Basic Electronics for CELLPHONE PCB Component

Subject: Basic Electronics for CELLPHONE PCB Component Wed Jul 08, 2009 11:00 pm

Cellphone PCB Component:

1. Resistor - used to limit the flow of current. It has no polarity and is checked
by continuity testing (analog or digital type tester).
(color; black and shiny, blue or violet)

2. Inductor - used together with capacitors as current filters. It has no polarity and is checked by continuity testing (analog or digital type tester).
(color; gray or black but not shiny)

3. Fuse - used to protect the unit from overload. It has no polarity and is checked
by continuity testing (analog or digital type tester).
(color; black or white with "K")

4. Diode - acts as rectifier. It has polarity and is checked by one-sided continuity testing.
(color; black with stripe at one end)

5. Capacitor - used as voltage filters and can store small amount of electricity. It has polarity and is checked by one-sided continuity testing.
(color; yellow or black with clear markings at the back with stripe on one
side for polarized capacitors and
brown for non-polarized capacitors)

6. Transistor - used to amplify voltages.
(color; black, it has 3, 5, or 6 pins)

7. Light Emitting Diode (LED)- used to illuminate the LCD and keypads. Commonly known as Backlights. Lights on when checking continuity.

8. Speaker - converts electrical signals into audible sound. Has cracking sound when testing continuity.

9. Microphone - converts audible sound into electrical signals. Checked using one-sided continuity test.

10. Switch - connects two separate lines. Has continuity when pressed.

11. Integrated Circuit (IC) - performs multi-task function.

Types of IC Packaging;

a. Pin type - uses legs made of pins and can be Single In-Line Package
(SIP) or Dual In-Line Package(DIP)

b. BGA (Ball Grid Array) - uses legs made of solder ball.

Moderator Posts: 23 Join date: 2009-06-08

wow salamat dodong ariel..kakugihan gyud akong palangga ba:D

Posts: 2 Join date: 2011-04-12

bos patulong s keypad ng 1200 no punktion ang DOWN UP OK and number 8