How To Use DC Power Supply in Mobile Repairing, A Complete Step by Step Guide with free PDF. read the full post to learn the tips and tricks to repair mobile phones and smartphones.
hi, today I'd like to answer a very common question I get from beginner mobile device technician to my mobile phone repair class which is a, how do I use a DC power supply to power a cell phone? why would I want to use a DC power supply to check and find the faults in feature phones and smartphones? well this information year 2021 is written to teach you how to use a dc power supply stay tune
let's start with the why there are two answers for the Y the first answer to why I would use a DC power supply mobile repairing to power where the cell phones are that this R.s 300 mini power supply
that you would buy on mobile malls here in Asia it's pretty flimsy they died fairly often and especially if you're doing what we do which is plugging them into liquid damage mobile devices or Android and Mac devices that have short circuits you're bound to go through a lot of these and it gets tiring after a while to continuously spend R.s 300 on something that breaks.
Don’t have time to read the whole blog post right now? Get A Free PDF Copy Of This DC Power Supply Page: Get Updated information on DC Power Supply 2021. if you want to Go Further in Hot testing this PDF Document on How To Use DC Power Supply in Mobile Repairing & how to use dc power supply for cell phone repair will help you a lot!
hi, today I'd like to answer a very common question I get from beginner mobile device technician to my mobile phone repair class which is a, how do I use a DC power supply to power a cell phone? why would I want to use a DC power supply to check and find the faults in feature phones and smartphones? well this information year 2021 is written to teach you how to use a dc power supply stay tune
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fault tracing principles |
let's start with the why there are two answers for the Y the first answer to why I would use a DC power supply mobile repairing to power where the cell phones are that this R.s 300 mini power supply
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mini nonadjustable |
that you would buy on mobile malls here in Asia it's pretty flimsy they died fairly often and especially if you're doing what we do which is plugging them into liquid damage mobile devices or Android and Mac devices that have short circuits you're bound to go through a lot of these and it gets tiring after a while to continuously spend R.s 300 on something that breaks.
Don’t have time to read the whole blog post right now? Get A Free PDF Copy Of This DC Power Supply Page: Get Updated information on DC Power Supply 2021. if you want to Go Further in Hot testing this PDF Document on How To Use DC Power Supply in Mobile Repairing & how to use dc power supply for cell phone repair will help you a lot!
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how to use dc power supply for cell phone repair |
No worries. Click Here so you can download a PDF copy of DC Power Supply Digital For Mobile Phone Checking so you can read it when it’s convenient for you
The second as to the why is that by using a DC power supply I can intuitively tell exactly how much power the smartphone is using so for example:
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cable connecting examples |
I've hooked up a DC power supply connector to this the smartphone that I have down here and as you can see at 3.8 volts I can see that this phone is pulling 200 amps and as you can see in a picture
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practical knowledge |
the amount of Amperes a phone is using can very often be as a link to the type of problem it's having the same way that a doctor is going to tell if you have a niche over here you may have this illness if you have this temperature with your fever you may have this illness that's the same thing here oh if this IC integrated circuit is bad if the phone may be drawing this many amps if that integrated circuit is bad the device may be drawing that many amps it's a way to kind of try and narrow down what's wrong once I realize that there's a pattern every time this IC is blown the phone is drawing this many amps I don't have to go through and repeat that same troubleshooting process every single time I can just go huh the last five times it was drawing 58 amps IC a was corroded so when I see it's drawing 58 a mess rather than spend 30 minutes troubleshooting I can check integrated circuit a within the first minute and bam I have a solution to my customer phone problem. if you have Digital DC Power Supply already that's good or if not! visit this link to Review Best Top DC Power Supply and find one which suits for your price range
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digital dc power supply |
If you are a new mobile technician and don't know what is this digital dc power supply? first, read this article on Wikipedia for a better understanding of AC-to-DC supply.
if you are an electronics student and reading this information to know more about the basics of DC power supplies, PSU, detailing linear and switching types and their advantages and disadvantages read this article also
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dc power supply description |
if you are an electronics student and reading this information to know more about the basics of DC power supplies, PSU, detailing linear and switching types and their advantages and disadvantages read this article also
How To Repair DC Power Supply
This video teaches you how to check repair dc power supply internal parts
This battery eliminator for battery repair latest article updated you before the year 2021 in the field of mobile phone repair
How to use dc power supply machine
For Checking a mobile battery and boosting it with dc supply power place the dc supply machine for mobile on 0 voltage and 0 amperes. then slowly increase the voltage untell unless ampere reading starts showing a reading. when the battery gets boosted ampere reading show switching on the mobile repair dc power supply.
