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Old 08-10-2012, 14:45   #21
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answer: Solution of identify nokia phone shorting

check shoting in nokia 7390.......


1....remove this COIL mark in (1) if u want to check the shoting of gsm pf .......remove the coil and ur shoting is gone then there is shoting in ur gsm pf .......


2..remove this coil mark in (2)..if u want to check rf ic is short because rf ic also got +b volt from battery....


3....remove these both coil mark in (3) if u want to check the shoting of wcdma pf and wcdma smps ic .......remove the coil and ur shoting is gone then there is shoting in ur wcdma pf and wacda smps ic.......


4..remove the resistance mark in (4) ..if u want to check irda module ... because irda module got +b from batery....


5..remove coil mark in (5)..if u want to check shoting cause by ringer ic ...if shoting is gone replace it because ringer ic also got +b volt from battery....


6..remove light ic mark in (6)..if u want to check the light ic is short....


7...remove bluetooth module mark in (7)..if u want to check blutooth ic is short because bluetooth ic also got +b volt from battery....


8..remove this ic mark in (8)..if u want to check the shorting cause flash light driver ic n1471 ....because this ic got +b from batery....


9..remove this coil mark in (9).. to check the shorting cause by n3402 ic this ic make volt for main camera (1.5v) remove this coil if u want to check the shorting cause by this ic....because this ic got +b from batery......


10..remove this ic n3401 mark in (10).. to check the shorting cause by n3401 ic this ic make volt for main camera (1.8v) remove this ic if u want to check the shorting cause by this ic....because this ic got +b from batery......


11..remove this ic n3300 mark in (11).. to check the shorting cause by n3300 ic this ic make volt for main camera (2.8v) remove this ic if u want to check the shorting cause by this ic....because this ic got +b from batery......

12..remove this ic n6050 mark in (12).. to check the shorting cause by n6050 ic this ic make volt for btfm and for lcd (2.8v) remove this ic if u want to check the shorting cause by this ic....because this ic got +b from batery......



13..remove this ic n4801 mark in (13).. to check the shorting cause by n4801 ic this ic make volt memory card (vsd) volt(2.8v) remove this ic if u want to check the shorting cause by this ic....because this ic got +b from batery......



14..at end remove betty and avilma ic to check shoting is gone or not........



all the component which are mark in pink colur these all are coils and resistance these are place in series and +b of batery is gone throw them so if u remove the coil and resistance u not have to remove ic to check the shorting in pcb it save time and ur ic ....
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