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Learn Cell Phone Repair

31 Jul 2018
The first step to entering in the business of cell phone repairing is to learn to repair cell phones. but the question is how? There are different ways to learn cell phone repairing: in this article, we are introducing the Offline Course of self-teaching by the book, as we know offline cell phone repair course is not a new option to learn cell phone repairing but its primarily because the self-teaching by book offers real hands-on repair experience and direct interaction with the instructor. Offline Study with the book is also focused and fast, covering the most important learning topics about the cell phone repairing over a specific period of days. and another benefit of Offline Learning is the validation by own, without wasting too much time for searching for a person who can teach you on his cell phone repairing store, which often comes in the form of a self-made that proves your expertise. It's one thing to say you're a cell phone repair technician. on hand practices on the cell phones according to book practical activities can bolster your reputation and help you land more, better, and higher-paying work to you in cell phone repairing business. even though most books offer the robust training. Books are Convenient, not expensive and can provide training for self-study. you can learn at your own pace and it can be good instruction. Books with troubleshooting, layout, block, and schematic training diagrams represent cell phone repair training alternatives for self-motivators who want to learn on their own. Though cell phone repair books you get provide instruction, there is no need of the instructor, and no certificate to be earned. if the author explains each topic in the book in depth.
The best part about cell phone repair book is that if they're good, they can serve as references for years to come; if they're bad, you've invested very little money and you can give your used books to help the peoples how cannot afford to pay for learning cell phone repairing in there country because it is so expensive for them.

Learn Cell Phone Repairing Offline

A Do-It-Yourself Guide To Troubleshooting and Repairing Cell phones
The book targets people who would like to start and run a cell phone repair as a business
Learn Mobile Phone Repairing

We all use mobile phones and we all have problems with it. Don’t get frustrated… and don’t waste money on support calls or costly repair! Solve the problems yourself, with this Learn Cell Phone Repairing book. Using easy-to-use flowcharts, handy “symptom tables,” and clear pictures.

this Learn Cell Phone Repair ebook is Using flowcharts, handy symptom tables, and clear stepbystep pictures
some of the book pages
This updated book contains the detailed content and out-of-the-box ideas to repair your own Cell Phone successful. this book provides you the information needed to become Cell Phone Repairing technician on your own. 

activity page of the book
The fill-in-the-blank activities format makes it very easy to test your self after reading and doing cell phone repair jobs. writing the experience that you get after repair your own cell phone with the help of this book will put you on the road to success. it features in-depth it also contains Helpful Resources, Best Practices to exploit knowledge and education about cell phone repairing to improve your chances for success in a Cell Phone Repair business.

Muhammad Asif Azeemi walks you step-by-step through identifying, solving, and preventing hundreds of 2018 most aggravating cell phones problems. Azeemi covers all your major platforms:

book index

hardware, software, and more. He even helps you fix the weird problems that happen when you use multiple apps together on your smartphone! help you with his knowledge about cell phones
identify and replace faulty memory chips prevent overheating that can damage your cell phone. make you sensibly decide whether to upgrade, repair, or replace your smartphone. in this Book on cell phone repairing by the end of reading and doing you should be able to disassemble and assemble a cell phone, use the correct cell phone repair tool to diagnose the problem, know the conventional parts of modern cell phones, learn cold testing, hot testing, jumper setting checking, identify cell phone faults and repair them with the help of proper tools.
Learn Cell Phone Repair book is provided through distance learning and we trust that you will find the material useful both for studying and for future reference.

21 Outcomes of Reading (Learn Cell Phone Repairing) Book in 2018

Upon completion of this book reading you will be able to:
  1. Identify different types of cell phones
  2. Difference between Feature Phone and Smartphone
  3. Recognise Potential Hazards Associated with Cell Phone Repair
  4. What is a hazard?
  5. Cell Phone Repair Tools
  6. Factors to Consider When Choosing Cell Phone Repair tools included cost, suitability, and quality of the tools
  7. Use the correct hardware tools to repair cell phones
  8. Assembly and disassembly of a cell phone
  9. Identify the parts of cell phones
  10. Parts of a Conventional Cell Phone
  11. Learn the Skills Needed to Diagnose and Repair a Cell Phone like:
  12. Testing using a multimeter
  13. The cold testing method
  14. The hot testing method
  15. Modern Cell Phone Jumper setting
  16. Soldering
  17. Desoldering and also examined the tools used for mobile phone repair
  18.  Diagnosing and Repairing Cell Phone Faults
  19. Hardware Faults
  20. Software Faults
  21. Identify cell phone faults and solve them
We welcome your feedback related to this book and wish you all the best.  Happy Learning!

About the author,

Muhammad Asif Azeemi has spent 15 years as a mobile repairing course instructor and smartphone repair trainer, helping thousands of people work more happily with cell phone repair business. He is the author of Book, Learn Mobile Phone Repairing in Urdu and he is the founder of Mobile Repairing Online. Asif is a Certified cell phone repair technician and also run his own mobile repair store in Karachi Pakistan.

