Know the part of Your Mobile Device

Saturday, May 5th, 2012 - Business Gallery

Know the part of Your Mobile DeviceKnow the part of Your Mobile Device

Hopefully this article can provide benefits and new knowledge about cell phone service. Let’s learn together…. Know the part of Your Mobile Device

The bottom of the phone are grouped into several sections, among others:

1. Voltage section
Is the part that gives the voltage on any related components and work on CPU command

2. Section Signal (RX and TX)
Is the part that regulates the entry and exit signals and sends the data to the CPU for processing or processed into sound waves and display on the LCD.

3. Data section (Operating System)
Is a section which serves as the Operating System and process data that gives orders to all parts contained on the phone.

4. Audio section
Exit the process is that the inclusion of sound vibrations on the phone.

Know the part of Your Mobile Device

1.1. THE VOLTAGE

This voltage is divided into sections of several components that work in the phone, it’s components include:

1. Battery
2. IC Power Supply
3. Switch On / Off
4. CPU

A. When the phone is off, Battery remain given current / voltage to the phone. namely the PA IC, IC Regulator, Charging IC, IC Interface

2. Power Supply IC process and divide the current / voltage coming from the Battery and then issue a standby voltage to CPU. If damage to the IC Power Supply, there will be no standby voltage / VBB of the Power Supply. Power Supply IC will issue a voltage (output) after On my phone in, but the voltage VBB which serves as a standby voltage.

3. On my current phone on, the CPU got a negative voltage (-) of the Switch On / Off, and then ordered the CPU Power Supply to supply current / voltage to each section on the Phone

4. In charging, the current / voltage of the Charger go through Resistor Fuse that functions as an excess current fuse. If going into Charging IC. Current / voltage coming into the IC cahrging in and out as if the output voltage must correspond to the Battery. Charging Charging Ic contained on Sense as a controller in the form of data associated with IC Power Supply, function in case of discrepancy with the performance of Charging IC, Power IC will decide then recharge by sending data to the CPU that charging by the term gagal.Dikenal Not Charging / not filling.

1.2. THE SIGNAL (RX and TX)

Signal Reception (RX)

At this section, work on phones that work consists of several components, these components include:
Know the part of Your Mobile Device
1. Antenna
2. The antenna switch / duplexer
3. RX filter (Filter)
4. Transistor (For amplifier RX)
5. IC RF / RF Proceccor
6. VCO
7. IC Power Supply

To find out whether or not the RX works, it can be seen by looking from the Manual setting Network.Jika not get a list of network operators, it is certain that the RX problematic.

Components of the RX system work:

1. Signal is captured / accepted by Antenna Antenna Switch forwarded to the terminal

2. The antenna switch will issue two signals R for Dual Band Cell Phone, the DCS-RX (1800MHz) & GSM-RX (900MHz). Both signals are passed to filter the signal RX, RX signals are filtered and forwarded to the transistor as an amplifier. In the second transistor amplified RX signals to be routed to the Filter to return the signal is filtered and split into 4 parts, namely removing the two signals and two DCS-RX-RX GSM signal to be transmitted to the RF IC.

3. IC RF / IF RX signal Processing and adjusted to the frequency established by the VCO.

Signal transmission section (TX)
At this section, work on phones that work consists of several components, these components include:

1. Antenna
2. Antenna Switch
3. TX Filter (Filters)
4. IC PA
5. IC RF
6. VCO
7. IC Power Supply

To find out whether or not the work TX (transmission), can use light radiation, multitester, and make calls to numbers SOS / Emergency (to 112) without a simcard inserted.

How to do is check with multitester:

1. Turn on the phone with or without using the Sim Card
2. Perform outbound calls
3. Paste multitester near the antenna (calibration Multitester at 10V AC)
4. If the needle moves multitester, means the TX working.

Components of the work system TX

1. Form the VCO frequency to be processed by the RF IC to form four output signals, ie two-TX signal DCS and GSM Two-TX to be forwarded to the Filter TX (transmitting). VCO jg serve as Power Detector to regulate the voltage pulse from the RF IC sending data to the CPU.

2. In the fourth Filter output signal which is sent by the IC RF TX signal into two forms, namely GSM and DCS to be forwarded to the IC PA

3. In the second PA IC for transmitting the signals are amplified and then routed to the Filter TX.

4. In the Filter Both signals are filtered and forwarded to the Antenna Switch

5. Antenna Switch which serves as a terminal and combining both GSM and DCS signals to be transmitted via the antenna

As a whole section on Cell Phone Signal Audio IC assisted by the beginning of a signal amplifier noise coming from the reception (RX) to be forwarded at the beginning of Loud Speaker and amplifier noise signals originating from the microphone to be forwarded to goto the transmitting (TX) through IC RF / IF.

26 Mhz crystal serves as a signal generator to control the existing signal at the RF IC to IC Audio is sent in the AFC (Automatic Frequency Control) as well as a voltage regulator according to the needs of related components which are controlled by the CPU. Know the part of Your Mobile Device

continued …….   Read Part 2 Here

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source: ekohasan

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