Analysis of Short Flows in Nokia BB5 (part 2)

TAHVO Elimination
Disconnect the L2302, with these components removed, then the Vcore will be lost. Then check again, if the condition still the same? If so, it means there is no problem with Vcore for the RAP. When the heat was back to normal, then there are certain problems in RAPGSM (microprocessor).
Pull the L2301 and L2306, with these components removed, the input TAHVO from Vbatt will be lost. This led to a series of charging does not work. Check back, if the condition still the same? If so, it means there is no problem at TAHVO. If the heat back to normal, then it means there is a problem in TAHVO.
PA (Power Amplyfier) elimination
Pull Z7520, by depriving these components, Vbatt Voltage to the PA will be lost. Check back, if the current consumption to be normal, then there is a problem in PA.
RF IC (AHNE) elimination
Pull the L7502, with these components removed, the Vbatt voltage to the RF will be lost. If the current consumption to be normal, then there is a problem in the RF. If the flow remains high, then the problem is not found in RF. Replace the L7502.
Bluetooth IC elimination
Pull the L6077, with these components removed, the Vbatt voltage to the bluetooth IC will be lost. If the current consumption to be normal, then there is a problem in the bluetooth IC.
Camera IC and Regulator elimination
Pull L3303, if the flow becomes normal, then there is a problem in the camera or camera ICs. If the flow is still high, pull the L3304, if the flow becomes normal, then there is a problem in the camera regulator (N3300).
For the DSP on RAPGSM that obtain VIO voltage, the way to eliminate by pull RAPGSM. Then look the current reaction on Power Supply or feel if the RETU still hot? If it is back to normal, it means there is a problem in RAPGSM. If the RETU still hot, or power supply current is still high, it means the problem is not found in RAPGSM.
There are two possible short on RAPGSM, from foots of the RAPGSM or from RAPGSM module itself. If the short occurs on its feets, reball the IC. But if after reball still same, change the RAPGSM.
There are three short categories on mobile phones, namely :

1. Short when the battery installed
2. Short after pressing on/off switch
3. Short when make a call

To overcome the condition number one, check and eliminate the components that obtain the voltage directly from Vbatt like PA, RETU, TAHVO, RF, etc.
To overcome the condition number two is more difficult. Check and eliminate the components that obtain the voltage from regulator like camera regulator, led regulator, etc.
The condition number three, the damage generally occurs in PA, because PA work when make a call or receiving a call.

Analysis of Short Flows in Nokia BB5

This analysis is applied to Nokia BB5 mobile phones that use RF (AHNE), using the processor RAPGSM v1.1, not RAP3G.
RAPGSM v1.1 is included in the CMOS processor (MOSFET) which is a series combination of Field Effect Transistor (FET), Vdd (drain) as a positive voltage, Vss (source) as a negative.
RAPGSM need two types of voltage, namely :

1. Microprocessor Voltage, Vcore = 1,4 V
2. Data Signal Processor Voltage, VIO = 1,8 V

In RAPGSM have a 19 foot VddCore obtain positive voltage 1,4 V (drain) of the TAHVO, and 19 feet VssCore negative voltage (source) to ground, and 11 feet that obtain VddIO voltage 1,8 V.
Approximately 50 feet from the input voltage (Vdd/Vss) for the RAP, the common short-circuit on its feet. Therefore, most likely caused by this RAPGSM. However, if we want to do a more precise measurement, it is very difficult if only done by injecting a voltage or a heat feeling.
Why? because in RAPGSM IC's module, on input Vdd/Vss, there is a protection diode works as switching when short. So, when RAP short, not hot. However, the heat occurs at a regulator, which is RETU or TAHVO.
Therefore, we could either make a conclusion. So, if RETU heat, it doesn't mean that experienced short RETU.
Therefore, the proper way to do an analysis is to perform elimination. Elimination is to decide the voltage on one of the suspected components, and then compare it back to the power supply.
To be continued ....

Upgrade Nokia Mobile Phones Firmware Via USB

This session will discuss how to update Nokia phone firmware without using the box. The trick is to use the data through the USB cable. Before you start, make sure you have met these requirements :
To install and run Nokia Software Updater application :

• PC with 1 Ghz or higher pentium-compatible processor
• At least 256 MB of RAM (memory)
• Windows 2000 (SP4 or later) or Windows XP (SP1 or SP2)
• Administrations rights on the PC while installing
• Internet connection

To connect your phone to a PC :

• Fully charged, compatible Nokia phone
• Compatible Nokia USB connection cable
• Compatible USB port on your PC

Next step is back up data, personal data such as contacts, photos and messages stored in phone memory will be deleted during phone software update. It is strongly recommended that you back up this data to your memory card before updating your phone software.
To back up data to your memory card, follow this steps :

• Select Tools - memory (from the main menu)
• Select Options - Back up phone memory

To restore info to phone memory :

• Select Tools - memory (from the main menu)
• Select Options - Restore from card

After everything is ready, do the software update and follow the next steps. For the record, if you file to do so, mobile phones will be die. But, don't worry, you can fix it by using the box. Good luck.