Some Related free and paid Information :

Expertise in the mobile phone repair markets of urban and Bangladesh, outlining basic patterns of repair activities, identifying main repair sites read more

The Cellphone: The History and Technology of the Gadget That Changed the World, this book explains the fundamental concepts involved in wireless communication. you can buy it from Amazon

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Schematic Diagram for Nokia Mobile Phones

5 Jul 2018
Schematics are essential for Nokia mobile phones repair.  Unfortunately, in some countries is illegal to own Nokia mobile Schematic. They’re considered the proprietary property of the Nokia company that they belong to. In those countries, Although phone schematics are illegal to sell and distribute, there is the way to obtain these schematics online. if you want those schematics You just have to read this article start to end. Whether you have some knowledge or not about Nokia phones repairing, this article can be a very good guide for anyone around the world for downloading Nokia service manual free of cost. reading Schematic Diagram is not that difficult if you know basic electronic symbols.
Easy to read schematics all Electronics symbols most common electronic component
mobile components list
in my online sessions, I teach basic electronic theory and practical.
When learning how to repair a cell phone, it is important to identify These parts and components on the PCB
mobile phone components symbols details
If you know basic electronic component functions you can diagnose and repair faults on Nokia, iPhone, and Samsung mobiles. Looking for the book on Nokia phone repairing. Download those schematic diagrams for free to learn Nokia phone repairing. cell phone engineering can rely on this step by step Article on schematic diagram for success in the career of Nokia phone repairing.
In this Free to download Nokia Cell Phone schematic diagrams you will find following Nokia PCB diagram with IC(integrated circuit) names and description, layout diagram with electronics parts explanation and schematics for find faults and problems and how to repair any Nokia mobile of any series including 3310, 6210, 8210, 8250,1100, 2300, 1110, 1200, 2310, 2650, Lumia 900 n70  etc.
View and Download Nokia 6210 service manual online
Nokia 6210 Cell Phone Guide

Download Nokia 6210 free schematic here PDF
service manual

View and Download 8210 Nokia layout diagram here
free download nokia 8250 diagram

Free Download Nokia 8250 service manual online here
nokia 8210 free schematic

free download circuit layout diagram service manual now
Nokia N70 Symbian smartphone

nokia n70 mobile phone components identification & knowledge
hardware repair techniques
nokia 2300 ic solution diagram free download PDF manual
nokia 1100 pcb diagram
you can download this Nokia Schematic Diagram Complete PDF here

Phone Troubleshooting Diagrams Here you will find all Nokia official Schematic for educational purposes you will find all the information you need to read schematic diagrams used in the field of Nokia mobile repairing to describe customer intentions in your mobile repair processes and cell phone repair jobs.

Mobile Phone Diagram for Repair Nokia Mobile

The major focus of the mobile phone diagram for repair is on understanding the entire system by which the cell phone works. also having the schematic is useful for knowing common component frameworks in the mobiles, in the order to repair the new mobile phones, You will definitely need a schematic or solution diagram. when time to time knowledge of mobile phone diagram for repair grows, schematic diagram Author believes if you know the basics about how actually a mobile works, then diagnosing the problem and finding a solution for it will not be a big issue for you.

Cell Phone Schematic Author and Founders

The same founder of these schematics also provides an extensive phone diagram collection of schematics brands like iPhone, Blackberry, Samsung, Nokia, htc, Sony Xperia, Motorola, LG, China, Qmobile, Huawei most probably you need the schematic diagram to keep you up to date on each of the mobile brand's hardware knowledge.
PCB Diagram of Mobile Phone Free Downloading Websites

Most of us already know how to download free schematics from the internet. I am searching on search engines and they show me the copy of genuine diagrams are available for download you can find many mobile brands schematic diagrams on websites like and Here are some ideas on where to get schematics for most Nokia mobiles and for iPhone schematic its copy of genuine diagrams are for use as fixed cell phones and republished as a “phone diagram collection” posting a schematic diagram on websites create it more functional and more useful for cell phone technicians, in the beginning, seeing Nokia’s schematic is useful to the knowledge of cell phone PCB lines framework
Nokia Lumia 900 user manual online diagram for repairing function of integrated circuit
Lumia 900 PCB diagram
if you have a schematic for particular Smartphone brand repairing your cell phone troubleshooting time can be reduced to half! the schematic is shown you all the parts value, waveform, voltages, the explanation how your cell phone work, ic design, part symbols and etc. with the layout schematic you will be able to find the exact part value and finally repaired the cell phone.
Nokia 1100 2300 component layout and signal flow diagram PCB detailed troubleshooting methods
Nokia Any Diagram

There are many mobile diagrams for repair which can be tried on initial stages and problem-solving can be done without actual diagnosis. These cell phone diagrams have been explained in detail in the phone diagram collection ebook. the book also has the knowledge on the practical solutions to the problems of cell phones. Practice questions answer videos, layout diagrams, and easy to understand language makes learning process quick.

