Professional cellphone repair guide and high quality cellphone repair tools

The problem with the iPhone 6 Touch ID not working properly has been a tricky business for service technicians. The truth is that about 80% of iPhone Touch ID failures are caused by elastic damage to the home button. If your iPhoneTouch ID doesn't work, do you know how to fix it? Today our phonefix shop team will teach you how to fix this problem, please read below. Disassemble the phone and remove the iPhone display assembly . Then check the logic board connector J2118 for moldy condition and dry Joint. We found no abnormal thing. Then, measure the resistance between J2118 and grounding with digital multimeter . The value is also normal. Take down the Home Touch Sensor Assembly and check the home button flex cable. There are obviously broken traces on the flex cable. We preliminary judge that touch ID malfunction is caused by  fractured flex cable circuit. We can fix the fault by replacing the fractured section with a new length of the flex cable. Pry up the back plate wit...

The customer sent us an iPhone X. Isassemble the rear back camera connector socket, the points drop off from base. How to fix it? Using the iPhone Opening toolkit to remove the phone, we found that the pad was removed before it melted. Observe the board carefully under stereo zoom microscope , we notice the board is a little deformed. Seeing the pad, it's a very tricky problem, but we still need to solve the fault. First, it is urgent for us to process the J3900 rear camera soldering pad, flatten and plaint tin again, next, soldering a jump wire . After finished welding jump wire, we need to wrap it around one by one, and apply the UV flux oil  ,one important is that we also need to measure the resistance value by digital multimeter, luckily, it is normal, now we can weld the soldering pad. Then solder the ball on the jump wire, welding the base. Welding tin to the untouched pin and soldered well. Next, assemble the iPhone X and test, to my surprise, the funct...

Today, we will introduce a new product: JC V1 Programmer, whose main function is to repair iPhone light sensors, touch and vibrators. JC V1 programmers support iPhone 7 to iPhone Xs Max, whose main function is to read, write and restore iPhone light sensors, touch and vibrator data. Do you want to know how to use this device? Please continue reading JC V1 programmer main features 1. 24-inch HD display 2. Tri-color LED indicator 3. Two small connectors (for connecting function panels) 4. A function panel (including light sensor / touch connector, baseband function connector, vibration connector) 5. Support 2 languages (Chinese / English) 6. Support for changing the function panel 7. Software update (automatic) 8. Support for three lines of code (read/write/burn/save) JC V1 Programmer Specific functions - Repair iPhone Light sensor/ true tone function (iPhone 7- iPhone Xs Max) - Repair iPhone touch vibrator function (iPhone 7- iPhone Xs Max) - Read/Write iPhone l...

I received the iPhone 6S from the customer. The fault description is that the fingerprint cannot be input, the recorder cannot record, and the audio device cannot be found. After testing, the customer described the failure, and the customer said it might be caused by water entering the phone. How to repair it? Disassemble the machine with iPhone opening tool kit and observe the water in the upper part. Disassemble and find that the component on the right audio and the fingerprint IC are corrosive seriously, we cut the shield with Mini Scissors to check further. Remove the corroded fingerprint IC U4040 , capacitor C4040 C4043 and resistor R4041 then clean the components. The fingerprint function recover norma when test. Next, I will deal with the problem of sending messages. The audio chip U3500 looks very clean, but it is more safe to remove the chip, and we can test the value of pin by the way. This is a main power supply for the audio chip. The disconnection means t...

A customer sent us an iPhone X, and his iPhone X was dropped to the ground. When he picked it up, he found that iPhone X could not be turned on and reported an unknown error 56. Do you want to know how to fix it? Please read the following article. Since the two motherboards of the iPhone X are connected through the middle column, the pins are easily dropped, and the pins of the iPhone NFC chip to the iPhone CPU may fall. Disassemble the iPhone X, take off the iPhone motherboard, use QUICK 861DW hot air rework station to separate the iPhone motherboard, and then we see that there's a row of pins had dropped off. Open the WUXINJI Dongle to check the iPhone X bitmap, we found the circle around it is all the grounding wire, and only dropped 6 pieces useful pins. The grounding wire doesn't need to be filled, we just need to fill these 6 pieces useful pins, these all are the signal line of the NFC chip, so the iPhone X will report unknown error 56 when it is restor...

We received an iPhone 7, the fault description is that the iPhone was once dropped, and the WiFi cannot be opened after the screen is replaced. Where did the fault occur? Please read below. He took the phone to my store for repairs. Unpacking the phone, I saw no signs of repair on the motherboard, and in general, starting with the 6S machine, WiFi is tied to NAND Flash. And because this machine has been dropped before, so we will not shake the NAND flash, we need to protect the CPU and remove the iPhone WiFi IC . Wrap wice with wipe in the CPU position, then wrap around a few circle with the foil. This method is near no problem. After disassembled, two useful points drops from the pad drops . Wrap wice with wipe in the CPU position, then wrap around a few circle with the foil. This method is near no problem. After disassembled with QUICK 861DW Rework Station , two useful points drops from the pad. Add caption  19 and 22 pin on the left side are dropped directly....