Note: if ampere reading does not increase then the battery is faulty
Click here to watch the video on mobile repairing tips for Checking, boosting mobile battery with dc power supply
This is the mobile repairing tips and tricks for Checking a battery and boosting using power supply machine
How to check dead mobile with dc power supply
For Checking dead mobile with dc machine for mobile repairing place the dc machine on 4.1volt. you can see the mobile volt on mobile battery before setting it on dc power supply machine for mobile. now press power button of your phone. if the Ampere reading on the mobile repairing power supply show some value it means your phone primary and secondary lines are ok.
Click here to watch the video on how to revive a dead phone with dc power supply
Note: If the Ampere does not show any reading it means phone primary and secondary power supply is leaking.
Now the next question is going to be how do I connect this how do I connect a smartphone to a variable DC power supply?
so here we have the smartphone so on this end this is a plus and minus wires we need to plug into the smartphone. so you're gonna have a black wire which is going to be ground so this here is your red wire this is your positive of your DC power supply
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dc power supply crocodile cable |
as you can see in the picture I've already got two wired up here so in order to be compatible with all the different android devices I would suggest you get set up your DC power supply voltage on 4.1 to 4.2 volt and 200 Ampere because android phone or android tablet device often is not going to turn on if you do not plug them into a 4.1 DC Volt on your switching power supply.
so that is how you would use a DC power supply to power a smartphone you just plug it into these two wires to the Digital DC power supply it has functionality that allows you to watch your customer's phone Ampere and voltage readings
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voltage and ampere readings |
now you can also use this method here to power up a feature phone so you have to buy these little cables
these cables allow you to plug feature phones into a best dc power supply for mobile repairing with their battery connectors so this is a nice little cable over here it's nicely sleeved it reports proper temperature information supposedly you never know stuff from China and I can show you what that looks like in this picture
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measure USB current with dc power supply |
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Wire to read Mobile Phone circuit |
you can power the feature phone using a DC power supply with those cables you would just take them and you plug the red end into the red part of your DC power supply the black end ins the black part of your DC power supply connector you would set the voltage to the feature phone battery voltage around three point seven three-point eight volts and then you would plug this end into the battery connector on the feature phone and then you would be able to power the old mobile phones using the DC power supply rather than having and go around your shop and try to find your customer old mobile phone battery that you know works and you'd also be able to see the amount of amperage that it's drawing directly on the digital power supply for mobile phone repair which is pretty cool obviously try to avoid making the mistake of plugging in your feature Phone using smartphone voltage won't exactly be a happy feature phone Set DC power supply voltage on 3.7 and Ampere on 150 to check feature phone.
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how to use digital multimeter for mobile repairing pdf |
DC Power Supply for Mobile Repairing Price
in this article, I am also sharing the information with you about the best dc power supplies rate because the reader also went to know where to buy their mobile dc power supply machine.the website is listed below
Amazon
Aliexpress
Alibaba
eBay
the reason I bring this up is that I would say a good 99% of the people reading this post went to know the dc power supply for mobile phone repairing price before buying the best dc power supply remember, if you're just gonna want to go for the cheaper power supply don't go for something that's way too cheap because those are gonna send ripple currents and voltages and do all sorts of nasty stuff now you can also use this.
if you are interested in to read a PDF Book on regulated dc power supply click here
Learn how to use an analog multimeter and analog multimeter working principle in mobile phone repairing
How to Use DC Power Supply for Cell Phone Repair
you can also use DC power supply to supply DC (Direct Current) to a mobile phone PCB Printed Circuit Board. most mobile repair technicians used DC power supply to switch ON a smartphone without their batteries. the Supply can be used to substitute for the Cell Phone GND, +VBAT Battery Voltage when doing hot testing on the Mobile PCB. this is being used to trace the +VBAT, VCC main line in Mobile Phone PCB. the Supply provides high stability output voltage and its constant ampere can auto-conversion. you can use power supply in many different areas of the mobile phone PCB for hot testing.
To learn hot testing on mobile phone circuit follows these steps:
step one: adjust power supply on 3.8volt then connect its wires to mobile battery connectors
step two: turn ON the mobile phone
step three: now place multimeter black probe on mobile phone PCB Ground and place red probe on the print of VBB to check the DC voltage on phone circuit.
To learn hot testing on mobile phone circuit follows these steps:
step one: adjust power supply on 3.8volt then connect its wires to mobile battery connectors
step two: turn ON the mobile phone
step three: now place multimeter black probe on mobile phone PCB Ground and place red probe on the print of VBB to check the DC voltage on phone circuit.
To know the testing principle for mobile phone repairing read Digital Multimeter step by step guide
How to use DC Power Supply in Mobile Repairing?