Mobile Phone Repairing Book Free Download PDF

Mobile phone repairing book has a comprehensive and detailed approach towards each and every aspect of cell phone repairing. If you wish to learn cell phone repairing in general or planning a career in cell phone repairing, this ebook can be of a lot of help to you. Detailed approach with diagrammatical illustrations and step by step instructions makes it a user friendly in the following countries Kenya, Ethiopia, Italy, Myanmar, Lithuania, South Africa, Canada, Australia, India, United Arab Emirates, United States, United Kingdom, Malaysia, Spain, Sri Lanka Nigeria, Mexico, Nepal
It is one of the best self-help ebooks available in the given category. Both beginners and experienced people can rely on the book for success in cell phone repair jobs. The reader will also get in-depth knowledge about Modern Cell Phone Practical Jumper Setting and all kinds of jumpering used to repair the cell phones. the knowing framework behind circuit saves you doing damage to cell phone PCB lines. This Nokia Schematic Collection of diagrams for latest Mobile Repairing PDF Book is free to download. make sure not to make any commercial use of the ebook. also, do not misuse the ebook. all material and content in the PDF Book is copyright of this website The PDF copy of the book is available on You can bag this book from mobilerepairingonline on your email in today by following a few easy steps.
Have a good day guys, we from team, we here want to help you find wiring diagrams on Nokia cell phones are you looking for, on this occasion we would like to convey the wiring diagram about cell phone circuit diagram book free download pdf. Hopefully, the pictures above wiring diagram can be useful
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Modern Cell Phone Practical Jumper Setting

8 Jun 2018
jumper setting is typically best when you need to connect two different points on a cell phone there could be internal disturbances in the circuit of the handset which are connecting these two points and
because of the internal disturbance or a breakage in the circuit, the father or data may not be traveling
from one point to the other easily and in those cases, we use jumper setting to try and connect those two points directly thereby ensuring the correct transmission of power, data, and piles voltage from one end to the other end but in order to determine whether you need to do jumper setting.
for example, if you're checking a battery connector you may need to first verify whether the battery connector is working properly or not before you decide to make any changes or test any connections on the cell phones

Tracing & Testing VCC main and GND points of a iPhone PCB
removed all the suspect caps on vcc main but still shorted. wanted to try freeze method, but don't know where to put power
iphone 6 battery connector

now in this iPhone, the first aspect that we were going to be checking is the connectivity between the battery connector and two other important basic electronic components that transmit power to the rest of the circuit of the cell phone now in order to test out the connectivity in the phone PCB you need to use the multimeter!
what do multimeters measure? how to use multimeter to test continuity
best multimeter for home use

if you don't know how to use multimeter check read this article first what do multimeters measure? how to use multimeter to test continuity
place the multimeter switch range on the Buzzer continuity testing mode to check whether the two probes are connected things the means a
7 Function Digital Multimeter Leads Electrical Circuit Test Meter Detector Tool
multimeter probe types
and you can hear the beep and once you hear the beep the multimeter is perfectly alright let's go ahead and test the connectivity on the board now typically we are going to be starting off with checking the battery connector

Step 1 Check Shorting on Cell Phone Battery Connector

check shorting on cell phones with multimeter We can easily check whether there is shorting in the circuit board
positive negative bsi 
Battery Connector connects the battery positive and negative to the mobile PCB internal plus and minus copper wire prints. if you don't know how to check Shortage on cell phone circuit from the battery connector read this article how to fix a short circuit iPhone

Step 2 Checking Cell Phone PCB Ground Resistance with a Multimeter

you need to identify the positive and the negative points on a battery and we already know that the negative point on the battery is what is the background connection as you see the yellow color line is the GND line of the battery that is traveling all through the mobile PCB so let's keep the probes on one end and connected and now we can hear the beep this basically means that the battery connector negative point is here. if two GND points are connected you will hear the beep sound if not you will not be able to hear a beep sound in these points by segmenting the entire negative line into smaller parts you will be able to exactly trace where the breakages in the entire negative line once the breakage is identified you will then need to use the jumper setting option and try and ensure that the wire is or the circuit is reconnected and is properly functioning
When we check the value of resistance using the multimeter is connected to the ground of the mobile PCB
ground testing

to know more about Ground Line in cell phone PCB read digital multimeter step by step guide article last paragraph

Positive Line VBB or VCC Main in iPhone PCB

now this is how we check the negative line now let's move on to the next part which is a positive line now a positive line cannot be very clearly seen like the negative line the positive line is typically connected to very specific components or ICS and supplies power to each of those components so it's not very easy to identify and it's not open unlike the negative line hence you need to ensure that you are able to trace the positive line effectively after reading through the circuit diagram of the respective iPhone PCB

Mobile Jumper Circuit Diagram Download

unless you have an iPhone Circuit Diagram in hand you may not exactly know how the positive ways is weaved it into the iPhone PCB or into the specific components of the Printed Circuit Broad so please ensure that you pick up their respective surface circuit diagram of the while phone that you are working on understand the VCC main connections that exist in it and then try and trace the connections

+VBAT(battery voltage) on Cell Phone PCBs

now one of the common things that we can do to check the positive ways is to touch the positive terminal +VBAT of the battery connector to this layup capacitor now this component is a very common component that you will find in most cell phone PCBs and this is a common place where the positive ways is usually connected you may be able to identify that in different cell phone PCBs 
check the positive ways is to touch the positive terminal +VBAT of the battery connector
capacitor on mobile PCB

to know more about layup capacitors in mobile PCBs visit How to Check Layup Capacitor in All Cell Phone Circuit
battery voltage +VBAT on Cell Phone PCBs
mobile battery connector pin

once you identify and able to detect that you will be able to touch the positive direct ways in the PCB the positive connector of the battery a connecting point to the specific non polar capacitors, resistance and other components and you can check whether the direct positive ways is intact or not that if there is a breakage here you may not be able to connect or connect the jumper wire from the battery connector VBAT

