Professional Cell Phone Repair Guide

The iPhone 6 we are going to fix is accepted from customer last week, according to his description, the fault is no service on iPhone 6. It's been repaired before, but it's not fixed. The first step we are going to do is to diagnose the fault from the iPhone. We can't find the operator in manual condition. As shown in picture 8-3-1.        Disassemble the iPhone 6 by phone opening tool , take out the motherboard, we can found that the colleague has been repaired RF parts, now we need to fix it step by step. Let's start with the easiest. Soldering jump wire  on U1、V1 pin, still no service. Because the colleague repaired too many chips, as long as the chip on the RFFE bus has problems, it will affect this. Remove all chips except 2G power amplifier on RFFE bus, the iPhone still no service. Then we replace the antenna switch and RF IC, the problem still the same. It seems that colleagues have amplified the problem. Now we use multimeter  to measure...

iPhone 6S Plus charging fault is a common problem that everyone might meet, recently, we received an iPhone 6S PLUS mobile phone, according to customer's description, he found it reboots frequently and regularly after charging at night, then it cannot be charged on the second day, it was sent to the store to replace the iPhone 6S Plus battery  but invalid. Replace the charging tube, USB controller, field effect on the pipe short, and hit the ground resistance, we did not find any abnormalities. Replace the relevant iPhone IC , the failure can not be resolved. so we take out the motherboard immediately after receiving the goods. As shown in picture 8-2-1. According to the experience,  we judge the motherboard should be unable to detect battery data. Test the iPhone LCD assembly , press the boot button to trigger the boot function, we found LOGO get lighter than the normal device, enter into the system and connect Ace assistant, which really shows no battery data, CPU can n...

Today we are going to fix an iPhone 6 with error, iPhone 6 reparts error 5 6 is a common symptom for cell phone repair technicians, error 5 6 is the new error code after 6, 6P was released. The two common problems are as follows: (1) The SIM card should be pulled out before using the telecom number to flash, and then insert the SIM card after the flash is successful. (2) Camera failure. After iPhone 6, for the mobile phone restore process, when entering into the system firmware, it will be a series of verification, the camera is one of them. In the process, if the camera  circuit problems or camera circuit problems there, it will cause error 56. Get the phone first pull card slot, no card, eliminate the first kind of fault. Connect special machine to flash iPhone 6, it reports error 56, as shown in picture 7-12-1. First disassemble the phone and remove the camera to flash, the fault is still existing. (Note: when disassembling and flashing, it's not really necessary to conne...

The iPhone 6 plus got touch failure or jump randomly before dropping, it can return to normal after press switch. When repair touch IC , the iPhone 6 Plus fell to the ground, the bottom right corner of the touch screen  glass is broken, and the front camera turned black, but the iPhone still can be used. A few days ago, when turn it on; the screen is blurry when the white Apple LOGO appears and it can't enter the IOS.  Now, it can't boot, and the current is 150mA. GPS antenna was broken and now it shows GPS signal is weak when moving. Remove the motherboard (picture 7-3-1), it is shocking to us. The touch IC and WiFi chip  have been repaired, it doesn't matter, and we can fix it by replace the new chip. The most important problem is the capacitance resistor and inductor of back socket was empty solder. As shown in picture 7-3-2. A row of resistors and capacitance, also have bad chips, it's really a headache. Connect motherboard to DC power supply , the current ju...