You can use DC power supply mobile repairing to check four things in your customer phone- customer phone is dead or not
- customer phone circuit is a short circuit or not
- customer phone circuit prints are open or not
- customer phone has a software problem
1. Customer Phone is Dead or Not
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connecting examples |
Set DC power supply Voltage on 3.7 and Ampere on 150 to check feature phone.
Set DC power supply Voltage on 4.1 and Ampere on 200 to check smartphone.
If you are connecting Tablet then set switch supply Voltage on 4.2 and Ampere on 200.
Now switch ON the phone and see Ampere Reading.
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DC Power Supply feature phone Ampere |
Note: If the Ampere does not show any reading it means your phone power input track on battery connector is open.
2. Customer Phone Circuit is a Short Circuit or Not
Reasons for short circuit in mobile phone circuit :
1, Phone falling into toilet water or liquid damage. this is the most common reason that mobile phone users are facing in routine life.
2, The smartphone is warming again and again.
3, Using an incompatible or faulty phone charger for charging the battery. and also when you use the wrong charger to charge your phone and phone get hot.
4, Sometimes due to any reason phone has fallen down or crashed.
To check the mobile phone short circuit with dc power supply follow the step below:
step one: Set DC power supply output voltage on 3.7v or 4.1 volts.
step two: Connect the red wire to the positive terminal of the battery connector (+VBAT pin) and the black wire to the negative terminal (GND)as well as the 3rd pin called BSI battery status interface.
DC Power Supply Reading
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half short circuit |
Reading one: Now, if you see any amount of ampere on the screen, without you press phone power button then it means, the mobile phone is a short circuit.
Half Short Circuit
Reading two: And if there is the screen shows ‘0.38’ to ‘0.58’ in the ampere reading, then it is Half short circuit.
Full Short Circuit
Reading three: if you see on the screen shows ‘0.00’ in the voltage and ampere reading, then the mobile phone circuit is the full short circuit
3. Customer Phone Circuit Prints are Open or Not
To understand mobile phone short circuit better in your customer smartphone you have to know 2 terms of electronics:
Phone Circuit Print is Open: if a mobile phone print is broken, then it is said that the Print is open.
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cell phone circuit track is open |
Phone Circuit Prints are Short circuit: if 2 parallel separate Prints positive and negative touch each other due to fault in the mobile phone PCB, it is called a short circuit.
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component goes short |
Note: In PCB boards of the mobile phone, smartphone and tablets there is the print instead of copper wires through which dc current flows. Hence we use the term ‘Prints’ instead of copper wires or cables.
Now let me tell you the Problems of the short circuit in smartphones:
1, When you switch ON the phone, it goes switch OFF automatically after a few minutes.
2, Phone goes completely dead.
3, Phone battery goes drains and discharges fast.
4, The phone goes hot and the get Hang.
Note: The above procedure to check short circuit in the mobile phone with DC Power Supply is the same for all Mobile brands and tablets including Microsoft phone, Samsung, Nokia, Apple iPhone, Sony Xperia, HTC, Motorola, Q mobile Vivo, and Oppo handsets. It will be the same for all iOS, Android or Windows OS smartphones.
4. Customer Phone has a Software Problem
Set DC power supply output voltage on 3.7volt on the feature phone and 4.1 volts on the smartphone.
Connect red wire of the DC power supply connector cable to the positive terminal of the battery connector and black wire to the negative terminal and yellow probe to the middle pin of the battery connector of the feature phone.
In smartphone connect the power supply cable red wire to the positive terminal of the handset battery connector +VBAT and the black wire to the negative GND as well as the 3rd pin BSI to check the phone.
Now switch ON the phone and see Ampere reading. if you see 003 or 005 amperes on the screen, when you press the phone power button then it means, the feature phone software is corrupt.
And in the smartphone, you see at ampere reading screen 010 or 015 when you press the power button of the phone if the phone is in software fault.
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Ampere Reading Examples |
Remember, in many cases of software fault in a smartphone. the smartphone switch on but the screen show startup logo and digital dc power supply reading switch between 010 to 020 ampere
These are the examples readings of digital DC Power Supply for repairing mobile phones faults. so that is it for today post that is how you can use a DC power supply to power a smartphone and feature phone both to put the voltage and Ampere on your DC power supply screen and free information that's why I do it and as always I hope did you learn something
At the end of this Blog Post some useful pages to learn mobile repairing online:
29 Free PDF Ebook Online Library to learn mobile phone repair in the year 2021
Do you want to know which same parts are there in all Smartphones? If yes, go through this entire Gif Video Tutorial to know all the information you need to read Visual Guide Inside of Smartphones
2 Comments
thankyou....from Indonesia...
ReplyDeleteplease give a chart / list /table what may be the problem according to the ampeare value showed in dc supply
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