Step 3 Checking +VBAT(battery voltage) in Cell Phone Circuit

use the back end of the cell phone battery connector as you can see here in the pictures
there's a small point at the back of the battery connector which is connected to the front of the battery connector check whether you are able to get a beep sound
back point is connected to the power point
there's a small point at the back of the battery connector which is connected to the front of the battery connector so you place the one end of the meter prob tip on the back side of the battery connector point and the other on the other connecting point in the pcb and check whether you are able to get a beep sound now here you will be able to connect the jumper clearly without any issues like I just said before in the article the back point is connected to the power point you can hear the beep and from here you can connect the jumper wire to the next point for you to be able to take the positive ways ahead but you need to ensure that you read the phone circuit diagram clearly before you attempt any of this 

phone circuit diagram clearly the first step that you would do while you're testing or tracing the negative and positive ways in a cell phone circuit
power supply system in phone
so, in short, the first step that you would do while you're testing or tracing the negative and positive ways in a cell phone circuit is to understand whether the power supply system in tact and to check

if you want to learn testing or tracing the negative and positive ways faults in iPhone, Samsung PCBs take admission in smartphones problem and their solutions course   

Checking VBAT and GND both Power Supply in Your Cell Phone PCB

check whether the connectivity to the components are then the entire circuit power supply in your cell phone checking can move to further detailed
pcb diagram of mobile phone
that the first thing that you would do is check the negative line(GND) or ground which is signified by the yellow strip that you see all through you can place the probes of the multimeter at two different points or smaller segments of each of these and try and see if the connectivity is intact once that is done you can move on to the positive terminal VBAT of the battery connecting point and try and place it at the respective positive terminals of each of the components to check whether the connectivity to the positive terminal from the VBAT of the battery connector to the individual positive terminals of components are intact or not if these two are intact then the entire circuitry power supply in your cell phone is working absolutely fine once you do this checking you can then move on to do further detailed

Cell Phone Power Section

The top portion near to antenna of the cell phone circuit is called the networks section, and the bottom portion in the PCB is called the power section. Now check the cell phone power section polar and non-polar capacitors, coils, or the power clock oscillator function-specific components near the power IC when cell phone won't switch on.

What Do You Do When a Smartphone Won't Turn On?

in a smartphone, this is a common issue. to fix this in smartphone try to long press the Power Button. in many cases, the power button won’t work because the phone is basically frozen or Historically, the solution is to remove the battery, wait for 10 seconds, then reinsert the phone battery and press the power button again. This removes all the power internally form the smartphone circuit. first, try this to fix the problem. just hold down the power button for ten seconds. If this method doesn’t work, try to press the power button for a bit longer. ten seconds should be suitable for most smartphones, Many smartphones have a method to restart usually by holding down specific keys or buttons on the phone. Much like the Sony Experia and Motorola battery pull where you hold the volume down key and power key simultaneously while the mobile is powered off. Try using a laptop or car charger instead can put a quick charge on phone battery and get it to respond as well. If you have tried these methods and phone isn’t responsive due to its battery drained 100% Try charging it using a battery booster(12 volts DC adopter with Ampare) this device is used to boost mobile phone batteries if you don't know how to use this device to fix the dead cell phone batteries read digital multimeter step by step guide article DC Current Measuring topic.
phone power on after boosting the battery with the battery booster
phone turn on vibrate
If smartphone power on after you boost the phone battery with the battery booster, but boot process fails,
the android phone is freezes on the startup screen, or it immediately reboots or shuts off there is a problem with phone software
stuck on logo samsung
the phone is freezes on the startup screen, or it immediately reboots or shuts off there is a problem with device’s software. In this case, you have to perform a factory reset of your Android smartphone form recovery mode. Note that will erase the data of customer phone to reset it back to phone default software state. you can also use this method when someone smartphone is unusable due to crashing or freezing software.
to perform the factory reset from recovery mode turn the phone off  then boot it up with one of the following button combinations:
Hold Volume Up + Volume Down + Power.
Hold Volume Down + Home + Power.
Hold Home + Power.
If none of these button combinations work, try performing a Google search by typing android phone name and hard reset keys to find the correct key combination of customer device. for example
(Samsung s3 hard reset keys)
perform a factory reset of your Android smartphone form recovery mode
android boot recovery mode
press the key combination until the Recovery mode option appears on the phone screen.
Note that will erase the data of customer phone to reset it back to phone default software state
samsung factory reset code
then Select the wipe data/factory reset option.
Choose wipe data/factory Reset option using volume keys and hold the Power button to enable
performing hard reset
Select the Yes to continue.
If your phone is screen locked you can do a Factory Reset Select the Yes to continue
hard reset screen
if smartphone refuses to switch on normally after performing hard reset try to flash it.
you can't enter into the menu with your google account or if you have a problem with the OS
refuses to switch on normally
if smartphone refuses to switch on after flashing it may be broken inside. then performing a Google search by typing android phone name and service manual to find the phone schematic diagram. then check VBAT and GND both Power Supply in smartphone PCB with the help of the schematic diagram.
I think to learn about jumper settings and how do we do the jumper settings on phone PCBs one article is not enough for you to understand the process for identifying where the circuit is broken in the negative and positive line of a mobile PCB in Dead, Not Charging, Battery Consumption, Auto-Off, water Damaged, Fallen Damaged, NO Vibration, No Tones, No Network, No Ear speaker Voice, No Mic Voice, LCD Disappear faults.
I will tell you those faults step by step jumper setting  in my next article so keep visiting my blog,
I hope you would have understood how to test positive and negative power supply in your cell phone PCB and we hope that you will continue to keep learning more about how to repair cell phone prints
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Digital Multimeter Step by Step Guide

