2011 ~ Repair Mobile Phone

Fault description:

Nokia X6 mobile some time got very strange problem that when we on camera then mobile just hangs and camera also don’t work. So we can’t capture image and record video and mobile also hangs when we open camera. When we open camera it will shows camera failure or hardware failure restart camera message. This problem appears due to sometime software reason or some time hardware problem. So here we consider both methods one by one.

Fault solution:

For this problem solution we have to use following methods:

1. First we apply software methods and we should flash mobile with latest version.

2. Open camera and press option an open camera setting then press restores camera setting then mobile camera setting will restore to its factory condition then check camera.

3. If no luck then open mobile and first we should change camera switch and check for solution because sometime camera switch got internal shorting and due to that we got this error.

4. After changing switch if no solution yet then we have to use jumper setting as described below.

5. According to image we have to remove three camera transistor and IC as N1402, N1403, and N1404 carefully.

6. We have to remove these ICs because these ICs got internal problem in their circuit so due to that we got this type of error.

7. After removing all those we should first jumper from a point on PCB to resistance as shown with blue mark line in above image.

8. Secondly connect two other resistance with red line as shown in image

9. Last connect a jumper between two more resistances as shown in image with blue color mark line.

10. After successful applying these entire jumpers now check camera and mobile for problem our problem will solve definitely.

Conclusion:

During all these IC removing process we should properly remove ic because in any nearer component are shorted then we will get more problem so be careful.

Nokia X6 handsfree problem

5:04 AM

Monika Mishra

Fault description:

Nokia X6 sometime have handsfree problem. So we can’t use earphone and sometime mobile shows handsfree logo on screen permanently. We got this error due to some setting mismatch and sometime due to hardware problems.

Fault solution:

For solving this problem we have to first check setting for quick solution. So apply these steps:
1.      Go to setting and select profile management there selects normal profile and check result
2.      Then got to setting of enhancement in enhancement mode select headset mode.
3.      Now first open mobile and change handsfree jack and check problem
4.      If problem still remains after changing handsfree jack then we have to use jumper for sound IC.
5.      First remove sound ic Z2010 as shown in image below carefully

6.       After removing IC we have to make jumper on all IC point as shown in image with blue mark.
7.       Middle point should be blank with no connection.
8.       After applying these jumpers we will solve our problem defiantly.

Conclusion:

During IC removing process heat and air setting in heat gun should be in proper setting otherwise IC’s internal print will be damage.

Nokia N8 camera problem

5:00 AM

Monika Mishra

Fault description:

Nokia n8 is latest mobile but some time mobile camera starts stop working. So we can’t capture image and record video. When we open camera it will shows camera failure or hardware failure restart camera message. This problem appears due to sometime software reason or some time hardware problem. So here we consider both methods one by one.

Fault solution:

For this problem solution we have to use following methods:

1. First we apply software methods

2. Open camera and press option an open camera setting then press restores camera setting then mobile camera setting will restore to its factory condition then check camera.

3. If no luck then open mobile and first we should change camera switch and check for solution.

4. After changing camera switch check line from all camera point to camera resistance as following image:

5. First connect point 1 and 2 as shown in image and then apply jumper from first point to camera resistance as shown with blue mark.

6. Then connect point 3 and 4 together and apply jumper from point 3 to other resistance as shown in image with red mark.

7. Finally connect point 5 and 6 and make them ground as shown with black mark in image.

8. After these entire three jumpers camera will work defiantly.

Conclusion:

First we should check all basic settings because if we apply jumper first without setting testing then this may result in wrong output.

Nokia C1 display light problem

4:46 AM

Monika Mishra

Fault description:

Nokia model C1 sometime had a strange problem that we can’t see display back light on LCD. This problem occurs due to problem in LCD or sometime in LCD IC and track missing from display transistor to LCD connector.

Fault solution:

For quick solution of this problem we have to use following methods:

1. First try to restore mobile factory setting using code *#7780# then mobile will

Restore in its factory value because sometime due to some setting mismatch we got this error.

