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DIY Repair: The 5 Essential Tools For Smartphone Repairs

Smartphones play an increasingly important role in our daily life. Almost everyone will buy a smart phone, but when you use for some times, your new smartphone will becomes old and appears some problems. When something goes wrong with your smartphone, the most important thing is repair. Some simple problems, you can do it by yourself, now I will introduce essential smartphone repair tools to you. 
 





Read More: 2018 Buyer Guide: Best Mobile Phones Unlocking Flashing Tool

#1. Pentalobe Screwdriver

♦ The first tool, I will introduce the magnetic pentalobe screwdriver to you. One of the first challenges you run into when trying to complete smartphone repair is opening the device. 

♦ This magnetic pentalobe screwdriver is designed to remove the two screws at iPhone and smartphone bottom, it's very ease to handle, it will offer great performance to your repairs.

♦ Two option: One is cross head -- 1.5mm Magnetic Screwdriver for mobile phone, tablet, PC repair opening tool. The other is pentalobe head: 0.8mm screwdriver opening repair tools.

#2. Tweezers

♦ I will recommond this titanium alloy tweezers to you, it is the 0.15 mm high precision phone motherboard jump line repair tool. It is used for all soldering repairs, can keep long-lasting service for your cell phone repair.

♦ Two option: the TS-11 straight headed 0.15mm and the TB-11 curved headed  0.15mm.

♦ Its feature is high fine tip, anti-Corrosive, anti-Magnetic, noncorrosive, high precision and magnetic acid resistance. 

♦ It is very suitable for phone repair under a microscope, especially cell phone fingerprint Jump Line repair for Mobile Phone PCB Welding, wire copper soldering repair on cell phone motherboard, etc. 

#3. Plastic Spudger 

♦ The third tool that I want to introduce to you is phone plastic Spudger. It is cell phone repair opening pry tool, and it is very convenient to use for DIY iPhone, cell phones or tablet screen, case, battery housing teardown.

♦ This type has 2 kinds mixed plastic spudger ( Round + Square), Plastic spudger and triangle tip.



#4. LCD Screen Suction Cup

♦ The suction cup is important at the phone repair process. I will introduce this VIPFIX LCD screen suction cup, it is used for removing display on refurbished or damaged iPhone / iPad / Samsung or other cellphones.

♦ With this hand-hold phone LCD display screen suction cup on your side, you will be a step ahead of the operation when comes to completing an important and DIY cell phone repair.

#5. Stainless Steel Knife Set

♦ The stainless steel knife set is phone motherboard repair tool, It is used to assist your scraping, cleaning and cutting repairs on defective mobile phone or tablet. 

♦ The package list includes one handle and 10 pcs blades. Ten different blades, all-metal handle will become the perfect tool for when you're cutting, scraping, cleaning, or performing any other phone repair task that requires a sharp object.

♦ The knife set is individually verified for defects with strict standard, the all metal design of this Precision Knife Set ensures robust performance and long life.

These are 5 essential tools at your smartphone repairs process. If you need these set, you can try Vip Fix Shop Team


by VIPFIXPHONE




How to Diagnose Cell Phone Components and Parts Problems  

As a professional cell phone repairman, the most common repair is to diagnose problems by checking spare parts. By checking the parts, you can judge the faults by different symptoms. Beside necessary phone fix tools, the most important you need to know is what a complete cell phone including and how to give the specific solution to fix it. To solve problems, these cell phone components and parts you need to know: 





• Chip level components

Capacitors, resistor, diode, coil, boost coil, coupler, regulator, transistors, are rarely or not tested for fault. If there is any problems in the track of the cell phone motherboard then it is solved or fixed by jumper wire.

• Card level parts

Battery, battery connector, LED, Display, Display connector, SIM card, SIM card connector, memory card, memory card connector, microphone, vibrator, charging connector, headphone connector, data cable connector,   keypad button, keypad connector, camera, camera connector, ON / OFF Switch,  Internal antenna, ringer, PDA, etc. These parts you can replace new replacement to solve the faults.

