ALL MOBILE CPU & MOBILE IC  

      Counting Legs or Pins of IC

Any mobile phone PCB has several IC or integrated circuit. These are SMD or Surface Mount Electronic Components. Before understanding how to count legs or pins of any IC let us learn IC. What is an IC?

Any mobile phone PCB has several IC or Integrated Circuit. These are SMD or Surface Mount Electronic Components. Before understanding how to count legs or pins of any IC, let us learn about IC.

An IC is an electronic component made up of combination or integration of several other electronic components like resistor, capacitor, coil, diode, transistor etc.

How Many Types of IC are There?

There are mainly 2 types of ICs:

1. Leg-Type IC: This type of IC has legs or pins. These types of ICs are again divided into different categories but we will not discuss it here because it has nothing to do with mobile repairing.

1. Ball-Type IC: This type of IC has BGA (Ball Grid Array) underneath the IC. These types of ICs are again divided into different categories but we will not discuss it here because it has nothing to do with mobile repairing.

   

How to Count Legs or Pins of Leg-Type IC?

         Counting of leg-type IC starts in Numerical Digit in 

Anticlockwise Direction starting from

        the Nose Point or Cut Point. Have a look at the photo below to understand it clearly.

How to Count Balls of Ball-Type IC?

Counting of Ball-type IC is done in Both Clockwise and Anti-Clockwise Direction. Rows are counted in Digit Numbers (1, 2, 3, 4…) in Clockwise Direction. Columns are counted in Alphabet (A, B, C, D…) in Anti-Clockwise Direction.

NOTE: When counting Columns, “I” and “O” are omitted because they look like “1” and “0”.

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mic kitne types k hote hai

TYPES OF MICS

 DOSTO MICS  DO TYPES K HOTE HAI ANALOG AUR DIGITAL

1. ANALOG. 

ME 2 TYPES HOTE HAI UNIVERSAL AUR CRISTAL,

AUR

 2. DIGITAL MIC. 

Types of mic and its supply.dosto mic ko kis tarah se check karna hai isper mera youtube per video hai ap dekhle full detail information hai niche link per click kare video dekhne k liye,

 plz like share comment and subscribe my youtube channel thank you. 

https://youtu.be/5fRw1NoHKgw

watch detail information about mics. 

DOSTO IS ME MAINE APKO MIC KI SUPPLY KIS TARAH KI HOTI HAI BATAYA HAI.

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SIM FAULT IN ANY MOBILE

SMART TELECOM1 

                            APKA APNA CHANNEL

   MOBILE CELL PHONE 

       SIM NOT WORKING         PROBLEM AND SOLUTION 

HOW TO SOLVE SIM FAULT IN ANY MOBILE CELL PHONE

Types of Faults or Problems with SIM in any Mobile Cell Phone

• SIM is inserted but still there is a message saying “Insert SIM”.
• The Mobile Phone goes OFFLINE when the SIM Card is inserted.
• SIM works for sometime and then it stops working.
• There is a message that says “Invalid SIM”.

Mobile Cell Phone SIM Not Working Problem and Solution – How to Solve SIM Card Fault in any MobileCell Phone

1. Check settings and see if the mobile phone is in Flight Mode or Not. If it is in “Flight Mode” then change the Mode to Normal.
2. Clean SIM Card Tips and SIM Connector.
3. If the problem is not solved then change the SIM Card and Check.
4. If the problem still persists then Change the SIM Connector.
5. If you still do not find solution to the problem then Check Track of the SIM Section. Refer to the Diagram of the Particular Model of the Mobile Phone. Books with Diagrams of Tracks are available in the Market and on the Internet.
6. If the problem is still not solved then Heat or Change the SIM IC.
7. Finally, Heat, Reball or Change the Power IC.

Note:

• Check if the IMEI Number of the Mobile Phone is Good or Corrupt. To check the IMEI Number, Dial *#06#. If the IMEI Number is something like – 35826********220 OR *************??? OR************000? OR ***************? Then the IMEI Number is Corrupt. Reload the IMEI Number to solve the SIM Problem.
• Check BSI Point of the Battery. The Middle Pin is The BSI.
• . Change the Battery and Check. If the Display shows “Not Charging” and at the same time there is SIM Card Problem then it is caused because of BSI Problem of the Battery or the BSI Track of the PCB.
• If you need to change the SIM IC and SIM IC is not available then you can do jumper. The function of the SIM IC is just to complete the circuit.

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What is SMD Coil?

     What is SMD Coil and How is it Made?

