Posts tagged Mobile Repairing
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.
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.
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.
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 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.
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
Plz find our presentation on our laptop training. Call us on 011-47592046 to book your training.
Laptop Repairing CHIPTRONIKS
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;
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.
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—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:
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
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
-Clean (little noise)
Simple & Clean (little noise)
-Low voltage drop
(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
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
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
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.