hOW TO AVIOD PROBLEMS IN MOBILE PHONES?

by barkkathulla 2012-09-20 16:58:50

6670/7610 SERVICING MANUAL


S.NO PLACE REASON
1 SWITCH ON PROBLEM  TO CHECK THE D461 SD RAM IC
 TO CHECK V CORE SUPPLY FROM SMPS
 TO CHECK ON/OFF SWITCH
 TO CHECK 26 MHZ CRYSTAL OSC
 TO CHECK THE BATTERY
2 NETWORK  TO CHECK VCOG 800
 TO CHECK WHETHER 26 MHZ CRYSTAL FREQUENCYIS CONSTANT OR NOT
 TO CHECK RF IC HAGER N5000 ,UEM ,CPU,ANTENNA(Z 800),RX,TXSWITCHES.
 TO CHECK THE SOFTWARE
 TO CHECK THE DEVICES ARE AFFECT IN WATER OR OTHER OILS
 CHECK THE RX FILTER Z803
3 POWER FAILURE  TO CHECK ON/OFF SWITCH
 TO CHECK 26 MHZ CRYSTAL OSC
 TO CHECK THE POWER ICUEM D250
 TO CHECK RF HAGER N 500RF IC,D460”K87561 ET-D17B PLASS IC
4 BATTERY CHARGE  TO CHECK THE CD 250 UEMCHARGING POWER IC,CHARGING TIP(IF FAULT CLEAN IT)
 TO CHECK THE CONNECTION OF CHARGING FUSE F 130&L 130 COIL
 TO CHANGE NEW CHARGER
 TO CHECK CHARGING SOCKET,BATTERY CONNECTION
 TO CHECK THE PROTECTOR DIODE V130 IN CHAREGR
5 CAMERA  TO CHECH CAMERA MODULE,D370 SWITCH,X 420 CAMERA CONNECTOR
 TO CHANGE THE CPU
 TP LOAD THE SOFTWARE
 TO CONTACT SOFTWARE ENGINEER
6 RING  FAULT IN RINGER TIP
 CHECK THE SPEAKER B 601,AUDIO IC N607S
 TO CHECK THE SPEAKER IS 8 OHMS.
 TO CHECK L 608,L 609,D 250,VIBRATOR PART .
7 HANGING  TO CHECK 26 MHZ OSC,RF IC,UEM SWITCH,FLASH IC
 TO LOAD THE SOFTWARE
 TO CHANGE THE UEM
 FINALLY AGAIN LOAD THE SOFTWARE.
8 LOW BATTERY AT CALLING TIME  TO CHECK THE BATTERY,UEM,PA POWER AMPLIFIER
9 RADIO  TO CHECK R451,D 440 USB IC,USB PRODUCTOR,USB IC,SYSTEM CONNECTOR X13.
10 BLUETOOTH COMMUNICATION  TO CHECK D 370 UPP-CPU UPP WD2-V 3.2E
 TO CHECK THE BLUE TOOTH IC D190
 MAY BE SOFTWARE DAMAGE.
11 SUDDENLY DISPLAY INCONNECTING THE SIM  TO CHECK UEM D250 POWERIC,SIM PRODUCTER R 310
 TO CHECK THE SERIES OF R 311 AND R 312
 TO CHECK THE SIM TRAY&SIM CARD
`12 MMC(MULTIMEDIA CARD)  TO CHECK THE MMC*311 CONNECTION,CPU SWITCH,MMC CARD DRIVE IC N310,MMC CARD PRODUCTER R315.
13 NO CONTACTS IN MOBILE  TO CHECK THE BACKUP BATTERY
700
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