Moblile Phone Spare Parts and about its works

Mobile Phone Spare Parts and its works.

When you are going to be a clever technician of mobile phone repair firstly you want to know about mobile phone parts. When you are disassemble your mobile phone you can see lot of parts. If you don't know what are they and how its woriks on mobile phone Definitely you will be unable to identify faults in phone and some times when you assemble your mobile phone it will be dead.So try to understanding about Mobile phone spare parts and about its works. This lesson help you to be a clever technician.

Following are the most common Mobile Phone spare parts.

• Mobile phone Housing (Back cover and Front Cover)
This is a external parts which you have touch when you were taking a mobile phone in your hand.This is not doing special work but it is a necessary for internal appearance. You can buy these are in various colors and patterns. When you are replace your mobile phone housing try to take a original housing for it. Because these are made by special plastic which reduce creating ESD. Notonly that yes you can buy housing very cheaply but remember this oneday your phone will be dead or damage suddenly Because of ESD.



•  Mobile phone Housing (Middle Housing)

This is a very important part in Mobile phone. Because mobile phone PCB have been fixed to the this part and it is made by Special Plastic which is preventing create ESD.If you not change this part it is good for your mobile phone.




• Battery (Li-Ion, Li-Polymer, NiCd or NiMH)

A Battery is the main source which power supply to the Mobile phone Circuits and other parts.we can see four kind of standard Rechargeable Battery, those are Li-Ion , Li-Polymer, NiCd, NiMH). But NiCd and NiMH are used for old mobile phone.Because of that we can rarely find like that battery.However nowadays all mobile phones have Li-ion or Li-Polymer Batteries. When you want to buy a Battery always try to get a Original one.If your mobile phone power on you want to give 3.7V.Therefore standard Battery voltage range is 3.7V- 4.8V and are made of Li-Ion or Li-Polymer.

• Battery Connector.

When you connect the Battery and supply the voltage to the mobile phone ,Battery connectors will be the interface for connecting mobilel phone PCB( Printed Circuit Board) and Battery.Old phones used 4pin Connectors( +, _ , BSI, BT). But latest design consists of three pins , The + , - , BSI. ( please check the Battery and Memory Effect for the more details about +, -, BSI).If you not fix Battery Connectors Correctly your phone will not be power on.

• Keypad Membrane ( Domesheet )

When you Click the keymat(keypad mattress) of your mobile phone, automatically Domesheet (keypad Membrane) will be touch with keypad circuit  on PCB.

This Domesheets are made of tiny metals that act as a switch in a row of numbers and letters on  kepad mat.

Sometimes these metal rounds can be damaged ( oxidation or broken ) because of that phone keypad will not be work properly or it will be work as a uncontrolled circuit. When you replace a new Domesheet you must get a suitable one for your phone Model.

• Liquid Crystal Display ( LCD )

When we do any operation of a mobile phone we want to know it has been done or not. LCD is the component it vizuallize the operation of the mobile phone handset.

It is made of glass with tiny crystal fixel that imitate the light source that has programmed to display certain information such as text and images.
LCD also comes from wide range of specifications older LCD are called monochrome which only display one certain color. The later designs where multicolored and displays rich text and images.

The higher the fixel amount on a certain LCD the higher the picture resolution of images can displays.When damage this part of mobile phone you will be unable to identify about your operation (is it have worked or not) of the mobile phone

• Touch Screen ( Touch Screen Panels)

Touch Screens are common device in new smart phones and other normal phones. It can detect the presence and location of a touch within the display area.

These are made of flat thin glass which is designed with high capacitance value. When it is damaged you will be unable to do any thing if it is full touch  phone otherwise some function will not be operate( it is depend on phone model).

• Sysytem Connectors

system connector is a plug in in connector which interfaces used in charging by charger plugging or input software or sometimes used as a headset by plugging USB data cable or handset.If it is damaged you will be unabel to connect your phone with USB.

• Flex Cables

These are used as an interface to connect two circutis. Every slide and flap phone have flex cables notonly that butalso normal phones habve this cables.This cables are flexible so we can use this cables for connecting circuit with any other angle circuits.Because of damage this cable Circuits( combined with flex) will not be work properly.

• Camera Modulers

This component is used to capture or video and store image or video. If your mobile phone is a 3G one then you will be make a video call using your secondary camera or maincamera. Nowadays you can see this phone camera with 12MP sometimes these are greater than normal Digital Camera.When it is damaged you will be unable to capture and video.

• Mouthpiece (Microphone)


This is used to imitates and intercepts human voice to sends to others (Receiver). When this is damaged you can make a call but receiver will be unable to listen your voice. Microphone has polarity.when you replace new mic for your phone you must think about this polarity. other wise it is not worked.



• Earpiece

This is a small speaker which used to hear when make a call.when it is damaged you will be unable to hear otherone(caller) voice. Easily you can replace this part and we can see polarity and non-polarity earpieces in mobile phones.

• Ringer and Buzzer

This is also a speaker but it can generate high audible sound. Specially when we listen a ringtone, Mp3 that sound is generated by this speaker.So when it is damaged you will be unable to listen ringtone , Mp3 notonly that butalso unable to active your loudspeaker option in your phone.

• SIM connectors

This is used to hold and connect the SIM card with PCB. If it is damaged SIM card will be not connect with PCB. Then your phone Cant Identify your sim card and then definitely you can see like this message in your mobile phone LCD " Insert Sim".

• Switches

These switches are us as Volume Controller , camera switch ,on/off switch. However these are made by tiny metal conducts connectivity.Because of damage this switches sometimes phone will be dead or somefunction which are controlled by switch will not be worked.

• Vibrate Motor

It is a tiny motor and when it rotates, it creates vibration. However if it is damaged your phone will not be vibrate.

• TrackBall or Joystick

This is used t navigate certain features on the mobile phone and commonly navigate UP ,Down , Left. Right and Menu keys.When this is damaged you will be unable to navigate that keys but sometimes you can navigate that keys using keyboard also.

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When You disassemble your phone you will be identify that all parts sometimes this note will be helpful for understanding its parts and about works. step by step try to understanding all things about mobile phone repairing and Be a clever Technician. .