Posts tagged Mobile Repairing

Mobile Repairing Course

Why You Should Take Admission in Mobile Repairing Course?


Nowadays Mobile phones device has turned into an useful piece of our lives without which individuals can’t survive. Many people believe that while a mobile phone is damaged it is better to replace it than repair it but this is not true in all situations. A smartphone or mobile phone may be easily repaired and it does not need much time to do so nor does it cost much.

Key Advantages Of Mobile Phone Repairing training

An increasing number of cell phones are getting repaired these days, so cell phone repair courses can make a source of earning.

These courses are typically short term courses with short budget as well as students can do both full time as well as part time course whatever suits you.

Mobile Repairing courses not only teach you how to repair a mobile phone but can turn you into a proficient technician able of setting up your own business.

Mobile Repairing Course

There is a enormous shortage of skilled proficient technician in this field and this demand is ever growing.

It is very significant to search the high-quality institute to learn mobile phone repair to manage mobile phone for lifetime performance. The easy way to search the good institute to look on internet where you can search the long list of institutes which provide mobile repairing courses in your location.

After doing mobile repair courses you can easily enhance your income with a part time cell phone repair job or can establish your own repair business. Many institute offer short term course which duration is normally 45 . By using the minimum of time or resources an efficient way of earning can be found out. Many mobile phone repairing training institute also offer career counseling after successful completion of the course.


Mobile Phone Repairing

Reach New Heights & Get Your Aim to Be A Mobile Phone Technician


The field of mobile repairing is very career oriented as well as the IT industry is growing rapidly. Most of the persons select this course due to various reasons. Well, first major reason may be that it can be an already launched family business, the another reason you may be zealous about the innovative technology, third could be you are repair savvy who enjoys repairing mobile in their additional time, or it may be a part time job. Let’s leave this blah, blah.

Whatever the reason for selecting this mobile repairing career, there are some basic criteria that need to be fulfilled to become a mobile repair technician.

Out of the box thoughts is a very essential attribute for solving issues in mobile phone device, you should enjoy taking problems and finding how things work. Good diagnostic and logical thinking is necessary since the cell phone is based on logical systems. It’s very important to be a high-quality communicator. A positive and friendly attitude during dealing with clients/customers without confusing customers.

Mobile Phone Repairing

Sufficient work skill after your diploma are the most significant things in this mobile repair field because it is a hands on area of work and book learning can’t take advantage , you have to spend in troubleshooting and actual repair. Many mobile repair specialized are willing to offer tips and tricks for deserving beginners as well as this experience is valuable as you get the benefits of having a tested mentor in this sector who can share knowledge as well as provide relevant information about this technology.

Buck up your skills, going for best mobile phone repairing courses and staying yourself on the cutting edge of development and technology in this field are very necessary for an expert.

mobile repairing course

Bright Career in Short Term Mobile Repairing Course


Mobile phones are considered to be one of the significant components for the person. In easy terms, people are said to be incomplete without the cell phones. They are the resource of the connection as well as interactions among the individuals. But however, as we see that every single technological innovation has to go through some of the problems and complications.

In the same way, as a the mobile phone gets broken, it has to get fixed by taking the help of the professional. But now the major query is that there are many such individuals who take advantages of mobile repairing. Well, there are many facilities that even support, the technician with the fixing techniques in much easier way.

mobile repairing course

Chiptroniks conduct mobile phone repairing training course for students who are not able to attend our classes and are so far from us. This is a home learning as well as a corresponding type of training to learn mobile phone repairing as well as fixing.

In this course we will guide you to learn mobile phone repairing from the comfort of your home by taking your own time during self-study. It is not only useful for people from a technical background as well as engineers, but even if you are a total novice or a Do-It-Yourself type you can easily join and learn the skills required to repair mobile phone devices.

The mobile phone repair training is conducted by a tutorial DVD (containing videos, guides and manuals).

Mobile Repair Syllabus

  • Basic Electronics
  • Information of Mobile Phone Technology (CDMA, GSM, Chinese)
  • Knowledge of Microchip and Micro Processor Technology
  • Chip Level Practical Training
  • Circuit Diagram of Different Types of mobile phones and complete Software Installation
  • Tracing as well as faults in hardware & Software

chiptroniks laptop repairing presentation


Plz find our presentation on our laptop training. Call us on 011-47592046 to book your training.
Laptop Repairing CHIPTRONIKS

laptop repairing course syllabus 3 month


laptop repairing course syllabus1 month


How to measure Laptop lcd screen size?


