All About Signal Problem

Nokia has a two-way system which means signal Transmite transmitting signal (TX), which means acceptance Received signal (RX) Some parts are linked here to do with the TX and RX is as follows:

PA (Power Amplifier)

Power amplifier or power amplifier transmitting signal (Transmite Strength) related here only thing pemancaraan signal only (TX) Duplexer or oft we call antenna switch. Combined between the TX and RX which allows us to make calls both directions simultaneously or concurrently.

The occurrence of signal processing incoming and outgoing. PA and Duplexer circuit which often causes death mobile phone (shut down) when we'll make a call.

HAGAR

Including receiver or RX series of 75% and slightly transmitting / TX

COBBA

Includes a series of mostly transmitting / TX relevant here: Robust transmit audio / sound is produced, so that often cause hp less harsh voice. Includes self test from the main processor (CPU), so seing the contak service in the event of damage.

Real Time Clock

As the name where the process in real time (frequency accuracy runs) damage to these parts will cause: The accuracy of speech or sound to be less precise (the beat or the tempo is slow) The accuracy of power on and power down becomes disturbed, causing the old HP switch.

CCONT

Is the part where the supply current to flow into masing2 manufactured components. Damage to this part will cause the HP die total.

FLASH IC

Is the part where the program generated data to govern the cpu do its work, especially here the command receiving and transmitting signals. Damage to this Ic leads to: contack service because the self-test failed. Bar signs do not signal even though the operator name out there. Booting failed Hp allows for the total dead

CPU (central processing unit)

Where are all the commands executed by this part started from the command transmitting or receiving signals. Damage to this part is sometimes even difficult to detect this way. The entire process above will fail also related damage to this CPU.

Damage most numerous and most annoying is the problem of signal. Any expensive phone with no signal is of no value. Also when carrying expensive mobile phone but the problem of signal even if it might embarrass the pembawa.Signal is a problem which is tricky for all cell phone technician. Signal mostly identical with the PA or PA IC, even though not one hundred percent correct. Signal problems have many links between one IC (components) with other components. To be able to solve problems of signal needed some absolutely necessary for every cell phone technician. Among them: Technicians must have knowledge about the function of each component, the second, test engineers must have tools and equipment repair, and the third, the technician must have more ability or knowledge a plus, meaning that engineers should be able to solve problems with different techniques.

There are Many diagnostic kinds of signal problems, including:

1. Weak signal

2. Signal fluctuates

3. Signal at a particular location

4. Signal 5 seconds

5. No signal

6. Signal 112 only

7. Signal drop

8. Pseudo signal

9. Signal certain sim

Initial preparatory steps:

1.reset or return on the initial setup, you can do through the menu and phone settings, then enter 12345.

2.call 112 only or network manually, when can the RF IC is still in good condition.

3.update on your mobile phone software. It could also downgrade whenever necessary and indeed the previous version was too high.

4.measuring stress on components such as PA IC, RF IC, IC AUDIO, is already getting the correct voltage.

When the initial step or the preparation we have done but the phone is still problematic, it can do the replacement component to the damage experienced by the mobile phone.

1. Signal weak, do the replacement of the IC PA, because this component to function as an amplifier.

2. Signal up and down, can occur because the VCO is weak, its reference function has been neglected.

3. Signal at a particular location, replace the IC PA, because the IC must use not original, or a result of its replacement antenna.

4. Signal 5 seconds, there is damage to the IC CPU, because the phone can fall, but if it were not for fall you can do flashing eeprom virgin, so that the phone be back to normal.

5. No. Signal, the phone fell more damage to the IC Audio, konverternya function does not work.

6. Signal 112 only, is the only signal from the RF IC, you can replace the IC PA because it is no longer function.

7. Signal drop, is caused by IC PA, although IC PA itself is still functional but the use of extremely high currents, can reach 600 mA.

8. False signal, the indicator looks good and full, but can not make calls, more due to the antenna, the function of connecting the disconnected.

9. Signal particular sim, in because the program or SW can be clear SP Lock and could also be due to the replacement IC PA IC no precision or not the original PA