7.2.14

DIODE

DIODE-   A diode is a device that conducts current in only one direction.  The pn junction is the feature that allows diodes, certain transistors, and other devices to worK
There are many type of DIODE IN MOBILE PHONES .TWO PIN DIODE.THREE PIN DIODE.FOUR PIN DIODE.FIVE PIN DIODE.
TESTING OF TWO PIN DIODE-SET M/M ON CONTINUTY MODE.TEST DIODE ON BOTH SIDE.ONE SIDE SHOWS '1' AND SECOND SIDE SHOWS SOME VALUE THEN DIODE IS OK.OTHER WISE ,DIODE IS FAULTY. 

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