23 May 2018
hi, I am sure all of my blog reader understand that in the field of mobile phone repairing multimeter is a very the important tool without a multimeter you will not be able to measure anything in the field of the cell phone repairing so come let we try and understand how we can use the digital multimeter to measure AC current and DC voltage and how we can check basic electronic components

Digital Multimeter Function

the device you can see in the picture is a digital multimeter. the reason why we call this a digital multimeter is that of its measures and gives you the results in the form of digits as you can see in the picture
digital multimeter measures gives results in digits is more accurate measure current
introduction definition
the digits are very clearly displayed on the picture and that is one of the reasons why this is called a digital multimeter because digits will help you understand the results of whatever you are checking very easily
digits clearly displayed help you understand the results
accurate reading in digits

Multimeter Probes
two probes specific positions in the digital multimeter to placed at a point written ohms and Com
probes place diagram
now, first of all, you need to understand what probes are as you can see there are two probes which are commonly used with analog and digital multimeters the first one is a black colored one the second one is a red colored one 
two probes commonly used with analog and digital multimeters black colored red colored
red black probes
and these two probes have very specific positions where you need to place them on the multimeter now the first one is a black probe now the black probe has to be placed at a point where it is written as Com which basically signifies a common range so the black probe has to be placed only in the common range 
place it there and press it will fit in tightly there see a symbol written voltage ampere ohms
measure electronic components
place it there and press it and it will fit in tightly there right above that  you will see a symbol where it is written as voltage-ampere M a this is where you take readings of voltage-ampere etc and you place the red probe here press it tightly so it can fit in right above that is another point where you can check higher values of electricity with the meter however commonly in a multimeter we normally use the red and black probes and that is more than enough to measure a lot of the electronic components. Right now let us try and understand what are these other readings that are displayed on the multimeter

Direct Current and Alternating Current Voltage Checking

now on the left-hand side top, you will see something written as V followed by a dash and a few dots there now this is the symbol for DC so on the left-hand side basically when you turn the Range Switch to the left you will be able to check the DC voltage somewhere ranges in the where
left-hand side top written as V by a dash dots the symbol of DC Range Switch
check DC voltage here
the range is between 20 volts two thousand words so you can check DC voltage by placing the Range Switch at the respective voltage point if you have a smaller voltage to be checked like cell phone battery you can place it at 20 volts

DC Current Measuring

now let's try and understand how we can check DC we are going to be using a battery booster to test this so we switched on the 12 volts DC adopter with Ampare 
digital multimeter how to use testing voltage on 12 volts DC adopter with Ampare
for repair cell phone battery
this is a device that is used to boost cell phone batteries and we are going to connect the output wire of this to the probes and we are going
boost cell phone batteries connect the adopter output wire to the battery terminal
boost mobile phone battery
to be testing the voltage of the output now we connect the two output wires of the booster to the two probes of the multimeter make sure that you connect it to the right and so the black and the
how you do your measurements of  DC voltage on mobile phone battery
three point eight volts
black red in the red and you can see this is around three point eight (3.8)volts so this is the DC voltage that we have measured and you can measure DC voltage by placing it at the Range Switch at the right position on the DC voltage set so whenever this is typically how you do your measurements of AC and DC voltage
switch off multimeter battery inside gives the power to display the digits on the reading scale
meter digital
whenever you are done with using the multimeter please switch it off because typically all these multimeters have a battery inside them so the battery is what gives the power to the multimeter to display the digits on the reading scale so if you beep it switched on the battery can drain off very easily and you may not be able to use it when you need it on the right-hand side, you see something like a V followed by an ampersand sign now this is where on the right-hand side, you check the AC voltage requires 200 volts or less requires the Range Switch to be placed at the 200 volts points higher value equipment can be measured using the 750-volt point so these are the two most important ways of measuring AC and DC voltage using a multimeter the range is between 200 volts to 750 volts
how ac voltage is measured check ac voltage with a digital multimeter
range switch of ac
Use Our Definitive Best multimeter Review try before you buy what is a multimeter used for Video specifications 2 Best Multimeters of 2018 Top Picks for Cell Phone Repairing

