Masalah Keypad Handphone

Phone keypad problem, there are several kinds, although very rare damage on the phone keypad. Here are some types of damage on the phone keypad in conjunction with the solution:
If either button is pressed but does not work, for example the number three, we check and test voltage (volts) on the third button, then the voltage (volts) which is 0 V out, it means there is no voltage (volts) out. damage can be caused by poor connectivity song, let us clean the brass plates are used to pad on the PCB by using ordinary pencil eraser we use. If still not successful then we do jumpers with: For instance is the number three is not working then this figure with figure 2 jumperlah 3 (horizontal) and number 6 (vertical), circular brass plate outside jumpers''between the number three to number two ( horizontally), then the scope of jumpers 'from' brass plate between the number three to number six (vertical).
All the buttons do not work 'alias hangs', then check out and first test whether the IC Power is still good, do it if warming IC Power is still good, or have it replaced with IC Power IC Power new if it is damaged. After that do the program (flash).
One of the keys when pressed so that the exit is not the same, for example we press the number 5 but the number came out first. We check and test voltage (volts) on the keypad 5, the voltage (volts) that comes out is 2.0 V. damage can be caused by poor connectivity, we do like the way the jumper on top.
One button is pressed causing the phone to die, if we inspect or test voltage (volts) emitted is 2.8 V.
The solution we are doing examinations and tests in advance on the company's IC ¬ Power, Heat Power IC if not damaged or have it replaced with a new Power IC if it is damaged, then do a program (flash) your phone's software.

No Charging Handphone

There is some possibility of damage: Damage occurs in the charging device (charging) battery itself, try your charger on a mobile device that have similar characteristics to identify damaged or not. The battery on your mobile phone can also be damaged so that the battery is not rechargeable. Check whether the connectors on the battery recharging your cell phone is still good. Then we just do inspection and testing of the phone itself.
If on your phone display appears a message "Not Charging" or cell phone refill process (charging), but indicators running without charging rechargeable batteries or refill process (charging) but refill indicator to remain silent so that we can ensure his Charge IC is damaged. Replace with new IC Charge
Mobile phones have been completed rechargeable (battery full), but still refill indicator, then the power IC damaged. Replace with new IC Power
The phone is not in a state rechargeable (charge), but refill indicator, then the software (SW) are damaged. Does the program (flash) on the phone with the same version.
The phone will be made each refill process (charge), hence IC IC Power Charge or damaged. Conduct examination and further testing on the phone to determine whether IC or IC Power Charge and then replace the damaged IC or IC Power Charge damaged.
After recharge (charge) phone with charger, no electrical leakage before power-on button is pressed, when you press the power button-on, the phone is not working. The cause of the problem is electrical leakage in power supply capacity. The goal remains the Power IC, IC UI, which is connected to the input voltage IC VBATT batteryt PA, units that are often damaged and can create problems is the Power IC, IC UI. Because IC Power is BGA, which is an integrated IC, then the method that is usually done is to release IC UI, then recharge (charge) returned the phone, note whether there is electricity kobocoran. If not, then the UI IC is damaged, if any, means IC Power corrupted. The problem is completed, after the replacement IC at the top.
We recharge (charge) the phone, then press the ON button, but the phone did not fire, no electric current into the phone. If so then do measurements on the R224, if the ends do not have the VBAT voltage of 3.2 V, the mean IC Power is damaged or there is poor soldering in the power IC. Replace damaged Power IC or re-soldering the IC Power
Try to flash your phone again

Hp tidak ada suara

On the phone is mute, if we use the phone, others we can not hear our voice, we can examine and test the components using MIC multitester with the following steps:
Use the manual on multitester xl scale, the positive pole cable connections and cable from the negative pole on foot multitester MIC component, if the needle moves so multitester MIC components in good condition. But if you do not move the needle on multitester then we need to replace the components of the MIC, for MIC of damaged components
Next we test runs of MIC components. To test the MIC kaponen point, we also use the manual on the scale multitester x1, connect the interface cable with MIC multitester on positive and negative poles, the needle moves multitester if, then the good line, but when the needle multitester not move, then the MIC broken line. We can make jumpers syste