2. Secondly we have to use hardware methods so use next step.

3. Open mobile and apply new lcd to mobile and check for solution

4. If no solution then we have to use jumper from lcd track first to a point on back side of pcb because that first connector receive current from that point and due to some internal crack in track print line miss there so apply following jumper there.

This is LCD connector side

And this is PCB back side

These methods will solve our problem and we will get our solution.

Conclusion:

During jumper setting process we should take care that jumper wire should not touch any component or not grounded.

BlackBerry 9300 display problem

4:44 AM

Monika Mishra

Fault description:

Blackberry 9300 sometime had a strange problem that we can’t see display light on LCD. This problem occurs due to problem in LCD or sometime in LCD IC and track missing from display transistor to LCD connector.

Fault solution:

For this problem we have to use hardware methods for quick solution. So apply these steps one by one:

1. First change new lcd an then check light

2. If no solution then we have to use hardware technique as step 3

3. Open mobile PCB and check line continuity from LCD connector second point to display transistor IC as shown with yellow line in image below. If line missing there then apply jumper shown below:

4. After this check line from first point of LCD connector to resistance as shown in image with red line and if line missing there then apply jumper as shown in image in red line.

After applying both jumpers we will see proper display light on LCD without any problem.

Conclusion:

During new LCD change process we should use new and original LCD because local LCD can cause bad result in light.

BlackBerry bold 9000 volume key problem

4:41 AM

Monika Mishra

3 comments

Fault description:

Blackberry bold 9000 sometime had a strange problem that both side volume key don’t work. So due to this we can’t increase or decrease sound in music and during call. This problem occurs due to problem in side switch or sometime in keypad resistance.

Fault solution:

For quick and proper solution for this error we have to follow all these steps carefully:

1. First we should change both side volume key and check for solution

2. After that check that weather appropriate voltage are appearing on volume key point. If voltage missing there then go to step 3

3. Now we have to check line continuity from volume key point to some resistance point as shown in image below:

4. First we should test that first point of volume key should be grounded as shown with black mark

5. Then check second point continuity to key resistance as shown with sky blue mark in above image

6. Check third point line continuity to a metal type point as shown with green mark

7. Finally check last and fourth point line track to other resistance as shown in image with red line.

So if during any of these line track testing we found line missing then apply jumper there carefully our problem will solved.

Conclusion:

During these jumpers setting we should care that all jumper should be placed separately and they should not have any connection or touching otherwise we will get internally shorting in circuit board.

Samsung S5230 charging indication doesn't show

7:01 AM

Monika Mishra

Fault description:

Samsung S5230 mobile some time shows not charging indication on screen every time. Due to this we can’t charge mobile and battery just drains after few hours. This problem mainly occurs due to shorting in charging filter.

Fault solution:

For quick solution of this problem we have to use following solution:-

1. In some cases due to batteries internally circuitry problem creates this situation that mobile shows auto charging so first we should change battery and check result.

2. After this try to change charging connector

3. After replacing new charging connector check track line continuity from charging pin 1,2 to desired point as shown in image below and from 19,20 to ground

4. If on any point line missing then apply jumper from pin’s point to pcb point as shown image below:

Conclusion:

Samsung s5230 mobile have 20 point charging connector so during jumpering process we should short point 1and 2, 19 and 20 for proper result.

BlackBerry Pearl 3G9100: troubleshooting charging and usb error

8:50 AM

Monika Mishra

Fault description:

BlackBerry mobile sometimes has a charging and usb connector problem. So we can't charge the mobile and also can't connect the usb to the PC due to this error. We had this problem due to a damaged charging connector or sometimes due to charging the IC.

Fault solution:

For a quick solution for this problem we have to follow all of these steps carefully:

1. First open the mobile and clean the charging connector. This process is very minor, but essential because the connector is very sensitive. It might not seem like a big thing, but the charging connector should always be clean. A few particles of dirt can make the difference between whether it serves its purpose or fails to work.

2. Then change the charging socket.

3. If the problem still remains then check all track continuity from the charging pin point to the appropriate transistor and on the IC point as shown in the image below.

4. According to the image first check the point 1 shown in green. The point should be ground.

5. Point 2 in the green mark should be blank with no connectivity.

6. Point 3 with the red point should be connected to charging IC leg number 2 using the red jumper line.

7. Point 4 with the sky blue mark should be connected to IC leg number 1 with the jumper and this point should be connected to the other charging transistor also shown in the image.

