Nokia 6124c Charger Not Supported Solution

Here's the solution for Nokia 6124 classic with charger not supported problem. This solution shows which certain components needs to replace when such kind of problem occurred.

Refer to the solution below and locate the highlighted component on the PCB board. Then do a replacement for that particular component.

Nokia 6124C Not Charging solution - charger not supported

The BTEMP (battery temperature) resistor which has a value of 47K is connected to the battery BSI (battery stat indicator) terminal. If the said component become faulty or damaged it will result and show "charger not supported" on the device when the charger is being plug-in. Replacing it will possibly fix the problem.http://welcomeservice.blogspot.in/

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Phone repair Tutorial-Nokia firmware downgrade with JAF and USB

This tutorial is how to do the flashing in this downgrading on nokia mobile phone without using any hardware Flasher.

What is needed in this tutorial is flashing software (in this case JAF), congenital data cable, a software emulator that can emulate hardware Flasher box before, and your courage to do the flashing.
 any way used to make modifications to the Flash ROM nonetheless there is a risk that would arise such as brick on your handphone.

Without more broadly at length below is a tutorial step by step to perform downgrading the firmware nokia

1) Download and install the required programs on your PC (recommended os pc with Windows XP Service Pack 3)
JAF.1.98.62--->> _http://rapidshare.com/files/186146404/JAF.1.98.62.rar
This program has been accompanied by Flasher JAF box emulation program, but recommended using the latest version of the emulator can be found here-->>_http://www.4shared.com/file/81442708/ebe4209e/OGM_JAF_PKEY_Emulator_v4.html


2) Download the firmware you need from this site, or you can search via google, or use NaviFirm (Credits goes to Sapie05)

3) Connect your phone to your PC using a USB cable congenital

4) Run the emulator JAF box,

In step 1, select Random Raskal PKEY SN
In step 2, select the JAF (main)
Click the GO tab (selected LAUNCHED EXE)

5) The program will run automatically JAF

Select BB5 tab
In the section Flash settings, check the options that you want to do in this case downgrade the firmware, then check the box downgrade
and uncheck the box normal
In the Operation section, click the tab INF and CHK
In Phone Mode section, click the tab? (Question mark)

6) After the firmware and your phone mode is identified, click on the FLASH tab on the Operation section for the process of flashing

7) Wait for the flashing process runs automatically until finished (done), then you've succeeded in doing flashing on your mobile phone

This tutorial was tested on my mobile phone with some good, but still there is risk of failure at the flashing process

Note:
Install Nokia Flashing Cable Driver and Nokia Service Tool Drivers beforehand if JAF can not detect your phone

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What is An Application Processor in Mobile Phones Circuit Do

An application processor is a central proccessing unit (CPU) like the one installed on personal computer. It is the brain and controls all kind of data and information any application in mobile phones circuit.
It is microprocessor integrated circuit (IC) chip.



 LCD controller, camera interface, serial interfaces, memory interface,USB  controller, bluetooth and wifi controller,and more. are controlled by an the application processor.

Here's an example of an application processor block diagram below, on how this kind of IC works on mobile phones circuit. This kind of  an application is commonly used on Nokia latest designed of mobile handsets. The description of this application processor below will help us understand how does this certain IC work.
omap block diagram

OMAP2420 Processor

The OMAP2420 processor is a single-chip applications processor that supports all cellular standards, and complements any modem or chipset and any air interface. It is intended for high-volume wireless handset manufacturers and is not available through distributors. The OMAP2420 includes the benefits of the OMAP 2 architecture’s parallel processing, giving users the ability to instantly run applications and operate multiple functions simultaneously without quality of service compromises. The OMAP2420 includes an integrated ARM1136 processor (330 MHz), a TI TMS320C55x™DSP (220 MHz), 2D/3D graphics accelerator, imaging and video accelerator, high-performance system interconnects and industry-standard peripherals.
Graphics

The OMAP2420 processor embeds Imagination Technologies' POWERVR MBX™ graphics core, making it the first applications processor to support OpenGL ES® 1.1 and OpenVG™, providing superior graphics performance and advanced user interface capabilities. TI is enabling sophisticated and dynamic images with "smart pixel" technology offered via OpenGL ES 1.1. This unique technology allows each pixel in an image to be programmed individually, giving developers the power to create rich effects with cinematic realism. Users will now experience "life-like" facial features, advanced reflection effects and multi-textured backgrounds in the mobile environment.