SMD Chip Coil is made by twisting any conductor wire on a bad conductor base. The base on which the coil is formed is called core. When these coils do not have any base, they are called air core coil. Coil is also known as inductor. A coil always resists any variation in flow of current. If any variable supply is given to any coil, the voltage of opposite polarity is generated in the coil. This property of a coil is known as inductance. Hence, a coil is also called inductor.

           Types of SMD Coil or Inductor

There are many types of coil but surface mount coils are mostly used in mobile phones. These are tiny chip inductors directly soldered on the PCB track on the mobile cell phone. This type of inductor is called general purpose inductor. This is used for sharp frequency response for high quality factor. These inductors are made by spiraling wire on ferrite core with magnetic shield and surface mounting terminals are created on both ends after mounting it in a small hard package. These terminals are nickel coated for easy and better soldering on PCB Track. Nickel coating ensures reliable soldering.

What is the Graphical Symbol of Coil?

The Graphical Symbol of Coil is:

Add caption

Coil Symbol

Which character or alphabet indicates a Coil?

Coil is indicated by the alphabet L

What is the Work of a Coil?

The main function of a Coil is to STOP AC and PASS DC.

What is the Unit of Coil?

The Unit of Coil is Henry.

Effect of DC on Coil

A Coil passes DC Current like an ordinary wire. Magnetic properties are generated in the coil on getting DC. The power in the coil attracts iron particles.

Effect of AC on Coil

When AC current or Alternate Current or Variable Electric Current is given to a coil, a variable magnetic electric field is generated in the coil. AC voltage in opposite directions is generated due to this variable magnetic field which resists the AC volt.

How to Check Coil?

Place the selector knob of the Multimeter on Diode Sign. Now place the probes on both the terminals of the coil. If a beep sound is produced and the display reads close to 000, it means that the coil is OK. If the display shows 1, it means the coil is open or faulty.

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CAPACITOR KISE KEHTE HAI

What is SMD Capacitor and How is it Made?

SMD Capacitor or Surface Mount Chip Capacitor is an electronic component made up of an insulator between two conductors. This dielectric matter or insulator plays an important role of storing electric charge.

What is the work of SMD Capacitor?

The main function of any SMD capacitor is to store the electrical energy and re-supply i.e. charge and discharge electrical energy.

How is SMD Capacitor Made?

SMD capacitor is made up of metallic plates (good conductor of electricity). Both plates are separated using a bad conductor or dielectric.  The name of a capacitor is dependent on the dielectric matter used in the capacitor. If the electrolytic capacitor is yellow then its border are brown. If the capacitor is black then its border is silver.

SMD Capacitor

What is the Graphical Symbol of Capacitor?

The Graphical Symbol of Capacitor is:

Capacitor Symbol

Which character or alphabet indicates a capacitor?

Capacitor is indicated by the alphabet C

What is the Function of a Capacitor?

The main function of a capacitor is to pass AC and stop DC.

What is the Unit of Capacitor?

The Unit of Capacitor is fared.

Ceramic SMD Capacitor

It is a type of capacitor in which ceramic is used as dielectric matter. These capacitors are rated according to the ceramic electrical properties. The electrical property of ceramic is multi dimensional.

Use of ceramic significantly reduces the size of SMD capacitor compared to other types of capacitors. Various ceramic dioxides are used in ceramic capacitors like barium titenate, barium strontium and titanium dioxide etc. Desired temperature coefficient is obtained by using various ceramic dielectric products. Di insulation is prepared by using multi layers of dielectric matters between two good conductors. This reduces the chance of its getting out or order. Its electrodes are generally plated with silver. This provides a high quality soldering property to the capacitor.

How to Check Electrolytic Capacitor?

If the value of the capacitor to be checked is 10 mF, then select 20 mF on the Multimeter. Connect the lead to the CX socket and place the probes on both sides of the soldering tips of the capacitor. If the display of the screen shows 10 then it means the capacitor is OK. If the screen shows 000 then it means the capacitor is open. If the screed displays 1 then the capacitor is short. The capacitor is considered OK if the value is within its tolerance level.

Please note that the above process is not applicable if the value of the capacitor to be checked is more than 20 mF. Knob of the selector switch should be selected according to the value of the capacitor.

How to Check Electrolytic Capacitor of Value higher than 20 mF?

Turn the selector know of the Multimeter on the symbol of Diode. Insert the probes turn by turn on Com and V / W / F Pins and keep checking the capacitor. If the reading increases and settles at 1 then it means the capacitor is OK. If the reading in both the cases remains 1 or the reading stops while ascending, it means the capacitor is out of order.

How to Check Simple Capacitor Using Multimeter?

If the reading on the Multimeter shows 000 after testing accompanied with a beep sound, it means the capacitor is short. If the reading shows 1, it means the capacitor might be open or even OK.

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