8. Last and final point 5 shown with the pink mark should connect to the other charging transistor below the charging pin.

After all of this is done, the jumper setting, mobile charging and making the usb connection the problem will definitely be solved.

Conclusion:

During the jumping process we should especially take care of all the nearest components of the circuit board and make sure that they do not become damaged. This is essential because any type of shorting in any component may cause another serious problem. The whole system relies upon the circuit board and if it goes down, then nothing is going to work.

The circuit board is a delicate thing; basically it is the heart of the mobile and any disruption whatsoever can throw it off. Also it is easy to break and difficult to repair. That is why you must be extremely careful when doing anything to it or near it. If something happens to the circuit board, you will have to purchase another mobile.

Motorola v9 mobile hardware flawed charger error

6:58 AM

Monika Mishra

Fault description:

Motorola v9 mobile some time shows fake charging or shows charger error or invalid battery

This problem seems to be a hardware fault. In such case mobile battery can’t be charge with charger.

Fault solution:

So for solving this problem we have to use following hardware tricks.

1. Try to change battery and charger

2. If no solution then open mobile pcb and use next step

3. Try to change charging pin connector as shown in image below

4. After that if problem still appears then remove a six leg charging IC as shown in image below.

5. After removing IC apply jumper from charging pin point to ICs all point as shown in image below.

6. Here we show charging point as blue mark numbering and ICs point as red mark so connect all those carefully.

Conclusion:

During new pin changing process we should properly connect app pin point to PCB point otherwise after all these process we will not get solution.

LG GS290 mic trouble can't make calls or record voice messages

2:32 AM

Monika Mishra

Fault description:

Due to some hardware reason LG GS290 mobile got mic trouble. This is a minor fault in LG mobile but due to this we can’t complete any call and also can’t record any voice message.

Fault solution:

For this mic solution we have to change mic from five point mic to ordinary two leg universal mic using 1k resistor and two jumpers.

1. First remove that default mic

2. Then pick universal mic and connect first point to default mic’s first point as shown with black line in image below.

3. Then connect second point of universal mic to fifth and last point of default mic with red line as shown in above image.

4. Finally connect a 1k transistor as shown with red color between 3rd and 5^th point of default mic.

Conclusion:

During these mic altering process we should use good quality universal mic because local mic may result in low voice or distribution in voice during call .

LGkp500 mic trouble no voice

8:30 AM

Monika Mishra

Fault description:

In lg mobile sometime mic starts not responding during call so at callers end no voice generates. Due to this we can’t record voice in voice recorder and can’t make any call properly.

Fault solution:

For this mic solution we have to follow all these procedure step by step:

1. First we should change new mic and then check for voice sound.

2. Then clean both mic connectors positive and negative for proper voltage.

3. If proper voltage appearing on point then use following jumpering solution as shown in image:

4. During mic jumpering process we have to connect a 1k transistor between both positive and negative point

5. After that connect mic with those point and that 1k transistor

Now we will get our mic properly in working condition.

Conclusion:

As previously described we have to use only 1k resistor exactly because using different current resistor can cause other problem like shorting in mic line track.

BlackBerry bold 9700 problem can't access sim in mobile

8:34 AM

Monika Mishra

2 comments

Fault description:

Blackberry bold 9700 sometimes shows insert sim card message while sim has been inserted into the mobile. This problem occurs because there is some internal track missing from the sim tray to the sim IC and sometime due to a shorted sim IC. So we can't access the sim in the mobile.

Fault solution:

For a quick and proper solution for this error we have to follow all these steps carefully:

1. First we should change the sim card because sometimes the sim card has internal shorting in a circuit so we can't use it. This is a hidden defect and one you aren't going to detect until you see the insert sim card message on your screen when it shouldn't be.

2. After this open the mobile and clean the sim tray (connector) and then check if the problem still exists. Keeping the inside of the mobile clean and totally free from even the tiniest quantity of debris is a necessity if you expect to be able to use your mobile all of the time.