AC Current Measuring

now let's try checking at home typically the voltage that we have is between 120 or 230 volts we will turn the range switch now and place it at the 750 volt AC point and we will connect this to the main power plug to check the voltage now in many of the houses is between 220 volts voltage is usually available at the circuit boards electricity at your house and whenever you want to check whether you are getting the right voltage or not you use the multimeter place it place the Range Switch at the 750 volt position and we try and place the two probes in two points on the plug point you can see
use a multimeter to test voltage of live wires measure voltage at home
measure ac voltage with a multimeter
the wires are being plugged in into two points on your plug point and this is exactly where you get 120 to 230 volts once the probes are placed there and as you can see we can see the reading here it shows 120 now going further down you will see a few more micro readings on the right-hand side which is for smaller readings that can be measured using the multimeter, however, let us focus on those readings that are very important that we commonly use using a multimeter so let us go ahead and try and understand a few more checking cell phone components checking cell phone basic electronic components at multimeter ohms now right below the DC voltage you will see a few ohm reading is given there
Range Switch to check the value of resistance when you check cell phone basic electronic components
understanding ohm readings
this is where you place the Range Switch to check the value of resistance when you check cell phone basic electronic components (resistance) which ranges from 200 ohms to 2000 kilo ohms and that is how you turn the Range Switch there you can place it at the respective point and check the resistance value

what is SMD polar capacitor and How to check Non-Polar Capacitor with the digital multimeter click here

How Do You Check Continuity Beep on Cell Phone PCB

this point is called the buzzer or continuity testing in digital multimeter
test continuity
the next one that we will understand is where we the continuity or beep testing comes now this is a very essential component when you do when it is an essential test when you are doing tracing or testing of cell phone PCBs or laptop motherboard for that matter this reading or this point is called the buzzer or continuity testing
how to use digital multimeter for mobile repairing the probes together you will hear a beep sound
multimeter red & black probes
when you place it here and that's the probes together you will hear a beep sound now the beep sound is very distinct here but let us try and understand what is the reason behind this beep sound
Q: why do we use this continuity test now the reason why we do this beep testing?
A: when we are checking a wire and we want to check whether the wire is broken in between typically broken wires are called open wires so if you want to check whether the wire is broken from inside now you will not be able to find it out looking at it from the outside so in order to check the continuity we use the beep or continuity testing

which means you touch the two ends of the probe using the two ends of the wire using the black and red probe and if you hear a beep sound which means that the circuit is not open the wire is proper but if you don't hear a beep that means that the circuit is broken somewhere and you need to fix it
this is also used while doing tracing on a cell phone printed circuit board to check whether two points are connected properly

How Do You Test and Trace Prints on a Cell Phone PCB

how to test or trace a Prints on a cell phone circuit system using multimeter
testing power supply in prints
Now we will try and understand how we can test or trace a Prints on a cell phone PCB circuit system testing or tracing in a PCBs essentially is to find out whether the power supply is properly reaching different parts or components of a cell phone and as you all know we will be using the digital multimeter to try and test this whole process so once we switch on the multimeter we place it in the beep or continuity testing position and we will touch the probes to check it up if we here the beep which means the continuity testing position is working perfectly and the probes are in proper condition using these probes we will be able to test the circuitry in a cell phone PCB

The Ground Line in Cell Phone PCB (GND)

so, first of all, we will check the negative line in a cell phone PCB as you all know a power comes with a positive and a negative line, a negative line is what is also called a ground line or the baseline and this is signified by the yellow strip that you see all across the phone PCB
the negative line in a cell phone PCB also called a ground baseline signified by the yellow strip that you see all across the phone circuit
GND in mobile circuit
so this entire yellow strip that you see in the picture right now brightly colored strip is what signifies the negative line on the cell phone

How to Measure Ground Resistance with a Digital Multimeter

How much resistance should a ground wire have to Measure Ground Resistance
testing ground resistance with multimeter
in order to test this negative line, you can place the probes tips in the multiple points across this entire circuit and check whether the continuity is intactor not so let's try and first check the probes and try and start off with the tracing of the negative line in all Phone PCB so every board typically will have a very prominent line like this the negative line or the grounding line as we call it in order to test if you place the probe on any 2 on the grounding line and you can hear the beep so when we do this testing you'll be able to check whether the circuit is broken at any point in time if it's a closed circuit which means it's perfectly all right all the points are connected very well and the negative line is intact if it's an open circuit you will not hear a beep sound when you place the probe at the respective point.

so as you can see in this deep article on Top Multifunctional Digital Multimeter we tried understanding what a digital multimeter is how the probes work where the probes need to be placed how we can measure AC current and DC voltage, live wire testing and continuity testing check Ground accurately on cell phone circuit board going forward we will collect a lot more information about how we use this tool in different streams including iPhone repairing electronics thank you very much for reading

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Micro Soldering Repair Training

30 Apr 2018
This is the basic skill for a show you the tips and techniques of the skills involved with your mobile phone repair jobs today will going over the basic and advanced skills of Micro soldering. There are many kinds of mobile phone circuit soldering, but this article is designed to teach you the basics to advance smartphone and iPhone logical broad soldering. most repairs require you to have basic tools like a screwdriver or a sponge and others might involve more exciting tools like a soldering iron.

