Garmin-Asus Garminfone Hard Reset Procedures

Here's how to Reset the Garmin-Asus Garminfone  to Factory Default Settings       Please note: the following process will restore your device to the default state settings and erase all of the data and downloaded applications stored on your Garmin-Asus Garminfone. Please ensure that you back up all required data before you reset the device.     First, try this:    1. From the main home screen, tap menu    2. Select Settings    3. Press the menu key, then Select Master clear    4. Enter your password if prompted, then Select Yes to confirm If the device is frozen and the above procedure does'nt work, try the following method below.    1. Turn the power off. If your Garmin-Asus Garminfone is frozen, pull the battery out and reinsert it back          again    2. Hold the Left D-pad button    3. Press and hold the Power button until the...

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Dell Streak Hard Reset procedures

Here's how to Reset the Dell Streak  to Factory Default Settings        Note: The following steps will restore your device to the default state and erase all data and downloaded applications stored on it. Ensure that you back up all required data before you reset the device.     First, try this:    1. From the main home screen, tap menu    2. Select Settings, then Privacy    3. Select Factory data reset    4. Select Reset device    5. Select Erase everything If your device is frozen and the above doesn't work try this,    1. Press and hold the Power button  and then touch the Power off option on the screen to turn off the device.    2. Simultaneously press and hold the volume up button  and volume down  button.    3. Without releasing the volume buttons, press and hold the power button until the device displays the configuration screen.   ...

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Understanding WLAN and GPS Circuit on Smart Phones

Additional features such as Bluetooth, WLAN and GPS on Smart phones become more popular in the market. As a techie you also need to figure out how this circuit works in order for you to catch up a new evolving designed on mobile  phones. These additional features is packed into an IC component module in a circuit, and this kind of of circuit are associated with a master clock which typically a external clock crystal oscillator. With the master clock the data transmitted or received  is modulated to a proper certain frequency. Here's how simply tells us how the circuit works on smart phones. The WLAN circuit  Wireless Local Area Network (WLAN) links two or more devices using some wireless distribution method (typically spread-spectrum or OFDM  radio), and usually providing a connection through an access point to the wider internet. This gives users the mobility to move around within a local coverage area and still be connected to the network. A typical block diagram...

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Understanding about bluetooth circuit in mobile phones, a key to fix bluetooth problem issues

We already know that Bluetooth is an open wireless device technology standard for exchanging data over short distances from fixed and mobile devices(using short wavelength radio transmissions), creating personal area networks (PANs) with high levels of security.The Bluetooth baseband protocol is a combination of circuit and packet switching. Slots can be reserved for synchronous packets. Each packet is transmitted in a different hop frequency. A packet nominally covers a single slot, but can be extended to cover up to five slots. Bluetooth can support an asynchronous data channel, up to three simultaneous synchronous voice channels, or a channel, which simultaneously supports asynchronous data and synchronous voice. and that's how it simply  works. Since we are talking about mobile phones here, it is much more really great to know how really bluetooth circuit works on cell phones circuit? Isn't it nice to know, so that we can easily managed how to fix it since it is our main reason...

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Solving Camera Flash/Torch LED failure on Nokia 5800

A camera flash LED is high power super bright LED and it is driven by a high power compact Flash/Torch LED driver IC. This LED driver chip controls the LED current and improve flash brightness and picture quality in dimly lit environments. Flash LED failed due to overload, short and open circuits, wet damaged, accidentally dropped and any other means of related causes. Fixing the camera Flash LED failure is quite not too difficult on Nokia 5800 , its because the flash LED components were all mounted and located in an isolated part of the main PCB board. Hints for repair: * check the smd fuse and coils continuity. these is where the supply voltage feeds across from the cell       phone's battery. * Remove the Flash/Torch LED driver IC, trace each of terminals connection to a corresponding        component  parts. * Replace the Flash/Torch LED driver IC. Here's the datasheet of Camera Flash LED driver IC for a deeper knowledge...

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A guide to fix Nokia 5800, Camera Hardware failure

This repair guide shows the Nokia 5800 Xpressmusic main camera circuits components that may possibly damaged and result to camera hardware failure. Some of camera hardware problems such as, camera on standby mode, a blank or black display appears when the camera is open. This solution can be used for tracing the line paths and for easy locating the camera circuit components that is connected within the camera circuit. however; this repair guide can only be used if the main camera module already been check, test or already  installed a new replacement camera module but the problem still exists. Nokia 5800 xpressmusic camera repair solutionIn most common problems that may occurs in fixing camera problems is that the supply voltage is loss or being cut and result to such problem issues, this may happen if the unit is damaged by a liquid or water damaged. But not totally happens as always like that, it also comes from any basis, like interrupted firmware, the camera module contact...