3. If you haven't managed to solve the problem yet, then we have to check all track continuity from sim tray to the appropriate sim IC connection point as shown in the image below. It's a good idea to try and save yourself this work by remembering to first clean the sim tray, but it isn't always an effective solution. If it doesn't work, then you have no other choice but to begin checking the track.

4. First check the first point shown with the pink mark track to the IC first point.

5. Secondly, check the line from the second point shown with a sky blue mark to IC sixth point.

6. Then check the line from the third point of the sim tray shown with a black mark to the ground.

7. Check the 4th track shown with a red mark to IC point 2 and also to the point jut below this point.

8. Check the 5th point shown with a green mark for the line with the IC third point and a point below this 5th point connection.

9. Finally connect the 6th sim tray point to point 2 and a point just below this point as shown with a sky blue mark. So if we found any line missing on any point then we would have to apply the jumper as shown in image:

After all of this is done check on the problem again. If the problem still remains then we have to change the sim IC.

Conclusion:

We should check the continuity of all the sim tray point lines according to the color mark we had mentioned in the image above for a proper and quick solution. Sometimes it is necessary to go a step further in order to resolve this problem, but ultimately you will find that it is solvable.

BlackBerry bold 9000 speaker pops in handsfree problem

8:15 AM

Monika Mishra

Fault description:

BlackBerry bold 9000 sometimes has a handsfree problem. So we can't use the earphones and sometimes the mobile shows the handsfree logo on the screen permanently. We got this error due to some settings being mismatched and sometimes due to hardware problems.
Which brings us to another point to be made. If ever you can't figure out the reason for some type of disruption to service occurring, always check for hardware problems. It happens more often than you think. It could be something minor, or it could be something far more serious.

Fault solution:

For solving this problem we have to first check the setting for a quick solution. So apply these steps:

1. Go to the setting and select profile management there. Then select normal profile and with it in enhancement mode select the headset mode.

2. Now first open the mobile and change the handsfree jack and check problem.

3. If the problem still remains after changing the handsfree jack, then we have to use the jumper for a sound IC.

4. First connect point 1 to the sound transistor as shown in the image below:

5. Then connect point 2 of the handsfree jack to the transistor as shown in the image.

6. Then connect the 3rd point to the other resistance as shown in the image:7. Now connect the 4th point to another resistance properly.

8. And after all that is done connect the final and last point for a blank connection.

9. Now check the problem and if there is still a problem then finally change the sound IC as shown in the image with the rectangle mark.

Conclusion:

While setting the jumpers use good quality wire because low quality wire may result in a bad sound quality. Also, poor quality wire will most likely break or fray somewhere down the line and have to be replaced. Another thing, be careful to make sure that the jumper connections are firmly made, because having them disconnect suddenly will cause an instant disruption of services. There's yet another reason to make certain that the wire you use is in good condition, because the connectors on the jumper could disconnect from the wire and that would not only cut off your service, but leave a live wire exposed which is dangerous as well.

IPhone 3g home button not working

10:23 AM

Monika Mishra

Fault description:

IPhone mobile have just one button on front side that is home button. Sometime home button doesn’t work in this case we can’t start menu or any program in iPhone. Even we can’t unlock iPhone because home button is main key for all programs.

Fault solution:

For solving this problem we have to carefully follow all these below described steps:

1. For quick solution of this problem we have to first clean flex connector from any dust or carbon

2. Than try to replace keypad filter as shown in yellow mark in image and check button

3. After all if still no solutions then finally connect three points together using applying jumper from flex connector point 1 to keypad filter and then from filter keypad point on pcb as shown in image below.

Conclusion:

During this point connection we should connect all points properly using special iron because bad soldering process my result in bad result.

IPhone mobile refuses sim card

3:17 AM

Monika Mishra

Fault description:

In IPhone sometime mobile refuse to accept sim card it shows no service message instead of network indication. In some case we get network error that automatically no service message appears and we can’t connect call this is due to sim card IC problem

Fault solution:

For this problem solution we have to first check that weather flight mode is set to off mode then try following methods:

1. First try to change sim card then check problem

2. Secondly change the sim card jack and check for solution

3. If no success then check track line continuity from one to one sim connector to exact sim card internally circuit point on pcb carefully .