Multimedia enhancements made in the OMAP2420 include an added imaging and video accelerator for higher-resolution still capture applications, multi-megapixel cameras and full-motion video encode and decode with VGA resolution of 30 frames per second. An added TV video output supports connections to television displays for displaying images and video captured from the handset. 5-Mb internal SRAM also boost streaming media performance. Access to the OMAP Developer Network also provides an extensive range of programs and media components that manufacturers can use for differentiating and delivering products to market fast.
Key Features:

    Dedicated 2D/3D graphics accelerator at 2 million polygons per second
    Added imaging and video accelerator enables high-resolution still image capture, larger screen sizes and higher video frame rates
    Supports high-end features including 4+ megapixel cameras, VGA-quality video, high-end interactive gaming functionality and analog/digital TV video output
    5-Mb internal SRAM boosts streaming media performance
    Software compatibility with previous OMAP processors
    Parallel processing ensures no interruptions or degradation of service with simultaneously running applications
    Optimized power management companion chip, TWL92230 12 mm x 12 mm, 325-ball MicroStar BGA™, 0.5-mm pitch

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HTC 7 Pro Hard Reset - Wipe and Restore to Factory Default Settings Procedures

This is a step by step instruction on how to hard reset (factory reset) the HTC 7 Pro and restore to factory default settings. 

NOTE: Performing a Factory reset  will permanently delete all your data and customized settings, and it will also remove all applications  you’ve downloaded and installed on the device. Make sure to have a back up copy of any data and files you want to keep before you do a factory reset.

Performing a factory reset via Menu settings

   1. From the home screen, swipe left to expose your app list

   2. Select Settings

   3. Scroll down and select about

   4. Select reset your phone

   5. Select yes to confirm, then select yes to confirm again

If having problem how to turn on the phone or access the phone settings, or it become frozen or  unresponsive you can still perform a factory reset by using the buttons of the phone.

Here's how to hard reset your HTC 7 Pro via button combination.

http://welcomeservice.blogspot.in

   1. Shut down the phone or turned it off, or remove the battery and then reinsert it back again.

press and hold the VOLUME UP and DOWN buttons, and then briefly press the POWER button.

   2. Wait for  the instructions to show on the screen on how to do the factory reset, and then release the VOLUME UP and DOWN buttons.

   3. Follow the instructions onscreen how to factory reset your phone.

Then your HTC 7 Pro will  then reboot and you'll be left with a factory fresh phone.

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nokia 7230 full solution

Nokia 7230 Charging, Mic, Speaker, MMC, Network, Signal, Jumper Ways Solution 
download

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How does Charging Circuit Works from a Battery Charger to charge a Mobile phone Battery

This lesson is also important for charging problem troubleshooting for knowing which parts or components has being used to make a charging circuit. Many mobile phone technicians had been asking me,how does mobile phone charging circuit works? How does a battery charger can charge a mobile phone battery?
To tell the truth many of them has never heard of this even they already fix thousands of mobile phones in their years of cellphone repair careers." and I am one of them.
I don't know but I know how fix it, its so easy"  that's what we've oftenly  said.
Well, we all know that all  mobile phones  are all battery operated handsets that needs to charge the battery so that it will continue working,  failure to charge it will result to unable to power up the mobile phone handsets.Here's a brief explanation of how charging circuit works,
 I prepare this simple idea and diminished some electronics technical terms so that everyone without adequate knowledge on electronics technical terms might can catch up with this.

A  charging circuit is composed of the following stages or sections. 

1. Battery Charger Circuits - Although this is not found on mobile phones PC board circuit and have separate circuit but definitely  this is also part of charging circuit; without this, the charging circuit is not complete and will not work completely.   
This circuit is all parts and components  that being mounted on any mobile phone charger, this is the one that converts AC (Alternating Current)voltage to DC  (Direct Current)voltage.What is AC Voltage? This voltage is a power source that we used in our household appliances to work  and operate, this voltage can cause risk of electric shock and very dangerous to humans when being touch.This kind of voltage hasan alternate polarity.
What is DC voltage? This voltage is a low level voltage which typically found on any kind of  batteries.
This kind of voltage have two polarities, the negative and the positive. 

