Thursday, May 31, 2012

Nokia 5130 xpressmusic Insert Sim Card solution

Here's the full tracing line paths for repairing Nokia 5130 xpressmusic Insert sim card problem. This solution shows the primary tracks paths for tracing the sim connector pin to the inner part of the circuit component such as the power IC(AVILMAS)
This guide may help fix  insert sim card that shown on the LCD screen display even when tried inserting any kind of well working sim card on it. 

Nokia 5130 xpressmusic  Insert Sim Card solution

The highlighted spots indicated on the picture guide above is the sim voltage supply (VSIM) that is feed from a chip capacitor near the power IC. All the remaining signal such as the clock, reset and data were all connected directly to the inner solder ball bumps of the power IC. So the only way to trace this lines is to remove the power IC then reball it and inplace it back again.

How to Repair Cellphone Not Charging, No Reponse, Charger Not Supported Problem Issues

There are few types of charging problem issues like Not Charging, No Charging Response and Charger Not Supported.
A problem issues with "Not Charging" shows on a display when a charger is being plug-in, this problem occurs when a required current or voltage is not enough to boost up  and charge the mobile phones battery.
One reason of this problem is  a faulty BSI Line, a BSI line is a Battery Size Indicator that tell the charging control circuit how's the batteries working status.

The battery has a BSI output indicator terminal that connected to its negatives terminal with  desired value of resistor on it.
battery Bsi

One other charging problem issues is the No charging response when a battery charger is being plug-in, it stays no response or nothing happens.
One reason of this is a faulty protection circuit section. this happens when there is no voltage reach to charging circuit indicators and controls. If the protection circuit breakdown this will result to "charging no response" situation. You need to check each components for short and open circuits. You may start from the fuse then to the coil and the diode.
Charger Not Supported problem is cause by a faulty BTEMP thermistor component, BTEMP stands for Battery Temperature, This is the one that monitors the battery temperature status during at charging status, if this one having a problem , it wont allow any charger to proceed to charging stage.
This all, is only a brief explanation of how charging problem issues occurs, while charging the mobile phones .
There are lots of ways on how to troubleshoot each and every kind of handsets. Hope at least, this one let help you understand how charging problem issues occurs, and by this you can gain ideas to move into a stage where you can practice how to troubleshoot this kind of issues.

LG Mobile Phones Flashfile Firmwares

LG Mobile Phones Flashfile Firmwares for the following Unit/model handsets:
a7150, b1300, b1200, b200, b2070, b2100, b2150, b2250, c1100, c1150, c1200, c1400, c2100, c2200, c2500, c3310, c3320, c3380, c3400, c3600, f1200, f2100, f2200, f2300, f2400, f2410, f3000, f7100, g1500, g1600, g1610, g1800, g3000, g3100, g5200, g5220, g5300, g5310, g5400, g5500, g5600, g7000a, g7030, g7050, g7070, g7100, kc550, kc560, kc780, kc910, ke500, ke590, ke600, ke770, ke800, ke820, ke850, ke970, ke990, kf240, kf300, kf350, kf510, kf600, kf700, kf750, kf755, kg110, kg120, kg130, kg190, kg200, kg210, kg225, kg245, kg270, kg276, kg280, kg288, kg290, kg296, kg300, kg320, kg370, kg800, kg810, kg920, km380, km500, kp105, kp110, kp130, kp152, kp200, kp220, kp265, kp320, kp500, ks20, ks360, l342i, l1100, m4410, m6100, p7200, s3500, s5000, s5200, t5100, w3000, w5200, w7000

 Download All LG Firmware Version


Wednesday, May 30, 2012

SMD Capacitor

The types of capacitor which is commonly used in small space circuit like the cellphone uses the Tantalum type of capacitor, 
Tantalum capacitors are used in smaller electronic devices including portable telephones, pagers, personal computers, and automotive electronics.
It also offer smaller size and lower leakage than standard. .
There are two types of Capacitors used in Mobile Phones Circuits,
The Polarized and Non-Polarized Capacitors.
This are the Capacitors may look like  that are being used in mobile phones circuit.