Now Review the Tools for Soldering Microelectronic Components

Soldering Iron: A soldering iron is a pen-shaped fine tip that heats up. one of the ways soldering irons is measured in the electrical and electronic market by is wattage. for laptop and smartphone electronics components work, a low-power iron 35 watts is used. Some irons are temperature-controlled, running at a fixed temperature in the same way as a soldering station. For most basic soldering, a 35 Watt soldering iron will work without any problems. but it is also possible to buy advanced solder stations where you can set the tip temperature with a dial or knob.
Mini micro Soldering iron help mobile technician to do iPhone solder
soldering iron tips amazon
Iron Tip: Most electronics soldering iron and soldering station have interchangeable tips, the iron tip is also known as the bit.
cleaning soldering iron tip step by step best information for students of mobile repairing
also known as the bit
Apart from Micro soldering tools, you may also need few other tools like sponge, iron stand, safety goggles, PCB holder, solder wire rosin core, desoldering wick remover wire and soldering flux paste. how can you actually use this?
get familiarity with soldering tools and methods of smartphone repairing
mobile repair tool list

Sponge: Something with which to clean your tip like a wet water sponge or a wet cotton
wet water sponge can be used to cleaning the iron tip
iron cleaning tool

Iron Stand: A soldering iron stand is used to keeps the hot iron tip away from burning flammable materials when you set the soldering iron down after soldering. iron stand purchased separately with 30 to 40watts soldering irons, but most budget higher end soldering models include the iron stand.
soldering iron stand used to keep the hot iron tip when setting solder iron down after soldering
purchase separate

Safety Goggles: Especially if you're the beginner, you should be wearing safety goggles
beginner should wearing safety goggles before soldering work on iphones
safety goggles amazon

PCB Holder: Suitable for fixed maintenance of smartphone circuit board and small essential for mobile phone maintenance easy to use, make your repairing work smoothly.
easy to use make your mobile repairing work smoothly
maintenance circuit well

Solder Wire Rosin Core: For a good solder joint between two components, you need the best quality of solder wire. solder wires are available in different diameters.solder wire rosin core is the most common and widely used solder wire.
the best quality common and widely used solder wire
solder joint between components

Soldering Flux Paste: Apply a best quality solder flux on the area of the leads of microelectronic components to be soldered. soldering flux paste will help to remove any deposited oxides from the surface of the microelectronic metals thus leading to better solder joints.
leads of microelectronic components soldering flux paste will help to remove any deposited oxides from the surface
try better-sold joints

what is soldering and why we do it?the best answer

Soldering is a method of connecting electronic component and its copper print on a PCB together by melting another filler metal in between them
best definition
Soldering is a method of connecting electronic component and its copper print on a PCB together by melting another filler metal in between them.Why would you need to join two copper layers together? Typically the common uses of solder are when a copper wire or component print gets cut and needs to be "fused" jumper back into the circuit.
Now we have all the tools we need to start doing soldering by hand so let's jump into it right now. The best part?
Cleaning: When the iron tip burnt flux accumulated on it, solder no longer wets the iron tip,
solder not wets on the iron tip problem solution by MRO
flux on solder wire don't get wet
then impending heat transfer and making soldering SMD components with soldering iron difficult or impossible.
periodically soldering iron tip not work well
iron tips problems
the tip must be periodically cleaned when using. Such problems happen with all kinds of soldering iron tips, A wetted water sponge or cotton can be used to wipe the tip for more aggressive cleaning

for aggressive iron tip cleaning used wet water sponge or cotton
move the tip at a sponge
Iron Tip Care and Maintenance: For soldering iron coated with a thin of solder.allow iron for transfer the heat to the workpiece on the PCB.This procedure is called iron tip tinning.
The tip must be coated with a shiny layer of solder by occasional wiping and applying solder directly to the tip
care thin of solder
Desoldering Wick Remover Wire: Desoldering wick wire is used to remove excess solder from the component tracks and mobile phone PCB.Wick Remover Desoldering Braid Wire is also used for Suck solder form BGA iC prints.
In a mobile circuit, desoldering Wick Remover Wire is used to a removal of solder and components from a circuit board for troubleshooting, repair, replacement
Solder Removal

Hand Soldering and Micro Soldering Just Arrived Information

learn pen iron how to quickly and efficiently do soldering
practical guide
Hand soldering is done for repairing of faulty mobile printed circuit boards and components. sometimes repairing and replacement of SMD components is also done by hand in mobile repairing jobs.hand soldering basic is done during PCB rework in a production unit when a smartphone PCB gets smash crash hand, soldering is also done for repairing and servicing printed circuit boards by the mobile technician. hand soldering is useful when replacing components on PCB with other PCB.
the microelectronic component is any basic discrete device or physical entity in an electronic system These leads connect to create a mobile electronic circuit with a particular function
what they do
Smartphone and iPhone basic electronic: Smartphone motherboards, tablet, Mac, iPod, iPad, and iPhone logical boards are filled with basic electronic components, many of these components such as coils, resistors, capacitors, and FPC, LVDS connectors are specification different models and brands. sometimes those components get failed due to water damage or phone dropped by the customer's basic electronic get disconnect from the copper prints.When these components disconnected from the iPhone logical broad or have been damaged by the user then you will need to perform micro soldering repairs.
Demonstrate how to sold micro components with the soldering iron: Make sure the soldering iron is hot. Do not touch it. Hold the soldering iron properly in one hand and component on the other hand with the help of tweezer. Maintain proper angle between component and PCB. by joining two surfaces allows the DC current to flow from one component to another microelectronic by print. Place the component at the copper track on the PCB with the help of the tweezer.
easy step by step free soldering techniques to help students
works quickly 
Apply heat where the lead of the component meets the copper track on the PCB. and hold the component with the tweezer.
Apply heat component meets on the PCB hold with the tweezer
step two
use solder wire if needs.
learn how to do the best solder joint with iron bit
step three
Flux and Solder Paste Residue Remover for Smartphone PCB and BGA Repairing : when you finish soldering, do you find there is solder flux residue on the PCB? The flux residue is not easy to remove by brush. It is important to buy best quality PCB cleaner liquid as poor quality cleaners can damage the board prints.
The solder flux residue is not easy to remove by brush the best quality PCB cleaner liquid cleaners used to clean the board prints
micro soldering flux
Anti Static ESD Brush for Cleaning Mobile Phone Tablet PCB BGA Repair Soldering: Antistatic brush is best for cleaning all Dusting and Dirt form sensitive components and FPC connector with safely. suitable for cleaning, washing and removes any liquid from the surface of iPhone and Samsung mobile phone PCB.The brush cleans those areas which are hard to reach in PCB, with its long handle and soft hair brush are easy to use.
Anti static brush is best for cleaning all components and FPC connector with safely removes any liquid from the surface of iPhone and Samsung mobile phone PCB
Cleaning Mobile Tablet PCB
that's not all...
You can also use soldering tweezers iron an advanced tool for soldering, resoldering basic electronics