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Nokia 5800 LCD Display Backlight LED's Failure - repair solution guide

Here's  the solution on how to repair Nokia 5800 Xpressmusic LCD backlights  failure that result to a dark, black screen display.This solution simply show the line paths of each particular components of where it is being connected in the main PCB board circuit. Nokia 5800 LCD Display Backlights LED's repair  The Nokia 5800 Xpressmusic used an LED driver IC same as other Nokia mobile phones, this IC chip drive and control the current and voltage to LCD backlight LED. Repair hints, refer to the picture above: 1. check and test the LCD backlight LED's, you can do it by setting the Multimeter to X1  just refer to the pictures above for the pin configuration.  The positive (cathode) and the negative(anode) is indicated on the LCD pin connector. If the backlight LED's wont light up, a new replacement LCD is necessary. 1. Check the coils for continuity and resistors resistance value, replace if found busted or damaged. A very low resistance resistor can be easily...

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Understanding how RF circuit Works on Cell Phones

In cell phone repair it is very helpful to understand how the RF circuits works , for this is a big help when troubleshooting No signal problem issues. RF stands for radio frequency , this frequency is used to  transmit and receive the data signals from a mobile phone. Here's a brief explanation on how does RF circuit works on mobile phones. This is for GSM RF circuit only, although the WCDMA circuit and WI-FI circuit have similarity on this but I will try to explain both of it hereafter. See the block diagram below. Observe how the frequency data signal feeds from a certain parts of an RF circuit design. A breakdown or failure of each certain part will result to signal loss and the capability to generate, amplify, control , process, send and receive the desired radio frequency during transmission process.  In mobile phones transmission there are two types of operation took place, the receiving operation and the transmitting operation. In normal mode, RX part is always...

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Nokia 5730 SIM card assembly connection - Test spots for troubleshooting

The SIM Card circuit of Nokia 5730 Xpressmusic, this guide can be used to troubleshoot and repair Insert SIM Card problem when occurs. The SIM card connection is rarely the same as of some any Nokia mobile phones handsets, The 5730 does not have a SIM filter IC unlike others do have. The SIM data, clock and reset signals is feeds directly from the PMIC (power ic) located at the right bottom of the main pcb board. Each signals used bypass capacitors to ground lines which is mounted behind the SIM card connector socket. The SIM supply voltage (VSIM) used a filter coil mounted located near at the SIM socket. You can trace each individual lines paths during hardware repair. You may start from checking the supply voltage first by checking the filter coil and the line paths across to it from the VSIM capacitor near to the PMIC (power ic). Check the Data, Clock and Reset line paths through to each capacitors. For further deeper troubleshooting check it here and learn how the SIM circuit...

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Solve Nokia 5730 Xpresmusic Restart Problem When Charging

If your Nokia 5730 xpressmusic often restart when charging or a charger is plug-in it always restart. Here's a simple solution  to fix the restart issue, all what you have to do is update your phone firmware to the latest versions.. Instructions to make the update 1) Download and Install "Nokia PC Suite" on your PC. 2) Download and Install "Nokia Software Updater" on your PC. 3) Back up phone memory on the 8GB SD Card. 4) Remove the 8GB SD Card from the phone. 5) Make sure that the phone is fully charged. 6) Connect the phone to computer via USB Cable. 7) Start "Nokia Software Updater". 8) Follow the steps. You can also used this method by using Nokia Ovi-Suite and then update it to version 200.12.87  or higher and latest firmware versions. For mobile technicians tips. Flash the Phone to latest and higher versions, this problem cause by a corrupted firmware. If the software update does not solve the issue, See here for which components needs to be check or replace. This problem occurs because the designed of  5730 Xpressmusic  is not the same to other nokia mobile phone models circuit designs. The power ON/OFF switch is being connected with an IC that is also...

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Nokia 5730 Xpressmusic LCD LED Backlight Failure Solution

Here's the repair guide solution to repair Nokia 5730 xpressmusic LCD LED backlight problem, a failure when the LED backlight failed to light up that result and turns the display into a dark, black or blank screen display. This solution may only work and can be applied if the LCD and flex cable is properly check, test or by way of replacing it already but the problem still exists. In Nokia 5730 the LCD LED backlight is driven and controlled by an SMD LED driver IC, this chip is located or mounted just located near at the bottom left of the main PCB board. The chips Power supply voltage which feeds directly from the cell phone's battery (VBAT) which is approximately 3.7 volts DC. This voltage is being filtered by a large Filter coil, You may check the filter coil first, then trace the line paths on it. You may also then remove the LED driver IC and trace all corresponding lines from the chips ball bumps through to the flex cable pin connector, which is in pin number 47 and pin number...

