Professional cellphone repair guide and high quality cellphone repair tools

A customer said: his ihone 6s cannot be turned on after replacing the camera power supply chip. If you come across this situation that iPhone 6s not turning on when holding down the power button. Maybe your iphone screen was dead, someone want to save the money and time to choose fix it. Now vipprog can help you. Issue: The camera cannot take photos, so the customer changed camera 2.85V power supply chip  U3200. After turning it on, it immediately turns off. When receiving the iPhone and testing, it cannot be turned on. Solution: 1. After connecting adjustable power supply, there is no electricity leakage. Short connect it and turn it on to trigger the signal BUTTON_HOLD_HEY_CONN_L (picture 1-1). There is no current. Measure the power button signal and there is 1.7V voltage, which suggests that the standby circuits and trigger circuits have no problem. 2. Connect adjustable power supply to energizing motherboard  and use USB cable  to connect iPhone and computer. Based on

Nowadays the smartphones are one of the important things that in our life. We preserve our important data, files, images and videos to our iPhone. But if you accidentally drop your iPhone in the water, what can you do? Don't worry, Now vipprog can help you tide over difficulties. Issue: IPhone 6 cannot be turned on after dropping into water. Solution: 1. Remove the screen   and battery  and plug adjustable power supply  to energize it. The current is 60mA. When press the power button, the current stops at about 120mA. Remove all the shield covers  and find that some of capacitors of the main power supply PP_VCC_MAIN turn black. 2. Based on the circuit principle, we must figure out whether the electricity leakage is from the circuits of battery power supply PP_BATT_VCC or main power supply PP_VCC_MAIN. First we remove the field-effect transistor Q1403 that converts battery power supply into main power supply. The Q1403 in schematics diagram is shown in picture 1-1.

A client sends a message called "iPhone 5s battery gets hot when charging and it is not durable." This is a frequent occurrence for many phones, but few people know how to solve it. Now this article will tell you how to fix your damaged iphone 5s. All of tools you need will be found at vipprogrammer.com . PROBLEM: The battery gets hot when charging and it is not durable. Plug the charger to charge for half an hour, finding that the iPhone is very hot and the temperature is nearly 70℃. Turn if off at once and tear it down to test. SOLUTION: 1. First, replace the Charge Jack cable , but the problem is still the same. Tear down the motherboard  and measure each relevant circuit. 2. Measure the diode data to ground of each pin, such as charging tube Q2, USB Control chip  U2 and USB interface J7. We find that diode data to ground of pin 26th of USB interface J7 is abnormal which is larger than the normal one 20. The location of pin 26th of USB interface J7 in bitmap is

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This article will help you a battery issue on the iPhone SE, where in the battery drains so fast after dropping into water. Read on to learn what could have possibly caused your iPhone’s battery to drain quickly and fix the problem with a few helpful workarounds. These tools in this article that you will need are be found at vipprogrammer.com . Issue: Customer said his iPhone SE battery drained fast after little water got in, but after turning on it can be used normally. Solution: First: Tear it down and plug a adjustable power supply to offer power supply to motherboard . The standby current is 50mA, which suggests that there is electric leakage. After removing the PP_VCC_MAIN voltage and its Q2300, the problem remains the same. So the electric leakage does not come from PP_VCC_MAIN voltage. Q2300 in circuit diagram  is shown in picture 1-1. Second: Checking the circuits that connect battery power supply, we find that the power amplifier chip  at the lowest part of boa

If you come across this situation that your iPhone is on, but the screen is black suddenly. Your iPhone rings, touches, has voice but you can’t answer and open. You’ve tried resetting your iPhone, letting it run out of battery and plugging it back in, and your iPhone screen is still black. The black screen is usually caused by a hardware problem with your iPhone 5s. In this article, I’ll explain what you can do to fix it. The tools that you need: screwdriver suction cup opening tools Trouble Phenomenon: Customer said that his iPhone 5S screen  suddenly turns black when he played with it at night and it cannot be turned on since then. Repair Process: 1. We use a adjustable power supply to charge it and charger shows 4.28 A current flow (picture 1-1), which is an obvious shout circuit. Use multimter  to measure the diode data to ground of battery interface, which is normal. We continue to measure and find that the main power supply PP_VCC_MAIN is short circuit to ground.

