cellpisces
Moderator
Posts : 23
Join date : 2009-06-20
Age : 38
Location : midsayap, cotabato philippines
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Subject: Basic Electronics for CELLPHONE PCB Component Wed Jul 08, 2009 6:00 pm |
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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.
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Yonon
Moderator
Posts : 23
Join date : 2009-06-08
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Subject: Re: Basic Electronics for CELLPHONE PCB Component Wed Jul 08, 2009 9:23 pm |
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wow salamat dodong ariel..kakugihan gyud akong palangga ba:D
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Joven
Posts : 2
Join date : 2011-04-12
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Subject: Re: Basic Electronics for CELLPHONE PCB Component Thu Apr 14, 2011 8:00 am |
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bos patulong s keypad ng 1200 no punktion ang DOWN UP OK and number 8
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Subject: Re: Basic Electronics for CELLPHONE PCB Component |
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