Screen sizes are normally measured in inches from one corner to the corner diagonally across from it. This diagonal measuring system actually came about because the early television manufacturers wanted to make the screen size of their TVs sound more impressive. Measuring your screen is quite easy: Learn more tips from laptop repairing institute;

  • Step 1 : Find the two points you will use for measuring your laptop LCD screen. The first point will be one of the screen corners — this is the corner of the screen, not the frame of the notebook. The second point will be the opposite corner from the first (for example, measure from the top left corner of the laptop LCD screen to the bottom right corner).
  • Step 2 Hold the end of your measuring tape down at the first corner of the screen, and extend the measuring tape until you reach the second corner.
  • Step 3 Read the hash mark on the tape measure at the point where the tape measure reaches the second corner. The number you see will be the size of your LCD laptop screen.

Some common Laptop LCD screen sizes are as under,


  • 6x86Fast: Raises the performance of Cyrix/IBM 5×86 and 6×86 CPUs between 5% and 10%. It is not guaranteed that this software will work with MII or 6x86MX CPUs.
  • 6x86Opt: Package containing optimization software and Windows 95 fix for Cyrix CPUs (6×86, 6x86MX and MII).
  • Advanced WindowsCare: Optmizes and remove errors from your PC.
  • Cacheman: Correctly adjusts the disk cache under Windows 9x/ME/XP.
  • Centrino Hardware Control: Controls many features of your Centrino (Pentium M) CPU.
  • MemTurbo: Memory manager, frees up system memory. Excellent to use in computers with low RAM memory available.
  • Rambooster: Memory manager, frees up system memory. Excellent to check how much RAM memory is being used right now.
  • WcpuL2: Changes the L2 cache latency from 6th generation Intel CPUs (Celeron, Pentium II and Pentium III), raising the PC performance.

power delivery system in motherboards


In this article we will discuss Power Delivery system in Motherboards . For more in depth training , join PCLR Course of chiptroniks or you can also buy our course materials with online support.

Power Delivery

Power delivery—Why & How

Why: Motherboard components need one or multiple stable and clean DC power to work correctly

How: (1) Power Supply directly to motherboard components (2) for the power which Power Supply can not provide directly, DC to DC power converter on the motherboard converts the power and provide to components

Voltages type needed

Postive DC Voltage: generally between 0V to 12V, generated by DC-DC converter 0.75V, 1.5V, 1.1V… or directly from power supply, like 3.3V, 5V, 12V

Negative DC Voltage: typically -12V

Motherboard voltage normally ranges from -12V to 12V

Tips: General speaking

Higher speed component=> lower voltage needed

(especially for IO function)

Current types needed

Simple answer: Power/voltage=current needed

Low power device: <2A, example: Clock chip, LAN…

Medium power device : between 2A to 50A: example: Fan, DIMM, Chipset

High power device: >50A, example: processor, high power DIMM, high end Graphic card etc

The low/medium/high is just general category, no standard

Tips: High current device has higher requirements on the PCB

Space, layers, cost, copper thickness…, all in all, bigger current,

more design challenge for power designer and CAD engineer

Examples: components Voltage & Current

1.0V to 1.5V, 50A to 150A, 130W

1.8V/0.9V for DDR2, 1.5V/0.75V for DDR3, 20A to 40A, 50-100W

Chipset: 1.1V, 10-20A, 5W to 30W

Onboard device: 1.5A, 1-2A, 3.3V, 0.5W to 5W

PCI slot: PCI slot: 12V, 0.5A, 3.3V, 3A, 5V, 1A, 15W, 25W, 75W or more

Fan connector: Depends on fan used, ranges from 0.1A to 5A, 5W to 50W


Normally 1 Components need multiple voltage rails

depends on what function needed, such as ICH need

1.5V, 3.3V, 1.8V…, more function, more voltage rails needed

For example: ICH has more voltage rail than CPU

due to ICH has more functions

Voltage types by components function

Components may need several voltages by functions: below is general category

(CPU), VDD (DIMM), occupy most the power pin of the components

IO Voltage: Core Voltage: Main voltage for core logic, most of the power consumes on the main voltage) for the core function, example VCCP Voltage for BUS, example: CPU Vtt

Reference Voltage: voltage used for signal sampling

Analog voltage: Some components include analog function, so analog voltage needed, such as Video, PLL circuit, analog voltage require to be clean ! Need to be separated from normal voltage

Components may contain 1 or more type of voltages depends on

Function needed, such as ICH need all 3 above voltages

Voltage types by power state

Some voltage are only required for certain power state

Normal Voltage: Voltage existing when the system is at S0 to S2 state, which means system is at ON state, like CPU main power, fan power, which is main power for the system

Battery Voltage: Voltage existing when the system at AC OFF status, it is powered by onboard battery. Example RTC clock

Standby Voltage: voltage always exists at S0 to S5 state (DC OFF), which means system at DC off state, AC power code is plugged, it is used for board power on/off logic and wake up function and some management function and other functions need to be functional at main power off state, remember, when AC power cord inserted, standby voltage exists !!