CONTACT SERVICE Handphone Problem

Error on the phone like this means that the phone's software can run normally, and therefore the ability of IC Power (CCONT) can work. selfttest function runs when the power is switched on and run from flash. If there are selfttest fails, the text "Contact Service" will be displayed on the LCD. Errors in general:
MCU ROM checksum fails, try the program (flash) on your phone. If your phone is still not right after the program (flash), solder machine and try to update your phone software once more
CCONT interface failed, most likely due to damaged or defective soldering CCONT or less good. Mistakes are almost certainly caused by MAD or PCB (track) is damaged.
Parallel / serial COBBA failed, possibly caused by a damaged or defective IC COBBA soldering or less good. Try changing COBBA. If it still fails, the error caused by MAD or PCB (track) is damaged.
Check software

NO SIGNAL / NO NETWORK Handphone

Problem: When you insert a SIM card and turn on the phone, then there is no signal or a network that appears on the LCD cell phone. Repair procedure:
Check the antenna connector and antenna components, make sure the well connected. Especially if your phone is a phone with internal antenna, associated with the PCB mainboard via a pointer or two elastic contact, if both pointers this contact has a bad contact, a problem that arises is the lack of a network (no network) and a bad signal reception even missing signal (no signal). Especially with the engine knocking or falling into the water, the contact is bad and of oxidation will occur at the contact pointer. The antenna switch is the only way to rnenerima and send a signal, if damaged or soldering the pins are wrong, no problems will arise or the transmission network
Next we tried to find the network on the phone with manual methods, if this method fails in this manual to find the network, so that we can be sure there is a problem in RF IC (HAGAR), change the RF IC (HAGAR), then the problem will be completed
Network can be searched by manual methods but sometimes fail, can not even connect to the network. This phenomenon is caused by problems with RF IC (HAGAR), AUDIO IC (COBBA). If the module COBBA revealed the presence of errors, possibly caused by his unit and BGA soldering around the poor, or lack of flow, whereas most of the problems caused HAGAR bad units
If looking for a network with the manual method we only get one phone (one) operator / mobile service providers only, then there is a problem with IC VCO, replace the VCO IC was then the problem will be completed
If there is no problem with the manual method, check the flow path from the battery to PA IC, if there is no problem with the next point we check whether the IC component of the PA to function properly. We can use to test the IC multitester PA, PA IC, if it does not work properly, we replace the problem will be completed IC PA
After testing and we do repairs on hardware but still no signal / lost, then we moved on software. We flash your phone in accordance with the type of phone and software versions or previous mobile phone with a newer software version (upgrade)

