n battery common problems of mobile cell phones and their repairs.

Common problems with mobile phones and their maintenance.There is no doubt that dust is a major problem for all electronic devices, and mobile phones are no exception.In most electronic devices, the warning supports this by "keeping it in a clean, dry and safe moisture-free place.
Due to the presence of dust and moisture, rust and corrosion of components lead to broken circuits and electrical wire road and bridge connections.This annoying thing is well known in cell phone repair engineers and other electrician repairs.Once the phone is removed, repair all components in the PCB from the rework station using hot air fire (welding) in case of loss of contact due to phone drop.
Troubleshoot continue to clean the pcb, including any other necessary components with methane-based spirits/volatile liquids.To dry, use the hot air from the hot air station.It should be noted that the decomposition must be carried out before it is completely brushed off.
In most cases, the above is everything you need to get your phone back to work.(!Power issue: the phone refuses to power on in this case.(1) check the battery voltage and ensure that it meets the manufacturer's specifications (usually 3 ).
7 V) (2) check and clean the battery connector on the PCB to make sure the connection is not damaged.(3) charge the mobile phone with a working charger.If it charges the phone but the phone is not powered on, the power switch may be responsible.
(4) check the power supply ic of the burns, fuses and other components related to the power supply on the PCB.(5) The problem may be software if all components are OK.(1) go to the settings menu and make sure the ringtone option is turned on.
Note that in some phones, when the headset is connected to the phone, it does not ring through the speaker until you remove the speaker.(2) enter the configuration file to ensure that the volume is turned off such as mute, flight or online mode is not activated.(3) adjust the volume control of the ringing.
(4) make sure that the call transfer is not activated as this will send your call to voice mail without ringing.If all of this is OK, use a multimeter to check if the ring rail is continuous.If you can also, replace the ringtone with a working ringtone.
Software updates may be required if this does not solve the problem.Flash the phone with the appropriate Flash file.Vibrator problem: (1) ensure that the vibrator is normal by connecting the vibrator to the end of the battery.
It vibrates if it can.
(2) Make sure to open the vibrator from the settings menu.(3) ensure that the vibrator is in contact with the PCB.(4) Check whether the vibrator track is open.
Ear problem: make sure the ear piece is in contact with the PCB.92) test the ear piece with a multimeter to ensure normal.Put the headset in the work phone to make sure it's good.
You can also replace the headset with a working headset to know what the problem is.With the help of the rework station, clean the PCB with methanol-based spirits/volatile liquids and brushes after welding all panel components.If all of this fails, it is suspected that it is a software problem.
Flash the phone with the appropriate Flash file.Oral film problem: (1) Test oral tablets to ensure that there is no problem.(2) ensure that the mouth parts are in contact with the panel.
(3) clean the panels and mouth parts to ensure no dust.(4) replace the mouth piece with the work piece.(5) Check the track of the mouth piece to ensure that there is no open circuit.
(6) check the audio track to heat/weld the audio ic.(7) If all of this fails, then the software issue may flash the phone with the appropriate flash file.Keyboard Issue: (1) make sure there is no security device.
You may need a code to unlock the key lock.(2) ensure the correct contact of the key with the PCB.(3) make sure the keyboard is not stuck.They should be able to move freely (bounce up and down ).
(4) in some flip or slide phones, side scroll keys or/and oral parts may need to be removed for them to work.If the mouth piece is responsible, change it.(5) Check the keyboard track to make sure there is no open circuit.
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The following posts will take a look at the remaining FAQs, a bird's eye view of copmmon software issues, how to solve them, and briefly deal with common problems experienced by mobile users, including suggested solutions.Before summing up, we intend to see how to fix the ata guide for cameras, radios and computers?Video, TV, gun?, Is now in the mobile phone built-in players, etc., to promote the market.N.B This article is divided into four posts.
You can read the full article in the blog above.This is the first post