4. Those sim card connector track are shown in image with different color and numbering below :

5. If we found any track missing here then apply jumper as shown in image carefully.

After all done mobile will accept sim card properly.

Conclusion:

During track line checking on points on pcb we should have full knowledge of internal sim circuit point because wrong jumper can destroy sim circuit completely.

IPhone 3g ringer not responding

6:14 AM

Monika Mishra

2 comments

Fault description:

In IPhone sometime ringer (buzzer) starts not responding so we can’t hear music and ringtone sound this problem mainly occurs due to damaged ringer but some time due to internally line missing on ringer track from ringer IC

Fault solution:

For this problem solution we have to first check that weather sound profile is set to normal mode then try following methods:

1. First try to do factory setting and check sound

2. Secondly change the ringer and check sound

3. If no sound then check that weather incoming voltage is appearing on ringer connecting point if voltage missing there then apply following tricks

4. First remove six leg ringer IC as shown in red mark in image below

5. After removing IC apply following jumper from IC point to two resistances as shown in image below with red and yellow lines.

After all done we will hear sound from ringer properly.

Conclusion:

During IC removing process special care should be taken because rest of ICs and other component are very closer to it.

IPhone 3gs batter drained shows full

6:08 AM

Monika Mishra

Fault description:

Apple iPhone 3gs sometime got battery problem it drains battery quickly within some hours while battery shows full indication in such case we have to use charger many times.

Fault solution:

For solving this problem we have to consider these steps carefully because iPhones hardware section is very difficult to handle. So follow these strep carefully:

1. First try to change data cable and charger then check battery backup

2. Then try to reset mobile using setting then check problem

3. If still no luck then use next hardware tricks

4. In mobile we have two charging capacitors those work is to control charging function some time they had internal shorting so due to that we get false charging so remove two charging capacitor as shown in yellow mark in image

5. Then apply jumper from that point to direct battery point then problem will solve.

6. After all done we will get proper charging and battery backup but there is one disadvantage of this jumper that we cannot see charging process during process.

Conclusion:

After applying this solution take care about charging time that we should not exceed more than 2 hour because over charging can damage battery.

Issue with BlackBerry 8320 charging

10:18 AM

Monika Mishra

Fault description:

In blackberry 8320 mobile charging problem occurs due to charge track missing from charger pin

To appropriate component. So we can’t charge mobile or we get charger trouble that battery shows charge indication but doesn’t store charge so it discharges immediately.

Fault solution:

For the solution to this problem, first we have to clean the charging connector from any dust or carbon. This might seem like an unnecessary chore, but it is important as even the slightest bit of debris can cause the the charger to stop working. This is a delicate component you are dealing with and it doesn't take much to interfere with its ability to operate. After this we have to check the charge condition and then apply the following tips for a complete solution:

1. Here we have a five pin charging connector in the BlackBerry mobile 8320, so first check all track continuity from those points to all resistance and ground points as shown in the image:

2. Check that the first pin point is connected to ground earth as shown in the red line.

3. Check that the second point is connected to the upper point of the charging transistor as shown in the blue line.

4. Check that the third point is connected to the vcc point on the PCB as shown in the green line.

5. Check that the fourth point is connected to the VBat point on the PCB as shown in the yellow track.

6. Finally check that the last point is connected to the positive on the PCB as shown in the pink line.

7. After checking all the points, if the voltage is missing on any point track, then apply the jumper as shown in the above image.

Conclusion:

While checking all the lines we should properly check all charging points carefully because wrong or bad soldering may damage the charge circuit. Soldering is more than just melting two points together. It has to be done a certain way so as not to interfere with the operation of the charger or even cause some serious harm to the charge circuit.

BlackBerry 8310 ringer not heard

3:16 AM

Monika Mishra

Fault description:

In the BlackBerry 8310 sometimes the ringer (buzzer) starts not responding, so we can't hear the music and ringtone sound. This problem mainly occurs due to a damaged ringer, but sometimes it is due to an internal line missing on the ringer track.