Troubleshooting Dan Komponen utama

Here are some of the major components contained in the phone along with trouble shooting and functions:
Antenna Switch
Function: As the processor and voltage signals and to unite the RX and TX signals.
Trouble Shooting:
There is no network
Only one of the only network
Signal fluctuates
At the time of the death signal comes direct hp
Audio IC (COBBA)
Function: As an incoming voice signal processing of RF IC, then amplified and sent to the speakers, strengthening sound vibrations that have been modified in advance by the mic into electrical vibrations then forwarded to the RF IC, run the command from the CPU. At the IC there is also an audio PCM (Pulse Code Module) and EEPROM function to read the code of signals coming from mobile phone operators to meet the IMEI. It also serves to store permanent data such as IMEI, phone code, etc..
Trouble Shooting:
Contact Service
Blank black on the LCD
Signal fluctuates
Sepiker and die Mic
IC CPU
Function: CPU is an integrated set of electronic components and will function in accordance with their respective duties. This component has a very significant task, because this component is the brain and cell phones. In other words, the CPU is a mobile work center and systems.
Trouble Shooting:
Total death (Matot)
There is no network
Restart
Hp suddenly turns itself off
Contact Service
LCD blank
Power IC (CCONT)
Function: As a supplier of electrical voltage for each component according to their needs.
Trouble Shooting:
Total death (Matot)
Insert simcard
Contact Service
Restart
Not charging
Blank black on the LCD
UEM IC
Function: As a supplier of electrical voltage for each component according to their needs. At UEM IC is a combination of Power IC, IC UI, IC CHARGING.
Trouble Shooting:
Total death (Matot)
Bad Response UPP 2002
Error data 2 (Tornado)
Contacts retailers / contact service
Restic phone (IMEI check ???????)
Flash IC
Function: This component is a data storage medium on phones that are not permanent in other words can be changed or added to the data residing on a computer. This tool is the same function as the hard-disk on the computer.
Trouble Shooting:
Restart
Hp suddenly turns itself off
Contact Service
LCD blank
Number of deaths
One of the missing data dati menu
EEPROM (Electrically Programmable Read Only Memory Erase)
Function: As a data repository designed on the phone is not dependent on the presence of electrical current from the phone, because there are special battery or electric current which has been owned, these components typically store data such as factories IMEI1, IMEI2, Security code, the program version and date of manufacture. But for the latest release of the Nokia brand of mobile data contained in this component can not be changed.
Trouble Shooting:
Total death (software)
MCU (Master Control Unit)
Function: Existing data on the phone located in the audio IC, data is permanently or have been from the factory, such as: mobile phone version of the program, IMEI, year of manufacture, and phone codes.
Trouble Shooting:
Total death (software)
IC RAM
Function: This component is basically a data repository as well, but only temporarily, because this component is how it works depends on electric currents contained in the component. If the phone is turned off so that direct the data contained in the component will disappear by itself. These components are intimately associated with CPU activity. The greater the capacity of RAM it will be good Dula performance of the CPU, but if the RAM is damaged then the CPU can not work.
Charging IC
Function: This component will work automatically when the charging to work just to fill the battery voltage is controlled by the CPU through the controller IC.
Trouble Shooting:
Not charging
Nyedot batre
UI IC
Function: As instructed by the data controller on the CPU IC Vibrator, Buzzer, Led and behave as automatic switches in the phone.
Trouble Shooting:
Number of deaths
Nothing shakes
Ringing off
Led dead
IC PA
Function: As the signal voltage controller and the amplifier end of the TX signal will be emitted through the antenna switch components contained in the phone.
Trouble Shooting:
Then loses signal out
Not transmit
Finding network
Nyedot batre
Total Death (Matot)
RF IC (HAGAR)
Function: RX signal controllers (incoming) and TX (out), so that each part can work properly. This component consists of several parts, namely: IF, mixer, oscillator, detector, encoder, decoder, AFC, Tone Frequency and oppressive.
Trouble Shooting:
Finding network
Exit one network
Total Death (Matot)
Restart
On the LCD Blank White
IC VCO (Voltage Control oscillator)
Function: As an oscillator / frequency generator that will be sent through the TX (transmitter) and the frequency of entering through the RX (reception) to remain the same as those emitted. In addition, the device also functions as a regulator of voltage pulses of RF Signal Processor.
Trouble Shooting:
Only one card is used bias
For a network (serching)
Then loses signal out
LCD (Liquid Crystal Display)
Function: As a tool that will display all the activity and cell phones, as a communication medium to read and write in your phone.
Trouble Shooting:
Empty
Article messy
Rupture
Button
Function: As an input device that provides data to the CPU for processing and telephone orders will be sent to the related components in the mobile phone.
Trouble Shooting:
Empty
Article messy
Rupture
Battery
Function: as a source of electric current needed to deliver electric current on the mobile phone. Battery for mobile phones there are several kinds: Nickel-metal hydrate (NiMH), Lithium-Ion (Lion), and Lithium-Poly ¬ I-RI (LiPoly)
Trouble Shooting:
Ngedrop
During the call, direct hp die
LCD blinking lights
Charging failure

Signal Hilang

Unstable signal problems can sometimes be confusing when we're on the phone to make a function call is relatively important. Signal problem is actually caused by two things namely, the quality of the signal from the BTS and the condition of weak mobile phone operator itself, which indeed has a problem in it. If the signal beam BTS had no problems at all, it can be ascertained, the problem is caused by mobile phones. Phones that have problems with signals also have two possibilities. Guilty of a software problem or hardware. The first step must be done is to create a signal improved tuning software. If after tuning the signal in particular still have a problem, then the last step is to change the antenna switch components, RF IC, PA, Audio and more associated with weak cell phone signals. Switch antenna is weak, it does not mean replacement must be done. If owned by a very limited budget, then we can perform an antenna switch jumpers without changing IC PA. Equipment must be prepared in advance:
Tin solder 0.3 mm following
Flux Liquids
0.3 mm jumper cable

Steps should be taken:
Disconnect the phone casing stay PCB / Board Cell Phone
Prepare a jumper cable to connect the appropriate points in the picture, exactly in the IC PA
In the picture above, we did a jumper on the phone 33XX
After making jumpers, reunite parts of the phone as before.
Mobile phones can now be used to capture a better signal.
Trick antenna switch jumpers will this affect the ability of dual-band mobile phone into a band of only one, namely 900 MHz. This is very useful tricks to get around the limitations of funds. If you do not want to lose the ability to dual-band mobile phone into a single band only, then the alternative is to make the turn with a new PA IC. JUMPER DIAGRAMS ANTENAMMI attempts to provide complete and accurate information, but MMI is not responsible for mistakes / damages incurred during use of the information we provide.

	Noki GAGE QD	Nokia 90