The mobile phone Printed circuit board(PCB) have some small electronic components.
Most of these electronic components are SMD (Surface Mount Devices).that is they don’t have any leads like thru-hole (they are glued to the board).
the following are small component part of the mobile phone:
Mobile Phone Coil
Coil: It filters and decreases Current and Voltage.
It is found in any section of a mobile phone. It is found in many shapes and sizes.
Coils are found in different colors like:
(i) Black and white
(ii) Blue and white.
(iii) BIue and green color.
Surface Mount COil in Mobile Phone
Boost Coil or power inductor: Its function is to increase current. Its size is little bigger than simple coil and It has the binding of copper coil inside. It is found in black color.
the capacitor in mobile phone
Capacitor is used to store electric charge or current.
There are several types of capacitor out there, each with certain features and drawbacks which make it better for some applications than others
Mobile phones make use of three (3) Type of capacitor. They are:
1: Non-Electrolytic Capacitor or ceramic capacitor
2: Electrolytic capacitor or polarize capacitor
3: Network Capacitor.
Electrolytic Capacitor or polarize capacitor: It filters and stores electric current.
They are commonly used for power filtering on mobile phone and computer motherboard due to their small size and long term stability. it is found in any section of a mobile phone. Its size is larger than the non-electrolytic capacitor.
It is found in two (2) colors –
(i) Orange with a brown strip
(ii) Black with a white strip.
Note: The side with the strip is Positive (+) and the other side is Negative (-).
An electrolytic capacitor generally comes in two basic forms: Tantalum electrolytic capacitor and Aluminum electrolytic capacitor.
Non-Electrolytic Capacitor or Ceramic Capacitor: Its filters direct current (DC).
It is found in any section of a mobile Phone. Its height is little more than chip resistance.
It can be of gray, yellow or brown in color. It has no polarity i.e. no Positive (+) or Negative (-) side.
Network Capacitor: It is made from 2 or more Non-Electrolytic Capacitors.
Resistance or Resistor in Mobile phone:
It Reduces (limit) the flow of current.
There are two (2) types of resistance on the PCB of a Mobile phone:
- Chip Resistance: It reduces current and passes it forward. It is often in black color. In some sets, it is also found in blue and green color. It is the smallest electronic components on the PCB of a mobile phone. It can be found in any section of a mobile phone.
Network Resistance or Array Resistance: It can be found in any section of a mobile phone. It is made from two (2) or more Chip Resistance.
Coupler: it’s found in the Network Section of a mobile phone. It is of either black or white color and has 6 pins bent inside.
Function: It filters network.
Faults: If the coupler is faulty then there will be no network in the mobile phone.
The diode in mobile phone
Diode is an electrical component that allows the flow of current in one direction. It does not pass current in reverse direction.
Mobile phones make use of the following diode.
- Rectifier Diode: it is used for power supply operation, it can handle higher current flow than other diodes that is why it is used to converts Alternating(AC) Current into Direct(DC) Current.it is also used in battery chargers for removable batteries, computer power supply .It is found in black color.
Mobile Phone Rectifier Diode
- LED: it’s a two terminal device which converts electrical energy into light energy. its emits light. It is found in white or light yellow color
Mobile Phone LED
Zener Diode: It filters and minimize current and passes forward. It acts as the voltage regulator. It is found in chargings section of the Mobile phone. A zener diode has fixed capacity like 4V, 6V, 8V etc.
Mobile Phone Zener Diode
- Photo Diode: it is a two terminal device which convert light energy into electrical energy. It is used to detect both visible and invisible light rays like Infrared Rays, proximity sensor, remote control.
Transistor: Iti s use as electric switch, signal Amplifier(increase current and voltage signal) that is turning a low power signal into one of higher signal, digital logic. This electronic component is found in any section of a mobile phone. It is of black color and it has 3 legs.
Voltage Regulator or voltage Stabilizers: It filters current and regulates voltage. It is an Integrated Circuit(ic). This electronic component is found in any section of a mobile phone. It is of black color and has 5 or 6 or 8 legs.