Aux Voltage: Voltage switch by between Standby voltage and same Normal Voltage, the main reason of Aux voltage is the function is needed through S0 to S5 state, but standby power can not provide enough current at S0-S2 state due to the device consume more power at S0-S2 state then S3-S5 state, so voltage need switch from standby voltage to normal voltage to get enough current , example: DDR voltage 1.8V, when system is at S3, the Aux voltage comes from 1.8V standby power to keep DIMM refresh, after power on to S0 state, Aux voltage switch to 1.8V normal voltage to support DIMM normal read/write (which consume much more current)

Components may contain 1 or more type of voltages depends on

Function needed, such as ICH need all 4 above voltages

Let us take a look at a real sample-Chipset

G41 MCH (north bridge) function/power mapping

(not exactly correct, just for example)

Another example—ICH 10

ICH 10 has require more than 20 voltage rails !! due to lots of functions integrated in ICH 10

Refer to product EDS for pin definition and power requirement

Example 3—PCI-E slot Power requirement

This voltage supply to add in PCI-e card, Card is required to design within this limit

Overall Power Delivery Example–Thurley

Overall Power Delivery Example2—Romley

Motherboard Input Power

Now, we know what kind of power (voltage/Current) needed by components, but where does it come from? Answer: from Power Supply, directly or indirectly

Power Supply Output (motherboard input)

Power Supply output type:

Multiple Output:

Power supply has multiple DC output rail (NOT connector)

Popular 12V, 5V, 3.3V, -12V, 5VSB and other voltage

12V output may have separate rails, like 12V1, 12V2, etc for 240VA protection

Single output: 12V or other voltage only

Power supply has single DC output, 12V is most popular

Battery is single output example

Power Supply output interface:

Connector: board to board or board to cable connector

PCB gold finger: PCB to mating connector


Most of single output PSU also has standby output, like 5VSB

Power Supply Output example 1

Desktop ATX PSU : Multiple output, cable + connector

Server EPS12V : Multiple output, cable + connector

Power Supply Output example 2

Notebook Adapter:

19V Single output, connector, connect to motherboard directly

Hotswap module :

12V single output, gold finger and board to board connector


normally it also has 5VSB output

Motherboard side interface

General Rule: mate with power supply output


Gold finger mating connector

Board to Board connector




Motherboard power rails & Power supply rails

As we talked before, multiple-output power supply has multiple output, each rail will have current limit, and each rail are separated below is example


Same for motherboard, motherboard will also have multiple rails, like 3.3V, 5V, 12V1, 12V3a…, each rail has current requirement, so we need to mapping the power supply rails to motherboard rails to make sure both power supply & motherboard rails can be met

Next page is example


Rail mapping Example



Power supply connector/rail mapping


Power supply rail can be separate to support multiple

motherboard rail, but reverse is NOT allowed!, otherwise it will

Short power supply rails and cause protection

DC to DC converter

So far, we know how power supply provide voltage rail to motherboard, like 12V, 5V 3.3V, etc by connectors or PCB gold finger or other method, but for the other voltage power supply can not provide, like 1.1V, 1.5V, 0.8V, we need DC to DC converter on the motherboard to convert the power supply voltage to the voltage we needed

DC to DC converter also called Voltage regulator (VR)

DC to DC converter (VR) types

(1) Linear voltage regulator

-Low current

-Low efficiency

-Low cost


-Clean (little noise)

-High current

-High efficiency

-High cost


-High noise

Linear VR

Simple & Clean (little noise)

-Low current

-Low voltage drop

-Low efficiency

-Low cost


(1) Why low current and low voltage drop?

vdrop on the VR= Vout-Vin, so the power loss = I x Vdrop, for example: Vin=3.3V, Vout=1.5V, 2A, so the power loss on converter is (3.3-1.5)x2=3.6W, assume 50C/W, so the temp rise will be 150C, which is burn the components, so only low current and low voltage is allowed, Linear VR only support low current requirement

(2) Why low efficiency?

The efficiency= output power/input power, obvious, it is low efficiency due to the power loss on the converter is big, the bigger difference between Vin and Vout, the lower efficiency is.