The Polarized Capacitor 
Tantalum Capacitors which is polarized, and may be used in DC circuits. Typical values range form 0.1uF to 470uF.
Standard Tantalum values change in multiples of 10, 22, 33, and 47. Normal Temperature Coefficient [TC] for Tantalum Capacitors is +5%.
Polarized capacitors are typically used in large voltage situations, such as DC line filtering to reduce noise related to uneven voltage levels after rectification from an AC source. Mainly measured in microfarads. Polarity is critical to these devices. They are marked with the voltage rating (usually double the circuit voltage used) as well as the farad marking. 

Non-Polarized Capacitor
Non-polarized are similar to polarized except the plates are similar metal. 

Polarized caps are typically used in large voltage situations, such as DC line filtering to reduce noise related to uneven voltage levels after rectification from an AC source. Mainly measured in microfarads. Polarity is critical to these devices. They are marked with the voltage rating (usually double the circuit voltage used) as well as the farad marking. 

non-polarized caps are typically used in low voltage situations, both AC and DC. Polarity is not critical. Measured in pico farads typically. 
Decimal multiplier prefixes are in common use to simplify and shorten the notations of quantities such as component values.
Capacitance, for example, is measured in Farads, but the Farad is far too large a unit to be of practical use in most cases. For convenience, we use sub-multiples to save a lot of figures. For example, instead of writing 0.000000000001 Farads, we write 1pF (1 picofarad).
The more common prefixes and the relationships to one another are as follows.
Abbrev.PrefixMultiply byor
1000 pico units=1 nano unit
1000 nano units=1 micro unit
1000 micro units=1 milli unit
1000 milli units=1 unit
1000 units=1 kilo unit
1000 kilo units=1 mega unit


All components differ from their marked value by some amount. Tolerance specifies the maximum allowed deviation from the specified value. Tolerances are normally expressed as a percentage of the nominal value.
For example, a component with a marked value of 100 and a tolerance of 5% could actually be any value between 5% below the marked value (95) and 5% above the marked value (105).

Nokia 1280 Keypad Ic Jumper Solution

How to Identify Capacitor's Symbols and Layout

There are two types of capacitors, the Polarized and the Non-polarized. The Polarized is indicated with  ''+'' positive and ''-'' negative, meaning this cannot be change into its mounting position from a certain connection of a circuit polarity, The ''+'' positive is for the voltage supply line B+ only and the '' - '' negative is for the grounding lines. The capacitor will blown up if putting it into a non desired polarity position.
Non-polarized capacitor is a non-polar or without polarity meaning its position can be change without damaging it.
In Schematic Diagram it is stated as letter ''C'' stands for Capacitance then a mounting code and Capacitance value.
The Polarized indicated with desired maximum voltage value. like for example
C7597 1000mF_14V ,
the ''14V'' is the desired maximum voltage for that said capacitor.
While the Non-polarized labeled without desired voltage.
example: C2567 22pF

LCD Display Problem repair solution on Nokia 5000d

nokia 5000 lcd display jumper ways

This solution guide will show you the pin configuration of the LCD display connector of where and which particular components it is being connected for an easy tracing procedure method. 
The LCD display circuit comes with a display driver IC, which is a good  spot to start to check, test, rework and replace.

LG KP500 IMEI Change Without Any Box

1st if you want unlock:
step by step to unlock KP500

1- instal lg drivers, i think that this one is enough:

then connect mob with usb cable without battery,sim or any memory(mmc) it will find new hardware, let it install drivers auto

after install drivers remove phone from usb port

2- donwload this:

extract and put the file "KP500.flb" in c:\

3- open the software KP500-Utils-EN.exe

Press O ( Backup STATIC_EEP...)

then ENTER

then write: \\.\USB1 and press ENTER

then write: C:\KP500.flb and press ENTER

then write static_eep and press ENTER

then connect phone to usb and wait, it should create 2 files in Lg-utils folder, one with name STATIC_EEP with 80kb and other STATIC_EEP.big

delete the STATIC_EEP.big file

and copy STATIC_EEP file to c:\

4- then open again KP500-Utils-EN.exe software if you close it

write P (Unlock) then ENTER

then write c:\STATIC_EEP and ENTER

unlock code will appear

now turn on the phone, type 2945#*71001#

enter in UNLOCK SIM then NETWORK LOCK then it will ask you for code, type the code you got then phone unlocked

(to create KPXXX.flb files you should read this thread till step 3)
(after step 3 you dont need to read more, you have one or two .flb files then all you need to do is pick the bigger .flb file and copy to c:\ and

rename it to KPxxx.flb then unlock the same way as KP500 instructions

Nokia C6 Format Soft Reset - Hard Reset to Factory Settings

How to format or reset the Nokia C6 to factory fresh default settings.
This instructions below is a guide on how to reset the device. 
Note: This process may delete  the files you installed on Nokia C6. This may only advisable if the phone experiencing frozen or hang problems, burned out by excessive use or after installing 3rd party applications. You may need to back up all important data stored on the phone before you proceed,

Nokia C6 Soft Reset:

This will not harmed your data . Soft reset only restores .ini files from Flash ROM on board memory of your Nokia C6.

