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Go Back   GSM-Forum > GSM & CDMA Phones Hardware Repair Area > Hardware Equipments for GSM

Hardware Equipments for GSM All about Hardware Instruments and equipments like Soldering Stations, Hardware Tools, Oscilloscopes , Frequency Counters ..ext.

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Old 10-14-2009, 15:05   #1 (permalink)
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Familiar with hardware components and mobile phone ( site school )

the city-gsm school
the best team in asia

Hi dear friendly with you
Forasmuch as many might want to know your friend's mobile phone hardware
And how they've had to something very simple and understandable language for your users
Site :

آReady I hope your friend's attention to be exposed.

In this article you local hardware and mobile phone parts and process that
. Due to its dialogue and be able to use are Gvshytvn I will explain.
. Content to prevent long I put it in the bipartite.

Part I:

Natural range due to the compact structure are complicated and do a different design Other disconnect the electric are. This disconnect is a 7 layer within each of the
different circuits have been passed in this circuit parts range to the
. Are connected to the Mtalyz·h this section is called.
. First of all to explain basic concepts in the field of mobile phone parts to revisit.

. This piece as a decreasing voltage is Mhsvb.
For example, for parts that require less voltage than the battery voltage with a resistance in the circuit
. For reducing the voltage used.

This piece, depending on what the circuit can be used with various applications
. Is. But in general, as a storage voltage is used.
. For example, I think the camera flash that requires a high voltage. This high voltage capacitor provides.

Self: (winding)
Futures or winding piece is more than the frequency circuits are used. This
A variety of pieces that can be used as a ***** or two impedance matching circuit together. Also as a storage voltage is used.


Piece of the bipod protective and stabilizing role of voltage Knndgy. And flow in
They are one-way. And are multifarious.

base piece that depending on what type of circuit to use a different function.
The more transistors to boost supply Switching is used.

The piece is composed of integrated circuits and components within each lot
The Order have been appropriate.
. IC package to work in practice are different.

********************** **********************

Natural range of three or division which is the main block, including:

1- RF ( Radio Frequency ) 1 - Block RF (Radio Frequency)
2- AF ( Analog Frequency ) 2 - Block AF (Analog Frequency)
3- Base Band 3 - Block Base Band

- block RF

This block and parts belonging to the upper range of the phone are. This block
GSM BTS . In fact, the task downloaded from offshore frequency GSM BTS it is responsible for telecommunications.
After this information Frequencies within them and to isolate parts
Desired to post the phone.

This block includes pieces such as:
VCO , Antennas, antenna switches, ***** of SAW, IP thirty RF, 26 MHz crystal, VCO,

- Antenna:
In fact, the frequency of duty download offshore BTS is responsible for.

- Switch Antenna:
This piece you state it gives the sender and recipient and between the two
Mode switch is.

***** Of SAW:
Implies that the task Hmvntvr Namshvn ***** Yng and responsible for making noise
. That have frequency than GSM frequencies allowed in your phone you do not.

- Ic thirty RF:
. This IC task modulation and it is responsible Dmdvlasyvn.

** That sounds forasmuch publication with limited ability to resolve this problem, the frequency of communication
Or waves with long wavelengths are using the ability to release very Msaft
. Away are having. The sounds or information to ride this wave and then be sent.
Destination information mounted on the waves must be separated by a specific piece that
. Responsible for this work in Mobile IP is thirty RF. Assemblage of information on the modulation waves and waves of information act isolation
. Dmdvlasyvn to say.
AF After the IC RF Frequencies separation of information I will send them to block AF.
(AF fate data block section I will explain itself.)
RF Over the acts that information is brought to block AF series data blocks RF And RF IC is one. In this IC should have received information on the ride the waves. To (modulation) to prepare for one. Is required at this stage as waves or frequencies mentioned by piece to create.
This piece called frequency by 26 MHz crystal is created and provided
IC for RF modulation placed. The operation to the frequency modulation
Ic thirty PF is sent.

Ic PF:
This duty to strengthen Ic thirty Posted frequency is responsible for frequency
Or waves to the antenna switch is a switch to the dish antenna to help this phone Frequencies to release it in space.

. This piece actually a task into another frequency is responsible for.. Work for better understanding the VCO suppose when you are in phone conversation. In this case, your nearest BTS Tower Frequencies to get in now if you
Be moving offshore BTS and get the information out to you and other offshore
You must close relationship with previous offshore and cut the frequency of new offshore and closer to Download See. But since the offshore BTS with different frequencies are normally
. You can download the new Tower of frequency can not communicate you will be cut.. To overcome this problem would piece phones to VCO is designed. Previous VCO frequency with new frequencies and you will fit without any problem
Frequencies can get.

Block AF
. This block parts such as IC Audio (sound), speakers and microphone are.
. Was said in part before the information from RF to Ic is sent to the AF block.
In this first piece of information can be entered Ic Voice is thirty.

Ic Audio or Voice:
This Ic with COBBA be known as its main task of converting digital information
To analog and vice versa are. In fact, this information from the IMD IMD RF Download
And he is the digital to analog conversion and the long phone chat
And in this case sends is that we are able to hear the personal voice of the talking

. We are with.
Now, we can also talk to us we sound the line by someone who. Is our voice be heard through the microphone must be downloaded.
Microphone sounds with the electrical signal into sound and sends the Ic.
Ic sound waves that these are the analog to digital and into the
RF Ic block sends.
The fate of the RF waves block section I explained before.
And you sound this way by someone who is behind the line are audible.
Dear Friends note that all Ic audio as an Ic phone to the
Individual is not visible. 3 For example, Nokia 1100 to the IMD 3 IMD with another . Ic single form to UEM.
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Old 03-28-2011, 09:47   #2 (permalink)
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