(3) Why simple & clean & low cost

It is simple & due to just a few components needed

It is clean due to no switch components, it is easier to place & layout the linear VR

Switching VR Types—Single Phase

-High current

-High efficiency

-High cost


-High noise

Basic working principal is by control the mosfet PWM value to adjust the output voltage, Vout/Vin=PWM%, for example: 12V to 1.5V, PWM=12.5%

Switching VR efficiency is between 80 to 98% depends on VR design, the main power loss is VR Mosfet switching & conduct loss

It can handle high current due to high efficiency

High cost /complex is obvious: it need chip, mosfet, inductor, capacitor…

High noise: due to switching method and mosfet switching, it has much higher noise than linear regulator

We will NOT discuss how VR works here, refer to VR training slides

if you are interested, Overall speaking, VR is a complex technology


Switching VR Types—Multi Phase

VR example

Switching VR—single phase 12V to DDR 1.5V

Switching VR—multi phase 12V to CPU Vcore

Linear VR–3.3V to IOH 1.8V


Linear VR–3.3V to IOH 1.8V

VR placement & layout

CPU VCCP VR placement

CPU VCCP VR copper planar

Career in Chip level Repairing


In this article , We will explain  the essence of chip level repairing together with the happening future of the chip level technicians . We will also explain How CHIPTRONIKS stands tall  in this market .

Every year thousands of Desktop PCs, Servers, Printers, Laptops etc are being sold and these Electronics Products becomes faulty/defective during their warranty as well as after warranty. As it is well known that in the First World Countries, the MNC Companies have monopoly on their products and as such they have tried to dominate the Concept of USE and Throw, secondly the cost of manpower in repairing the faulty devices are so high that the Chip Level Repair Technology can not be justified. As a result these MNC companies who are the manufacturers of Computer Systems and its Peripherals have never favoured the development of the Components Level Repair so that they can sell a complete PCB Assembly of any peripherals at high price.

In developing countries  like India , African nations , the scenario is pretty different  owing to low manpower and economical status . These countries are obsessed with term longevity and mileage . So people  would like to use the electronics components as long as possible . This develops  a huge market fro repairing.
CHIPTRONIKS  which is led by the Intelligent team of IITians , the leader in technology  has been the frontrunner in delivering  technical training developed a methodology for chip level training . Its a common notion and practice that the experienced guys in this market tried to avoid sharing of knowledge and tips they have gathered . But this attitude among the experienced technicians  was a big roadblock to developments in repairing technology . CHIPTRONIKS  dedicated research and development created the feasibility of such training In India  and now students and technicians across the world are flocking to  our labs for such training . Moreover the the component level repairing(chip level) can be done at 80 % of the cost , so the value of this type of  repairing  has increased.
There are so many institutes which provide repairing training at card level but none of them have the expertise and capability to offer chip level  training . In a way the training offered by them are only 25 % . So CHIPTRONIKS attracts not only fresh technicians but also experienced engineers to gain  the fruits of chip level repairing technology.
The advantages of chip Level Engineer over Card Level Engineer will always be there because of better troubleshooting knowledge by understanding the measurements of parameters of ICs and discrete components of which each peripherals are made of.
For example, a DMP printer’s have logic card problem, which will cost about Rs. 3000/- for a new Logic Card in order to Service it, so a Card Level Engineer will suggest to the customers to buy a new printer’s logic card where as a Chip Level Engineer will suggest to repair the faulty logic card at approx. Rs. 500/- and bill at Rs. 1500/- to the customer. Therefore the demand for the Chip Level Repairing is there all over India.
A Chip Level Repair Engineer will get highest salary in any firm a compared to Card Level Hardware Engineer. So those who know the Chip Level Repair Technology are the prestigious and elite ones. Generally any Hardware Engineer who after learning Chip Level Repair Technology should get an increment of about 25%-30% on his salary.
Our all trainers are Level 4 repairing engineers who can handle any type of repairing themselves plus they are aware of the ESD norms and so they can guide the precautionary steps needed for chip level repairing . CHIPTRONIKS posess advance equipments like : Jovy System BGA machines ,Xytronics Soldering station, JBC De-soldering stations , SMPS load tester ,Repower Cell test system,RAMCHECK PLUS MEMORY TESTER , OSCILLOSCOPE (IWATSU SS7840), Point Soldering manchine and many other speciL TOOLS .
CHIPTRONIKS has also developed manuals  for all repairing the motherboards , monitors , laptops , smps . These all manuals are all practical based . Our manuals are even used by many companies .
So I think joining CHIPTRONIKS will  fulfill your dream of becoming a chip level engineer .
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