1.). Dial *#7780#

2). Press Ok/Yes

Nokia C6 Hard Reset
This will delete your data and installed applications. Hard reset will fully restore your Nokia C5-03 to default factory setting.

1). Turn the Nokia C6 OFF

2). Remove  the battery and reinsert it back again, then Turn it ON.

3). Dial this numbers *#7370#

4). Then Press Ok/Yes

Nokia C6 Hard Reset through button combination.

1). Turn the Nokia C6 OFF

2). Pull out the battery and reinsert it back again, then Power it ON

3). Simultaneously  press and hold *+3+Call Button (green/ok button)

Samsung smiley T359 Hard Reset Procedure

Here's a step by step instruction on how to factory reset and restore the Samsung Smiley T359 to it original default settings.

 Do a back-up copy of all your installed data on the device for it will be wipe out in this process.

To reset the phone through menu settings:

1. From the Main Home screen, Press menu
2. Select Settings
3. Select Reset Settings
4. A highlight option and highlight All will be presented, you may choose by using the red button to mark the selection.
5. Select and Press Reset
6. Enter the password if prompted, the default is 1234
7. Then confirm

or use this method: type*2767*3855#

Samsung Galaxy TAB GT-P1000 Hard Reset Procedure


Here's the instructions on how to hard reset the Samsung Galaxy TAB GT-P1000. Please do have a back-up copy all of the important documents stored on the device, it will be all deleted including any 3rd-party applications installed on it. 

Resetting the device through Home Screen, this may hrlp to fix if the phone experience some hangs up or freezing if opening some applications.
Samsung Galaxy TAB GT-P1000 Hard Reset
To reset the phone:
1. Select Settings
2. Select Privacy
3. Select Factory Data Reset
4. Then select Reset Tablet

If the Samsung Galaxy TAB GT-P1000 is frozen or unresponsive, you can do hard reset through button key combination.

To hard reset:
1. Turn the  Samsung Galaxy TAB GT-P1000 Power OFF
2. Press and Hold the Volume Down and Briefly press the Power button.
3.Release the Power button button when the Samasung logo appears.
4. An additional menu will appear, just follow the whole instruction to hard reset the device.

The device will then reboot, after this process been done and back to its original factory default settings.

posts Blackberry bold 9000 keypad ways solutions

This morning I shared trick jumpers to problems keypad on blackberry bold 9000, probably from one of the readers of this blog, is currently experiencing problems the keypad on the blackberry bold 9000, on a phone keypad damage usually occurs on hardware factors, there are some phones have a problem of damage keypad is caused by software, but it was only a few phones and not all of them caused by damage to the software and not all of them caused by hardware, but this time that I share is the destruction of the keypad on the blackberry bold 9000 caused by hardware, ie, if there is one lane keypad the end, you can do with jumpers according that you see in the image above

Nokia C1-01 Charging Solution

Nokia C1-01 Charging Solution

Nokia 1208 Blue display solutions

noki phone in 1208, is a class of low-end phones, and this ponssel often experience some problems, especially damage to hardware, from local damage mode, the lights went out, even to damage to the screen, which looks blue screen, there are various ways to repair every cell phone, but not yet certainly damage can be overcome in the same way, although having the same type of damage

well for that, am I here want to share to you about how to repair nokia 1208 cell phone were damaged, blue display. I do it? try you noticed the image above

nokia 7230 full solution

Nokia 7230 Charging, Mic, Speaker, MMC, Network, Signal, Jumper Ways Solution download

How to Check Basic Electronic Components Using a Multi-Meter

How to Check Basic Electronic Components Using a Multi-Meter 

Basic electronic components such as resistors, capacitors, diodes and transistors are widely used in any electronic devices and gadgets. Knowing how to conduct a test on this components using a multimeter would give you an idea on how to trouble shoot and repair any defective cellphones or electronic equipments at home. Below are some basic D.I.Y. regarding proper testing of this components using a multimeter.