• Common small parts

Coil,ringer, vibrator,  boost coin, On / Off Switch, Antenna Switch, RX Filter, PFO, BSI, Network IC, VCO, Audio IC, Power IC, RTC, Charging IC, CPU, R22, Microphone Interface, Bluetooth IC, Flash IC, RAM, Logic IC, UEM etc.

• Essential Diagnosis Tools

- DC power supply
- Digital multimeter



• How to diagnose the most common parts problems

- Coil: Check it with a digital multimeter on Buzzer Mode. If it is good then it the multimeter will give a Beep or Buzz sound. If there is no sound then the coil is faulty. Replace it with a new one.

- Resistor or Resistance: Check it with a digital multimeter on Buzzer Mode. If it is good then the multimeter will give a Beep or Buzz sound. If there is no sound then the resistor is faulty. Replace it with a new one.

- Capacitor: Check it with a digital multimeter on Buzzer Mode. If it is good then the multimeter will NOT give any Beep or Buzz sound. If there is sound then the capacitor is faulty. Replace it with a new one.

- Diode: Check it with a digital multimeter on Buzzer Mode. If it is good then the multimeter will NOT give any Beep or Buzz sound. If there is sound then the diode is faulty. Replace it with a new one.

- Speaker or Earpiece: Check the speaker / earpiece with a digital multimeter on Buzzer mode. Value must be in the range of 25 to 35 Ohms. If the value is in this range then the speaker / earpiece is OK and need not be changed. Otherwise, change the speaker / earpiece.

- Vibrator or Motor: Keep the digital multimeter in Buzzer Mode and check the vibrator, Value must be 8 to 16 Ohms. If the value is between 8-16 Ohms then the vibrator is good. Otherwise change it.

- Ringer: To check if the ringer of a mobile phone is faulty or damaged, keep the multimeter in buzzer mode and check the ringer. Value must be between 8 to 10 Ohms. If the value is between this range then the ringer is good and does not need replacement. If the value on multimeter is 4-5 or 12-14 then change the ringer.

- Microphone: Keep the digital multimeter in buzzer mode and check the microphone. Value reading on the multimeter must be in the range of 600 to 1800 Ohms. There will also be a Beep or Buzz sound from the multimeter. NOTE:  Please note that only one side of the microphone will show value. If we check by reversing the Red and Black Probes / Test Leads of the multimeter and check the microphone then there will be no value.

- LED: Keep the digital multimeter in Buzzer mode and check the LED. If the LED is good then they will glow otherwise not.

- Keypad: Keep the digital multimeter on Buzzer mode and check Rows and Columns or the Key Pad. If there is Beep or Buzz sound from the multimeter then Keypad is ok, otherwise it is faulty.

- Battery Connector: Keep the digital multimeter on 20V DC and check. Value must be 1.5 to 3.5 V DC.

- Battery: Check voltage with a digital multimeter. Keep multimeter on 20V DC and check. Value must be 3.7 V DC or above.

- ON / OFF Switch: Check voltage with a multimeter. Keep multimeter on 20V DC and check. Value must be between 2.5 to 3.7 V DC.

- Network IC: Use a Analog DC Power Supply to check. Switch ON DC Power Supply and call any number from your mobile phone. The Needle of the DC Ampere will start moving. This shows that the Network IC is OK and not fault.

- Power IC and CPU: Adjust voltage of the DC Power Supply to 4.2. Place the Red Probe / Test Lead of the DC Power Power Supply to the "+" of the Battery Connector of the mobile phone and the Black Probe / Test Lead to "-". If DC Ampere is over 6 then Power IC or CPU is damaged. Check by replacing Power IC and the CPU one by one.

If there is no movement of the Ampere Needle of the Power Supply then the Battery connector, On / OFF Switch Track, RTC or Network Crystal is damaged. Give heat to these components using hot air blower. If the problem is not solved then check by replacing them one by one.

If there is beep sound from the DC Power Supply then there is problem with "+" and "-" or the mobile handset is short.

If the Ampere Needle fluctuates below 2 ten there could be problem with software or RTC (Real Time Clock).

If the Ampere needle stands at some fixed point then there is problem with the Flash IC.

More cell phone diagnosis and solution guide please ask VIP FIX Shop Team for help!


by CNFIXPHONE





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