COIL

COIL-WHEN A INSULATED WIRE WOUNDED ON NON-CONDUCTED BASE
           IT CALLED CIOL.
TYPES OF COIL--IN MOBILE PHONE FOUR TYPE COILS ARE USED
1.NORMAL COIL
2.TWO COLOR COIL
3.DOTTED COIL
4.ROUND OR BOOST COIL

WORKING OF COIL---
COIL FILLTERED THE SIGNAL

COIL PASS D.C. CURRENT AND BLOCK A.C. CURRENT

PASS THE LOW FREQUENCY ,BLOCK HIGH FREQUENCY

BLOCK CHANGES OF CURRENT

OK TESTING----------

SET M/M ON BUZZ MODE
CHAKE COIL ON BOTH SIDE IF BEEP SOUND BLOW THEN
COIL IS OK
IF NO SOUND THEN COIL IS  OPEN OR FAULTY ..