How to Check Resistors?

Read the indicated  code value indicated in Schematic Diagram then select the Ohm-scale within but not way below the indicated value. A resistor is good if its resistance is close to the indicated value.Tolerance should be considered with the ohmmeter reading. While, no resistance reading at all on the ohmmeter scale settings means that the resistor is open. A zero resistance reading on all ohmmeter scale settings means that the resistor is shorted. 

How to Check Capacitors?

In most cases, a capacitor fails due to the deterioration of the dielectric material between its plate.Defective capacitors can have an internal shorted terminals, excessive leakage and degradation of capacitance meter. For an electrolytic capacitor (capacitors with polarity), short the terminal capacitor to discharge it prior to testing.

To test a capacitor, set the multimeter to Rx10 or Rx1K scale. Connect the tester negative probe to the capacitor positive terminal and the positive probe to the negative terminal. 
A good indication for electrolytic capacitor shows the meter needle deflecting towards zero and moves back again to infinite resistance position. 
For ceramic, Mylar and other capacitor with a capacitance with less than 1.0 uF, the meter will not deflect at all. 
A defective indication for an electrolytic capacitor shows that the meter will rest on zero and remain stationary at a point which is an indication that the capacitor is shorted.

How to Check Diodes?

Set the multimeter knob to any of the resistance position (x1, x10, x1K or 10K ohm ).Connect the positive probe to the anode and the negative probe to the cathode.Then connect the positive probe to the cathode and the
negative probe to the anode of the diode. A good indication in the first procedure will show the meter deflected very little or may not deflect at all.
And in the second procedure, the meter will deflect towards zero.The actual resistance reading is the forward resistance of the diode. 
A defective indication shows that the meter won't deflect at all even when the probes are reversed. Or the meter deflects at the same time or almost the same resistance reading for both steps.

How to Check Transistors:

Bipolar transistors are usually checked out of a circuit by means of an ohmmeter. When it is desired to check for the resistance across the transistor emitter and collector, NPN or PNP, ohmmeter probes may be connected either way. A good transistor will show above a reading above 1000 ohm.

How to determine if it is NPN or PNP transistor?

To determine the correct terminal of the transistors, set the range selector to x 1 or 10 ohm.Connect the positive probe to the emitter and the negative probe to the base of the transistor. Note the reading interchange the connection of the probes to the leads of the transistor.

Base your conclusion on the table:

  Emitter------- --   Base---------- Less than 150 ohm ------Transistor is NPN
 Base --------------Emitter --------Infinity ----------------Transistor is NPN

-Emitter------------Base ---------Infinity   ----------------  Transistor is PNP
Base --------------- Emitter --- - Less than 150 ohm -------  Transistor is PNP
Some defective indications of transistors: Resistance between any pair of the terminals is less than 10 ohms, means that the transistor is shorted. Resistance between base and emitter or base collector for both the forward and reverse application of ohmmeter probes is infinity (meter needle don't deflect), means that the transistor is open. Transistors overheats (except power transistors) during normal operating condition means that the transistor is shorted.

 How to Check an LED ( Light Emitting Diode)

Set the Muti-meter to x1 connect the positive probe to cathode and the negative probe to anode. The good and working LED will then light up or glow, a busted LED will not.

How to Check a Coil?

Set the multimeter to X1 a good and working coil have a reading approximately point to zero ohms, without any reading means the coil is open or busted.

How to Check a Fuse?

A blown SMD Fuse is not visible to our naked eye, just set the multi-meter to x1 and put both test probe to both end side of the fuse. A full reading here to zero or continuity check is full. without any reading means the fuse is already busted.

How to Check IC chips (Integrated Circuits)?

IC Chips is hard to determine faulty by using only a multi-meter, some advance equipment like the one that the manufacturer used during their productions. However; you can determine a faulty chips by some few experiences when it comes to troubleshooting, One techniques is that by comparing two same components from one another. like for example; if one chips is suspected to be faulty, then by replacing it with a good and working same chips, you can now determine it if the said chips got a problem. It is a trial and error method at first; but as long as your experience and knowledge skills increases, you can determine it more quickly and accurately.
Further, we will tackle this issues and give you some tips and tricks.