Upgrade Nokia 3110c to Nokia 3500c

Nokia is a brand of mobile phones is very popular in the world. In the market, mobile phones Nokia has been circulating in various types. One of them is Nokia 3110c.
Damage that often occurs in Nokia 3110c is blinking and restart (at least that's what i often find). Maybe for people who have had experience in the world of mobile phone repair, damage symptoms of restart and blinking very recognizable, ie mobile phone screen flashes white.
To overcome this damage, we can do reflash. Well, at the time, we are not going to talk about how to repair damage to the Nokia 3110c mobile phone, but that we will discuss here is how to upgrade firmware from Nokia 3110c to the Nokia 3500c.
Ok, to do so, let's follow the following steps :

1. For security, back up first RPL and PM before upgrade.
2. Flash your Nokia 3110c using Nokia 3500c firmware
3. Write Pm
4. Unlock
5. Reset full factory

After completion, the themes, screensavers, color schemes and ringtone will be the same as Nokia 3500c. One more thing that's most important, the quality of the Nokia 3110c's camera will be equal in quality to the camera Nokia 3500c which has a resolution of 2.0 megapixels.
The following are log information from the upload process is never done.

Download log file

Good luck!

Nokia 2100 and Nokia 3610 Contact Service Problem

Writing this time will discuss about the problems that occurs in Nokia 2100 and Nokia 3610. This time, the problem will be discussed is the damage to contact the service.

The background of this issue raised in the blog is because a lot of questions coming to us to overcome these problems. Among the questions coming to us, most damage occurs when they will replace the PPM files, but after the PPM files replacement process is complete, a new problem comes, the contact service.

This is a lot happening on the mobile phone Nokia 2100 and Nokia 3610. The cause of this damage is the original IMEI to the IMEI plain out of sync.

To overcome this damage, we can use the flasher tool commonly used by mobile technicians, the UFS Tornado. The first step, after you connect the phone with UFS Tornado, please see the information about the mobile phone by clicking the info menu on UFS Tornado interface.

Look carefully at the Cobba, what number is written? if the writing is -31, meaning the problem is not found in IC Cobba, but if the writing is -700, meaning Cobba IC is damaged. All right, we will discuss today are issues that are not on the Cobba IC.

Nokia 2100

Erase flash :

• Start 00200000 end 003FFFFF and
• Start 003F0000 end 003FFFFF

Nokia 3610

Erase flash :

• Start 00200000 end 005FFFFF and
• Start 005E0000 end 005FFFFF

Furthermore, you do flashing process as usual in the MCU and PPM. When finished, rebuild IMEI, adjust the IMEI number with the original, then do unlock. Good luck.

Damage around the Nokia E 70 (part 2)

We continue the discussion of the damage that often occurs on the Nokia E70.

T7502 (Tx Coupler)
This component is often called the balance unbalance. This component serves to create a balance signal to unbalance. This component works on 1800 Mhz frequency. If components are damaged, will cause the RF Tx signal at a frequency of 1800 Mhz impaired. This situation will create a mobile phone only works on 900 MHz frequencies, but when transferred to the frequency 1800 MHz, mobile problematic. This resulted in signal to arise drowned.

Z7504 (Tx Filter 900 MHz)
This component serves to filter the RF Tx signal to be emitted by the Power Amplifier. This component also change the RF signal to be balance unbalance. If this component is damaged, the symptoms that arise as damage to the T7502, but the phone problem at 900 MHz.

N2200 IC Power RETU
These components not only function as a supplier of electricity, but these components also regulate the function of audio, data SIM Card, vibrators, and much more. If this component is damaged, the symptoms that often arises is the mobile phone becomes dead, the audio problem, vibrators, and others. Please note that almost all IC contained in this mobile phone to take electricity from retu.

Damage around the Nokia E 70 (part 1)

In this section, Phone Repairing will discuss about the damage that often occurs in the Nokia E 70 mobile phone. The first part will be discussed is the Signal. The main components of this section is Z7503 (antenna switch), N7502, X7501 (antenna connector), X7502 (antenna connector), T7502 (Tx coupler), Z7504 (Tx filter 900 Mhz), N2200 (IC Power retu), B2200 (crystal osc 32 Khz).

Z7503 (Antenna Switch)
Antenna Switch is a component that can be easily damaged, very vulnerable if you have a strong impact. This component serves as a switch for the RX signal to the TX signal so that only one antenna is required to accommodate the needs of both the RX series (radio receiver) and TX (radio transmitter). If problematic, can cause no signal receiver or transmitter. In addition, can also cause the RX signal becomes weak, it is difficult to make calls.

N7502
Power Amplifier or sometimes called final amplifier is a component that serves to strengthen the signal is modulated TxRF, so it has enough power to reach the nearest base stations.

These components are relatively often damaged. In the event of damage, mobile transmitter system would be disrupted. Damage to these components will result in mobile phones can not make calls, not to call, no signal, wasteful batteries and others.