If you come across this situation that your iPad battery drains while changing. Someone think this is an impossible question to happen. But it is really exist. So vipprog engineer sort out some guide to solve this question. The tools that maybe you use will find at vipprogrammer.com . Trouble Phenomenon: The customer said that his iPad 4 cannot get electons into its battery. During charging time, the charging indicator at the upper right corner has a thunderbolt in it to indicate it is charging. The battery indicator now says 77%, but after a few minutes, it dropped to 74%. Repair Process: 1. USB current voltage meter  indicates that iPad has current when the screen is on or turn iPad off, as shown in picture 1-1. 2. USB current voltage meter shows no current when the screen is off, as shown in picture 1-2,which suggests that there is no current flowing trough the charging circuit when the screen is off. 3. Use multimeter  to measure the voltage of battery pin BATT

Maybe every cell phone can experience the possibility of water damage, when you accidentally drop your iPhone 6, iPhone 6s or iPhone 6s Plus in water you can still save it. Whether it’s in the sink, toilet or pool, we’ll show you how you can recover from most iPhone 6s water damage problems. The iPhone 6s is not waterproof and even though the iPhone 6s can handle water better, it is not waterproof either unless you put a case on it. Trouble Phenomenon: The customer said that his iPhone cannot be turned on after dropping into water. He opened the front panel and cleaned it. There are some bumps on the upper cover of CPU. Repair Process: 1. Tear down the iPhone and connect the motherboard  with adjustable power. Let it standby but there is no current. We can be sure that the main power supply is not short circuit. Triggering it on, the current changes to 50mA and then it is power fail, but goes back to 50mA again automatically. It repeats the former process again and again.

Last week, a customer send a iphone 6s to vipprog, the iPhone 6 screen turns black after standby time lasts a little longer and it is unresponsive when press the power button. Now if you have this situation you can follow this guide, and the tools used in this article can be found online at vipprogrammer.com . ISSUE: Immediately turning on screen after turning off is workable, but after standby time lasts a little longer, the screen is unresponsive when press the power button . The iPhone has been repaired at other maintenance shop, but the problem is still the same. SOLUTION:  1. Turn on iPhone and enter IOS to test all these functions. The screen turns black after standby time lasts a little longer, which may be caused by faulty functional chips and interrupt signal of power. After functional test, we find that the compass cannot be used while other functions are normal. 2. Tear iPhone down and observe motherboard , finding that the compass has been soldered and other ch

When you come across this situation that your iPhone 6 Plus front camera（VC602） is unworkable and receiver has no sound. What can you do. Sometimes maybe we will choose give up, but if you know some phone repair knowledge you will get a new phone. Now vipprog engineer sort out some guides for fixing iphone 6 plus front camera and receiver issue. When you need phone repair tools, you can choose vipprogrammer.com , hoping you can benefit from it. ISSUE: Customer sent an iPhone 6 Plus motherboard . He said his iPhone has dropped into water, so the front camera is unworkable and receiver has no sound as well as the screen does not turn black during calls (cannot sense distance). SOLUTION: 1. Assemble the board to tester assembly and test, finding the front and rear cameras are unworkable, receiver has no sound, the screen does not turn black during calls and sound cannot be recorded. 2. Observing motherboard, we find that the touch assembly is fixed and there are jump wires . We do

The function of audio on iPhone are normal, such as receiver and hand-free all is normal.The calling is normal through earphones. The only problem is the sound from the microphone (on Charge Jack) is low. This iPhone has been changed audio frequency chip, audio amplifier and USB Charging Port Jack . So, what is the problem? Vipprog gave a guide. First, teardown the iPhone 6 by phone repair tools, and then remove the motherboard . We can see that audio chip and audio amplifier have been soldered, to be on the safe side, we replace the chip directly. Second, after changing the audio chip, the problem is still the same. We can exclude that Charge Jack and audio chip do not cause low sound from the microphone. It is the miscommunication between two microphones signal LOWERMIC1_TO_CODEC_P and LOWERMIC1_TO_CODEC_N and audio chip that cause that problem. Two coupling capacitors C0922 and C0923 are often broken. The location of C0922 and C0923 in bitmap is shown in picture 1-1 and th

Nearly every iphone owner who uses their device as a camera will come across the problem of iphone camera can't work. If you like selfie, it will affect your mood. Now this article will tell you how to solve the problem. ISSUE: IPhone 6 camera can shoot videos but cannot take photos and the flash light  cannot be opened. SOLUTION: 1. Checking the circuit diagram  of flashlight control chip U1602, we find that the power supply of U1602 is from pin D1, A2 and B2 (picture 1-1). Pin D1, A2 and B2 connect inductor L1605. Energizing iPhone and turn it on to measure the voltage of L1605 and it is normal. The material object of L1605 is shown in picture 1-2. 2. Then we measure the voltage of pin D2, E2 and I2C bus of light control chip . We find that the I2C bus of flashlight control chip is connected to CPU (picture 1-3) through bitmap and then to main camera socket J2321 through inductor FL2331 and FL2329 (picture 1-4). 3. Measure I2C bus voltage and the