Fault solution:

For a quick solution of the BlackBerry 8310 buzzer problem we have to apply the following tips:1. First check that on the profile normal or loud has been activated because sometimes we activate the silent profile so no sound will come from the ringer.

2. After this try to replace the ringer with a new one and check the sound from the ringer.

3. If that is not the solution then check the line continuity on the ringer connector point on PCB.

4. If no current appears there on both points, then apply the following jumper from the ringer connector point to both resistances as shown in the red line 1 & 2 shown in the image below:

5. If you still have no luck then we have to rebel or change the main CPU IC because the sound IC is built into the CPU.

Conclusion:

Before applying the jumper we should first check if the track continuity is correct on the ringer point.

The solutions to this problem may seem like they are confusing, but in fact they aren't difficult at all. It's possible that the problem can be corrected the first time out without having to resort to any further measures.

Just be careful when using the jumper as always, to make sure that the connectors are clean and the wire is strong. That a swift and trouble free connection can be made without having to take much time about it at all. It may just work and save you any further problems.

1:14 AM

Monika Mishra

Fault Description:
The Blackberry 9700 mobile has a good camera flash but sometimes the camera flash doesn't work, so we have trouble during night photography or sometimes in low light conditions.
Fault description:

So to solve this problem follow all these steps:
A. First open the camera and check the camera setting and check in the camera setting that the camera flash is set to the on or automatic option.

B. Now check the camera flash. If that is not the solution then try the hardware solution.

C. First check whether the camera flash is properly connected to the PCB.

D. Now check the track line between two resistances and use the jumper setting from the resistance shown with the pink line as shown in the image below:

E. Now check the camera flash. If this is not the solution then change the camera flash IC shown within pink mark and then the camera flash will work properly.

Conclusion:

During the jumping process special care should be taken because the resistances are very close and an improper setting may damage other things. These machines may seem like they are sturdy, and in many ways they are. However, there are some areas inside that require a little extra care or a little extra caution when you are working too closely to those areas. It doesn't take much to cause a problem and it's foolish to risk doing so when a little extra care can prevent these troubles.

And always remember to treat the jumpers with respect and keep the connectors clean. When you are dealing with jumpers the connection they need to make can very easily be disrupted or prevented from occurring at all. It's that delicate. So it's essential that you make sure they are absolutely clean.

Blackberry storm 9700 start camera error

3:09 AM

Monika Mishra

2 comments

Fault description :

The BlackBerry storm 9700 mobile has a camera fault due to a hardware problem. But in some cases it cam be caused by some software error. When we start the camera then it shows the words camera error or the mobile just restart.

Fault solution:

For repairing camera we have to first check software because some time due to setting mismatch camera start to shows error so apply these tricks:

A. First open camera and select setting then press restore camera setting then mobile will shows restore all camera setting to its default then press yes . Now check camera if no solution then go to step b.

B. Open mobile and first clean camera connector then check

C. If still no luck then remove IC shown in red mark

D. Then apply jumper shown in blue mark to that IC point as shown in image below:

E. After all done if still camera doesn’t work then change the camera.

Conclusion:

During the camera problem we first have to check the software setting, because if the problem is in the setting and we apply the jumper then it will produce more problems.

If however, the problem is in the hardware, then it will probably be necessary to get another camera. It is extremely difficult to correct problems that are embedded in the hardware as opposed to software where it is usually possible to make corrections and solve a problem fairly easily.

The situation is not the fault of you the user in any way but exists because of the software or hardware defect, so keep that in mind if you have to have the camera replaced. It is the company's responsibility to do so after you have made every attempt to correct the difficulty yourself.

Mobile Memory Full problem in nokia e7

8:48 AM

Monika Mishra

Fault description:

Sometime due to improper use and some virus problem we have mobile memory full problem and when we try to open menu and other things then message appears “general memory full delete some items from phone memory” and when access memory detail it shows full memory in use while we have no any content in memory.

Fault solution :

There are mainly three major steps for this problem solution so follow these:

1. First we should check that there should no content in message inbox folder because when we receive any file through Bluetooth it stores in phone memory so delete all item from inbox.