We received an iPhone 6 Plus and described the failure of the iPhone 6 Plus to restart indefinitely after the appearance of the white Apple logo. We speculate that the IC that may cause the iPhone White Apple to fail to restart is the CPU, iPhone Nand flash , iPhone logic eerpom IC, iPhone baseband and so on. What should we do now? First we need to check the working status of these chips. Measuring the grounding resistance value and power supply for the iPhone CPU, both measured value are normal. Next measuring the working condition of the iPhone Nand flash, it's also normal. When measured the iPhone eeprom IC, we found the bus (AP_TO_EEPROM_I2C) connected to the iPhone logic eeprom IC and the iPhone CPU has some problem, the grounding resistance value for one of clock bus is more than 600, but the normal data should be around 400, seems there is a disconnection or the pin of the iPhone CPU is empty-welded. Because there are only 1 bus has the problem, so we choose to dig ...

The customer sent us an iPhone 6P. He accidentally dropped it to the ground. After receiving it, the iPhone can be turned on, but we can't test other functions because it doesn't have good touch. The same fault still exists after replacing the screen. Use the iPhone opening tool to open the board for measurement. The bottom of the UMT board is easy to be disconnected, so we plan to dealt with the no- touch fault at first. There are two ways to take the IC: one is to take out with tweezer ; the other is to pick up from the side of IC. After removed the iPhone touch IC , reinstalled the machine, and the phone boot White Apple restart, turn on start current run at 300mA. We haven't repair other place else, only remove the touch IC and check the resistance of the bottom of the board. The resistance is normal after tested by digital multimeter , such problem we haven't meet before. I am a little anxiety see the fallen UMT. Since the start current is too large, tak...

We received an iPhone 7 Plus, and the customer said that there was some water entering the iPhone 7P, and the iPhone was still available at the beginning. After a day, the iPhone always reboots and cannot enter the IOS system. How to fix this fault? The fault of the iPhone is the same as the description of the customer, it has been brushed, now we need to brush the iPhone directly to check the error code. After brushing the iPhone 7P, the iTunes reports error 9 (the process bar just flash 1 time and then the unknown error code was reported). For the error 9 on the iPhone 6S and later iPhone, mostly it's caused by the problem of the iPhone Nand flash and iPhone logic eeprom IC. Measuring the power supply of the iPhone Nand flash by digital multimeter , the 3V, 1.8V and 0.9V all are normal. After checking the iPhone motherboard, we found the iPhone Nand flash and iPhone logic eeprom IC had not been repaired by the previous repair shop, but the iPhone baseband had been r...

We received an iPhone 8, this iPhone 8 has no vibration. First try to replace the vibrator, we found that the motherboard does have problems. We only replace the iPhone vibrator IC first. Before taking the repair, take a photo of the location and find a piece of material. We recommend that all new machine parts can purchase this iPhone junk motherboard directly . Many pieces of this board can be removed, and replaced a one, just press the mute button and look in the settings. When enter the test interface, there are several vibrations. But after selected other option, there is no vibration? When press the mute button, nothing at all. What is the situation, the chip is been burned? Remove the chip by Quick 861DW and measure the value! Look for a resistance map and test with digital multimeter , the result is normal, then install, turn on and test. From the beginning, there are vibrations, but after entered into option and pointed two , there is nothing. We feel...

The customer said that his iPhone 8P accidentally fell into the water last night, and the iPhone 8 Plus could not be activated when he picked it up. The next morning, the customer sent it to us. After we received the iPhone, we found that there was a lot of water entering the iPhone. Take out the iPhone motherboard , clean it up and dry it. After drying please don't supply power to it, we need to observe that which position has more water, so we can avoid burning other circuit components because of the power supply. After checking, we found the area that was seriously damaged by water, there are 6 pieces capacitors on the left corner are corroded, directly remove it by the brush. Because they don’t affect the boot of the iPhone, so we don't need to deal with them now. Put iPhone under the T rinocular Integrated Microscope , we found these two capacitors also was burned, after testing, they all in short-circuit status. Open the ZXW Dongle to check iPhone schema...

The customer sent us an iPhone 6s, and he said that his iPhone 6s could not be turned on. We asked the customer if there was any anomaly when it was opened. He said that he charged before booting, but when plugged in the iPhone USB charger , he found that the charging icon appeared intermittently, the iPhone repeatedly flashed a few times and then a black screen, and then pressed the power button does not respond. According to the customer's description, we could judge where is the problem proximately come from, which caused by charging. The three components Q2300, U2300, U4500, which are directly related to charging, according this direction, we start to repair. Repair Steps The first step we should take is to connect it to the DC power supply and test the current, the trigger current jumps directly from 200 A, while the normal current should be around 40 mA. This phenomenon is likely caused by a short circuit in the mains supply's LDO supply. PP3V0...

We received an iPhone 7, iPhone 7 has no service and cannot make calls. The iPhone 7 has been displayed in other repair shops to 128GB. After the iPhone Nand flash is expanded, the iPhone 7 always shows no service, search and eventually the white Apple restarts. After brushing the iPhone to IOS 12, it can enter the system, but still has no service and cannot be activated. Disassemble the iPhone and use a digital multimeter to measure the power supply capacitance around the iPhone's baseband power IC . We found that PP_1V0_SMPS5 is shorted. Usually, this situation is caused by a short circuit on the iPhone baseband. IPhone baseband power is removed, and then measured again PP_1VO_SMPS5, it is still short-circuited. This is a designed flaw of iPhone 7 Qualcomm version, the iPhone baseband S5 power grounding connect point seems to be disconnected, but not, and it cause iPhone baseband burned. The solution is put iPhone motherboard under the Trinocular Integrated...