There are 2 types of crystals
1.oscillator crystal 2.RTC(Real Time Clock) crysta
Functions of oscillator crystal-
oscillator crystal It is bright silver in color, it has 4 pins 1.(+) 2.(-) 3.(Output) 4.(AFC) oscillator crystal is always found near the network IC, above this its frequency is in megahertz. is written
Denoting letter- Unit- MHz
Functions of RTC crystal-
RTC crystal maintains date and time in mobile phone
Note: Crystal cannot be tested with a normal multimeter.
Denoting letter- Unit- Kilohertz
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