2. Try to soft reset mobile for this go to setting-phone setting-advance setting-restore factory setting now mobile will show this message “you are about to restore all factory setting ” press yes then mobile will ask for security code then enter 12345 this is default code for nokia mobile if you have changed any code then apply those .

After this soft reset check mobile memory if problem not solve then apply third step.

3. Connect hwk box to computer and attach mobile to hwk and follow these instruction:-

A. Select BB5 from brand list

B. Now select nokia e7- rm-626 from model list

C. Select interface medium F-bus because some time usb doesn’t work

D. Now press format FS button it will format complete mobile phone memory and all user data so any unwanted things will completely deleted

After all think have been done then disconnect mobile from device and now check memory detail we will get there complete memory unused as should be in idle condition .

Conclusion :

Before format mobile memory we should backup all our important data like contacts, message, notes etc. Because after format mobile will be in its idle state as a new mobile.

BlackBerry Bold Touch 9900 hands free Doesn't Always Work

8:56 PM

Monika Mishra

Fault description:

The BlackBerry Bold Touch 9900 is the latest mobile phone with the touch and type feature. Sometimes the mobile's hands free starts creating a problem where it stops working sometime so that during a call we can't switch to hands free or loudspeaker mode.

Fault solution:

To quickly repair this problem we have to follow all these steps carefully. Here are the steps:

1. First clean the hands free jack (connector) with acetone and then check hands free.

2. Now check the mobile setting for handset profile. Go to the setting then profile and then select normal profile or handset profile. If the problem is not solved yet, then we should apply the hardware solution.

3. Open the mobile PCB and first change the hands free connector (jack) and check the problem.

4. If the problem is still there then apply the following jumper from 4 resistance near the hands free flex connector.

And one resistance above the flexes connector as shown in the image below:

Conclusion:

During the hands free jumping process take care about the nearer components that they should not be shorted, otherwise many new problems can appear.

This could really have devastating effects, because it could ultimately lead to the entire mobile having to be replaced. The system is complicated and delicate, so while it's okay to make mistakes, you should exercise caution and take precautions to avoid causing unnecessary difficulties.

You should also check to make certain that the jumper connectors are clean and connected securely to the jumper wire which should be in good shape and not something that is frayed or damaged in any way.

8:54 PM

Monika Mishra

Fault description:

Samsung C3303 mobile some time shows automatic charging indication on screen every time. Due to this we can’t charge mobile and battery just drains after few hours. This problem mainly occurs due to shorting in charging filter.

Fault solution:

For quick solution of this problem we have to use following solution:-

1. In some cases due to batteries internally circuitry problem creates this situation that mobile shows auto charging so first we should change battery and check result.

2. During charging process current flows from charging pin to charging connector and from connector it went to charging filter and finally from these charging filter current goes to charging IC and mobile get properly charging but in some cases because of improper frequency of voltage and current these charging filter got internally shorting and due to shorting mobile shows auto charging so for solve this problem we have to remove all three charging filter one by one .

3. So first remove one charging filter from heat gun carefully. These filters are shown in image below in red mark and after it if problem not solve then remove all remaining both filter.

After all three step procedure mobile will shows normal charging process when we need.

Conclusion:

During charging filter removing process take special care because extra or deep heat can damage internally mobile tracks so be careful.

Sony Ericsson c702 mic not working solution

8:21 PM

Monika Mishra

Fault description:

In sony ericsson c702 mobile some time mic does not work so there no voice to caller’s end.

This problem occurs due to physical problem like water damage or physical shock on mobile.

Fault solution:

For solving mic problem apply following solution step by step:

1. First change new mic then problem might be solved.

2. If still no solution then check track continuity from both mic point to mic resistance shown in image below

3. First check track continuity from resistance L3101 shown in blue mark to mic’s positive point if there some problem in track then apply jumper as shown in image using blue line.

4. Second check second track continuity from resistance L3100 shown in red mark to mic ‘s negative point if continuity missing there then apply jumper as shown with red line.

Now after all above tips and jumper setting mic will work properly without any problem.

Conclusion:

Jumper setting is last solution for mic problem. Because in Sony ericsson new generation mobile mic IC is inbuilt in CPU IC which is not changeable because it is shielded.

8:30 AM

Monika Mishra