Here's how the battery charger works, the 110 or 220 AC volts  coming from the electrical outlet at home or etc. will be converted to a desired DC voltage like 4.5 to 6 volt DC because the phone only accepts and can be operated into small amount of DC voltage.

A DC voltage output of a charger is only an artificial DC voltage, why is that? because only a battery cell can produce a 100% pure DC voltage.

2. Protection Circuit- this circuit is composed of a Fuse, Inductor coil Diode and Capacitors,  before the DC voltage reach to the charging voltage control circuits the protection circuit is the one that control and check if that  voltage is in exact amount. Let say the desired amount of DC voltage is only 5.6 volts above that point the fuse will be blown out to stop the voltage to flow so that it prevents damaging to another corresponding circuits.
In a protection circuit below of Nokia BB5 mobile phones a diode is the one that measure the amount of voltage from the battery charger, this diode has a reaching point of desired voltage to measure of how much amount of voltage will be allowed to flow within that line, when exceed to that desired point of voltage the diode will then cut it off.

 like for example if that diode is being designed that only allows only 7 volts from the battery charger to flow on that line. Now, above that desired voltage let say that the voltage becomes 8 or higher the diode will then be reacts and destruct itself, this is what then so-called shorted component; so that the current will flow directly to ground and will not reach to the following or corresponding circuit. If the diode will cut off or shorted the fuse will tends to blow and totally cut the voltage line. The inductor coil's role is to filter unwanted voltage saturation, it rejects abnormal voltage modulation caused by electrostatic interference.

3. Charger Voltage Control Circuit - This is the stage where the charger voltage and current is being stabilized, amplified, rectified, regulated and other voltage purification process is being held in this area before it feeds to the battery. This kind of circuit commonly being pack in a chips together with another circuits.  

A failure of this certain area will result on charging problem status. This area mostly called by most technician as a Charging IC it is because this circuit is inside in a particular IC chips, but eventually  this circuit also accompanied by many other circuit types and not exclusive to a certain charging area.

This pictures shows is the next corresponding circuit from the protection circuit area. The voltage from charger is now then feeds into  three  terminal inputs of the charger voltage control circuits.

in this figure shows  after the voltage stabilization and purification process the voltage is now then feeds to the battery terminal.

4. Charging Control Circuit - this is the area where the charging process is being monitored, this is the one that sends information to  the application processor to start or stop  the charging process. This area is part of  Power management circuit, so-called POWER IC by many technicians.

In this picture  that there are two terminal signal from the voltage  control  that sends data to the Charging control circuit, this two data signals  will inform to the charging control circuit that a charger voltage is being  entered or plug-in. After this charging control circuits receives the data it will then analyze and convert that data into digital signal then sends it to the Application processor. 

The application processor which is the brain of all the circuits now then decide if all the data's are in correct or in right information to begin the process,
It always relies on the data that sends by the charging control circuit, then  decide all data and completely process it.


Okay now lets take an example and apply this particular method on a mobile phone circuitry component layout, I have here a Nokia N95 board, which is a good way to start with, while we still working on advance training.  Now, try to analyze and compare all of those previous picture above and combined them into each corresponding stages or section, in this manner you can build an step by step tracing procedure on how to deal charging problem issues.

In the picture above shows, how and where the voltage flow from a charger voltage source through the entire  PC board circuit. This is the the method where you can start and manage how to locate and trace each and every component to find possible problems regarding charging problem issues.

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How to Test Mobile Phone Vibration Motor

A mobile phone vibration is created by a small motor called Vibra motor. when applied by a voltage or current it rotates and the vibration is generated by a small tiny piece of metal attach to its tip.

Checking this small piece of motor was so very easy just set the analog multi-tester range to X1 in resistance
 settings then connect the both probes to each terminals, polarity doesn't matter here for the motor will rotate clockwise if its in the right polarity. and rotates counter clockwise when not in each corresponding polarity.
A good and working vibration motor will then rotate and a bad or busted one will not.

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