热门博文

Iphone 6S Enters DFU Mode Cannot Start Fault Repair

The customer said that he did not know what the reason was. The mobile phone has been restarted indefinitely and can enter the DFU mode. However, when the flashing machine fails to enter the recovery mode from the DFU mode, and then the mobile phone is connected to the computer for 5-10 minutes, it automatically enters the recovery mode. After we received the 6S that could not be started, we disassembled the power with iphone engraving tool and turned on the power to 100mA. First of all, check if you can connect and read the DFU mode after connecting to the computer. Wireless DFU can not exit, we can only brush the machine to view the error. Refresh Aisi and iTunes respectively. If you stuck on the progress bar for a long time, it is very likely that the error is -1. If the progress bar does not enter, you can roughly determine the probability of a CPU failure. Now we need to see if there is a problem with the hard drive. First, use DC power supply for iphone repair, the hard disk o
发表评论
阅读全文

Solution: iPhone 7 Baseband Fault

Phone 6 Plus touch M1, iPhone 6 baseband u1v1 and iPhone 7 audio problems are very common for phone repairmen. At first, we can weld  iPhone touch IC  or re-install touch IC to fix iPhone 6P touch problem, but after a while it need to be repaired again. Later, we figure out that we can repair the problem by   jump wire . The baseband u1v1 and audio problems can also be used in the same way. The first layer of these iPhone motherboard layer circuit lines is very fragile and easy to disconnect or virtual welding, some are not broken by the naked eye, but in fact it is almost disconnected, weak links, at a critical point. Now, let's back to iPhone 7 baseband problem, most people think it is Qualcomm baseband problem, and we think it's still the same as before, it's iPhone motherboard design flaws.  Check the working schematic diagram of the iPhone baseband power supply through WUXINJI Dongle , it's amazing, as shown in picture 1. Put iPhone 7 and iPh
发表评论
阅读全文

Repair Guide: iPhone 7 7P Fingerprint & Home Button Repair

If the fingerprint and home button function on iPhone 7 / 7p get failure and you don't know how to fix it, now this article will be your guide for the detailed repair process! Hope it will help!   Before repairing, open the WUXINJIDongle  to check iPhone 7/7P schematic diagram. 1. iPhone 7/7P home button repair guide The home button power supply schematic diagram is as follows: The power supply pipe U3801 output PP2V75_MAMBA(275V) to J3801, iPhone power IC  output PP1V8_TOUCH(1.8V) , through resistance R3805, final to J38011. If these two circuit power supply is abnormal, it will cause iPhone home button  failure . For repairing this problem, check short connection R3805, and then you can replace the U3801 or disassemble the U3801, and then use PPD 861D Plus   hot air rework station to weld the jump wire from C3813 to C3823. Tips: PP3V0_MESA(3.0V), PP1V8_MESA(1.8V), PP2V75_MAMBA(2.75V) and PP1V8_TOUCH(1.8V), this four circuits voltage can be teste
发表评论
阅读全文