COMPONENT AND FUCTION FINISH

13. VCO IC (Voltage Control Oscilator)
the function as frequency oscillator/generator that be sent to pass Tx(Tranceiver) and frequency that enter to pass part Rx (Receiver) so that being equal with radiated. beside that, this component also functioned as pulse voltage regulator from RF signal processor.

14. RX/TX 
as enter/out signal

15. LCD 
this component will functioned to display all activities from handphones, as media communication reads and write in handphone. 

16. KEYPAD 
this component functioneds as device input that give data command to cpu then processed and sent to other component related to handphone

17. INFRA RED 
infra red a tool that transfer data or program. But in general infra red used to send and receive data from computer to handphone or conversely. Infra red will work when facilities activate good in handphone and or in computer. But usually when computer that used kind laptop or notebox so this facilities detect of system operation at installation. Actually function infra red this is same as does data cable, only data cable direct linked will into handphone while infra red is not such. this apparatus work by using light infra red distance between handphone one with other may not far apart, must face to face, and doesn't shut a certain. 

18. BLUETOOTH 
this tool is used to transfer data or functioned as mediator between a equipment with other equipment. Facilities bluetooth exist in handphone usually used to send or get data from computer, handphone other, or conversely has also and use this facilities. The bluetooth function in handphone in principle same like infra red. simply procedure from bluetooth use frequency stripe or radiowave, for delivery distance or data acceptance doesn't like infrared, bluetooth has overplus can be used to send and get data concurrently at the time of same. beside that bluetooth has also surplus can be used without having to close to one another between sender equipment with receivers equipment, in general distance can achieve hundreds meter.

19. BATTERY 
the function as electricity current source to give electricity current in mobile phone. battery for handphone there what kind, that is: Nickel-Metal Hydrate (nimh), Lithium-Ion(Lion), and Lithium-Poly-Mer (Lipoly). 

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Receiver-Tranceiver Signal

Diagram Handphone

Part of Signal Receiver (RX) 
Part or component in mobile phone consists of several component is: 
1. Antenna 
2. Switch antenna 
3. Filter rx (filters) 
4. Transistor (lasing rx) 
5. IC RF
6. VCO 
7. IC Power Supply 
to detect that work or not in part rx (receiver), knowable by see from mobile phone in network setting selection, then choose menu manual in network choice. 

Procedure every component part: 
1. Signal received by antenna then to switch antenna as terminal 
2. Switch antenna will take two signals RF for handphone dual band), that is DCS-RX (1800mhz) and GSM-rx (900mhz), second signal sustained to filter as RX signal, signal rx be filtered and sustained to transistor.
3. In second transistor, rx signal be braced to can sustained to filter as RX signal RX signal to filtered and divide signal is 4 parts, that is take outside two signals DCS-RX and two signals GSM-RX that sustained to IC RF 
4. IC RF/IF mixing RX signal and appropriated with frequency from VCO 
 
Part of Signal Tranceiver (TX) 
Component in handphone (mobile phone) have fuction to tranceiver signal consists of several components, this component is : 
1. Antenna 
2. Switch antenna 
3. Filter rx (filters) 
4. IC PA 
5. IC RF
6. VCO 
7. IC Power Supply 
for detection that works or not part on TX (Tranceiver), can be used lamp radiation/ multitester. 
1. Switch on handphone by using sim card 
2.Do calling to 112 (emergency number) 
3. Put radiation lamp / multitester at elbow antenna part 
4. To multitester put to calibrate in 10V AC
5. When does lamp alive/ needle multitester move, mean TX work. 
 
procedure every part: 
1. Output VCO will be processed by ic RF, output ic RF is four signals, that is two signals DCS-TX and two GSM-TX then be follow up to filter part TX (Tranceiver) 
2. VCO also functioned as power detector to regulate pulse voltage from RF IC in data delivery to CPU. 
3. in filter fourth signal output at send by RF IC at form is two signals TX, that is DCS and gsm to contiuned to PA IC 
4. in PA IC second signal braced for Tranceived then sustained to TX filter. 
5. in signal second filter is filtered and sustained to part switch antenna 
6. switch antenna that functioned as terminal and bundle second signal DCS andGSM to radiated to pass antenna 

Part Stripe Scheme Signal (Rx/Tx) 
1. as a whole signal part in handphone is helped by Audio IC as voice signal beginning amplifier that comes from Receive part (RX) to continued in loud speaker and voice signal beginning amplifier that comes from microphone to continued Tranceiver (tx) passes RF IC. 
2. crystal 26 mhz functioned as signal generator to controls out signal in RF IC at send to audio ic in part AFC (Automatic Frequency Control) also as voltage regulator as according to related components need that controlled by CPU. 

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