For soldering and desoldering small surface-mount components like resistors, polar or non-polar capacitors, and Zener diodes, tweezer style soldering iron can be used, with two terminals and free-standing or controlled from a soldering station. soldering tweezers iron is also called tweezer soldering iron SMD. The tweezers have two heated tips applied to the two ends of the PCB component. The main purpose of the soldering tweezers is to melt solder around the this new era of smartphone repairing at your mobile repair shop, you need to perform micro soldering repairs at the microscopic level.
The tweezer soldering iron SMD have two heated tips can applied ends of the electronics component
micro soldering tweezers

remember one thing the best solder joint should look shiny. the backlight fuse is a commonly replaced component in every single Apple motherboard backlight fault. SMT (Surface Mount Technology) IC soldering method is different. the solder joint quality depends on the soldering tools you used. The better the quality of tools the better you get a result, the better will be the life and performance of the smartphone after repair.

Micro Soldering For iPhone Cell Phone Mobile SMT Repair Right Now

With the latest tools and the right knowledge, it is possible to repair costly iPhone, Samsung, and tablet motherboards at the component and chip level. This process is called “micro soldering” Once you are ready with all the tools needed for Micro soldering, you are ready to start the iPhone repair job.
teaching the essentials of soldering help readers gain familiarity with soldering tools and methods
micro soldering training

iPhone Board Level Repair: So, what does it take to learn hand soldering microelectronics and component level repair? The best place to start is with the micro soldering flux and soldering micro resistor. start by making sure the iPhone logical broad and the leads of the components are clean and free from any dust or grease. microelectronic components which are not clean may have deposited oxides that can lead to the bad solder joints.
iPhone Board Level Repair start soldering micro resistor component leads solder joints
micro soldering flux clean microelectronic

What is Micro Soldering Jobs?

microscope initial examination for doing small components micro soldering repair jobs
soldering micro circuits  advance level
During your repair process, you would perform an initial examination of the device motherboard, inspect for damage externally, then proceed to view the board with the components under a microscope to see problems.anything repaired and soldered under a microscope would be also considered "micro soldering jobs". the iPhone logical broad components and IC's get to a smaller size often times a soldering on micro circuits is needed, typically working with the smaller components using standard tools is very difficult. you can’t learn to solder all microelectronics without a microscopic. In this article, we will go over choosing a best microscopic and tweezers iron, as well as everything else you will need to learn micro soldering jobs and take your smartphone repair business to the next level.let's suppose you are earning an average $70 per repair on a cell phone and you do 10 FP(feature phone) repairs each week, that’s revenues of $700 weekly. when you do SP(smartphone) repairing you can earn an average $90 per repair on a smartphone, tablet, Mac, iPad, iPod, and iPhone logical boards by micro soldering repair. your weekly business revenue percentage can increase 100%
microscope provide eyepieces magnification see best components FPC connectors used microscope  different zoom magnified view
hand soldering micro electronics
Microscope with Magnifier: Microscope used to see a magnified view of Device PCB, FPC connectors or microelectronic components.with the microscope can easily see and work with iPhone and other smartphone motherboards, generally, eyepieces provide with the microscope to see the magnification. magnifier available in different zoom options. the best quality microscope eyepieces can be swapped for higher or lower magnification.There are different attachable light sources available for a microscope as well.Ring lights source can attach to the bottom of the microscope and provide lighting around the workspace.
microscope light sources in the bottom of the microscope provide lighting around the workpiece
microscope smartphone magnification view 
you can add a camera to your microscope. the camera is a great way to showing customers exactly what sort of repairs need to be made on there smartphone circuit as well as teach other technicians logic board level repair.The most important feature of the microscope is the glass.microscopes can be connected to a computer LED.
scope sharpest and clearest view form Amscope and Nikon lenses for doing micro soldering work on motherboards of smartphones
camera view feature
you can found sharpest and clearest view form Amscope and Nikon lenses.In practice, the scope it’s fine for all smartphone mortherboard micro soldering work I’ve done.

I hope all of the above board level repair step by step picture help was useful enough to explain Micro Soldering Repair. If you have any question then feel free to ask via comments below

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