X7501 (Antenna Connector)
This connector is often problematic when the mobile phone with a hard knock. This component serves to connect the antenna to the PCB. If the connector is dirty, or if the antenna is not connected to this connector, will result in a weak signal, it is difficult to call and difficult to accept the call.
In the process of improvement, to ensure that the antenna is connected properly to the connector, we can use the 8 cm long wire that directly soldered to the antenna connector. If the signal improves, it is certain that there is damage in this section.

to be continued.....

Samsung Mobile Phone Secret Codes

The next mobile code which we will discuss is the code for Samsung mobile phone. Some of the following code is useful to display the software version, testing ringtone, reset phone and so on. Please refer to the following code:

1. *#06# = code to show IMEI number
2. *#9999# or *#9998*9999# = code to show the software version
3. *#9998*8888# = code to show hardware version
4. *#9998*76# = code to show production number
5. *#9998*288# or *#0288# = code to check battery status
6. *#0246# or *#0377# = code to check memory status
7. *#8999*638# = code to show network information
8. *#9998*523# or *#0523# = code to set screen contrast
9. *#8999*5646# = code to change operator logo
10. *#0289# = code to test ringtone
11. *#0842# = test vibrate
12. *#0746# = code to show SIM Card information
13. *2767*2878# = lock the phone
14. *2767*3855# = code to reset memory, don't forget to remove SIM Card
15. *#9998*5282# = Java Menu
16. *#9998*4357# = Help Menu

That's some code that can be used in Samsung mobile phones, may be useful.

Motorola Secret Codes

The next secret code is a secret code for Motorola mobile phone. Immediately, we refer to the following code:

1. *#303# Ok = secret code to change phone language to English
2. *#300# Ok = secret code to show mobile phone software version
3. *#301# Ok = secret code to test keypad
4. 1234 Ok = mobile phone default code
5. 19980722 Ok = master unlock code for phone and SIM lock
6. *#0000# Ok = restore settings
7. *#402# Ok = contrast

Good luck.

Sony Ericsson Secret Codes

After the first we know the secret codes for Nokia mobile phones, now we'll find out some secret code for Sony Ericsson mobile phones.
The following codes are some useful secret codes for you to manage Sony Ericsson mobile phones. Please read:

1. *#06# is code to show IMEI Number. This code is same for all Mobile Phones.
2. *#0000# is code to reset mobile phones' language to English
3. >*<<*<* is code to show service menu and software version. Through this code, you can check the function of several Sony Ericsson Mobile Phones component like Microphone, Buzzer, Speaker, etc.
4. <**< is code to lock SIM Card. By using this code, your SIM Card cannot be changed. If you want to reset your mobile phones, you must unlock your mobile phone using flasher or unlock code.
5. *<<* is code to lock provider service
6. **04*0000*0000*0000# is code to access your mobile phone without Sim Card.

That's some code on Sony Ericsson mobile phones, may be useful!

Secret Codes for Nokia Mobile Phones

In this section, Phone Repairing will provide some free unlocking codes for Nokia mobile phones. Free codes that will be discussed below consists of a secret code to unlock the phones, to know the secret codes IMEI number, secret code to view the software version, secret codes to view private numbers and more.
Let us discuss one by one :

1. Code to see the IMEI number is : press the button *#06#
2. Code to view the software version, manufacture date and type of software compression : press *#0000# or if not work try : *#9999#
3. Code to view call waiting status : press *#43#
4. Code to view private number that contact your mobile phone : press *#30#
5. Code to change the operator logo (especially for mobile phones Nokia 3310 and 3330) : press *#67705646#
6. Code to show simlock status : press *#746025625#
7. Code to set phone settings to factory settings : press *#7780#
8. Code to show mobile phones serial number, production date, purchase date, recent repair date : press *#92702689#
9. Code to show security code : press *#2640#
10. Code to show bluetooth IP address : press *#2820#
11. Code to activate EFR with the best sound quality : press *#3370#
12. Code to activate EFR with lowest sound quality : press *#4720#

Thus some secret code for Nokia mobile phones, but among these codes, some codes are only valid for certain types only. Thanks.

Nokia 3650 Software Problems

Nokia 3650, Nokia 3660, Nokia 6600 and Nokia 7650 is the type of first-generation Nokia mobile phones that use Symbian operating system. Symbian operating system is very vulnerable to viruses, therefore, on mobile phones using Symbian operating system common to the software problems caused by viral interference.

Cases that we discuss this is the case of damage to the software the Nokia 3650. Symptoms that occur are mobile phones can not playing music. When the music player application is activated, the application can open but can not play music.

To overcome this, you must format the memory card and mobile phone. As for how to format the phone can be done in two ways, first you can use a box like UFS Tornado Flasher, then do the format on the user area. The second step is to perform manual format by pressing the code *#7370# ( mobile phone switched on by using the SIM Card ).

After you format the phone and memory card, reinstall the music player application and all will return to normal.