Soldering and Desoldering Tools

Soldering Iron
A soldering iron is a tool normally used for applying heat to two or more adjoining metal parts such that solder may melt and flow between those parts, binding them securely, conductively and hermetically.
A soldering iron is composed of a heated metal tip and an insulated handle. Heating is often achieved electrically, by passing an electrical current (supplied through an electrical cord or battery cables) through the resistive material of a heating element. Another heating method includes combustion of a suitable gas, which can either be delivered through a tank mounted on the iron (flameless), or through an external flame.
Some soldering irons heat up and cool down in a few seconds, while others may take several minutes.Soldering LEAD
 Soldering lead is used to bond or connect electronic components. 
Solder is a fusible metal alloy with a melting point or melting range of 90 to 450 degree Celsius (190 to 840 °F), used in a process called soldering where it is melted to join metallic surfaces. It is especially useful in electronics . Alloys that melt between 180 and 190 °C (360 and 370 °F) are the most commonly used. By definition, using alloys with melting point above 450 °C (840 °F) is called brazing. Solder can contain lead and/or flux but in many applications solder is now lead free.

While it is possible to do some wiring without soldering connections, soldering is the preferred approach. Proper soldering is easy with the right tools and techniques. One item that is critical is the right solder. DO NOT use the environmentally friendly lead free solders, they don't work worth a damn. Even in carefully controlled industrial conditions, lead free solders produce inferior connections. As much as the politicians backed by environmentalists would like to, they can't legislate metallurgy.
Soldering Paste
Solder paste (or solder cream) is used for connecting the terminations of integrated chip packages with land patterns on the printed circuit board. The paste is applied to the lands by printing the solder using a stencil, while other methods like screening and dispensing are also used. A majority of defects in mount assemblies are caused due to the issues in printing process or due to defects in the solder paste. An electronics manufacturer needs to have a good idea about the printing process, specifically the paste characteristics, to avoid reworking costs on the assemblies.

Characteristics of the paste, like viscosity and flux levels, need to be monitored periodically by performing in-house tests.
Soldering flux Soldering flux is just a safe, convenient acid for dissolving the oxide skin off the metal
you want your solder to wet well. Also dissolves oxide off the liquid solder, making it
less crusty and therefore more shiny.

"Acid" flux is the stronger class of flux; it has something like hydrochloric acid in
it. (The paste form has zinc chloride.)
This is good for making difficult oxides dissolve so difficult metals like stainless
steel can be solder-wetted.
But the acid can hang around later trying to corrode the metal it just cleaned for you.
So for electronic stuff we mostly do not use it.
If we do, we scrub it off with things like toothbrush, water, soap, alcohol, baking soda,
to minimize acid residues.

The flux built into most solder wire is called rosin flux.
I think it is an organic acid (so is vinegar, and tart-tasting "citric acid"),
stuck onto larger molecules that melt only at soldering temperatures.
That is the clear yellow-brownish plaque that sits on the solder's surface when you are
It does the same stuff as acid flux, but it is milder two ways.
It is only strong enough to reduce weakly oxidizable metals like copper, tin, lead,
So it is just strong enough for electronics use, but not for soldering to stainless
steel or iron or anything with chrome or aluminum.
And rosin-flux goes back to its plastic-like solid form after use, so it does not act
very corrosive to the metals later on.
So we do not need to clean it away carefully.
It can be cleaned away if you want to work at it, with brush-scrubbing and the right
"polar solvents".
"Flux remover" is sold in spray-cans for this. Rubbing alcohol with a dash of dish-soap
sort of works for me.
Try it and see what it looks like.

 Soldering Wick
A solder wick (also desoldering wick or desoldering braid) is a tool for removing solder from any solder joint. Usually, it is a roll of fine, braided 18 to 42 AWG wire, typically oxygen free copper, which has been treated with a rosin solder flux.

Close up to a piece of solder wick

Close up to the netting of a solder wick

To remove solder with it, one presses the wick onto the solder joint to be removed and then heats the wick portion that is on the connection with the tip of a soldering iron. As the rosin melts onto the wick and the connection and the solder reaches its melting point the solder rushes via capillary action onto the clean copper braid. Once everything has melted and the solder fuses with the braided copper, the wick is lifted along with the solder and is then cut off and disposed of

n73 volume key ways

n73 volume key ways