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Samsung Moment SPH-M900 Hard Reset - procedure

 Samsung Moment SPH-M900 Hard Reset, restore to factory default settings procedures. Note: Please make sure to do a back up of your data stored on your Samsung Moment, this process will delete all data stored on your device. To Restore to factory settings    1. From the application menu, Select Settings    2. select SD Card & Phone Storage    3. Select Factory data reset    4. Select Reset phone    5. Enter your password if required, then Select Yes to confirm To do Hard reset  if your phone is frozen:    1. Turn the power off. If your Samsung Moment is frozen, pull the battery out and put it back again    2. Hold the Volume Down button, Call and End until "Samsung" appears on the screen along with a menu    3. Select Master reset device    4. When the phone is done erasing, choose the option to reboot Once the Samsung Moment reboot it returns back to factory-fresh default state...

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Nokia 5730 Xpressmusic keypad LED backlight problem - repair solution

This repair solution can be used  to solve Keypad LED backlights problem on Nokia 5730 xpressmusic. In Nokia 5730 there are two LED driver IC that controls the voltage and current to the keypads LED backlight. The first LED driver on the left side controls and managed the four LED's on the keypads while the other one the right side holds and control only two LED's. The repair solution picture above may help to easily determine which LED driver IC seems to be damaged by identifying which LED driver holds and control that particular LED backlight that does not light up. Check the LED backlight first before doing anything further. If the four LED's on left is not working, you may check or replace the left side LED driver IC, same also when the two LED's on the right stop working you may check also the LED driver IC on the right side. Just analyze and observe carefully how the LED backlight driver IC works. Check the connection of the LED driver IC's ball terminals, including which...

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Nokia 5730 Xpressmusic Earpiece Speaker - No Audio Sound Solution

Here's the solution that can be used to solve the earpiece speaker problem on Nokia 5730 Xpressmusic . As the earpiece speaker assembly is mounted and connected on a flex cable ribbon, so in this kind of design, the audio signal may loss if the flex cable is being damaged or cut and this will result to no audio sound can be heard over the earpiece speaker.  On the picture repair guide below you can trace the earpiece speaker line paths across the flex cable before trying to replace it with a new one; but make sure to test and check the earpiece speaker first before doing anything further. Now, if the speaker and the flex cable seems both working fine, you may then proceed to check the line filter coils as indicated on the picture guide. Click the images to view and download the large one Replace it with similar value, you may find it on other non working PCB board of other  Nokia mobile phone old model. Check the line paths across the pin connector to the filter coil, apply...

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solutions to solve blackberry series hardware problems - repair manuals

Download solutions for Blackberry series hardware problems; this solutions were tried and tested to solve of some blackberry known hardware problem issues. These repair guides are covered the following Blackberry Mobile Handset devices: 7100 series, Curve 8310, Curve 8320, Curve 8700, Curve 8900, Bold 9000, Bold 9700, name of the archive download All Blackberry  Curve 8310, Black Curve 8320  repair solution for the following problems -Keypads malfunction, microphone failure, Scroll keys malfunction, Insert Sim card problem,  Camera hardware Failure, Not charging problem, No ringtone/ buzzer problem download Blackberry 8700 Dead set / shorted repair solution download Blackberry Curve 8900 No network signal problem repair solution download Blackberry Curve 8900  ringer / buzzer solution...

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Nokia 5310 XpressMusic Display Problem (NO Display) Repair Solution

Here's how to repair Nokia 5310 XpressMusic Display problems. This solution may help to fix the follwing Display problem related issues on Nokia 5730 like, Garbled display Saturated display Distorted display White screen display (white screen of death -WSOD) Blue screen display Blank or black screen (No display) Troubleshooting this kind of problem seems to be easy, you can start by checking first the LCD pin connector if it is free from dust, dirt or corrosion. A corroded pin connector also interrupts the display data signal that is being feed to the LCD screen display. Then check all resistors just located right top of the PCB board layout. These resistors valued  33 Ohms each of it. If found busted or damaged you can temporarily short the resistor's terminal by applying a little bit solder on it, before replacing a new one, in this manner you can easily identify if the line path of that particular resistor is okay, then assemble back the LCD and power on the handset,...

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Nokia 5730 XpressMusic LCD display problem - hardware repair solutions

This solution works on Nokia 5730 XpressMusic display  problems like garbled, white screen, blue screen that is related to hardware failures. This solution may only apply if the flash firmware is already been done and seems to be okay and the flex cable assembly has been completely check or  replace but the problem still exists. In Nokia 5730 XpressMusic the LCD display data signal used two EMI-filter IC and a display data controller IC which is feeds from the application processor (CPU IC). see the repair guide picture layout. One of the EMI filter marked with number two is also used for the keypad interface filtering designed. This IC shared the three input and output lines for the display data signal filtering. You can check this tiny chips using the guide below before replacing them with a new one; the first one is approximately range 0 -100 ohms  resistance value and the second one is up to 70 ohms per each input and output lines. If both display EMI- filter IC already...

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